Power supply switching circuit, equipment and alternate control method of power factor correction circuit

Abstract

The invention relates to a circuit technology and discloses a power supply switching circuit, equipment and an alternate control method of a power factor correction circuit. The power supply switching circuit comprises a first bridge arm unit, a second bridge arm unit and a capacitor, wherein the upper end of the first bridge arm unit and the upper end of the second bridge arm unit are connected with a first port of the capacitor, and the lower end of the first bridge arm unit and the lower end of the second bridge arm unit are connected with a second port of the capacitor; the first bridge arm unit comprises two diodes which are connected in series in the same direction, and the connection part of the two diodes is used for connecting with the first port of a power supply; the second bridge arm unit comprises two switching tubes and an inductor, and the two switching tubes of the second bridge arm unit are connected in series in the same direction; a first port of the inductor is connected to the connection part of the two switching tubes of the second bridge arm unit; and a second port of the inductor is used for connecting with the second port of the power supply. By using the invention, the utilization ratio of the inductor can be improved.

Description

technical field [0001] The invention relates to circuit technology, in particular to a power conversion circuit and equipment, and a power factor correction circuit interleaving control method. Background technique [0002] Energy saving and emission reduction is a trend of global development, and the conversion efficiency of power supply in the communication field is an important part of it. On the one hand, the high efficiency of power supply depends on the improvement of power devices; on the other hand, it is the application of power topology. [0003] An existing power conversion circuit using bridgeless power factor correction (PFC: Power Factor Correction) circuit includes: inductor L1 and inductor L2, switch tube S1 and switch tube S2, diode D1, diode D2, diode D3, diode D4, diode D5 and diode D6. in: [0004] Inductor L1 and inductor L2 are boost circuit inductance, switch tube S1 and switch tube S2 are PFC main switch tubes, diode D1 and diode D2 are Boost power...

AI Technical Summary

Problems solved by technology

[0009] The positive and negative half cycles of the power conversion circuit are completed by different Boost circuits, and the utilization rate of the inductance is low, resulting in low utilization rate of power devices

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