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Power Factor Correction Circuit

A power factor correction and circuit technology, which is applied in the direction of output power conversion devices, electrical components, high-efficiency power electronics conversion, etc., can solve the problems of low switching frequency, high cost, and poor current harmonic suppression effect of power correctors, etc., to achieve Good power factor correction effect, good current harmonic suppression effect, and reduced switching frequency effect

Active Publication Date: 2017-10-13
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low switching frequency of this power corrector, a large inductor is required, so the cost is high, and its current harmonic suppression effect is poor
Some companies have proposed a fast-switching power factor corrector, which uses an average current algorithm to realize fast switching control of the IGBT, and has good power factor correction and current harmonic suppression effects. The operating frequency is higher, so the switching loss is larger, and the temperature rise of the switching device is higher

Method used

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Embodiment Construction

[0031] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0032] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0033] figure 1 A schematic structural diagram of a power factor correction circuit according to an embodiment of the present invention is shown.

[0034] like figure 1 As shown, the power factor ...

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Abstract

The present invention provides a power factor correction circuit, including: a switch assembly, the switch assembly includes a plurality of switching devices connected in parallel; a sampling circuit for collecting current parameter information in the power factor correction circuit and voltage parameter information; a controller, connected to the sampling circuit, and respectively connected to the control terminals of the plurality of switching devices, according to the voltage parameter information and the current parameter information respectively sent to the plurality of switching devices control signals to enable the plurality of switching devices to work alternately. Through the technical scheme of the invention, the switching frequency of a single switching device is greatly reduced, thereby greatly reducing the temperature rise of the switching device and improving the reliability of the switching device.

Description

technical field [0001] The present invention relates to the technical field of power factor correction, in particular to a power factor correction circuit. Background technique [0002] In order to reduce the pollution of current harmonics and reactive power generated by electrical equipment to the power grid, my country has promulgated national standards to limit the current harmonics of electrical equipment, and electrical equipment can only enter the market if it meets the corresponding harmonic standards. In order to use electrical equipment to meet harmonic standards, power factor correction (Power Factor Correction, PFC) needs to be performed on it. [0003] In order to improve the power factor of electrical appliances and reduce current harmonics, some companies have proposed a power factor corrector that performs chopping on the AC side. The step-up switch operates several times to achieve the purpose of increasing the current conduction angle and reducing the input...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42H02M1/12
CPCH02M1/12H02M1/4208H02M1/0054Y02B70/10
Inventor 张国柱
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD