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Small-power APFC circuit

A low-power, circuit technology, used in output power conversion devices, DC power input conversion to DC power output, electrical components and other directions, can solve the problem of unreasonable matching of control chips, improve power factor, and ensure safety and stability. running effect

Inactive Publication Date: 2018-05-25
ENN ENERGY SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

APFC technology for high-power applications is relatively mature, but APFC technology for small and medium-power applications is still in the research and development stage
However, the active power factor correction topology and the matching control chip are unreasonable

Method used

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Embodiment Construction

[0070] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0071] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element refe...

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Abstract

The invention proposes a small-power APFC circuit, and the circuit comprises a Boost main circuit and a control circuit. The control circuit comprises a control chip, and is used for carrying out thecalculation and compensation of the collected data in the control chip in a preset current control mode through collecting an output voltage of the Boost main circuit and a main loop current and voltage after rectification, and obtaining a final modulation signal, so as to drive a power-level MOS tube according to the final modulation signal, and to enable an input current of the Boost main circuit to follow an input voltage without distortion and phase difference. The circuit can effectively reduce the harmonic dangers, and guarantees the safe and stable operation of a power grid.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a low-power APFC circuit. Background technique [0002] With the rapid development of power electronic technology, a large number of power electronic devices have been used in various electrical equipment, which makes harmonic current more and more serious. These factors not only make the harmonic current pollute the business environment, but also seriously pollute military enterprises and family environment. The serious consequence caused by a large number of harmonics is that the power factor at the input terminal drops sharply, which in turn leads to the reduction of the power supply quality of the grid. Improving the power factor is a requirement for saving energy, improving power quality, and ensuring safe and stable operation of the power system. Therefore, it is very important to use power factor correction technology to improve power factor in electrical equip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156H02M1/42H02M1/12
CPCH02M1/12H02M1/4208H02M3/156H02M3/1566Y02B70/10
Inventor 徐前程
Owner ENN ENERGY SERVICE
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