阅读说明：本技术 一种直流电机闭环电源系统 (Closed-loop power supply system of direct current motor ) 是由 全威 郭春林 吴文贤 肖胜宇 于 2020-04-24 设计创作，主要内容包括：本发明提供了一种直流电机闭环电源系统,通过设置保护电路模块,既可以提供有效的不同电机控制器所对应的直流电压和对其电压进行跟踪保护,也可以在研发过程中出现过压和过流时对其进行拉低继续运行或停电双保护,还可以对电机转速反馈跟踪,且使用的硬件电路保护响应快、精度高和防误保护等；从而为不同类型的直流电机控制器研发提供直接可靠的供电系统。(The invention provides a closed-loop power supply system of a direct current motor, which can provide effective direct current voltages corresponding to different motor controllers and track and protect the voltages of the direct current voltages by arranging a protection circuit module, can also carry out pull-down continuous operation or power failure double protection when overvoltage and overcurrent occur in the research and development process, can also carry out feedback tracking on the rotating speed of the motor, and has the advantages of quick response, high precision, anti-misoperation protection and the like of the used hardware circuit protection; therefore, a direct and reliable power supply system is provided for the research and development of different types of direct current motor controllers.)

1. A closed loop power supply system for a dc motor, comprising:

the rectifier circuit module is connected with the alternating current and rectifies the input alternating current;

the Buck-Boost circuit module is connected with the rectifying circuit module;

the direct current output circuit module is connected with the Buck-Boost circuit module;

the main controller circuit module is connected with the Buck-Boost circuit module and used for controlling the Buck-Boost circuit module to rectify alternating current into direct current so as to provide power for the direct current motor through the direct current output circuit module;

the detection circuit module is connected with the main controller circuit module and is used for detecting the current, the voltage and the rotating speed of the direct current motor;

and the protection circuit module is connected between the main controller circuit module and the detection circuit module to realize the protection of the current, the voltage and the rotating speed of the direct current motor.

2. The system of claim 1, wherein the protection circuit module comprises: a direct current output voltage and current detection circuit and a voltage first-stage protection circuit;

the voltage first-stage protection circuit is used for acquiring direct-current output voltage and direct-current output voltage of the current detection circuit in real time, generating a signal in a linear relation with the direct-current output voltage, adjusting output reference voltage of the direct-current output voltage according to the level of the direct-current output voltage, and then generating a voltage calibration signal of a first set threshold value by comparing the reference signal with a voltage signal.

3. The system of claim 2, wherein the protection circuit module further comprises:

a current first stage protection circuit comprising: a reference current first circuit, a signal processing circuit and a signal forming first circuit;

the direct current output voltage and current detection circuit obtains the voltage and current output by the detection circuit module, and meanwhile, the reference output voltage first circuit and the reference current first circuit generate reference voltage and reference current, and then the signals are output after being compared and amplified through the signal processing circuit.

4. The system of claim 3, wherein the protection circuit module further comprises: and the voltage and current second-stage protection circuit is used for detecting signals output by the voltage first-stage protection circuit and the current first-stage protection circuit in real time and forming a second set threshold power-off protection signal.

5. The system of claim 4, wherein the voltage first stage protection circuit comprises a reference output voltage first circuit;

the voltage and current second stage protection circuit includes: a reference voltage second circuit, a signal forming second circuit and a main control circuit;

when the first circuit of the reference output voltage generates no signal or the formed signal is smaller than a first set threshold value, the current output of the direct current motor is normal;

when a reference output voltage first circuit forms a signal and is greater than a first set threshold value, transmitting the signal to the main control circuit;

when the reference output voltage first circuit forms a signal and is greater than a second set threshold value, the reference voltage second circuit and the signal form a first circuit output signal, the signal forms a second circuit to process, and then the output signal is transmitted to the main control circuit, namely a power-off signal is generated.

6. The system of claim 3, wherein the voltage first stage protection circuit: the circuit comprises a voltage sensor (S1), a resistor (R1), a resistor (R2), a resistor (R3), a resistor (R4), a resistor (R5), a resistor (R6), a resistor (R7), a resistor (R8), a resistor (R9), a resistor (R10), a resistor (R11), a resistor (R12), a resistor (R13), a resistor (R14), an operational amplifier (U1), an operational amplifier (U2), an operational amplifier (U3), an operational amplifier (U4), an operational amplifier (U5), a triode (Q1), a triode (Q2), a slide rheostat (RS1) and a capacitor (C1); wherein the content of the first and second substances,

one end of the resistor (R1) is connected with a power supply voltage, and the other end of the resistor (R1) is connected with one end of the slide rheostat (RS 1); the other end of the slide rheostat (RS1) is connected with the resistor (R2), and the middle end of the slide rheostat (RS1) is connected with the positive end of the operational amplifier (U1);

the other end of the resistor (R2) is connected with the ground end, the negative end and the output end of the operational amplifier (U1) are simultaneously connected with the resistor (R6), the other end of the resistor (R6) is connected with the positive end of the operational amplifier (U3), the negative end of the operational amplifier (U3) is connected with the resistor (R5) and the resistor (R8), and the other end of the resistor (R5) is connected with the ground;

the voltage sensor (S1) is connected with one end of a resistor (R4), the other end of the resistor (R4) is connected with the positive end of the operational amplifier (U2), one end of the resistor (R3) is grounded, the other end of the resistor (R3) is connected with the negative end of the operational amplifier (U2) and one end of the resistor (R7), the other end of the resistor (R8) is connected with the output end of the operational amplifier (U3), the emitter of the triode (Q2) and the resistor (R10), and the other end of the resistor (R10) is connected with the positive end of the operational amplifier (U4);

the output end of the operational amplifier (U2) is simultaneously connected with the other end of the resistor (R7), the emitter of the triode (Q1) and one end of the resistor (R9), and the other end of the resistor (R9) is simultaneously connected with one end of the resistor (R11) and the negative end of the operational amplifier (U4); the other end of the resistor (R11) is connected with the output end of the operational amplifier (U4), the base of the triode (Q1) and the base of the triode (Q2) at the same time, one end of the capacitor (C1) is connected with the collector of the triode (Q1) and one end of the resistor (R12) at the same time, the other end of the capacitor (C1) is connected with the collector of the triode (Q2) and one end of the resistor (R13), the other end of the resistor (R12) is connected with the negative end of the operational amplifier (U5) and one end of the resistor (R14), the other end of the resistor (R14) is connected with the output end of the operational amplifier (U5), and one end of the resistor (R13) is connected with the positive end of the operational amplifier (U5.

7. The system of claim 3, wherein the current first stage protection circuit comprises: the current detection circuit comprises a current sensor (S2), a resistor (R15), a resistor (R16), a resistor (R17), a resistor (R18), a resistor (R19), a resistor (R20), a resistor (R21), a resistor (R22), a resistor (R23), a resistor (R24), a resistor (R25), a resistor (R26), a resistor (R27), a resistor (R28), a resistor (R29), a resistor (R30), an operational amplifier (U6), an operational amplifier (U7), an operational amplifier (U8), an operational amplifier (U9), an operational amplifier (U10), a triode (Q3), a slide rheostat (RS2) and a capacitor (C2);

one end of a sliding rheostat (RS2) is connected, the middle section of the ground is connected with one end of a resistor (R15), the other end of the resistor (R15) is simultaneously connected with one end of the resistor (R17) and the positive end of an operational amplifier (U6), the negative end of the operational amplifier (U6) is connected with one end of a resistor (R16), the other end of the resistor (R16) is grounded, and the output end of the operational amplifier (U6) is simultaneously connected with one ends of a resistor (R17) and a resistor (R21);

the other end of the resistor (R21) is connected with the positive end of the operational amplifier (U8), the negative end of the operational amplifier (U8) is simultaneously connected with one end of the resistor (R20) and one end of the resistor (R23), and the other end of the resistor (R23) is connected with the output end of the operational amplifier (U8) and one end of the resistor R26; one end of a current sensor (S2) is connected with one end of a resistor (R19), the other end of the resistor (R19) is connected with the positive end of an operational amplifier (U7), the negative end of the operational amplifier (U7) is connected with one end of a resistor (R18) and one end of a resistor (R22) together, and the other end of the resistor (R22) is connected with the output end of the operational amplifier (U7), one end of a resistor (R24), the collector of a triode (Q3), one end of a capacitor (C2) and one end of the resistor (R28) simultaneously;

the negative end of an operational amplifier (U9) is connected with the other end of a resistor (R24) and one end of a resistor (R27) together, the positive end of the operational amplifier (U9) is connected with the other end of a resistor (R26), the output end of the operational amplifier (U9) is connected with the other end of a resistor (R27) and the base of a triode (Q3) together, the emitter of the triode (Q3) is connected with the output end of the operational amplifier (U8), the other end of a capacitor (C2) is connected with one end of a resistor (R29) together, the other end of the resistor (R28) is connected with the negative end of the operational amplifier (U10) and one end of a resistor (R30) together, the other end of a resistor (R8) is connected with the positive end of the operational amplifier (U10), and the output end of the operational amplifier (U10) is connected with the other end of the resistor (R63.

8. The system of claim 4, wherein the voltage and current second stage protection circuit comprises a resistor (R31), a resistor (R32), a resistor (R33), a resistor (R34), a resistor (R35), a resistor (R36), a resistor (R37), a resistor (R38), a resistor (R39), a resistor (R40), a resistor (R41), an operational amplifier (U11), an operational amplifier (U12), an operational amplifier (U13), a transistor (Q4), a transistor (Q5), an electrolytic capacitor (C3), a diode (D1), a diode (D2), and a diode (D3); wherein the content of the first and second substances,

an emitter of the triode (Q4) is connected with a power supply voltage, one end of the resistor (R35) and one end of the electrolytic capacitor (C3) together, a base of the triode (Q4) is connected with an output end of the operational amplifier (U12), a negative end of the operational amplifier (U12) is connected with a collector of the triode (Q4) and one end of the resistor (R36), a positive end of the operational amplifier (U12) is connected with one end of the resistor (R38), the other end of the electrolytic capacitor (C3) and one end of the diode (D1) together, the other end of the diode (D1) is connected with the other end of the resistor (R35), a base of the triode (Q5) is connected with the other end of the resistor (R38) and one end of the resistor (R37) together, a collector of the triode (Q5) is connected with the other end of the resistor (R37) and the other end of the resistor (R36) together, and an emitter of the triode (Q5) is connected with one end of the.

The other end of the resistor (R39) is connected with the negative end of the operational amplifier (U13), the positive end of the operational amplifier (U13) is connected with one end of the resistor (R40), and the output end of the operational amplifier (U13) is connected with the diode (D2), the diode (D3), the resistor (R41) and the main controller circuit module.

9. The system of claim 1, further comprising: the device comprises a filtering and surge limiting circuit, a display circuit module and a human-computer interaction module.

Technical Field

The invention relates to the technical field of motors, in particular to a closed-loop power supply system of a direct current motor.

Background

With the development of modern power electronic technology and micro control technology, the brushless direct current motor has gradually replaced the direct current motor in many application fields, and is a product integrating power electronic current transformation technology, micro control technology, motor control technology and intelligent control technology; the brushless direct current motor adopts high-magnetic energy rare earth permanent magnet materials, has the characteristics of small volume, light weight, high efficiency, small loss and the like, and is widely applied to the industrial fields of aviation, aerospace, machinery, automobiles and the like and the civil fields of household appliances and the like; when developing and developing direct current motor controllers with different voltage levels, the following problems exist: a first different motor controller, which needs to provide different power supply issues; secondly, overvoltage and overcurrent occur during the operation of the motor, but the motor is pulled down, so that the motor can continue to operate and the problem of error protection is solved; thirdly, the motor is pulled down when overvoltage and overcurrent occur during operation, and the motor or the controller is damaged because the motor cannot continuously operate; fourthly, the power circuit can not feed back the rotating speed of the motor, so that the problem of rotating speed error exists in debugging. Therefore, a dc power system with adjustable voltage level, overcurrent protection, voltage protection, and closed-loop rotation speed is needed.

Disclosure of Invention

In view of the above, the present invention provides a closed loop power supply system for a dc motor that overcomes, or at least partially solves, the above problems.

According to an aspect of the present invention, there is provided a closed loop power supply system for a dc motor, comprising:

the rectifier circuit module is connected with the alternating current and rectifies the input alternating current;

the Buck-Boost circuit module is connected with the rectifying circuit module;

the direct current output circuit module is connected with the Buck-Boost circuit module;

the main controller circuit module is connected with the Buck-Boost circuit module and used for controlling the Buck-Boost circuit module to rectify alternating current into direct current so as to provide power for the direct current motor through the direct current output circuit module;

the detection circuit module is connected with the main controller circuit module and is used for detecting the current, the voltage and the rotating speed of the direct current motor;

and the protection circuit module is connected between the main controller circuit module and the detection circuit module to realize the protection of the current, the voltage and the rotating speed of the direct current motor.

Optionally, the protection circuit module includes: a direct current output voltage and current detection circuit and a voltage first-stage protection circuit;

the voltage first-stage protection circuit is used for acquiring direct-current output voltage and direct-current output voltage of the current detection circuit in real time, generating a signal in a linear relation with the direct-current output voltage, adjusting output reference voltage of the direct-current output voltage according to the level of the direct-current output voltage, and then generating a voltage calibration signal of a first set threshold value by comparing the reference signal with a voltage signal.

Optionally, the protection circuit module further includes:

a current first stage protection circuit comprising: a reference current first circuit, a signal processing circuit and a signal forming first circuit;

the direct current output voltage and current detection circuit obtains the voltage and current output by the detection circuit module, and meanwhile, the reference output voltage first circuit and the reference current first circuit generate reference voltage and reference current, and then the signals are output after being compared and amplified through the signal processing circuit.

Optionally, the protection circuit module further includes: and the voltage and current second-stage protection circuit is used for detecting signals output by the voltage first-stage protection circuit and the current first-stage protection circuit in real time and forming a second set threshold power-off protection signal.

Optionally, the voltage first stage protection circuit comprises a reference output voltage first circuit;

the voltage and current second stage protection circuit includes: a reference voltage second circuit, a signal forming second circuit and a main control circuit;

when the first circuit of the reference output voltage generates no signal or the formed signal is smaller than a first set threshold value, the current output of the direct current motor is normal;

when a reference output voltage first circuit forms a signal and is greater than a first set threshold value, transmitting the signal to the main control circuit;

when the reference output voltage first circuit forms a signal and is greater than a second set threshold value, the reference voltage second circuit and the signal form a first circuit output signal, the signal forms a second circuit to process, and then the output signal is transmitted to the main control circuit, namely a power-off signal is generated.

Optionally, the voltage first stage protection circuit: the circuit comprises a voltage sensor (S1), a resistor (R1), a resistor (R2), a resistor (R3), a resistor (R4), a resistor (R5), a resistor (R6), a resistor (R7), a resistor (R8), a resistor (R9), a resistor (R10), a resistor (R11), a resistor (R12), a resistor (R13), a resistor (R14), an operational amplifier (U1), an operational amplifier (U2), an operational amplifier (U3), an operational amplifier (U4), an operational amplifier (U5), a triode (Q1), a triode (Q2), a slide rheostat (RS1) and a capacitor (C1); wherein the content of the first and second substances,

one end of the resistor (R1) is connected with a power supply voltage, and the other end of the resistor (R1) is connected with one end of the slide rheostat (RS 1); the other end of the slide rheostat (RS1) is connected with the resistor (R2), and the middle end of the slide rheostat (RS1) is connected with the positive end of the operational amplifier (U1);

the other end of the resistor (R2) is connected with the ground end, the negative end and the output end of the operational amplifier (U1) are simultaneously connected with the resistor (R6), the other end of the resistor (R6) is connected with the positive end of the operational amplifier (U3), the negative end of the operational amplifier (U3) is connected with the resistor (R5) and the resistor (R8), and the other end of the resistor (R5) is connected with the ground;

the voltage sensor (S1) is connected with one end of a resistor (R4), the other end of the resistor (R4) is connected with the positive end of the operational amplifier (U2), one end of the resistor (R3) is grounded, the other end of the resistor (R3) is connected with the negative end of the operational amplifier (U2) and one end of the resistor (R7), the other end of the resistor (R8) is connected with the output end of the operational amplifier (U3), the emitter of the triode (Q2) and the resistor (R10), and the other end of the resistor (R10) is connected with the positive end of the operational amplifier (U4);

the output end of the operational amplifier (U2) is simultaneously connected with the other end of the resistor (R7), the emitter of the triode (Q1) and one end of the resistor (R9), and the other end of the resistor (R9) is simultaneously connected with one end of the resistor (R11) and the negative end of the operational amplifier (U4); the other end of the resistor (R11) is connected with the output end of the operational amplifier (U4), the base of the triode (Q1) and the base of the triode (Q2) at the same time, one end of the capacitor (C1) is connected with the collector of the triode (Q1) and one end of the resistor (R12) at the same time, the other end of the capacitor (C1) is connected with the collector of the triode (Q2) and one end of the resistor (R13), the other end of the resistor (R12) is connected with the negative end of the operational amplifier (U5) and one end of the resistor (R14), the other end of the resistor (R14) is connected with the output end of the operational amplifier (U5), and one end of the resistor (R13) is connected with the positive end of the operational amplifier (U5.

Optionally, the current first stage protection circuit includes: the current detection circuit comprises a current sensor (S2), a resistor (R15), a resistor (R16), a resistor (R17), a resistor (R18), a resistor (R19), a resistor (R20), a resistor (R21), a resistor (R22), a resistor (R23), a resistor (R24), a resistor (R25), a resistor (R26), a resistor (R27), a resistor (R28), a resistor (R29), a resistor (R30), an operational amplifier (U6), an operational amplifier (U7), an operational amplifier (U8), an operational amplifier (U9), an operational amplifier (U10), a triode (Q3), a slide rheostat (RS2) and a capacitor (C2);

one end of a sliding rheostat (RS2) is connected, the middle section of the ground is connected with one end of a resistor (R15), the other end of the resistor (R15) is simultaneously connected with one end of the resistor (R17) and the positive end of an operational amplifier (U6), the negative end of the operational amplifier (U6) is connected with one end of a resistor (R16), the other end of the resistor (R16) is grounded, and the output end of the operational amplifier (U6) is simultaneously connected with one ends of a resistor (R17) and a resistor (R21);

the other end of the resistor (R21) is connected with the positive end of the operational amplifier (U8), the negative end of the operational amplifier (U8) is simultaneously connected with one end of the resistor (R20) and one end of the resistor (R23), and the other end of the resistor (R23) is connected with the output end of the operational amplifier (U8) and one end of the resistor R26; one end of a current sensor (S2) is connected with one end of a resistor (R19), the other end of the resistor (R19) is connected with the positive end of an operational amplifier (U7), the negative end of the operational amplifier (U7) is connected with one end of a resistor (R18) and one end of a resistor (R22) together, and the other end of the resistor (R22) is connected with the output end of the operational amplifier (U7), one end of a resistor (R24), the collector of a triode (Q3), one end of a capacitor (C2) and one end of the resistor (R28) simultaneously;

the negative end of an operational amplifier (U9) is connected with the other end of a resistor (R24) and one end of a resistor (R27) together, the positive end of the operational amplifier (U9) is connected with the other end of a resistor (R26), the output end of the operational amplifier (U9) is connected with the other end of a resistor (R27) and the base of a triode (Q3) together, the emitter of the triode (Q3) is connected with the output end of the operational amplifier (U8), the other end of a capacitor (C2) is connected with one end of a resistor (R29) together, the other end of the resistor (R28) is connected with the negative end of the operational amplifier (U10) and one end of a resistor (R30) together, the other end of a resistor (R8) is connected with the positive end of the operational amplifier (U10), and the output end of the operational amplifier (U10) is connected with the other end of the resistor (R63.

Optionally, the voltage and current second-stage protection circuit comprises a resistor (R31), a resistor (R32), a resistor (R33), a resistor (R34), a resistor (R35), a resistor (R36), a resistor (R37), a resistor (R38), a resistor (R39), a resistor (R40), a resistor (R41), an operational amplifier (U11), an operational amplifier (U12), an operational amplifier (U13), a triode (Q4), a triode (Q5), an electrolytic capacitor (C3), a diode (D1), a diode (D2) and a diode (D3); wherein the content of the first and second substances,

an emitter of the triode (Q4) is connected with a power supply voltage, one end of the resistor (R35) and one end of the electrolytic capacitor (C3) together, a base of the triode (Q4) is connected with an output end of the operational amplifier (U12), a negative end of the operational amplifier (U12) is connected with a collector of the triode (Q4) and one end of the resistor (R36), a positive end of the operational amplifier (U12) is connected with one end of the resistor (R38), the other end of the electrolytic capacitor (C3) and one end of the diode (D1) together, the other end of the diode (D1) is connected with the other end of the resistor (R35), a base of the triode (Q5) is connected with the other end of the resistor (R38) and one end of the resistor (R37) together, a collector of the triode (Q5) is connected with the other end of the resistor (R37) and the other end of the resistor (R36) together, and an emitter of the triode (Q5) is connected with one end of the.

The other end of the resistor (R39) is connected with the negative end of the operational amplifier (U13), the positive end of the operational amplifier (U13) is connected with one end of the resistor (R40), and the output end of the operational amplifier (U13) is connected with the diode (D2), the diode (D3), the resistor (R41) and the main controller circuit module.

Optionally, the method further comprises: the device comprises a filtering and surge limiting circuit, a display circuit module and a human-computer interaction module.

The invention provides a closed-loop power supply system of a direct current motor, which can provide effective direct current voltages corresponding to different motor controllers and track and protect the voltages of the direct current voltages, can also carry out pull-down continuous operation or power failure double protection on the direct current voltages when overvoltage and overcurrent occur in the research and development process, can also carry out feedback tracking on the rotating speed of the motor, and has the advantages of quick response, high precision, anti-misoperation protection and the like of the protection of a used hardware circuit; therefore, a direct and reliable power supply system is provided for the research and development of different types of direct current motor controllers.

The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic diagram of a closed-loop power supply system of a DC motor according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a protection circuit module according to an embodiment of the present invention;

FIG. 3 shows a voltage first stage protection circuit schematic according to an embodiment of the invention;

FIG. 4 shows a current first stage protection circuit schematic according to an embodiment of the invention;

FIG. 5 shows a voltage and current second stage protection circuit schematic according to an embodiment of the invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As shown in fig. 1, an embodiment of the present invention provides a closed-loop power supply system for a dc motor, including: a rectifier circuit module 10 which is connected to an alternating current and rectifies the input alternating current; the Buck-Boost circuit module 20 is connected with the rectifying circuit module 10; a dc output circuit module 30 connected to the Buck-Boost circuit module 20; a main controller circuit module 40 connected to the Buck-Boost circuit module 20, configured to control the Buck-Boost circuit module 20 to rectify an ac current into a dc current, so as to provide a power source for the dc motor through the dc output circuit module 30; the detection circuit module 50 is connected with the main controller circuit module 40 and is used for detecting the current, the voltage and the rotating speed of the direct current motor; and the protection circuit module 60 is connected between the main controller circuit module 40 and the detection circuit module 50, and is used for protecting the current, the voltage and the rotating speed of the direct current motor.

In addition to the above description, the dc motor closed loop power system may further include a filtering and surge limiting circuit 70, a display circuit module 80, and a human-computer interaction module 90. The direct current motor closed-loop power supply system provided by the embodiment of the invention has certain universality, and can provide a direct current power supply system with the functions of adjustable voltage grade, overcurrent protection, voltage protection, rotating speed closed-loop and the like aiming at direct current motor controllers with different voltage grades.

In an alternative embodiment of the present invention, as shown in fig. 2, the protection circuit module 60 includes: a dc output voltage and current detection circuit 61 and a voltage first stage protection circuit 62.

The voltage first-stage protection circuit 62 is configured to obtain the dc output voltage and the dc output voltage of the current detection circuit 61 in real time, generate a signal having a linear relationship with the dc output voltage, adjust an output reference voltage according to a level of the dc output voltage, and then generate a voltage calibration signal with a first set threshold by comparing the reference signal with the voltage signal.

With continued reference to fig. 2, the protection circuit module 60 further includes: a current first stage protection circuit 63, comprising: a reference current first circuit, a signal processing circuit and a signal forming first circuit; the dc output voltage and current detection circuit 61 obtains the voltage and current output by the detection circuit module 50, and the reference output voltage first circuit and the reference current first circuit generate the reference voltage and the reference current, and then the signals are compared and amplified by the signal processing circuit and then output.

With continued reference to fig. 2, the protection circuit module 60 further includes: and the voltage and current second-stage protection circuit 64 is used for detecting signals output by the voltage first-stage protection circuit 62 and the current first-stage protection circuit 63 in real time and forming a second set threshold power-off protection signal. The voltage first stage protection circuit 62 comprises a reference output voltage first circuit; the voltage and current second stage protection circuit 64 includes: a reference voltage second circuit, a signal forming second circuit and a main control circuit; when the first circuit of the reference output voltage generates no signal or the formed signal is smaller than a first set threshold value, the current output of the direct current motor is normal; when a reference output voltage first circuit forms a signal and is greater than a first set threshold value, transmitting the signal to the main control circuit; when the reference output voltage first circuit forms a signal and is greater than a second set threshold value, the reference voltage second circuit and the signal form a first circuit output signal, the signal forms a second circuit to process, and then the output signal is transmitted to the main control circuit, namely a power-off signal is generated.

That is, the dc output voltage and current detection circuit 61 obtains the output voltage and current, and the reference output voltage first circuit and the reference current first circuit generate the reference voltage and the reference current, and then the signal processing circuit processes the reference voltage and the reference current in three ways after the signal processing circuit processes the reference voltage and the reference current;

the first method comprises the following steps: the first circuit of the reference output voltage forms a signal without signal generation or is smaller than a threshold value 1 (which can be set according to actual requirements), namely the output voltage basically tracks the set voltage (or the current output is normal);

secondly, if the signal is formed by the signal and the first circuit forming signal is larger than the threshold value 1, the signal is transmitted to the main control circuit, and a voltage calibration signal (or a current limiting pull-down signal) is generated;

and if the first circuit forming signal is formed by the signal and is larger than the threshold value 2 (can be set according to actual requirements), the output signal is processed by the second circuit forming signal through the reference voltage second circuit and the signal forming circuit, and then the output signal is transmitted to the main control circuit, namely, a power-off signal is generated.

As shown in fig. 3, the voltage first-stage protection circuit 62 includes a voltage sensor (S1), a resistor (R1), a resistor (R2), a resistor (R3), a resistor (R4), a resistor (R5), a resistor (R6), a resistor (R7), a resistor (R8), a resistor (R9), a resistor (R10), a resistor (R11), a resistor (R12), a resistor (R13), a resistor (R14), an operational amplifier (U1), an operational amplifier (U2), an operational amplifier (U3), an operational amplifier (U4), an operational amplifier (U5), a triode (Q1), a triode (Q2), a slide rheostat (RS1), and a capacitor (C1).

One end of a resistor (R1) of the reference voltage first circuit is connected with a power supply voltage VCC, and the other end of the resistor is connected with one end of a slide rheostat (RS 1); the other end of the slide rheostat (RS1) is connected with the resistor (R2), and the middle end of the slide rheostat (RS1) is connected with the positive end of the operational amplifier (U1); the other end of the resistor (R2) is connected with the ground end, the negative end and the output end of the operational amplifier (U1) are simultaneously connected with the resistor (R6), the other end of the resistor (R6) is connected with the positive end of the operational amplifier (U3), the negative end of the operational amplifier (U3) is connected with the resistor (R5) and the resistor (R8), and the other end of the resistor (R5) is connected with the ground.

The signal processing circuit voltage sensor (S1) is connected with one end of a resistor (R4), the other end of the resistor (R4) is connected with the positive end of an operational amplifier (U2), one end of the resistor (R3) is grounded, the other end of the resistor (R3) is connected with the negative end of the operational amplifier (U2) and one end of a resistor (R7), the other end of the resistor (R8) is connected with the output end of the operational amplifier (U3), the emitter of a triode (Q2) and the resistor (R10), and the other end of the resistor (R10) is connected with the positive end of the operational amplifier (U4);

the output end of an operational amplifier (U2) of the signal forming first circuit is simultaneously connected with the other end of a resistor (R7), the emitter of a triode (Q1) and one end of a resistor (R9), and the other end of the resistor (R9) is simultaneously connected with one end of a resistor (R11) and the negative end of an operational amplifier (U4); the other end of the resistor (R11) is connected with the output end of the operational amplifier (U4), the base of the triode (Q1) and the base of the triode (Q2) at the same time, one end of the capacitor (C1) is connected with the collector of the triode (Q1) and one end of the resistor (R12) at the same time, the other end of the capacitor (C1) is connected with the collector of the triode (Q2) and one end of the resistor (R13), the other end of the resistor (R12) is connected with the negative end of the operational amplifier (U5) and one end of the resistor (R14), the other end of the resistor (R14) is connected with the output end of the operational amplifier (U5), and one end of the resistor (R13) is connected with the positive end of the operational amplifier (U5.

That is, the voltage first-stage protection circuit 62 detects the dc output voltage in real time and generates a signal having a linear relationship with the output voltage, while adjusting its output reference voltage according to the voltage level, and then generates a threshold 1 voltage calibration signal by comparing the reference signal with the voltage signal.

As shown in fig. 4, the current first-stage protection circuit 63 includes: the current detection circuit comprises a current sensor (S2), a resistor (R15), a resistor (R16), a resistor (R17), a resistor (R18), a resistor (R19), a resistor (R20), a resistor (R21), a resistor (R22), a resistor (R23), a resistor (R24), a resistor (R25), a resistor (R26), a resistor (R27), a resistor (R28), a resistor (R29), a resistor (R30), an operational amplifier (U6), an operational amplifier (U7), an operational amplifier (U8), an operational amplifier (U9), an operational amplifier (U10), a triode (Q3), a slide rheostat (RS2) and a capacitor (C2);

one end of a sliding variable resistor (RS2) of the first reference current circuit is connected, the middle section of the ground is connected with one end of a resistor (R15), the other end of the resistor (R15) is simultaneously connected with one end of the resistor (R17) and the positive end of an operational amplifier (U6), the negative end of the operational amplifier (U6) is connected with one end of a resistor (R16), the other end of the resistor (R16) is grounded, and the output end of the operational amplifier (U6) is simultaneously connected with one ends of a resistor (R17) and a resistor (R21);

the other end of a resistor (R21) of the signal processing circuit is connected with the positive end of an operational amplifier (U8), the negative end of the operational amplifier (U8) is simultaneously connected with one end of a resistor (R20) and one end of a resistor (R23), and the other end of the resistor (R23) is connected with the output end of an operational amplifier (U8) and one end of a resistor R26; one end of a current sensor (S2) is connected with one end of a resistor (R19), the other end of the resistor (R19) is connected with the positive end of an operational amplifier (U7), the negative end of the operational amplifier (U7) is connected with one end of a resistor (R18) and one end of a resistor (R22) together, and the other end of the resistor (R22) is connected with the output end of the operational amplifier (U7), one end of a resistor (R24), the collector of a triode (Q3), one end of a capacitor (C2) and one end of the resistor (R28) simultaneously;

the negative end of an operational amplifier (U9) of a signal forming first circuit is connected with the other end of a resistor (R24) and one end of a resistor (R27) together, the positive end of the operational amplifier (U9) is connected with the other end of the resistor (R26), the output end of the operational amplifier (U9) is connected with the other end of a resistor (R27) and the base of a triode (Q3) together, the emitter of the triode (Q3) is connected with the output end of an operational amplifier (U8), the other end of a capacitor (C2) is connected with one end of a resistor (R29) together, the other end of the resistor (R28) is connected with the negative end of an operational amplifier (U10) and one end of a resistor (R30) together, the other end of a resistor (R29) is connected with the positive end of an operational amplifier (U10), and the output end of the operational amplifier (U10) is connected with the other end of a resistor (R30.

The voltage and current second-stage protection circuit is used for detecting signals output by the voltage and current I stage in real time and forming threshold 2 power-off protection signals. As shown in fig. 5, the voltage and current second-stage protection circuit 64 includes a resistor (R31), a resistor (R32), a resistor (R33), a resistor (R34), a resistor (R35), a resistor (R36), a resistor (R37), a resistor (R38), a resistor (R39), a resistor (R40), a resistor (R41), an operational amplifier (U11), an operational amplifier (U12), an operational amplifier (U13), a triode (Q4), a triode (Q5), an electrolytic capacitor (C3), a diode (D1), a diode (D2), and a diode (D3); wherein the content of the first and second substances,

an emitter of a triode (Q4) of the reference voltage second circuit is connected with a power supply voltage, one end of a resistor (R35) and one end of an electrolytic capacitor (C3) together, a base electrode of the triode (Q4) is connected with an output end of an operational amplifier (U12), a negative end of the operational amplifier (U12) is connected with a collector of the triode (Q4) and one end of the resistor (R36), a positive end of the operational amplifier (U12) is connected with one end of a resistor (R38), the other end of the electrolytic capacitor (C3) is connected with one end of a diode (D1) together, the other end of the diode (D1) is connected with the other end of a resistor (R35), the base of a triode (Q5) is connected with the other end of a resistor (R38) and one end of a resistor (R37) together, the collector of the triode (Q5) is connected with the other end of the resistor (R37) and the other end of a resistor (R36) together, and the emitter of the triode (Q5) is connected with one end of a resistor (R39).

The other end of a resistor (R39) of the signal forming second circuit is connected with the negative end of an operational amplifier (U13), the positive end of the operational amplifier (U13) is connected with one end of a resistor (R40), and the output end of the operational amplifier (U13) is connected with a diode (diode D2), a diode (D3), a resistor (R41) and the main controller circuit module 40.

For other modules of the dc motor closed-loop power supply system provided in this embodiment, modules are commonly used in the dc motor power supply system, which belongs to the conventional technology and are not described herein again.

The embodiment of the invention provides a direct current motor closed-loop power supply system, which can provide effective direct current voltages corresponding to different motor controllers and track and protect the voltages of the direct current voltages by arranging a protection circuit module 60, can also carry out pull-down continuous operation or power failure double protection when overvoltage and overcurrent occur in the research and development process, can also carry out feedback tracking on the rotating speed of a motor, and has the advantages of quick response, high precision, anti-misoperation protection and the like of the used hardware circuit protection; therefore, a direct and reliable power supply system is provided for the research and development of different types of direct current motor controllers.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.