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PFC module

A technology of power switch tube and rectifier diode, applied in the field of power supply circuit, can solve the problem of low AC-DC conversion efficiency, and achieve the effect of reducing hardware cost, reducing power loss, and simplifying PCB design and processing

Active Publication Date: 2019-09-06
HISENSE (GUANGDONG) AIR CONDITIONER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this circuit design is that the AC-DC conversion efficiency is low

Method used

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Embodiment Construction

[0024] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.

[0025] It should be noted that, in the description of the present invention, terms such as "left", "right" and other indicated directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, rather than Nothing to indicate or imply that a device or element must have a particular orientation, be constructed, and operate in a particular orientation should therefore be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying r...

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Abstract

The invention discloses a PFC module. The PFC module comprises a shell and a bridge-type rectification circuit, wherein the bridge-type rectification circuit is formed by connecting four rectificationdiodes, a power switch tube is connected in parallel with each of an upper bridge rectification diode and lower bridge rectification diodes, the lower bridge rectification diodes are connected with the upper bridge rectification diode, a sampling resistor is connected between positive electrodes of the lower bridge rectification diodes, PFC control is performed by a PFC control algorithm according to a voltage signal of an AC power supply and a current signal of a current signal sampling point, and the purpose of power factor correction is achieved. In the PFC module, the power factor correction circuit and the rectification circuit are shared, an independent PFC circuit link is omitted, the circuit loss is reduced, so that the AC-DC power conversion efficiency is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of power supply circuits, and in particular relates to a PFC module. Background technique [0002] In order to meet the energy-saving requirements of home appliances, frequency conversion products have been developed rapidly. Most of the power supply circuits of current frequency conversion products need to go through the power conversion process from AC→DC→AC. During the conversion process, the phase difference between the current and voltage will cause the loss of conversion power. At this time, a power factor correction circuit is needed. Improve the power factor of the power circuit. [0003] The power factor correction circuit, that is, the PFC (Power Factor Correction) circuit, is used to control the current waveform so that it is synchronized with the input voltage waveform. Traditional PFC module, its circuit such as figure 1 As shown, the main components including inductor L1, boost diode D5, swi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42
CPCH02M1/4225Y02B70/10
Inventor 王斌
Owner HISENSE (GUANGDONG) AIR CONDITIONER
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