High-power switching power supply circuit based on non-power factor correction and control method
A technology of power factor correction and high-power switching, which is applied in the direction of converting AC power input to DC power output, output power conversion device, measuring current/voltage, etc. Major and other issues
Pending Publication Date: 2020-11-17
深圳市雅晶源科技有限公司
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Problems solved by technology
[0002] The harmonic requirements of the traditional switching power supply over safety regulations need to add a PFC circuit. There are many power devices in the PFC circuit and the volume is large, which is not suitable for applications with high power density.
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[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be made below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, and Not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0023] The preferred embodiment of the present invention is as figure 1 As shown, it includes capacitor C, first resistor R1, second resistor R2, second resistor R3, voltage detection unit U1, switch tube Q1, thermistor RTC, rectifier bridge BD1 and transformer LF1; the two ends of the transformer LF1 The first end and the second end of the rectifier bridge BD1 are respectively electrically conn...
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The invention discloses a high-power switching power supply circuit based on non-power factor correction and a control method. The high-power switching power supply circuit comprises a capacitor, a first resistor, a second resistor, a third resistor, a voltage detection unit, a switching tube, a thermistor, a rectifier bridge and a transformer, the two ends of the transformer are electrically connected with the rectifier bridge, the rectifier bridge is electrically connected with the first end of the switch tube and the first end of the thermistor, and the rectifier bridge is electrically connected with the first end of the first resistor and the first end of the capacitor. The second end of the thermistor is electrically connected with the second end of the switch tube, the voltage detection unit, the first end of the second resistor and the second end of the capacitor, the third end of the switch tube is electrically connected with the voltage detection unit, and the second end of the first resistor is electrically connected with the first end of the third resistor. The second end of the third resistor is electrically connected with the voltage detection unit and the second end of the second resistor, and the voltage detection unit is electrically connected with the power input end. The invention has the advantages of simple structure and low cost, and is suitable for high-power density occasions.
Description
technical field [0001] The invention relates to the technical field of switching power supply control, in particular to a high-power switching power supply circuit and a control method based on no power factor correction. Background technique [0002] The harmonic requirements of traditional switching power supplies require a PFC circuit. There are many power devices in the PFC circuit and the volume is large, which is not suitable for applications with high power density. In the case of no PFC circuit, the power devices in the circuit can be reduced and the size of the power supply can be reduced when the harmonic standard is met. With the increasing demand for high efficiency and high power density in the market, it has become a trend to replace traditional PFC circuits with bridges without PFC circuits. Therefore, inventing a high-power switching power supply circuit with a simple structure has become an urgent problem to be solved by those skilled in the art. Contents...
Claims
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IPC IPC(8): H02M1/32H02M1/14H02M7/217G01R19/165
CPCG01R19/165H02M1/14H02M1/32H02M7/217
Inventor 崔永明郑子龙钟瑞陈然冯特强
Owner 深圳市雅晶源科技有限公司