继电器复位电路与继电器控制系统

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By automatically monitoring and controlling the magnetic latching relay to reset when the power supply is abnormal through the relay reset circuit, the problems of slow response speed and poor reliability in the existing technology are solved, and low-cost, reliable automated relay management is achieved.

CN224519795UActive Publication Date: 2026-07-17SHENZHEN POWEROAK NEWENER CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: SHENZHEN POWEROAK NEWENER CO LTD
Filing Date: 2025-07-09
Publication Date: 2026-07-17

AI Technical Summary

Technical Problem

Existing magnetic latching relays cannot automatically reset in time when the power supply is abnormal, which leads to safety hazards. In addition, existing MCU detection solutions have poor reliability in harsh environments, high cost, and are difficult to debug.

Method used

A relay reset circuit is adopted, including a first unidirectional conductive module, a second unidirectional conductive module, a switching module, an energy storage module, and a clamping module. By monitoring the input power supply voltage, the relay is automatically controlled to reset, avoiding the use of MCU and energy storage components.

Benefits of technology

It enables automatic and low-cost relay reset in case of power failure, is suitable for remote and automated management, improves reliability, and reduces cost and debugging difficulty.

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Abstract

本申请公开了一种继电器复位电路与继电器控制系统，继电器复位电路包括第一单向导电模块、第二单向导电模块、开关模块、储能模块和钳位模块。储能模块接收第一单向导电模块正向输出电压充电蓄能以使开关模块的输入端电压值达至预设电压。钳位模块将第二单向导电模块对地电压钳位至钳位电压。当输入电源的电压超过第一阈值，预设电压、第二正向压降和钳位电压配合控制开关模块的导通以发送复位信号；当输入电源的电压小于第二阈值，第一正向压降和第二正向压降控制开关模块导通以发送复位信号；当输入电源的电压在第一阈值和第二阈值之间，预设电压和输入电源配合控制开关模块的截止。通过上述方式，能够在输入电源异常时可靠地复位继电器。

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Claims

1. A relay reset circuit, characterized by comprising: The application relates to a relay reset circuit. The relay reset circuit comprises a first unidirectional conductive module and a second unidirectional conductive module, both of which have first ends for connecting an input power supply; A switch module has an input end, a control end and an output end connected to the second end of the first unidirectional conductive module, the second end of the second unidirectional conductive module and the relay respectively, the first end of the first unidirectional conductive module is turned on when a first forward voltage drop of the second end is relatively small, and the second end of the second unidirectional conductive module is turned on when a second forward voltage drop of the first end is relatively small; An energy storage module is connected to the input end of the switch module and is used for charging and storing energy when the first unidirectional conductive module is turned on so that the input end voltage of the switch module reaches a preset voltage; A clamping module is connected to the first end of the second unidirectional conductive module and is used for clamping the first end of the second unidirectional conductive module to a clamping voltage when the voltage of the input power supply exceeds a first threshold value; When the voltage of the input power supply exceeds the first threshold value, the preset voltage, the second forward voltage drop and the clamping voltage are used for cooperating to control the switch module to be turned on to send a reset signal to the relay; when the voltage of the input power supply is less than a second threshold value, the first forward voltage drop and the second forward voltage drop are used for controlling the switch module to be turned on to send a reset signal to the relay; when the voltage of the input power supply is in the range of the first threshold value and the second threshold value, the preset voltage and the input power supply are used for cooperating to control the switch module to be turned off.

2. The relay reset circuit according to claim 1, characterized by The switch module comprises a PNP type triode and a first resistor; The base of the PNP type triode is connected to the second end of the second unidirectional conductive module through the first resistor, the emitter of the PNP type triode is connected to the second end of the first unidirectional conductive module, and the collector of the PNP type triode is connected to the relay.

3. The relay reset circuit of claim 1, wherein The switch module comprises a PMOS tube, a second resistor and a third resistor; The gate of the PMOS tube is connected to the first end of the second resistor and the first end of the third resistor respectively, the source of the PMOS tube and the second end of the second resistor are connected to the second end of the first unidirectional conductive module, and the drain of the PMOS tube is connected to the relay.

4. The relay reset circuit of claim 1, wherein The first unidirectional conductive module comprises a first diode, the anode of the first diode is the first end of the first unidirectional conductive module, and the cathode of the first diode is the second end of the first unidirectional conductive module.

5. The relay reset circuit of claim 1, wherein The clamping module comprises a voltage stabilizing diode; The cathode of the voltage stabilizing diode is connected to the first end of the second unidirectional conductive module, and the anode of the voltage stabilizing diode is grounded.

6. The relay reset circuit of claim 1, wherein The second unidirectional conductive module comprises a second diode, the anode of the second diode is the second end of the second unidirectional conductive module, and the cathode of the second diode is the first end of the second unidirectional conductive module.

7. The relay reset circuit of claim 1, wherein The energy storage module comprises a first capacitor, the first end of the first capacitor is connected to the input end of the switch module, and the second end of the first capacitor is grounded.

8. The relay reset circuit according to any one of claims 1 to 7, characterized by The relay reset circuit further comprises a first current-limiting resistor, a second current-limiting resistor, a first pull-down resistor and a second pull-down resistor. The first end of the first unidirectional conductive module is connected with the input power supply through the first current-limiting resistor, the second current-limiting resistor is connected between the input power supply and the first end of the second unidirectional conductive module, the first pull-down resistor is connected between the input power supply and the ground, and the second pull-down resistor is connected between the output end of the switch module and the ground.

9. The relay reset circuit according to any one of claims 1 to 7, characterized by The relay reset circuit further comprises a filter capacitor; The filter capacitor is connected between the input power supply and the ground.

10. A relay control system characterized by comprising: Comprise: a relay; a controller connected with the relay, configured to output a pulse signal to the relay to make the relay close when the relay control system is powered on; The relay reset circuit according to any one of claims 1 to 9 is configured to monitor the voltage of the input power supply and send a reset signal to the relay when the voltage of the input power supply exceeds a first threshold value or is less than a second threshold value.