阅读说明：本技术 一种基于响应时差的开关控制电路 (Switch control circuit based on response time difference ) 是由 曹阔 王德和 于 2020-12-31 设计创作，主要内容包括：本发明公开了一种基于响应时差的开关控制电路,包括电控器件K1、电阻R1、二极管D1、二极管D2、电容EC1、二极管D3、电阻R2、光电三极管U1、电阻R4、电阻R5、电容EC2、二极管D4、二极管D5和电容C1,所述电控器件K1的第一端与电源输入端的第一端连接,电控器件K1的第三端与输出端OUT连接。本发明在控制信号有效时通过控制信号来保护负载,当控制信号失效时通过自身电路结构及电气原理驱动电控器件来切断保护负载,因此本发明做到了对负载的有效保护,极大降低了危险工况的发生。(The invention discloses a switch control circuit based on response time difference, which comprises an electric control device K1, a resistor R1, a diode D1, a diode D2, a capacitor EC1, a diode D3, a resistor R2, a phototriode U1, a resistor R4, a resistor R5, a capacitor EC2, a diode D4, a diode D5 and a capacitor C1, wherein a first end of the electric control device K1 is connected with a first end of a power supply input end, and a third end of the electric control device K1 is connected with an output end OUT. The load is protected by the control signal when the control signal is effective, and the electric control device is driven by the circuit structure of the control signal and the electric principle to cut off the protection load when the control signal is invalid, so that the load is effectively protected, and the occurrence of dangerous working conditions is greatly reduced.)

1. A switch control circuit based on response time difference comprises an electric control device K1, a resistor R1, a diode D1, a diode D2, a capacitor EC1, a diode D3, a resistor R2, a phototriode U1, a resistor R4, a resistor R5, a capacitor EC2, a diode D4, a diode D5 and a capacitor C1, and is characterized in that a first end of the electric control device K1 is connected with a first end of a power supply input end, a third end of the electric control device K1 is connected with an output end OUT, a cathode and an anode of the diode D1 are connected with a fourth end and a fifth end of the electric control device K1 in parallel, a fourth end of the electric control device K1 is connected with a second end of the resistor R1, a first end of the resistor R1 is connected with a cathode of the diode D1 and an anode of the capacitor EC1, an anode of the diode D1 is connected with a cathode of the diode D1 and a first end of a fuse F1 in series, the second end of the power input end is connected with the anode of the diode D2, the cathode of the capacitor EC1 and the fifth end of the electronic control device K1, the first end of the resistor R2 is connected with the fourth end of the electronic control device K1, the first end of the phototransistor U1 is connected with the second end of the resistor R3, the first end of the resistor R3 is connected with the cathode of the diode D4, the anode of the capacitor EC2 and the second end of the resistor R4, the anode of the diode D4 is connected with the cathode of the diode D5 and the second end of the capacitor C1, the first end of the capacitor C1 is connected with the control signal, and the anode of the diode D5, the cathode of the capacitor EC2, the second end of the resistor R4 and the second end of the phototransistor U1 are connected with the second end of the input end of the control signal system.

2. The response-time difference based switch control circuit of claim 1, wherein the output terminal OUT is configured to be connected to a load.

3. The response time difference-based switch control circuit according to claim 1, wherein the electric control device K1 is a normally closed relay.

4. The response time difference based switch control circuit according to claim 1, wherein the parameter of the electrically controlled device K1 is DC24V 1.6.6K/2.8K internal resistance.

5. The response time difference-based switch control circuit according to claim 1, wherein a capacitance CX1 is connected in parallel to two ends of the resistor R1 to form a resistance-capacitance voltage reduction module.

6. A non-isolation type switch control circuit based on response time difference comprises a power supply input end, an output end, a resistor R1 wire, a resistor R1, a diode D1, a diode D2, a capacitor EC1, an electric control device K1, a diode D3, a resistor R3, a triode V3, a resistor R3, a triode Q3, a resistor R3, a capacitor EC 3, a diode D3, a capacitor C3 and a control signal input end, and is characterized in that a first end of the electric control device K3 is connected with a first end of the power supply input end, a third end of the electric control device K3 is connected with the output end, a cathode, an anode of the diode D3 and a 3 pole of the triode V3 are connected with a fourth end and a fifth end of the electric control device K3 in parallel, a fourth end of the electric control device K3 is connected with a second end of the resistor R3, a first end of the resistor R3 is connected with a cathode of the diode D3 and an anode of the capacitor EC 3, and a cathode of the diode D3 are, The resistor R1 is connected with the first end of the power input end after being wired, the second end of the power input end is respectively connected with the anode of the diode D2, the cathode of the capacitor EC1 and the fifth end of the electric control device K1, the B pole of the triode V1 is connected with the second end of the resistor R6, the first end of the resistor R6 is connected with the C pole of the triode Q2, the first end of the resistor R3 is connected with the B pole of the triode Q2 and the first end of the resistor R5, the second end of the resistor R3 is connected with the cathode of the diode D4, the anode of the capacitor EC2 and the first end of the resistor R4, the anode of the diode D4 is connected with the cathode of the diode D5 and the second end of the capacitor C1, the anode of the diode D5, the cathode of the capacitor EC2, the second end of the resistor R6, the second end of the resistor R4 and the E pole of the triode Q1 are connected with the second end of the power input end.

7. The response time difference-based switch control circuit according to claim 6, wherein a resistor R1 is connected in parallel with a capacitor CX1 at two ends to form a resistor-capacitor voltage-reducing module.

8. The response time difference based switch control circuit of claim 6, wherein the transistor Q1 and the transistor Q2 are replaced by MOS transistors.

Technical Field

The invention relates to the technical field of protection switches, in particular to a switch control circuit based on response time difference.

Background

When circuit control boards of various power supply equipment, devices and living electric appliances are affected by abnormal conditions, such as strong interference, impact, program runaway or external stress clamping, control failure can be caused, circuit loads cannot be controlled according to normal functions, and therefore dangerous results are caused.

The current protection circuit in the market provides a circuit module which gives a single extra signal control, and the module adds a protection function to electric equipment, but ignores a potential risk that the protection function of the module fails when the signal of the protection circuit is abnormal. The invention provides a reliable control signal, so that the protection function can be reliably provided no matter whether the control signal of the protection circuit module fails or not, and the cost of the protection circuit in the current market is relatively high, so that a certain cost threshold is provided for practical application.

In view of the above circumstances, how to more reliably control the power supply portion or the load portion and find a scheme with higher cost performance becomes a focus problem which needs to be solved urgently in the market.

The invention provides a product which adopts an isolation element and is applied to electric equipment or electric appliances, and can automatically disconnect protection when abnormal overtime work such as load works.

Disclosure of Invention

The present invention is directed to a switch control circuit based on a response time difference, so as to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

a switch control circuit based on response time difference comprises an electric control device K1, a resistor R1, a diode D1, a diode D2, a capacitor EC1, a diode D3, a resistor R2, a phototriode U1, a resistor R4, a resistor R5, a capacitor EC2, a diode D4, a diode D5 and a capacitor C5, wherein a first end of the electric control device K5 is connected with a first end of a power supply input end, a third end of the electric control device K5 is connected with an output end OUT, a cathode, an anode of the diode D5, a fourth end and a third end of the phototriode U5 are connected with a fourth end and a fifth end of the electric control device K5 in parallel, a fourth end of the electric control device K5 is connected with a second end of the resistor R5, a first end of the resistor R5 is connected with a cathode of the diode D5 and an anode of the capacitor EC 5, a first end of the diode D5 is connected with an anode of the diode D5, a fuse F is connected with a second end of the power supply input end of the diode D36, The cathode of the capacitor EC1 is connected with the fifth end of the electric control device K1, the first end of the resistor R2 is connected with the fourth end of the electric control device K1, the second end of the first end of the phototransistor U1 is connected with the second end of the resistor R3, the first end of the resistor R3 is connected with the cathode of the diode D4, the anode of the capacitor EC2 and the second end of the resistor R4, the anode of the diode D4 is connected with the cathode of the diode D5 and the second end of the capacitor C1, the first end of the capacitor C1 is connected with a control signal, and the anode of the diode D5, the cathode of the capacitor EC2, the second end of the resistor R4 and the second end of the phototransistor U1 are connected with the second end of the input end of the control signal.

As a further scheme of the invention: the output terminal OUT is used for connecting with a load.

As a further scheme of the invention: the electric control device K1 is a normally closed relay.

As a further scheme of the invention: the parameter of the electric control device K1 is DC24V 1.6.6K/2.8K internal resistance.

As a further scheme of the invention: two ends of the resistor R1 are connected with a capacitor CX1 in parallel to form a resistance-capacitance voltage reduction module.

A non-isolation type switch control circuit based on response time difference comprises a power supply input end, an output end, a resistor R1 wire, a resistor R1, a diode D1, a diode D2, a capacitor EC1, an electric control device K1, a diode D3, a resistor R3, a triode V3, a resistor R3, a triode Q3, a resistor R3, a capacitor EC 3, a diode D3, a capacitor C3 and a control signal input end, and is characterized in that a first end of the electric control device K3 is connected with a first end of the power supply input end, a third end of the electric control device K3 is connected with the output end, a cathode, an anode of the diode D3 and a 3 pole of the triode V3 are connected with a fourth end and a fifth end of the electric control device K3 in parallel, a fourth end of the electric control device K3 is connected with a second end of the resistor R3, a first end of the resistor R3 is connected with a cathode of the diode D3 and an anode of the capacitor EC 3, and a cathode of the diode D3 are, The resistor R1 is connected with the first end of the power input end after being wired, the second end of the power input end is respectively connected with the anode of the diode D2, the cathode of the capacitor EC1 and the fifth end of the electric control device K1, the B pole of the triode V1 is connected with the second end of the resistor R6, the first end of the resistor R6 is connected with the C pole of the triode Q2, the first end of the resistor R3 is connected with the B pole of the triode Q2 and the first end of the resistor R5, the second end of the resistor R3 is connected with the cathode of the diode D4, the anode of the capacitor EC2 and the first end of the resistor R4, the anode of the diode D4 is connected with the cathode of the diode D5 and the second end of the capacitor C1, the anode of the diode D5, the cathode of the capacitor EC2, the second end of the resistor R6, the second end of the resistor R4 and the E pole of the triode Q1 are connected with the second end of the power input end.

As a further scheme of the invention: two ends of the resistor R1 are connected with a capacitor CX1 in parallel to form a resistance-capacitance voltage reduction module.

As a further scheme of the invention: the transistor Q1 and the transistor Q2 are replaced by MOS transistors.

Compared with the prior art, the invention has the beneficial effects that: the load is protected by the control signal when the control signal is effective, and the electric control device is driven by the circuit structure of the control signal and the electric principle to cut off the protection load when the control signal is invalid, so that the load is effectively protected, and the occurrence of dangerous working conditions is greatly reduced.

Drawings

Fig. 1 is a schematic diagram of a resistance step-down optical coupling isolation type circuit in embodiment 1.

Fig. 2 is a schematic diagram of a resistance-capacitance step-down optical coupling isolation type circuit in embodiment 1.

Fig. 3 is a circuit diagram of an independent signal switch.

Fig. 4 is a schematic diagram of a resistive buck triode isolation type circuit of embodiment 2.

Fig. 5 is a schematic diagram of a resistance-capacitance buck triode isolation type circuit in embodiment 2.

Fig. 6 is a schematic circuit diagram of an isolated type of the resistance step-down MOS transistor in embodiment 2.

Fig. 7 is a schematic circuit diagram of an isolated resistance-capacitance step-down MOS transistor in embodiment 2.

Fig. 8 is a diagram of a product case of the design.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, embodiment 1: in the embodiment of the invention, a switching control circuit based on a response time difference comprises an electric control device K1, a resistor R1, a diode D1, a diode D2, a capacitor EC1, a diode D3, a resistor R2, a phototriode U1, a resistor R4, a resistor R5, a capacitor EC2, a diode D4, a diode D5 and a capacitor C1, wherein a first end of the electric control device K1 is connected with a first end of a power supply input end, a third end of the electric control device K1 is connected with an output end OUT, a cathode, an anode of the diode D1 and a fourth end and a third end of the phototriode U1 are connected in parallel with a fourth end and a fifth end of the electric control device K1, a fourth end of the electric control device K1 is connected with a second end of the resistor R1, a first end of the resistor R1 is connected with a cathode of the diode D1 and an anode of the capacitor EC1, an anode of the diode D1 is connected with a cathode of the diode D1 and a fuse R1, and a first, the second end of the power input end is connected with the anode of the diode D2, the cathode of the capacitor EC1 and the fifth end of the electronic control device K1, the first end of the resistor R2 is connected with the fourth end of the electronic control device K1, the second end of the first end of the resistor R3 of the phototransistor U1 is connected, the first end of the resistor R3 is connected with the cathode of the diode D4, the anode of the capacitor EC2 and the second end of the resistor R4, the anode of the diode D4 is connected with the cathode of the diode D5 and the second end of the capacitor C1, the first end of the capacitor C1 is connected with the control signal, and the anode of the diode D5, the cathode of the capacitor EC2, the second end of the resistor R4 and the second end of the phototransistor U1 are connected with the second end of the input end of the control signal.

The output terminal OUT is for connection to a load. The electric control device K1 is a normally closed relay. The parameter of the electric control device K1 is DC24V 1.6.6K/2.8K internal resistance.

The switch control circuit based on the response time difference can be arranged on a circuit board, and the protection circuit can also be arranged in the circuit board of a power supply or a controller of an electric appliance. The trigger signal of the protection circuit can be output and controlled by the main control loop, and the protection circuit can also be made into an independent module containing the self-trigger signal. The controller can be a single chip microcomputer or other circuits capable of starting the phototriode U1 to work.

The working flow of the protection circuit is as follows: 1, the protection circuit and the protected circuit are connected in parallel to the rear end of the alternating current trigger switch, and the protected load is connected in series to an output loop of an electric control device K1. 2, electrifying, enabling the protection circuit and the protected circuit to work simultaneously, enabling the protected circuit to give out a control signal, enabling the phototriode U1 to be conducted, and enabling the two ends of the electric control device K1 to be short-circuited when the mechanical switch is electrified and is not triggered to act because the speed of the electronic switch is microsecond and the speed of the mechanical switch is 10ms, so that the circuit of the electronic switch part is already conducted, and a load connected with an output loop of the electric control device K1 in series works normally. 3, in the normal working state, the normal working time t1 and t1 of the protected circuit are timed, the main control finishes controlling the load, and the running time t2 of the protection circuit is more than or equal to t 1. 4: when the protected circuit works beyond the normal working time t1, the master control loses effective control over the load, at the moment, the protection circuit starts to work at the set time t2, and the photoelectric triode U1 is closed, so that the electric control device K1 is driven by the circuit to actively cut off the load connected in series, and the effect of protecting the load is achieved. 5: when the main control logic device of the main control loop fails, the driving signal of the protection circuit is driven by the PWM coupling, so that the phototriode U1 cannot be driven, namely, the electric control device K1 is driven by the circuit to actively cut off the loads connected in series at the initial power-on time, and the effect of protecting the loads is achieved.

As shown in fig. 2, a capacitance CX1 is connected in parallel to two ends of the resistor R1 to form a resistance-capacitance voltage-reducing module.

As shown in fig. 3, the switch control circuit protection control signal based on the response time difference is an independent functional module from the protection circuit itself, and the module can function independently and be widely applied to equipment and electric appliances.

The protection principle is as follows: 1, the protection circuit and the protected circuit are connected in parallel to the rear end of the alternating current trigger switch, and the protected load is connected in series to an output loop of an electric control device K1. 2, electrifying, enabling the protection circuit and the protected circuit to work simultaneously, enabling the protection circuit to give out a control signal to enable the phototriode U1 to be conducted, wherein the speed of the electronic switch is microsecond level, and the speed of the mechanical switch is 10ms level, so that when the mechanical switch is not triggered to act after being electrified, the circuit of the electronic switch part is already conducted, and then two ends of the electric control device K1 are short-circuited, and therefore a load connected with an output loop of the electric control device K1 in series works normally. 3, in the normal working state, the normal working time t1 and t1 of the protected circuit are timed, the main control finishes controlling the load, and the running time t2 of the protection circuit is more than or equal to t 1. 4: when the protected circuit works beyond the normal working time t1 and the master control loses effective control over the load, the protection circuit starts to work at the set time t2, and the photoelectric triode U1 is closed, so that the electric control device K1 is driven by the circuit to actively cut off the load connected in series, and the effect of protecting the load is achieved. 5: when the control signal of the protection circuit is used, the drive signal of the protection circuit is driven by the PWM coupling, so that the phototriode U1 cannot be driven, that is, the electric control device K1 is driven by the circuit to actively cut off the load connected in series at the initial power-on time, thereby protecting the load.

Example 2: the difference from embodiment 1 is that a switching transistor is used to replace the phototransistor U1, as shown in fig. 4, a non-isolation type switching control circuit based on response time difference includes a power input terminal, an output terminal, a resistor R1 wire, a resistor R1, a diode D1, a diode D2, a capacitor EC1, an electronic control device K1, a diode D3, a resistor R2, a transistor V1, a resistor R3, a transistor Q1, a resistor R4, a capacitor EC 4, a diode D4, a capacitor C4, and a control signal input terminal, wherein a first terminal of the electronic control device K4 is connected to the first terminal of the power input terminal, a third terminal of the electronic control device K4 is connected to the output terminal, a cathode, an anode of the diode D4, and a 4 pole of the transistor V4 are connected in parallel to the fourth terminal and the fifth terminal of the electronic control device K4, a fourth terminal of the electronic control device K4 is connected to a second terminal of the resistor R4, a cathode of the diode e 4 is connected to a cathode of the diode e 4, the anode of the diode D1 is connected to the cathode of the diode D2, and is connected in series with the resistor R1 and the resistor R1, and then is connected to the first end of the power input terminal, the second end of the power input terminal is connected to the anode of the diode D2, the cathode of the capacitor EC1, and the fifth end of the electronic control device K1, the B-pole of the transistor V1 is connected to the second end of the resistor R6, the first end of the resistor R6 is connected to the C-pole of the transistor Q2, the first end of the resistor R3 is connected to the B-pole of the transistor Q2 and the first end of the resistor R5, the second end of the resistor R3 is connected to the cathode of the diode D4, the anode of the capacitor EC2, and the first end of the resistor R4, the anode of the diode D4, the second end of the capacitor C1 is connected, the anode of the diode D5, the cathode of the capacitor EC2, the second end of the resistor R6, the second end of the resistor R4 and the E pole of the triode Q1 are connected with the second end of the power input end, and the first end of the capacitor C1 is connected with a control signal.

The output terminal OUT is for connection to a load. The electric control device K1 is a normally closed relay. The parameter of the electric control device K1 is DC24V 1.6.6K/2.8K internal resistance.

The working flow of the protection circuit is as follows: 1, the protection circuit and the protected circuit are connected in parallel to the rear end of the alternating current trigger switch, and the protected load is connected in series to an output loop of an electric control device K1. 2, electrifying, the protection circuit and the protected circuit work simultaneously, the protected circuit gives out a control signal to enable the triode to be conducted, because the speed of the electronic switch is microsecond level and the speed of the mechanical switch is 10ms level, when the mechanical switch is electrified and is not triggered to act, the circuit of the electronic switch part is already conducted, then two ends of the electric control device K1 are short-circuited, and therefore the load connected with the output loop of the electric control device K1 in series works normally. 3, in the normal working state, the normal working time t1 and t1 of the protected circuit are timed, the main control finishes controlling the load, and the running time t2 of the protection circuit is more than or equal to t 1. 4: when the protected circuit works beyond the normal working time t1 and the master control loses effective control over the load, the protection circuit starts to work at the set time t2, and the electric control device K1 is driven by the circuit to actively cut off the load connected in series by closing the triode, so that the effect of protecting the load is achieved. 5: when the main control logic device of the main control loop fails, the triode cannot be driven because the driving signal of the protection circuit is driven by PWM coupling, namely the electric control device K1 is driven by the electric principle of the circuit to actively cut off the loads connected in series when the power is on initially, and the effect of protecting the loads is achieved.

As shown in fig. 5 and 7, a resistor R1 has a capacitor CX1 connected in parallel to both ends thereof to form a resistor-capacitor voltage-reducing module. The resistance-capacitance voltage reduction output is more stable.

On the basis of embodiment 1, as shown in fig. 6 and 7, the transistor Q1 and the transistor Q2 are replaced by MOS transistors. The working principle is basically the same.

As shown in fig. 8, the specific productization operation of the design can be visually seen.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.