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Bridgeless PFC circuit control method and device, electronic equipment and storage medium

A circuit control and circuit technology, applied in the field of electronic equipment and storage media, bridgeless PFC circuit control method, and device, can solve the problems of increasing the cost of the converter, occupying the space of the converter, affecting the power density of the converter, etc., and achieving the suppression Effects of common mode noise and peak current suppression

Inactive Publication Date: 2021-09-03
BEIJING DYNAMIC POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adding complex auxiliary circuits will increase the cost of the converter, and will also take up more space in the converter, affecting the power density of the converter

Method used

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  • Bridgeless PFC circuit control method and device, electronic equipment and storage medium
  • Bridgeless PFC circuit control method and device, electronic equipment and storage medium
  • Bridgeless PFC circuit control method and device, electronic equipment and storage medium

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Embodiment Construction

[0023] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] figure 1 The PFC circuit shown works in BCM (Boundary Conduction Mode, critical conduction) mode, and within one cycle of the grid input voltage, the conduction time T ON It can be considered as fixed, the input current follows the input voltage change, and the power factor is close to 1. The inductor voltage V during the rising phase of the inductor current ON and its action time T ON The product must be equal to the inductor voltage V during the inductor current drop phase OFF and its action time T OFF ...

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Abstract

One or more embodiments of the invention disclose a bridgeless PFC circuit control method and device, a storage medium and an electronic device. The bridgeless PFC circuit control method comprises the following steps: acquiring a first input voltage of a first voltage input end of a PFC circuit and a second input voltage of a second voltage input end of the PFC circuit; and according to the first input voltage and the second input voltage, controlling the duty ratio of an energy storage switch device and a follow current switch device in the PFC circuit so as to reduce the rising rate of the potential of the second voltage input end before zero crossing of the alternating current input voltage. In an on state, the energy storage switch device is an inductor energy storage switch device in the PFC circuit; and in a conducting state,the follow current switch device is a switch device which enables the inductor to release energy to the load of the PFC circuit. According to the embodiment of the invention, a relatively large step voltage change rate caused by zero crossing of the input voltage can be slowed down, so that peak current generated by the PFC circuit during zero crossing of the input voltage is inhibited.

Description

technical field [0001] The invention relates to the technical field of switching power supplies, in particular to a bridgeless PFC circuit control method, device, electronic equipment and storage medium. Background technique [0002] PFC (Power Factor Correction, power factor correction) converter is an important device for switching power supply to reduce harmonic pollution and reactive power pollution to the power grid, and is widely used in the input stage of switching power supply. The conduction loss of the diode bridge rectifier circuit in the traditional PFC converter limits the improvement of the overall efficiency of the converter. In order to eliminate the increased loss caused by the diode bridge, a bridgeless PFC circuit appears. However, the common-mode conducted noise performance of the bridgeless PFC circuit is not ideal, which hinders the wide application of the converter. Therefore, noise reduction of conducted EMI (Electromagnetic Interference, electromagn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42H02M1/08H02M1/44
CPCH02M1/4208H02M1/08H02M1/44Y02B70/10
Inventor 赵秀峰闫正国李锋
Owner BEIJING DYNAMIC POWER CO LTD
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