A Composite Power Factor Correction Circuit

A power factor correction and power circuit technology, applied in the direction of output power conversion devices, electrical components, high-efficiency power electronic conversion, etc., can solve the problems of high cost, power device selection and installation difficulties, etc., to reduce the overall cost and benefit Effect of miniaturization design and multiplication of ripple frequency

Active Publication Date: 2016-12-21
上海儒竞自动化设备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a composite power factor correction circuit for solving the problems of difficult selection and installation of power devices and high cost in the existing power factor correction circuit

Method used

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  • A Composite Power Factor Correction Circuit
  • A Composite Power Factor Correction Circuit

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Embodiment Construction

[0029] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0030] see figure 1 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, term...

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Abstract

Provided in the invention is a composite power factor correction circuit comprising a power circuit and a control circuit. The control circuit is connected with the power circuit and is used for generating M*N-path phase-shift drive pulse signals and inputting the signals into the power circuit. The power circuit includes a rectifier bridge, M boost inductors, and an electrolytic capacitor; the output terminal of each boost inductor is respectively with N power devices; a positive terminal of the electrolytic capacitor is connected with a common terminal of negative output terminals of M backward fast recovery diodes to form a second positive output terminal; and a negative terminal of the electrolytic capacitor is connected with an emitter common terminal of M*N power devices to form a second negative output terminal. Besides, the control circuit includes a voltage outer-loop controller, M current inner-loop controllers, and a carrier generator; and each of the current inner-loop controllers is connected with N phase-shift comparison drivers. According to the invention, the power level can be effectively improved; the boost inductor design is simplified; the model selection and installation of the power devices can be realized conveniently; and the total cost is lowered.

Description

technical field [0001] The invention relates to the technical field of power electronic devices, in particular to a power factor correction circuit, in particular to a composite power factor correction circuit. Background technique [0002] Single-phase active power factor corrector (APFC) has been widely used in frequency conversion household appliances such as frequency conversion air conditioners, and is used as the pre-stage circuit of the AC-DC converter, that is, the AC-DC converter. With the trend of increasing the power of frequency conversion air conditioners in some applications, it is necessary to develop high-power single-phase APFCs with corresponding power levels. So far, the following alternative circuits have emerged: (1) multi-stage interleaved APFC; (2) single-stage APFC, considering parallel connection of power devices; (3) single-stage APFC, selecting high-power devices. [0003] The first solution: the advantage is that the power can be shared between A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42
CPCY02B70/10
Inventor 刘明霖朱俊杨喜军吴伦兵田雨朱元庆
Owner 上海儒竞自动化设备有限公司
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