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Yongli Technology has obtained a patent for a switching power supply and its high-voltage discharge circuit, which can reduce the high voltage to below a safe voltage

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.06.03
On May 30, 2024, the financial sector reported that, according to the announcement of the China National Intellectual Property Administration, Wuhan Yongli Technology Co., Ltd. had obtained a patent entitled "a switching power supply and its high-voltage discharge circuit", with the authorization announcement number of CN221042656U and the application date of September 2023.

The patent abstract shows:

This utility model discloses a switching power supply and a discharge circuit for its high-voltage output. The discharge circuit for the high-voltage output includes a discharge unit and a discharge control unit;

The discharge unit has a series connected discharge switch tube and discharge resistor, which are connected between the positive end of the high-voltage output of the switching power supply and the grounding terminal;

The discharge control unit comprises a transistor, whose base is connected to a preset power supply through a first resistor, and its collector is connected to the preset power supply through a series connected second resistor and diode. The collector is also connected to the control end of the discharge switch tube, and the emitter of the transistor is grounded; There is also a first capacitor connected between the cathode of the diode and ground, and a third resistor connected between the control terminal of the discharge switch tube and ground.

The discharge circuit of the high-voltage output of this utility model does not work and does not consume energy when the mains power is supplied normally. After the mains power input is disconnected, the discharge circuit automatically starts to lower the high-voltage to a safe voltage. After the discharge is completed, the discharge circuit automatically closes.


Attached drawings of patent abstract
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