继电器驱动电路、继电器及电源设备
By using a single power supply drive method and hardware control logic to switch power supply paths, the problems of relay coil temperature and power consumption in existing technologies are solved, achieving low-cost and high-efficiency relay control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN POWEROAK NEWENER CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies require multiple I/O interface resources to reduce relay coil temperature and power consumption, increasing the control complexity and cost of the product.
A single power supply driving method is adopted. The power supply path is switched at different stages by the first switching circuit in the relay driving circuit. By using the current limiting voltage divider circuit and the energy discharge circuit, the relay can be powered by different voltages during the start-up and maintenance stages, thereby reducing the occupation of I/O interface resources.
This approach reduces relay power consumption and coil temperature without increasing I/O interface resources, while also simplifying control logic and lowering hardware design costs and control complexity.
Smart Images
Figure CN224519798U_ABST
Abstract
Claims
1. A relay drive circuit, characterized by comprising: include: The first switching circuit, electrically connected to the coil of the relay, is configured to receive the drive power. An energy discharge circuit is electrically connected to the first switching circuit. A current-limiting voltage divider circuit is electrically connected to the coils of the first switching circuit and the relay, respectively. The charging circuit is electrically connected to the first switching circuit and the energy discharge circuit. The starting circuit is electrically connected to the coils of the charging circuit and the relay, respectively. The startup circuit is configured to control the drive power supply to charge the charging circuit through the first switching circuit when a first control signal is received, and to stop working when a second control signal is received. The first switching circuit is configured to turn on during the charging process of the charging circuit, so that the driving power supply supplies power to the coil of the relay and bypasses the current limiting voltage divider circuit; and to turn off when the charging voltage of the charging circuit reaches a preset value, so that the driving power supply supplies power to the coil of the relay through the current limiting voltage divider circuit. The energy discharge circuit is configured to turn on when the start-up circuit stops working, so as to discharge the energy of the charging circuit and the energy of the coil.
2. The relay drive circuit according to claim 1, characterized by The first switching circuit includes a first switching transistor, which is electrically connected to the energy discharge circuit, the current limiting voltage divider circuit, and the charging circuit. It is configured to, in response to the start-up circuit, enter a conducting state to allow the driving power supply to charge the charging circuit through the first switching transistor, and also to power the relay coil and bypass the current limiting voltage divider circuit; and to, in response to the charging voltage of the charging circuit reaching a preset value, enter a cut-off state to allow the driving power supply to power the relay coil through the current limiting voltage divider circuit.
3. The relay drive circuit according to claim 2, characterized by The first switching transistor is a PNP transistor. The emitter of the PNP transistor is powered by a driving power supply. The collector of the PNP transistor is electrically connected to the current-limiting voltage divider circuit and the coil of the relay, respectively. The base of the PNP transistor is electrically connected to the charging circuit. The PNP transistor is configured to respond to the operation of the startup circuit, enter the on state so that the driving power supply charges the charging circuit through the PNP transistor, and also supplies power to the coil of the relay and bypasses the current-limiting voltage divider circuit; and enter the off state when the charging voltage of the charging circuit reaches a preset value so that the driving power supply supplies power to the coil of the relay through the current-limiting voltage divider circuit.
4. The relay drive circuit according to any one of claims 1 to 3, characterized by The current limiting and voltage dividing circuit includes a first resistor unit. The first end of the first resistor unit is electrically connected to the first switching circuit, and the second end of the first resistor unit is electrically connected to the coil of the relay. The first resistor unit is configured to be bypassed by the first switching circuit when the charging circuit is in a charging state, and to transmit current to the coil of the relay based on the driving power supply when the charging voltage of the charging circuit reaches a preset value.
5. The relay drive circuit according to any one of claims 1 to 3, characterized by The charging circuit includes a second resistor unit and a capacitor unit. The first end of the second resistor unit is electrically connected to the first switching circuit. The second end of the second resistor unit is electrically connected to the first end of the capacitor unit and the energy discharge circuit. The second end of the capacitor unit is electrically connected to the start-up circuit. The capacitor unit is configured to enter a charging state when the start-up circuit is working and to disconnect the first switching circuit when the charging voltage of the capacitor unit reaches a preset value, and to discharge energy through the energy discharge circuit when the start-up circuit stops working.
6. The relay drive circuit according to any one of claims 1 to 3, characterized by The startup circuit includes a second switching circuit, which is electrically connected to the coils of the charging circuit and the relay, respectively. It is configured to control the drive power supply to charge the charging circuit through the first switching circuit when a first control signal is received, and to stop working when a second control signal is received.
7. The relay drive circuit according to claim 6, characterized by The second switching circuit includes a second switching transistor, which is electrically connected to the coils of the charging circuit and the relay, respectively. It is configured to control the drive power supply to charge the charging circuit through the first switching circuit when a first control signal is received, and to stop working when a second control signal is received.
8. The relay drive circuit according to any one of claims 1 to 3, characterized by The energy discharge circuit includes a diode, the positive terminal of which is electrically connected to the charging circuit, and the negative terminal of which is electrically connected to the first switching circuit and the current limiting voltage divider circuit.
9. A relay characterized by comprising: The device includes a coil, an actuating component, a microcontroller, and a relay drive circuit as described in any one of claims 1 to 8. The coil is coupled to the actuating component and is also electrically connected to a current-limiting voltage divider circuit and a startup circuit of the relay drive circuit, respectively. The microcontroller is electrically connected to the startup circuit and is configured to send a first control signal or a second control signal to the startup circuit.
10. A power supply device characterized by comprising: Includes the relay as described in claim 9.