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Power factor correction circuit with multiple sets of output voltages

A technology for modifying circuit and group output, which is applied in the direction of output power conversion device, high-efficiency power electronic conversion, electrical components, etc., and can solve problems such as complex circuit structure and increased circuit manufacturing cost

Inactive Publication Date: 2014-01-01
LOGAH TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, the power supply will be equipped with multiple DC converter circuits, resulting in a complex circuit structure, and relatively, it will also increase the production cost of the circuit

Method used

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  • Power factor correction circuit with multiple sets of output voltages

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Embodiment Construction

[0028] In order to have a further understanding and understanding of the structural features of the present invention and the achieved effects, the preferred embodiments and accompanying drawings are used for a detailed description, as follows:

[0029] see figure 1 , which is a block diagram of an embodiment of the power factor correction circuit of the present invention. As shown in the figure, the power factor correction circuit 10 of the present invention includes a coupled inductor unit 12, a first output capacitor 14, a second output capacitor 16, a switch unit 18 and a control unit 20. In addition, the present embodiment The power factor correction circuit 10 further includes a first rectification unit 102 and a second rectification unit 104 , an auxiliary power generation circuit 13 , a voltage dividing unit 22 and an optical isolation feedback circuit 24 . The coupled inductor unit 12 includes a first winding 122 and a second winding 124 , and this embodiment further...

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Abstract

The invention relates to a power factor correction circuit with multiple sets of output voltages. The power factor correction circuit comprises a coupling inductor unit, a first output capacitor, a second output capacitor, a switch unit and a control unit. A first winding and a second winding of the coupling inductor unit generate a first power source and a second power source respectively through a rectification power source provided by a rectification filtering module, and switching on the switch unit is controlled through the control unit according to the second power source. Therefore, according to the power factor correction circuit, the plurality of output power sources can be directly provided, and the manufacturing cost of a next-stage direct current switching circuit is reduced.

Description

technical field [0001] The invention relates to a power supply, in particular to a power factor correction circuit with multiple sets of output voltages. Background technique [0002] Electrical products using diode rectification and filtering circuits have a low power factor due to the electrical characteristics of the equivalent non-linear (Non-Linear) impedance, for example: 0.32, which will cause a large difference between the apparent power of the electrical product and the effective power supplied by the mains. The resistive load is large. Therefore, a power factor correction circuit (Power Factor Correction circuit: PFC) must be installed at the input end of the electrical product to improve the power factor of the electrical product. [0003] Generally speaking, the main function of the power factor correction circuit is to eliminate the harmonic current (Harmonic Current) that is different from the mains voltage frequency, so that the load characteristics of electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42H02M3/28
CPCY02B70/126Y02B70/10
Inventor 潘昱成陈和文苏子龙
Owner LOGAH TECH CORP