Bridgeless power factor correction (PFC) circuit

A circuit and bridge arm technology, applied in the field of bridgeless PFC circuits, can solve the problems of low conversion efficiency and low power density of bridgeless PFC circuits, and achieve the effect of improving power conversion efficiency and power density, high power density and small size

Inactive Publication Date: 2018-08-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a bridgeless PFC circuit to s

Method used

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  • Bridgeless power factor correction (PFC) circuit
  • Bridgeless power factor correction (PFC) circuit
  • Bridgeless power factor correction (PFC) circuit

Examples

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Example Embodiment

[0022] The present invention will be described in detail below with reference to the drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, but do not limit the present invention.

[0023] The embodiment of the present invention provides a bridgeless PFC circuit, including:

[0024] AC power supply, boosting inductor, autotransformer, at least two groups of switching bridge arms, bus capacitors; each group of said switching bridge arms includes a bridge arm midpoint and at least two bridge arm end points; said autotransformer includes at least two One output end; one end of the boost inductor is connected to the AC power source, and the other end is connected to the input end of the autotransformer; each output end of the autotransformer is connected to a bridge The arm midpoints are connected, and the bridge arm end points of each group of the switch bridge arms are respectively connected to different end poi...

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Abstract

The invention discloses a bridgeless power factor correction (PFC) circuit, relates to the technical field of power electronics and is used for solving the problems of relatively low conversion efficiency and power density of the bridgeless PFC in the prior art. The circuit comprises an AC power supply, a boost inductor, a self-coupling transformer, at least two groups of switch bridge arms and abus capacitor, wherein each group of switch bridge arm comprises a bridge arm middle point and at least two bridge arm end points, the self-coupling transformer comprises at least two output ends, oneend of the boost inductor is connected with the AC power supply, the other end of the boost inductor is connected with an input end of the self-coupling transformer, each output end of the self-coupling transformer is connected with the bridge arm middle point of one of the two groups of switch bridge arms, and the bridge arm end points of each group of switch bridge arm are connected with different end points of the bus capacitor.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a bridgeless PFC circuit. Background technique [0002] In the field of power electronic AC rectification technology, especially power factor correction, the currently popular topology of the AC-DC converter is bridgeless PFC (Power Factor Correction, power factor correction). The industry has derived various improved bridgeless PFC topologies from the traditional bridgeless PFC topology. However, the inductance ripple current of the boost inductor in the existing interleaved parallel bridgeless PFC circuit is large, and the inductor volume is large; at the same time, the current flowing through the switch The effective value of the current of the tube is large, and the conversion efficiency of the circuit is low. Therefore, the existing bridgeless PFC circuit has low conversion efficiency and low power density. Contents of the invention [0003] The technical probl...

Claims

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Application Information

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IPC IPC(8): H02M1/42H02M1/15
CPCH02M1/15H02M1/4233H02M1/42Y02B70/10
Inventor 胡永辉
Owner ZTE CORP
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