Power output current direction control and protection device
A technology of current direction and protection device, applied in battery circuit device, emergency protection circuit device, emergency protection circuit device for limiting overcurrent/overvoltage, etc., to achieve the effect of protecting load, small heat, and protecting output part
Active Publication Date: 2017-02-15
EFORE (SUZHOU) ELECTRONICS CO LTD
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- Application Information
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a power supply output current direction control and protection device under the condition of inductive load, which can ensure the safety of the load system when the output current cannot be reversed into the power supply, and at the same time the energy Recyclable without generating excess heat
Method used
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Embodiment Construction
[0012] Such as figure 1 As shown, the power supply output current direction control and protection device includes a rectification unit 1 and a filter unit 2, the output terminal of the rectification unit 1 is connected to the filter unit 2, and the positive output terminal of the filter unit 2 is connected to the anti-backfeed diode 3 and the output control switch 14, the output control switch 14 is connected to the step-down circuit 13, the cathode of the anti-backfeed diode 3 is connected to the voltage detection branch 6, the switch 11 and the inductive load 9, one end of the voltage detection branch 6 is located at the front end of the inductive load 9, and the sampling branch One end of 7 is connected to the rear end of the inductive load 9, the other end of the voltage detection branch 6 and the other end of the sampling branch 7 are connected to the control circuit unit 8, the control circuit unit is an MCU control unit, the control circuit unit 8 and the switch 11 It ...
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The invention relates to a power supply output current direction control and protection device. The output terminal of the rectifier unit is connected to the filter unit. The positive output terminal of the filter unit is connected to an anti-backfeed diode and an output control switch. Voltage detection branch, switch and inductive load, one end of the voltage detection branch is located at the front end of the inductive load, one end of the sampling branch is connected to the rear end of the inductive load, the other end of the voltage detection branch and the other end of the sampling branch are connected to the control circuit unit, The control circuit unit is connected to the switch and the output control switch. The other end of the switch is connected to the energy storage capacitor through the current limiting resistor. The output end of the current limiting resistor is connected to the boost circuit. The circuit unit, filter unit, boost circuit, step-down circuit, energy storage capacitor and high voltage energy storage capacitor are grounded. Absorb and utilize the energy poured back from the load, limit the maximum voltage of the load, and protect the load.
Description
technical field [0001] The invention relates to a power supply output current direction control and protection device under the condition of inductive load. Background technique [0002] At present, the DC power supply can convert the mains power into a constant or variable DC voltage, and can adjust the output voltage and current values to supply power to the load. In order to maintain the stability of the output voltage, many large-capacity electrolytic capacitors are generally connected in parallel at the output end, and sometimes a long cable or filter inductor is connected to the output end for remote power supply. [0003] In order to prevent the internal output capacitor of the charger from charging the internal output capacitor of the charger to cause excessive voltage and burn out the circuit under the condition of inductive load, the traditional power supply generally adds an output diode or a relay to the output to prevent the current from flowing back. This me...
Claims
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IPC IPC(8): H02H11/00H02H9/04H02J7/00
Inventor 周军张坤徐文君
Owner EFORE (SUZHOU) ELECTRONICS CO LTD