阅读说明：本技术 整流驱动电路 (Rectifying drive circuit ) 是由 刘佩甲 赵德琦 吴壬华 于 2019-08-19 设计创作，主要内容包括：本申请实施例公开了一种整流驱动电路,所述整流驱动电路包括预充电路、可控硅电路、整流电路、电解电容和可控硅触发电路；整流驱动电路的输入为单相交流；整流驱动电路的输入端火线与高压直流正极输出端之间串联预充电路,整流驱动电路的输入端零线连接整流电路,在高压直流正极和高压直流负极输出端之间分别并联可控硅电路、整流电路和电解电容,可控硅触发电路连接可控硅电路；预充电路用于对电解电容进行充电,可控硅触发电路用于触发可控硅电路,可控硅电路用于对电解电容进行充电,可控硅电路和整流电路用于对单相交流输入进行整流。本申请实施例能避免现有技术中的机械器件的性能限制,有效实现了交流输入侧的预充及整流。(The embodiment of the application discloses a rectification drive circuit, which comprises a pre-charging circuit, a silicon controlled circuit, a rectification circuit, an electrolytic capacitor and a silicon controlled trigger circuit; the input of the rectification driving circuit is single-phase alternating current; a pre-charging circuit is connected in series between a live wire at the input end of the rectification driving circuit and an output end of a high-voltage direct current positive electrode, a zero line at the input end of the rectification driving circuit is connected with a rectification circuit, a silicon controlled rectifier circuit, a rectification circuit and an electrolytic capacitor are respectively connected in parallel between the high-voltage direct current positive electrode and the output end of a high-voltage direct current negative electrode, and a silicon controlled rectifier trigger circuit is connected with the; the pre-charging circuit is used for charging the electrolytic capacitor, the silicon controlled trigger circuit is used for triggering the silicon controlled circuit, the silicon controlled circuit is used for charging the electrolytic capacitor, and the silicon controlled circuit and the rectifying circuit are used for rectifying the single-phase alternating current input. The embodiment of the application can avoid the performance limitation of mechanical devices in the prior art, and effectively realizes the pre-charging and rectification of the alternating current input side.)

1. A commutation drive circuit, wherein the commutation drive circuit comprises: the device comprises a pre-charging circuit, a silicon controlled rectifier circuit, a rectifying circuit, an electrolytic capacitor and a silicon controlled rectifier trigger circuit;

the input of the rectification driving circuit is single-phase alternating current; the input end live wire of the rectification drive circuit is connected with the first end of the pre-charging circuit and the first end of the thyristor circuit, and the input end zero line of the rectification drive circuit is connected with the first end of the rectification circuit; the second end of the pre-charging circuit is connected with the second end of the thyristor circuit, the second end of the rectifying circuit, the anode of the electrolytic capacitor and the anode output end of the rectifying drive circuit; the negative electrode output end of the rectification driving circuit is connected with the negative electrode of the electrolytic capacitor, the third end of the rectification circuit and the third end of the thyristor circuit;

the first end of the silicon controlled trigger circuit is connected with the second end of the pre-charging circuit, and the second end of the silicon controlled trigger circuit is connected with the first end of the silicon controlled circuit;

the pre-charging circuit is used for charging the electrolytic capacitor, the silicon controlled trigger circuit is used for triggering the silicon controlled circuit when the voltage of the electrolytic capacitor reaches a first threshold value, the silicon controlled circuit is used for charging the electrolytic capacitor, and the silicon controlled circuit and the rectifying circuit are used for rectifying the input of the rectifying drive circuit.

2. The rectified driver circuit of claim 1 wherein the pre-charge circuit comprises a thermistor and a first rectifying diode; the first end of the thermistor is connected with a live wire at the input end of the rectification driving circuit, the second end of the thermistor is connected with the anode of the first rectification diode, the cathode of the first rectification diode is connected with the anode output end of the rectification driving circuit, the thermistor is used for limiting the current of input current, and the first rectification diode is used for rectifying the input current.

3. The circuit of claim 1 or 2, wherein the thyristor circuit comprises a first thyristor and a second thyristor; the cathode of the first controlled silicon is connected with the cathode of the first rectifying diode, the anode of the first controlled silicon is connected with the cathode of the second controlled silicon, the input end live wire of the rectifying drive circuit and the second end of the controlled silicon trigger circuit, and the control electrode of the first controlled silicon is connected with the third end of the controlled silicon trigger circuit; and the anode of the second controllable silicon is connected with the negative electrode output end of the rectification driving circuit, and the control electrode of the second controllable silicon is connected with the fourth end of the controllable silicon trigger circuit.

4. The circuit of claim 3, wherein the rectifying circuit comprises a second rectifying diode and a third rectifying diode; the negative pole of the second rectifier diode is connected with the negative pole of the first rectifier diode, the positive pole of the second rectifier diode is connected with the negative pole of the third rectifier diode and the zero line of the input end of the rectifier driving circuit, and the positive pole of the third rectifier diode is connected with the negative pole output end of the rectifier driving circuit.

5. The circuit of claim 4, wherein the thyristor trigger circuit comprises a transformer, a field effect transistor, a fourth rectifying diode, and a fifth rectifying diode;

the first input end of the silicon controlled trigger circuit is a direct current input with a voltage amplitude value of first voltage, and the first input end is connected with the first end of a primary coil of the transformer; a second input end of the silicon controlled trigger circuit is a Pulse Width Modulation (PWM) signal, and the second input end is connected with a grid electrode of the field effect tube; the source electrode of the field effect tube is grounded, and the drain electrode of the field effect tube is connected with the second end of the primary coil of the transformer; a first end of a first secondary coil of the transformer is connected with an anode of the fourth rectifying diode, a cathode of the fourth rectifying diode is connected with a control electrode of the first controllable silicon, and a second end of the first secondary coil of the transformer is connected with a cathode of the first rectifying diode; the first end of a second secondary coil of the transformer is connected with the anode of the fifth rectifying diode, the cathode of the fifth rectifying diode is connected with the control electrode of the second controllable silicon, the second end of the second secondary coil of the transformer is connected with the anode of the first controllable silicon, and the first end of a primary coil of the transformer, the first end of a first secondary coil of the transformer and the first end of a second secondary coil of the transformer are homonymy ends.

6. The circuit of claim 5, wherein the thyristor trigger circuit further comprises a first resistor, a second capacitor, and a sixth rectifying diode;

a first input end of the silicon controlled trigger circuit is connected with a first end of the second capacitor and a first end of the first resistor, a second end of the second capacitor is connected with a second end of the first resistor and a negative electrode of the sixth rectifying diode, and an anode of the sixth rectifying diode is connected with a second end of a primary coil of the transformer;

the first resistor, the second capacitor and the sixth rectifying diode form a protection circuit of the transformer, and the protection circuit of the transformer is used for discharging the transformer.

7. The circuit of claim 6, wherein the thyristor trigger circuit further comprises a second resistor and a third resistor;

the second resistor is connected in series between a second input end of the silicon controlled trigger circuit and a grid electrode of the field effect tube, the third resistor is connected in series between the grid electrode of the field effect tube and a source electrode of the field effect tube, the second resistor is used for filtering the Pulse Width Modulation (PWM) signal, and the third resistor is used for discharging the field effect tube.

8. The circuit of claim 7, wherein the thyristor trigger circuit further comprises a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a third capacitor, a fourth capacitor, a fifth capacitor, and a sixth capacitor;

a first end of the third capacitor is connected with a negative electrode of the fourth rectifying diode and a first end of the fourth resistor, a second end of the third capacitor is connected with a second end of the first secondary winding of the transformer, a second end of the fourth resistor is connected with a first end of the fifth resistor and a first end of the fourth capacitor, a second end of the fifth resistor is connected with a second end of the third capacitor and a second end of the fourth capacitor, a first end of the fourth capacitor is connected with a control electrode of the first thyristor, and a second end of the fourth capacitor is connected with a negative electrode of the first rectifying diode;

the third capacitor, the fourth resistor and the fourth capacitor are used for filtering an output signal of a first secondary coil of the transformer, and the fifth resistor is a load resistor;

a first end of the fifth capacitor is connected with a negative electrode of the fifth rectifying diode and a first end of the sixth resistor, a second end of the fifth capacitor is connected with a second end of a second secondary coil of the transformer, a second end of the sixth resistor is connected with a first end of the seventh resistor and a first end of the sixth capacitor, a second end of the seventh resistor is connected with a second end of the fifth capacitor and a second end of the sixth capacitor, a first end of the sixth capacitor is connected with a control electrode of the second thyristor, and a second end of the sixth capacitor is connected with an anode of the first thyristor;

the fifth capacitor, the sixth resistor and the sixth capacitor are used for filtering an output signal of the first secondary coil of the transformer, and the seventh resistor is a load resistor.

9. The circuit of claim 8, wherein the commutation drive circuit further comprises a protection module comprising a fuse, a seventh capacitor, and a first inductor;

the input end live wire of the rectification drive circuit is connected with the first end of the fuse, the second end of the fuse is connected with the first end of the seventh capacitor and the first end of the first coil of the first inductor, the second end of the seventh capacitor is connected with the first end of the second coil of the first inductor and the input end zero line of the rectification drive circuit, the second end of the first coil of the first inductor is connected with the first end of the thermistor, the second end of the second coil of the first inductor is connected with the anode of the second rectifier diode, and the first end of the first coil of the first inductor and the first end of the second coil of the first inductor are homonymous ends.

10. The circuit of claim 9, wherein the second input of the scr trigger circuit is a Pulse Width Modulation (PWM) signal having a first duty cycle and a first frequency.

Technical Field

The application relates to the technical field of new energy vehicles, in particular to a rectification driving circuit.

Background

The vehicle-mounted charger is a device for charging the vehicle-mounted power battery, and the pre-charging of the vehicle-mounted power battery is generally divided into an alternating current pre-charging mode and a direct current pre-charging mode. If alternating current pre-charging is adopted, the power part of the vehicle-mounted charger is divided into an alternating current input side and a high-voltage direct current output side.

A rectification drive circuit on the single-phase ac input side of a vehicle-mounted charger generally has a precharge function and a rectification function. As shown in fig. 1, the circuit is a common ac input side pre-charging and rectifying circuit in the market, after the circuit is powered on, the relay K1 is in an off state, the single-phase ac input pre-charges the electrolytic capacitor through the current-limiting resistor, and when the voltage of the pre-charged electrolytic capacitor reaches a certain threshold, the relay is turned off, so that the current-limiting resistor is short-circuited, and the electrolytic capacitor is directly pre-charged through the relay. However, since relays are mechanical devices, the relays have a life limit and need to be checked periodically, and the failure of a relay may cause damage to the normal operation of the equipment. Furthermore, as power specifications increase, the performance requirements for relays also increase.

Content of application

Based on this, the embodiment of the application provides a rectification drive circuit, which can avoid the performance limitation problem of a mechanical device in the prior art, and effectively realize the pre-charging and rectification of the single-phase alternating current input side.

The embodiment of the application provides a rectification drive circuit, which comprises a pre-charging circuit, a silicon controlled circuit, a rectification circuit, an electrolytic capacitor and a silicon controlled trigger circuit;

the input of the rectification driving circuit is single-phase alternating current; the input end live wire of the rectification drive circuit is connected with the first end of the pre-charging circuit and the first end of the thyristor circuit, and the input end zero line of the rectification drive circuit is connected with the first end of the rectification circuit; the second end of the pre-charging circuit is connected with the second end of the thyristor circuit, the second end of the rectifying circuit, the anode of the electrolytic capacitor and the anode output end of the rectifying drive circuit; the negative electrode output end of the rectification driving circuit is connected with the negative electrode of the electrolytic capacitor, the third end of the rectification circuit and the third end of the thyristor circuit;

the first end of the silicon controlled trigger circuit is connected with the second end of the pre-charging circuit, and the second end of the silicon controlled trigger circuit is connected with the first end of the silicon controlled circuit;

the pre-charging circuit is used for charging the electrolytic capacitor, the silicon controlled trigger circuit is used for triggering the silicon controlled circuit when the voltage of the electrolytic capacitor reaches a first threshold value, the silicon controlled circuit is used for charging the electrolytic capacitor, and the silicon controlled circuit and the rectifying circuit are used for rectifying the input of the rectifying drive circuit.

Optionally, the pre-charging circuit includes a thermistor and a first rectifying diode; the first end of the thermistor is connected with a live wire at the input end of the rectification driving circuit, the second end of the thermistor is connected with the anode of the first rectification diode, the cathode of the first rectification diode is connected with the anode output end of the rectification driving circuit, the thermistor is used for limiting the current of input current, and the first rectification diode is used for rectifying the input current.

Optionally, the thyristor circuit includes a first thyristor and a second thyristor; the cathode of the first controlled silicon is connected with the cathode of the first rectifying diode, the anode of the first controlled silicon is connected with the cathode of the second controlled silicon, the input end live wire of the rectifying drive circuit and the second end of the controlled silicon trigger circuit, and the control electrode of the first controlled silicon is connected with the third end of the controlled silicon trigger circuit; and the anode of the second controllable silicon is connected with the negative electrode output end of the rectification driving circuit, and the control electrode of the second controllable silicon is connected with the fourth end of the controllable silicon trigger circuit.

Optionally, the rectifier circuit includes a second rectifier diode and a third rectifier diode; the negative pole of the second rectifier diode is connected with the negative pole of the first rectifier diode, the positive pole of the second rectifier diode is connected with the negative pole of the third rectifier diode and the zero line of the input end of the rectifier driving circuit, and the positive pole of the third rectifier diode is connected with the negative pole output end of the rectifier driving circuit.

Optionally, the thyristor trigger circuit includes a transformer, a field effect transistor, a fourth rectifying diode, and a fifth rectifying diode; the first input end of the silicon controlled trigger circuit is a direct current input with a voltage amplitude value of first voltage, and the first input end is connected with the first end of a primary coil of the transformer; a second input end of the silicon controlled trigger circuit is a Pulse Width Modulation (PWM) signal, and the second input end is connected with a grid electrode of the field effect transistor; the source electrode of the field effect tube is grounded, and the drain electrode of the field effect tube is connected with the second end of the primary coil of the transformer; a first end of a first secondary coil of the transformer is connected with an anode of the fourth rectifying diode, a cathode of the fourth rectifying diode is connected with a control electrode of the first controllable silicon, and a second end of the first secondary coil of the transformer is connected with a cathode of the first rectifying diode; the first end of a second secondary coil of the transformer is connected with the anode of the fifth rectifying diode, the cathode of the fifth rectifying diode is connected with the control electrode of the second controllable silicon, the second end of the second secondary coil of the transformer is connected with the anode of the first controllable silicon, and the first end of a primary coil of the transformer, the first end of a first secondary coil of the transformer and the first end of a second secondary coil of the transformer are homonymy ends.

Optionally, the thyristor trigger circuit further includes a first resistor, a second capacitor, and a sixth rectifying diode; a first input end of the silicon controlled trigger circuit is connected with a first end of the second capacitor and a first end of the first resistor, a second end of the second capacitor is connected with a second end of the first resistor and a negative electrode of the sixth rectifying diode, and an anode of the sixth rectifying diode is connected with a second end of a primary coil of the transformer; the first resistor, the second capacitor and the sixth rectifying diode form a protection circuit of the transformer, and the protection circuit of the transformer is used for discharging the transformer.

Optionally, the thyristor trigger circuit further includes a second resistor and a third resistor; the second resistor is connected in series between a second input end of the silicon controlled trigger circuit and a grid electrode of the field effect tube, the third resistor is connected in series between the grid electrode of the field effect tube and a source electrode of the field effect tube, the second resistor is used for filtering the Pulse Width Modulation (PWM) signal, and the third resistor is used for discharging the field effect tube.

Optionally, the thyristor trigger circuit further includes a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a third capacitor, a fourth capacitor, a fifth capacitor, and a sixth capacitor; a first end of the third capacitor is connected with a negative electrode of the fourth rectifying diode and a first end of the fourth resistor, a second end of the third capacitor is connected with a second end of the first secondary winding of the transformer, a second end of the fourth resistor is connected with a first end of the fifth resistor and a first end of the fourth capacitor, a second end of the fifth resistor is connected with a second end of the third capacitor and a second end of the fourth capacitor, a first end of the fourth capacitor is connected with a control electrode of the first thyristor, and a second end of the fourth capacitor is connected with a negative electrode of the first rectifying diode; the third capacitor, the fourth resistor and the fourth capacitor are used for filtering an output signal of a first secondary coil of the transformer, and the fifth resistor is a load resistor; a first end of the fifth capacitor is connected with a negative electrode of the fifth rectifying diode and a first end of the sixth resistor, a second end of the fifth capacitor is connected with a second end of a second secondary coil of the transformer, a second end of the sixth resistor is connected with a first end of the seventh resistor and a first end of the sixth capacitor, a second end of the seventh resistor is connected with a second end of the fifth capacitor and a second end of the sixth capacitor, a first end of the sixth capacitor is connected with a control electrode of the second thyristor, and a second end of the sixth capacitor is connected with an anode of the first thyristor; the fifth capacitor, the sixth resistor and the sixth capacitor are used for filtering an output signal of the first secondary coil of the transformer, and the seventh resistor is a load resistor.

Optionally, the rectifying driving circuit further includes a protection module, where the protection module includes a fuse, a seventh capacitor, and a first inductor; the input end live wire of the rectification drive circuit is connected with the first end of the fuse, the second end of the fuse is connected with the first end of the seventh capacitor and the first end of the first coil of the first inductor, the second end of the seventh capacitor is connected with the first end of the second coil of the first inductor and the input end zero line of the rectification drive circuit, the second end of the first coil of the first inductor is connected with the first end of the thermistor, the second end of the second coil of the first inductor is connected with the anode of the second rectifier diode, and the first end of the first coil of the first inductor and the first end of the second coil of the first inductor are homonymous ends.

Optionally, a second input end of the thyristor trigger circuit is a pulse width modulation PWM signal, a duty ratio of the pulse width modulation PWM signal is a first duty ratio, and a frequency of the pulse width modulation PWM signal is a first frequency.

In the embodiment of the application, after the single-phase alternating current is input into the rectification driving circuit, the pre-charging circuit pre-charges the electrolytic capacitor. When the voltage value at the two ends of the electrolytic capacitor reaches a certain threshold value, the silicon controlled trigger circuit triggers the silicon controlled circuit to realize the conduction of the silicon controlled circuit, so that the pre-charging circuit is in short circuit. After the pre-charging circuit is short-circuited, the input single-phase alternating current continues to pre-charge the electrolytic capacitor through the silicon controlled rectifier circuit. The input single-phase alternating current is rectified through the thyristor circuit and the rectifying circuit. Through the rectification drive circuit provided by the embodiment of the application, the problem of performance limitation of mechanical devices in the prior art can be avoided, and pre-charging and rectification on the input side of single-phase alternating current are effectively realized.

Drawings

Reference will now be made in brief to the drawings that are needed in describing embodiments or prior art.

Fig. 1 is a schematic diagram of a conventional rectifying driving circuit in the prior art;

fig. 2 is a schematic structural diagram of a first rectifying driving circuit provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a second rectifying driving circuit provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a third rectifying driving circuit provided in the embodiment of the present application;

fig. 5 is a schematic structural diagram of a thyristor trigger circuit according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of another thyristor trigger circuit according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another thyristor trigger circuit provided in the embodiment of the present application;

fig. 8 is a schematic structural diagram of a fourth rectifying driving circuit provided in the embodiment of the present application;

fig. 9 is a schematic structural diagram of a fifth rectifying driving circuit provided in an embodiment of the present application;

fig. 10 is a schematic structural diagram of a sixth rectifying driving circuit provided in an embodiment of the present application;

fig. 11 is a schematic structural diagram of a charging device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.

It is to be understood that the terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only, and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Fig. 2 is a schematic structural diagram of a first rectifying driving circuit 200 according to an embodiment of the present disclosure. As can be seen from fig. 2, the rectifying driving circuit 200 includes a precharge circuit 201, a thyristor circuit 202, a rectifying circuit 203, a thyristor trigger circuit 204, and an electrolytic capacitor C1. As shown in fig. 2, the input of the rectifying drive circuit is single-phase ac, and the output of the rectifying drive circuit is high-voltage dc.

The structure and function of the rectifying driving circuit 200 provided in the embodiment of the present application will be described in detail below.

As shown in fig. 2, the input end live line of the rectifying drive circuit 200 is connected to the first end 2011 of the precharge circuit 201 and the first end 2021 of the thyristor circuit 202, and the input end neutral line of the rectifying drive circuit 200 is connected to the first end 2031 of the rectifying circuit 203. The second end 2012 of the precharge circuit 201 is connected to the second end 2022 of the thyristor circuit 202, the second end 2032 of the rectifier circuit 203, the anode of the electrolytic capacitor C1, and the anode output end of the rectifier driving circuit 200. The negative output terminal of the rectification driving circuit 200 is connected to the negative electrode of the electrolytic capacitor C1, the third terminal 2033 of the rectification circuit 203 and the third terminal 2023 of the thyristor circuit 202. The first terminal 2041 of the thyristor trigger circuit 204 is connected to the second terminal 2012 of the precharge circuit 201, and the second terminal 2042 of the thyristor trigger circuit 204 is connected to the first terminal 2021 of the thyristor circuit.

The pre-charging circuit 201 is used for charging the electrolytic capacitor C1, and the thyristor trigger circuit 204 is used for triggering the thyristor circuit 202 when the voltage of the electrolytic capacitor C1 reaches a first threshold value. The thyristor circuit 202 is used to charge the electrolytic capacitor C1, and the thyristor circuit 202 and the rectifier circuit 203 are used to rectify the input of the rectifier driving circuit 200.

The working principle of the rectifying driving circuit 200 provided by the embodiment of the application is as follows: after the single-phase ac input of the rectifying drive circuit, the precharge circuit 201 precharges the electrolytic capacitor C1. When the voltage value at the two ends of the electrolytic capacitor C1 reaches the first threshold value, the thyristor trigger circuit 204 triggers the thyristor circuit 202 to achieve the conduction of the thyristor circuit 202, so that the pre-charging circuit 201 is short-circuited. After the short circuit of the pre-charging circuit 201, the input single-phase alternating current continues to pre-charge the electrolytic capacitor C1 through the thyristor circuit 202. The input single-phase alternating current is rectified through the thyristor circuit 202 and the rectifying circuit 203.

Optionally, the first threshold is determined according to actual requirements, and this is not specifically limited in this application.

Optionally, as shown in fig. 3, the pre-charge circuit 201 includes a thermistor RT1 and a first rectifying diode D1.

Specifically, a first end e01 of the thermistor RT1 is connected to the input end live wire of the rectifying drive circuit 200, a second end e02 of the thermistor RT1 is connected to the anode of the first rectifying diode D1, and the cathode of the first rectifying diode D1 is connected to the anode output end of the rectifying drive circuit 200. The thermistor RT1 is used to limit the input current, and the first rectifying diode D1 is used to rectify the input current.

It can be understood from fig. 3 that after the single-phase ac input of the rectifying driving circuit 200 is rectified, the single-phase ac input flows to the thermistor RT1 through the live line, and the thermistor RT1 limits the current of the single-phase ac input. The thermistor RT1 then outputs current to the first rectifier diode D1, and the first rectifier diode D1 rectifies the single-phase ac input, thereby converting the ac to dc. The direct current output from the first rectifying diode D1 flows to the positive electrode of the electrolytic capacitor C1, and the output current of the negative electrode of the electrolytic capacitor C1 flows to the zero line via the rectifying circuit 203, thereby precharging the electrolytic capacitor C1.

Optionally, as shown in fig. 3, the thyristor circuit 202 includes a first thyristor SC1 and a second thyristor SC 2.

Specifically, the cathode of the first thyristor SC1 is connected to the cathode of the first rectifier diode D1, the anode of the first thyristor SC1 is connected to the cathode of the second thyristor SC2, the input terminal hot line of the rectifier driving circuit 200 and the second end 2042 of the thyristor trigger circuit 204, the second end e12 of the second capacitor C2 is connected to the second end e10 of the first resistor R1 and the cathode of the sixth rectifier diode D6, and the anode of the sixth rectifier diode D6 is connected to the second end e04 of the primary winding of the transformer T1. The first resistor R1, the second capacitor C2 and the sixth rectifying diode D6 constitute a protection circuit of the transformer T1, and the protection circuit of the transformer T1 is used to discharge the transformer T1.

Optionally, as shown in fig. 6, the scr trigger circuit 204 further includes a second resistor R2 and a third resistor R3.

Specifically, the second input terminal of the scr trigger circuit 204 is connected to the first terminal e13 of the second resistor R2, the second terminal e14 of the second resistor R2 is connected to the gate of the fet Q1 and the first terminal e15 of the third resistor R3, and the second terminal e16 of the third resistor R3 is connected to the source of the fet Q1. The second resistor R2 is used for filtering the PWM signal, and the third resistor R3 is used for discharging the fet Q1.

Optionally, as shown in fig. 7, the scr trigger circuit 204 further includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6.

Specifically, a first end e17 of the third capacitor C3 is connected to a cathode of the fourth rectifying diode D4 and a first end e19 of the fourth resistor R4, a second end e18 of the third capacitor C3 is connected to a second end e06 of the first secondary winding of the transformer T1, a second end e20 of the fourth resistor R4 is connected to a first end e21 of the fifth resistor R5 and a first end e23 of the fourth capacitor C4, a second end e22 of the fifth resistor R5 is connected to a second end e18 of the third capacitor C3 and a second end e24 of the fourth capacitor C4, a first end e23 of the fourth capacitor C4 is connected to a control electrode of the first thyristor SC1, and a second end e24 of the fourth capacitor C4 is connected to a cathode of the first rectifying diode D1. The third capacitor C3, the fourth resistor R4 and the fourth capacitor C4 are used for filtering the output signal of the first secondary winding of the transformer T1, and the fifth resistor R5 is a load resistor. A first end e25 of the fifth capacitor C5 is connected to the cathode of the fifth rectifier diode D5 and the first end e27 of the sixth resistor R6, a second end e26 of the fifth capacitor C5 is connected to the second end e08 of the second secondary winding of the transformer T1, a second end e28 of the sixth resistor R6 is connected to the first end e29 of the seventh resistor R7 and the first end e31 of the sixth capacitor C6, a second end e30 of the seventh resistor R7 is connected to the second end e26 of the fifth capacitor C5 and the second end e32 of the sixth capacitor C6, a first end e31 of the sixth capacitor C6 is connected to the control electrode of the second thyristor SC2, and a second end e32 of the sixth capacitor C6 is connected to the anode of the first thyristor SC 1. The fifth capacitor C5, the sixth resistor R6 and the sixth capacitor C6 are used for filtering the output signal of the first secondary winding of the transformer T1, and the seventh resistor R7 is a load resistor.

Optionally, as shown in fig. 8, the rectifying driving circuit 200 further includes a protection module, and the protection module includes a fuse F1, a seventh capacitor C7, and a first inductor L1.

Specifically, the input end of the rectifying drive circuit 200 is connected to the first end e33 of the fuse F1 in a live wire mode, the second end e34 of the fuse F1 is connected to the first end e37 of the first coil of the first inductor L1 and the first end e35 of the seventh capacitor C7, the second end e36 of the seventh capacitor C7 is connected to the first end e39 of the second coil of the first inductor L1 and the input end neutral wire of the rectifying drive circuit 200, the second end e38 of the first coil of the first inductor L1 is connected to the first end e01 of the thermistor RT1, the second end e40 of the second coil of the first inductor L1 is connected to the positive electrode of the second rectifying diode D2, and the first end e37 of the first coil of the first inductor L1 and the first end e39 of the second coil of the first inductor L1 are the same name end e 39.

Optionally, a second input end of the thyristor trigger circuit 204 is a pulse width modulation PWM signal, a duty ratio of the pulse width modulation PWM signal is a first duty ratio, and a frequency of the pulse width modulation PWM signal is a first frequency.

For example, the first duty cycle is 30% and the first frequency is 30 KHz.

In the embodiment of the application, after the single-phase alternating current is input into the rectification driving circuit, the pre-charging circuit pre-charges the electrolytic capacitor. When the voltage value at the two ends of the electrolytic capacitor reaches a certain threshold value, the silicon controlled trigger circuit triggers the silicon controlled circuit to realize the conduction of the silicon controlled circuit, so that the pre-charging circuit is in short circuit. After the pre-charging circuit is short-circuited, the input single-phase alternating current continues to pre-charge the electrolytic capacitor through the silicon controlled rectifier circuit. The input single-phase alternating current is rectified through the thyristor circuit and the rectifying circuit. Through the rectification drive circuit provided by the embodiment of the application, the problem of performance limitation of mechanical devices in the prior art can be avoided, and the pre-charging and rectification on the alternating current input side are effectively realized. In addition, the rectification drive circuit provided by the embodiment of the application realizes rectification of single-phase alternating current input through the first controllable silicon, the second rectifying diode and the third rectifying diode. The forward conduction voltage drop of silicon controlled rectifier is less than rectifier diode's forward conduction voltage drop, consequently, compares and realizes bridge rectifier through four rectifier diode among the prior art, and the energy consumption that this application embodiment realized the rectification function is littleer.

Optionally, fig. 9 is a schematic diagram of a fifth structure of the rectifying driving circuit 200 according to the embodiment of the present application. As shown in the figure, the first thyristor SC1, the second thyristor SC2, the second rectifier diode D2 and the third rectifier diode D3 are connected as follows: the cathode of the first thyristor SC1 is connected to the cathode of the first rectifying diode D2 and the second end e06 of the first secondary winding of the transformer T1, the anode of the first thyristor SC1 is connected to the cathode of the second rectifying diode D2 and the live wire of the input end of the rectifying drive circuit, and the control electrode of the first thyristor SC1 is connected to the cathode of the fourth rectifying diode D4. The cathode of the second controlled silicon SC2 is connected with the cathode of the first rectifier diode D1, the second end e08 of the second secondary winding of the transformer T1 and the anode of the electrolytic capacitor C1, the anode of the second controlled silicon SC2 is connected with the cathode of the third rectifier diode D3 and the zero line of the input end of the rectifier driving circuit, and the control electrode of the second controlled silicon SC2 is connected with the cathode of the fifth rectifier diode D5. The anode of the third rectifying diode D3 is connected to the anode of the second rectifying diode D2 and the cathode of the electrolytic capacitor C1.

It will be appreciated that the same principle of operation as the rectified driver circuit 200 shown in figure 4 is that the single phase ac input is passed via the hot line to the thermistor RT1, and the thermistor RT1 limits the current of the single phase ac input. The thermistor RT1 then outputs current to the first rectifier diode D1, and the first rectifier diode D1 rectifies the single-phase ac input, thereby converting the ac to dc. The direct current output from the first rectifying diode D1 flows to the positive electrode of the electrolytic capacitor C1, and the output current of the negative electrode of the electrolytic capacitor C1 flows to the zero line via the rectifying circuit 203, thereby precharging the electrolytic capacitor C1.

It can be understood that, by precharging the electrolytic capacitor C1 through the precharging circuit 201, when the voltage across the electrolytic capacitor C1 reaches the first threshold, the thyristor triggering circuit 204 triggers the first thyristor SC1 to conduct and the second thyristor SC2 to conduct. After the first silicon controlled rectifier SC1 and the second silicon controlled rectifier SC2 are conducted, single-phase alternating current input flows to the anode of the first silicon controlled rectifier SC1 through a live wire, the output current of the cathode of the first silicon controlled rectifier SC1 flows to the anode of the electrolytic capacitor C1, the output current of the cathode of the electrolytic capacitor C1 flows to the zero line through the third rectifier diode D3, and therefore the electrolytic capacitor C1 is precharged continuously. The single-phase alternating current input flows to the anode of the second thyristor SC2 through the zero line, the output current of the cathode of the second thyristor SC2 flows to the anode of the electrolytic capacitor C1, the output current of the cathode of the electrolytic capacitor C1 flows to the anode of the second rectifier diode D2, the output current of the cathode of the second rectifier diode D2 flows to the live wire, and therefore the electrolytic capacitor C1 is continuously precharged. It can be seen that rectification of a single-phase ac input is achieved by the above process.

It can be understood that the operation principle of the rectifying driving circuit 200 shown in fig. 9 is the same as that of the rectifying driving circuit 200 shown in fig. 4, and the structures and functions of other components are the same except that the connection modes of the first thyristor SC1, the second thyristor SC2, the second rectifying diode D2 and the third rectifying diode D3 are different, and are not described herein again.

Optionally, fig. 10 is a schematic diagram of a sixth structure of the rectifying driving circuit 200 according to the embodiment of the present application. As shown in the figure, the thermistor RT1 in the pre-charging circuit 201 is connected to the first rectifier diode D1, the first thyristor SC1, the second thyristor SC2, the second rectifier diode D2 and the third rectifier diode D3 in the following manner: the anode of the third rectifying diode D3 is connected to the live wire of the input terminal of the rectifying driving circuit, the cathode of the first thyristor SC1 and the second end e06 of the first secondary winding of the transformer T1, and the cathode of the third rectifying diode D3 is connected to the cathode of the second rectifying diode D2 and the anode of the electrolytic capacitor C1. The anode of the second rectifying diode D2 is connected to the cathode of the second thyristor SC2, the zero line of the input end of the rectifying driving circuit, and the second end e08 of the second secondary winding of the transformer T1. The anode of the first controlled silicon SC1 is connected with the anode of the second controlled silicon SC2, the cathode of the electrolytic capacitor C1 and the first end e01 of the thermistor RT1, the control electrode of the first controlled silicon SC1 is connected with the cathode of the fourth rectifier diode D4, and the control electrode of the second controlled silicon SC1 is connected with the cathode of the fifth rectifier diode D5. The second end e02 of the thermistor RT1 is connected to the anode of the first rectifying diode D1, and the cathode of the first rectifying diode D1 is connected to the zero line at the input end of the rectifying driving circuit.

It can be understood that after the single-phase alternating current is input, the alternating current flows to the anode of the electrolytic capacitor C1 through the third rectifier diode D3, the output current of the cathode of the electrolytic capacitor C1 flows to the first end e01 of the thermistor RT1, the thermistor RT1 limits the input current, and the output current of the second end e02 of the thermistor RT1 flows to the zero line through the first rectifier diode D1. The electrolytic capacitor C1 is precharged through the above-described process.

It can be understood that, when the voltage across the electrolytic capacitor C1 reaches the first threshold value by precharging the electrolytic capacitor C1 through the thermistor RT1 and the first rectifier diode D1, the thyristor trigger circuit 204 triggers the first thyristor SC1 to be turned on and the second thyristor SC2 to be turned on. After the first silicon controlled rectifier SC1 and the second silicon controlled rectifier SC2 are conducted, single-phase alternating current input flows to the anode of the third rectifying diode D3 through a live wire, the output current of the cathode of the third rectifying diode D3 flows to the anode of the electrolytic capacitor C1, the output current of the cathode of the electrolytic capacitor C1 flows to the zero line through the second silicon controlled rectifier SC2, and therefore the electrolytic capacitor C1 is precharged continuously. The single-phase alternating current input flows to the anode of the second rectifier diode D2 through the zero line, the output current of the cathode of the second rectifier diode D2 flows to the anode of the electrolytic capacitor C1, the output current of the cathode of the electrolytic capacitor C1 flows to the anode of the first thyristor SC1, the output current of the cathode of the first thyristor SC1 flows to the live wire, and the electrolytic capacitor C1 is continuously precharged. It can be seen that rectification of a single-phase ac input is achieved by the above process.

It can be understood that the operation principle of the rectifying driving circuit 200 shown in fig. 10 is the same as that of the rectifying driving circuit 200 shown in fig. 4, and the structures and functions of other components are the same except that the connection modes of the thermistor RT1, the first rectifying diode D1, the first thyristor SC1, the second thyristor SC2, the second rectifying diode D2 and the third rectifying diode D3 are different, and are not described herein again.

Referring to fig. 11, fig. 11 is a schematic diagram of a hardware structure of a charging device 300 according to an embodiment of the present disclosure. The charging device 300 includes: a memory 301, a transceiver 302, a processor 303 coupled to the memory 301 and the transceiver 302, and a commutation drive circuit 304. The memory 301 is used for storing instructions, the processor 303 is used for executing the instructions, the transceiver 302 is used for communicating with other devices under the control of the processor 303, and the rectifying drive circuit 304 is used for converting single-phase alternating current input into high-voltage direct current output.

The processor 303 may be a Central Processing Unit (CPU), a general-purpose processor, a Digital Signal Processor (DSP), an application-specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), other programmable logic devices (FPGAs), a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure of the embodiments of the application. A processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a DSP and a microprocessor, or the like. The transceiver 302 may be a communication interface, transceiver circuitry, etc., where a communication interface is a generic term that may include one or more interfaces.

Optionally, the charging device 300 may further include a bus 305. The memory 301, the transceiver 302, the processor 303 and the single-phase adaptive phase-locked loop 304 may be connected to each other through a bus 305; the bus 305 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 305 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 3, but this does not mean only one bus or one type of bus.

In addition to the memory 301, the transceiver 303, the processor 303, the rectifying driving circuit 304 and the bus 305 shown in fig. 3, the charging device 300 in the embodiment of the present application may further include other hardware according to the actual function of the charging device, which is not described in detail herein.

The steps of a method or algorithm described in connection with the disclosure of the embodiments of the application may be embodied in hardware or in software instructions executed by a processor. The software instructions may be composed of corresponding software modules, and the software modules may be stored in a Random Access Memory (RAM), a flash memory, a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a register, a hard disk, a removable hard disk, a compact disc read only memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in a network device. Of course, the processor and the storage medium may reside as discrete components in a network device.

Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in the embodiments of the present application may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the embodiments of the present application in further detail, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present application, and are not intended to limit the scope of the embodiments of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of the embodiments of the present application.