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Interlaced single-phase active power factor correction circuit

A technology for calibrating circuits and source power, applied in the electronic field, can solve problems such as difficult power device selection and matching parameters, complex heat dissipation treatment, low system efficiency, etc., and achieve the effect of novel design concept, strong versatility, and strong flexibility

Inactive Publication Date: 2012-02-08
上海诚跃电气科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the traditional single-phase power factor correction scheme of low-power inverter air conditioners is no longer suitable for this power level, and has brought many disadvantages: it is quite difficult to select and match parameters for power devices, the heat dissipation treatment is very complicated, the system efficiency is low, and the cost increases significantly

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Embodiment 1

[0034] see figure 1 , the present invention discloses an interleaved single-phase active power factor correction circuit, including a rectifier circuit 1 , a chopper circuit 2 and an energy storage circuit 3 .

[0035] In this embodiment, the rectification circuit 1 is composed of three single-phase rectifiers B1, B2, B3, an AC capacitor C1 and a resistor R1. The chopper circuit 2 is composed of three groups of interleaved structures, wherein the first group of interleaved structures includes three inductors L1, L2, L3, three AC capacitors C1, C2, C3 and three power switches S1, S2, S3, and the second The interleaved structure includes three inductors L4, L5, L6, three AC capacitors C4, C5, C6 and three power switches S4, S5, S6, and the third interleaved structure includes three inductors L7, L8, L9, three AC capacitors C7, C8, C9 and three power switches S7, S8, S9. The energy storage circuit is composed of an AC capacitor C2, an electrolytic capacitor E1 and a resistor R2...

Embodiment 2

[0046] Aiming at the difficulty of improving the power level of single-stage power factor correctors, the present invention designs an interleaved structure, multi-group interleaved rectifier circuits that support greater power output and a time-sharing working principle, which can be applied to all existing power factor control strategies and applications It has the advantages of fresh concept, high power level and high efficiency.

[0047] The interleaved single-phase active power factor correction circuit of the present invention includes a rectification circuit, a chopper circuit and an energy storage circuit. Among them, the rectifier circuit includes three single-phase diode uncontrolled rectifiers, which input single-phase AC sinusoidal voltage and output sinusoidal half-wave voltage. The output produces a sinusoidal half-wave current with ripple, and the input produces a single-phase AC sinusoidal current. In the chopper circuit, there are three groups of interleaved ...

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Abstract

The invention discloses an interlaced single-phase active power factor correction circuit. The correction circuit comprises a rectification circuit, a chopper circuit and a tank circuit, wherein the rectification circuit, the chopper circuit and the tank circuit are successively connected. The rectification circuit comprises several single-phase rectifiers, inputs a single-phase alternating-current (ac) sinusoidal voltage and outputs a sinusoidal half-wave voltage. And an output terminal generates a sinusoidal half-wave current with ripple and an input terminal generates a single-phase ac sinusoidal current. The chopper circuit comprises several groups of interlaced structure chopper boost structures. When a power switch conducts, an inductor stores energy. When the power switch turns off, the inductor releases the energy. The several groups of interlaced structures work by turns. Continuous working time is a standard sinusoidal half wave. In the invention, based on a basic principle of the traditional single-phase active power factor correction, a design scheme of single-phase active power factor correction with the interlaced structure and multi-group interlace is designed and manufactured. The single-phase active power factor correction design scheme is suitable for larger output power. A design concept is novel. Versatility is strong. And the design has many other characteristics. A structure is simple, costs are low and flexibility is strong.

Description

technical field [0001] The invention belongs to the field of electronic technology, and relates to a power factor correction circuit, in particular to an interleaved single-phase active power factor correction circuit. Background technique [0002] The application of frequency converter powered by single-phase AC power supply is more and more extensive, including frequency conversion air conditioner. [0003] At present, the power level of high-power inverter air conditioners is getting bigger and bigger, reaching more than 10kW. Therefore, the traditional single-phase power factor correction scheme of low-power inverter air conditioners is no longer suitable for this power level, and has brought many disadvantages: it is quite difficult to select and match parameters for power devices, the heat dissipation treatment is very complicated, the system efficiency is low, and the cost increases significantly. [0004] In order to avoid and solve this problem, a power factor cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42
CPCY02B70/10
Inventor 杨进宝杨兴华张启平吴秦强
Owner 上海诚跃电气科技有限公司
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