Driving circuit based on equipment switch

Abstract

The utility model relates to the technical field of equipment start control, and provides a drive circuit based on an equipment switch, which comprises a switch start module, a switch control module and a start-stop indication module. The control end of the switch control module is connected with the switch starting module; the output end is connected with the negative electrode of the load; the start-stop indication module is connected with the load in parallel, the input end of the start-stop indication module and the positive electrode of the load are connected with the power input end, and the start-stop indication module is further connected with the output end of the switch control module. A start-up indication assembly, a standby indication assembly and a protection assembly are arranged to form a start-stop indication module; as the standby indication assembly is directly connected with the power supply input end, standby indication is directly carried out after the equipment is powered on; the power-on indication assembly is arranged to be connected to the two ends of the load in parallel, it is ensured that synchronous display is conducted when the load is powered on and started, at the moment, the standby indication assembly is not conducted under clamping of the protection assembly, and automatic time-sharing indication of power-on and standby is achieved; and parts are simple, control by a control chip is not needed, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment start control, in particular to a drive circuit based on an equipment switch. Background Technique

[0002] The start of an equipment switch refers to controlling the opening and closing of the equipment by operating the switch device. Such a switch device can be a physical switch or an electronic switch, and its purpose is to facilitate users to control the operating state of the equipment according to needs.

[0003] Physical switches are usually installed on the control panel of the equipment, allowing operators to directly control the start and stop of the equipment. For example, a start switch, also known as a starter or start button, is used to receive instructions from the operator and control the start and stop of a motor or other equipment.

[0004] In existing drive circuits, an equipment switch is usually used to adjust the load, such as adjusting the rotation of a motor. In addition to the motor, the load to be adjusted can also be other inductive loads, capacitive loads, etc.

[0005] For the convenience of user control, equipment is generally configured with an indication status function. The main functions of the indicator light include displaying the status of the equipment or system, prompting potential faults, providing operation information, and ensuring that users can quickly understand and respond through different colors and flashing modes, so as to ensure the safe operation of the equipment and the safety of users.

[0006] The existing control of equipment indicator lights is usually implemented by devices such as single-chip microcontrollers or PLCs, with a high cost. Based on program software control, the chip also requires programming code, with high complexity. Summary of the Invention

[0007] The utility model provides a drive circuit based on an equipment switch, which solves the technical problems that the drive circuit for synchronous display based on the start and stop of existing equipment depends on a control chip, with high cost and low applicability.

[0008] To solve the above technical problems, the utility model provides a drive circuit based on an equipment switch, including a switch start module, a switch control module, and a start-stop indication module; the control end of the switch control module is connected to the switch start module, and the output end is connected to the negative pole of the load; the start-stop indication module is connected in parallel with the load, the input end of the start-stop indication module, the positive pole of the load, and the power input end are connected, and the start-stop indication module is also connected to the output end of the switch control module.

[0009] In a further embodiment, the start-stop indication module includes a power-on indication component and a standby indication component; one end of the power-on indication component is connected to the power input terminal, and the other end is connected to the output terminal of the switch control module; the standby indication component is connected to the power input terminal.

[0010] In a further embodiment, the power-on indication component includes a first resistor R1 and an indicator lamp LED1. The positive electrode of the indicator lamp LED1 is connected to the power input terminal through the first resistor R1, and the negative electrode of the indicator lamp LED1 is connected to the output terminal of the switch control module.

[0011] The standby indication component includes a second resistor R2 and an indicator lamp LED2. The positive electrode of the indicator lamp LED2 is connected to the power input terminal through the second resistor R2.

[0012] In a further embodiment, the start-stop indication module further includes a protection component. The protection component includes a diode D1 and a diode D2. The positive electrode of the diode D1 is connected between the positive electrode of the indicator lamp LED2 and the second resistor R2, and the negative electrode is connected to the negative electrode of the indicator lamp LED1; the positive electrode of the diode D2 is connected to the negative electrode of the indicator lamp LED2, and the negative electrode is grounded.

[0013] In a further embodiment, the switch control module includes a first switch tube Q1, a third resistor R3, and a fourth resistor R4. The control terminal of the first switch tube Q1 is connected to the switch start module through the third resistor R3, the first end is connected to the negative electrode of the load, and the second end is grounded; one end of the fourth resistor R4 is connected to the control terminal of the first switch tube Q1, and the other end is grounded.

[0014] In a further embodiment, the switch start module includes an equipment switch, a second switch tube Q2, a fifth resistor R5, and a diode D3; the control terminal of the second switch tube Q2 is connected to the equipment switch, the first end is connected to the control terminal of the switch control module, and the second end is grounded; one end of the fifth resistor R5 is connected to the control terminal of the second switch tube Q2, and the other end is grounded; the positive electrode of the diode D3 is connected to the control terminal of the second switch tube Q2, and the negative electrode is connected to the first end of the second switch tube Q2.

[0015] In a further embodiment, a filter protection module connected in series between the switch start module and the switch control module is further included. The filter protection module includes a sixth resistor R6, a capacitor C1, and a diode D4; one end of the sixth resistor R6 is connected to the switch start module, and the other end is connected to the control terminal of the switch control module; one end of the capacitor C1 is connected to the other end of the sixth resistor R6, and the other end is grounded; the positive electrode of the diode D4 is connected to the control terminal of the switch control module, and the negative electrode is connected to the switch start module.

[0016] A sixth resistor R6 and a capacitor C1 are arranged between the switch starting module and the switch control module to form an RC filtering structure, which serves to slow down the peak pulse; a diode D4 is arranged at the control end of the first switching transistor Q1. When the temperature switch changes from being pressed to released, the energy stored in the capacitor C1 quickly reaches the second switching transistor Q2 through the diode D4 and discharges to GND, effectively protecting the components at the back end from being damaged.

[0017] In a further embodiment, it further includes a diode D5 connected in parallel with the load. The positive electrode of the diode D5 is connected to the negative electrode of the load, and the negative electrode of the diode D5 is connected to the positive electrode of the load.

[0018] The beneficial effects of the present utility model are as follows:

[0019] (1) An on / off indication module is formed by setting an on indication component, a standby indication component, and a protection component; since the standby indication component is directly connected to the power input terminal, it directly performs standby indication after the device is powered on; the on indication component is set in parallel across the load to ensure that the display is synchronized when the load is powered on and started, and the on / off states are synchronously displayed; at this time, the standby indication component is not conducting under the clamping of the protection component, realizing automatic time-sharing indication of on and standby; moreover, the components are simple, without the need for a control chip to control, and the cost is low.

[0020] (2) A temperature switch (device switch) is set to cooperate with a switching transistor to form a switch starting module, which provides efficient temperature control and battery protection, with high stability, fast response speed, high precision, simple structure, low cost, and high safety. Description of the Drawings

[0021] Figure 1 is a system framework diagram of a drive circuit based on a device switch provided by an embodiment of the present utility model;

[0022] Figure 2 is provided by an embodiment of the present utility model Figure 1 in the hardware circuit diagram;

[0023] Among them: switch starting module 1, switch control module 2, on / off indication module 3, filtering and protection module 4, load MG1, device switch K1. Specific Embodiments

[0024] The following specifically illustrates the embodiments of the present utility model in conjunction with the drawings. The given embodiments are only for illustrative purposes and should not be construed as a limitation to the present utility model. The drawings are only for reference and illustration, and do not constitute a limitation to the scope of patent protection of the present utility model, because many changes can be made to the present utility model without departing from the spirit and scope of the present utility model.

[0025] A driving circuit based on a device switch K1 provided by an embodiment of the present utility model is as follows Figure 1 As shown, in this embodiment, it includes a switch starting module 1, a switch control module 2, and a start-stop indication module 3; the control end of the switch control module 2 is connected to the switch starting module 1, and the output end is connected to the negative pole of the load MG1; the start-stop indication module 3 is connected in parallel with the load MG1, the input end of the start-stop indication module 3, the positive pole of the load MG1 are connected to the power input end, and the start-stop indication module 3 is also connected to the output end of the switch control module 2.

[0026] Among them, the load MG1 includes but is not limited to a motor or a high-current electrical appliance.

[0027] In this embodiment, the start-stop indication module 3 includes a power-on indication component and a standby indication component; one end of the power-on indication component is connected to the power input end, and the other end is connected to the output end of the switch control module 2; the standby indication component is connected to the power input end.

[0028] In this embodiment, the power-on indication component includes a first resistor R1 and an indicator light LED1. The positive pole of the indicator light LED1 is connected to the power input end through the first resistor R1, and the negative pole of the indicator light LED1 is connected to the output end of the switch control module 2;

[0029] The standby indication component includes a second resistor R2 and an indicator light LED2. The positive pole of the indicator light LED2 is connected to the power input end through the second resistor R2.

[0030] Among them, the indicator lights LED1 and LED2 are respectively set as indicator lights of different colors, including but not limited to red and green. For example, the red light of the indicator light LED1 synchronously indicates that the load MG1 motor is working, and the green light of the indicator light LED2 indicates no work and standby.

[0031] In this embodiment, the start-stop indication module 3 further includes a protection component. The protection component includes a diode D1 and a diode D2. The positive pole of the diode D1 is connected between the positive pole of the indicator light LED2 and the second resistor R2, and the negative pole is connected to the negative pole of the indicator light LED1; the positive pole of the diode D2 is connected to the negative pole of the indicator light LED2, and the negative pole is grounded.

[0032] In this embodiment, the switch control module 2 includes a first switching tube Q1, a third resistor R3, and a fourth resistor R4. The control end of the first switching tube Q1 is connected to the switch starting module 1 through the third resistor R3, the first end is connected to the negative pole of the load MG1, and the second end is grounded; one end of the fourth resistor R4 is connected to the control end of the first switching tube Q1, and the other end is grounded.

[0033] Among them, the first switching tube Q1 is set according to the power of the load MG1, including but not limited to selecting a triode, a high-power thyristor, a Mos tube, a relay, and a silicon-controlled rectifier.

[0034] In this embodiment, the switch starting module 1 includes a device switch K1, a second switching tube Q2, a fifth resistor R5, and a diode D3; the control end of the second switching tube Q2 is connected to the device switch K1, the first end is connected to the control end of the switch control module 2, and the second end is grounded; one end of the fifth resistor R5 is connected to the control end of the second switching tube Q2, and the other end is grounded; the positive pole of the diode D3 is connected to the control end of the second switching tube Q2, and the negative pole is connected to the first end of the second switching tube Q2.

[0035] Preferably, the device switch K1 selects a temperature switch.

[0036] In this embodiment, a filtering and protection module 4 is further included in series between the switch starting module 1 and the switch control module 2. The filtering and protection module 4 includes a sixth resistor R6, a capacitor C1, and a diode D4; one end of the sixth resistor R6 is connected to the switch starting module 1, and the other end is connected to the control end of the switch control module 2; one end of the capacitor C1 is connected to the other end of the sixth resistor R6, and the other end is grounded; the positive pole of the diode D4 is connected to the control end of the switch control module 2, and the negative pole is connected to the switch starting module 1.

[0037] In this solution, a sixth resistor R6 and a capacitor C1 are set between the switch starting module 1 and the switch control module 2 to form an RC filtering result, which plays a role in releasing spike pulses; a diode D4 is set at the control end of the first switching tube Q1. When the temperature switch changes from being pressed to being released, the energy stored in the capacitor C1 quickly reaches the second switching tube Q2 through the diode D4 and discharges to GND, effectively protecting the devices at the back end from being damaged.

[0038] In this embodiment, a diode D5 is further included in parallel with the load MG1. The positive pole of the diode D5 is connected to the negative pole of the load MG1, and the negative pole of the diode D5 is connected to the positive pole of the load MG1.

[0039] Specifically, the diode D5 is used to release the back electromotive force for inductive loads such as the load MG1. The diode D5 provides a reverse circuit, thereby protecting the control switching tube Q2 from being burned out.

[0040] Taking the first switching tube Q1 as an NPN-type triode, the second switching tube Q2 as a PNP-type triode, and the load MG1 as a motor as an example, the working principle of this embodiment is as follows:

[0041] When the temperature switch is not pressed, 12V powers the indicator LED2 through the second resistor R2, then through the diode D2 to GND, and the green light turns on. The function of the diode D2 is to clamp the voltage across the indicator LED2 when the indicator LED1 is on, so that it does not turn on and does not work. This step ensures that the two indicators do not turn on simultaneously.

[0042] When the temperature switch is pressed, the 12V current charges the capacitor C1 through the diode D3 and the sixth resistor R6. The specific charging duration is determined by the capacitance value of the capacitor C1, which is about several microseconds here. This RC circuit mainly plays the role of releasing spike pulses. The current reaches the base of the first switching transistor Q1 to drive Ice to conduct, and the load MG1 conducts and works. Since Ice conducts, the collector potential of the first switching transistor Q1 is 0.3V, and the indicator LED1 lights up synchronously to indicate that it is working. Due to the clamping effect of the diode D1 and the diode D2, the voltage across the indicator LED2 is lower than 2V and it cannot light up.

[0043] When the temperature switch changes from pressed to released, the energy stored in the capacitor C1 quickly reaches the second switching transistor Q2 through the diode D4 and discharges to GND, protecting the components at the back end from being damaged. The fourth resistor R4 plays a steady-state role here, enabling the temperature switch to ensure that the load MG1 is disconnected and does not start working when it is not pressed.

[0044] The beneficial effects of the present utility model are as follows:

[0045] (1) An on - off indication module 3 is composed of a startup indication component, a standby indication component, and a protection component. Since the standby indication component is directly connected to the power input terminal, it directly performs standby indication after the device is powered on. The startup indication component is connected in parallel across the load MG1 to ensure synchronous display when the load MG1 is powered on and starts, synchronously displaying the start - stop state. At this time, the standby indication component is not conducting under the clamping of the protection component, realizing automatic time - sharing indication of startup and standby. And the components are simple, without the need for a control chip to control, and the cost is low.

[0046] (2) A switch startup module 1 is formed by setting a temperature switch (device switch K1) in cooperation with a switching transistor, providing efficient temperature control and battery protection, with high stability, fast response speed, high precision, simple structure, low cost, and high safety.

[0047] The above embodiments are the preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present utility model shall be equivalent replacement methods and are all included in the protection scope of the present utility model.

Claims

1. A driving circuit based on a device switch, characterized in that: It includes a switch startup module, a switch control module, and a start / stop indication module; the control end of the switch control module is connected to the switch startup module, and the output end is connected to the negative pole of the load; the start / stop indication module is connected in parallel with the load, the input end of the start / stop indication module, the positive pole of the load, and the power input end are connected, and the start / stop indication module is also connected to the output end of the switch control module.

2. The drive circuit based on the device switch according to claim 1, wherein: The start / stop indication module includes a power-on indication component and a standby indication component; one end of the power-on indication component is connected to the power input end, and the other end is connected to the output end of the switch control module; the standby indication component is connected to the power input end.

3. The drive circuit based on the device switch according to claim 2, wherein: The power-on indication component includes a first resistor R1 and an indicator lamp LED1. The positive pole of the indicator lamp LED1 is connected to the power input end through the first resistor R1, and the negative pole of the indicator lamp LED1 is connected to the output end of the switch control module. The standby indication component includes a second resistor R2 and an indicator lamp LED2. The positive pole of the indicator lamp LED2 is connected to the power input end through the second resistor R2.

4. The drive circuit based on the device switch according to claim 3, characterized in that: The start / stop indication module further includes a protection component, and the protection component includes a diode D1 and a diode D2. The positive pole of the diode D1 is connected between the positive pole of the indicator lamp LED2 and the second resistor R2, and the negative pole is connected to the negative pole of the indicator lamp LED1; the positive pole of the diode D2 is connected to the negative pole of the indicator lamp LED2, and the negative pole is grounded.

5. The drive circuit based on the device switch according to claim 1, wherein: The switch control module includes a first switch tube Q1, a third resistor R3, and a fourth resistor R4. The control end of the first switch tube Q1 is connected to the switch startup module through the third resistor R3, the first end is connected to the negative pole of the load, and the second end is grounded; one end of the fourth resistor R4 is connected to the control end of the first switch tube Q1, and the other end is grounded.

6. The drive circuit based on a device switch according to claim 1, characterized in that: The switch startup module includes a device switch, a second switch tube Q2, a fifth resistor R5, and a diode D3; the control end of the second switch tube Q2 is connected to the device switch, the first end is connected to the control end of the switch control module, and the second end is grounded; one end of the fifth resistor R5 is connected to the control end of the second switch tube Q2, and the other end is grounded; the positive pole of the diode D3 is connected to the control end of the second switch tube Q2, and the negative pole is connected to the first end of the second switch tube Q2.

7. The drive circuit based on the device switch according to claim 1, wherein: It further includes a filter protection module connected in series between the switch startup module and the switch control module. The filter protection module includes a sixth resistor R6, a capacitor C1, and a diode D4; one end of the sixth resistor R6 is connected to the switch startup module, and the other end is connected to the control end of the switch control module; one end of the capacitor C1 is connected to the other end of the sixth resistor R6, and the other end is grounded; the positive pole of the diode D4 is connected to the control end of the switch control module, and the negative pole is connected to the switch startup module.

8. The drive circuit based on a device switch according to claim 1, characterized in that: It further includes a diode D5 connected in parallel with the load. The positive pole of the diode D5 is connected to the negative pole of the load, and the negative pole of the diode D5 is connected to the positive pole of the load.

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