PFC (power factor correction) circuit, communication power supply equipment and control method of PFC circuit

A circuit and controller technology, applied in the field of communication, can solve the problem of low utilization of power devices

Active Publication Date: 2014-12-17
HUAWEI DIGITAL POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the positive and negative half cycles of the bridgeless PFC circuit in the prior art are completed by different Boost circuits respectively, and the utilization rate of power devices is low, that is, the prior art sacrifices the circuit cost in order to improve the efficiency

Method used

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  • PFC (power factor correction) circuit, communication power supply equipment and control method of PFC circuit
  • PFC (power factor correction) circuit, communication power supply equipment and control method of PFC circuit
  • PFC (power factor correction) circuit, communication power supply equipment and control method of PFC circuit

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Embodiment Construction

[0077] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0078] image 3 It is a schematic diagram of the circuit structure of Embodiment 1 of the PFC circuit of the present invention, such as figure 2 As shown, this embodiment provides a PFC circuit, which may include an input power supply 1, a PFC inductor 2, an output capacitor 3, a unidirectional switching element assembly 4, and a zero voltage tran...

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Abstract

The embodiment of the invention provides a PFC (power factor correction) circuit, a communication power supply equipment and a control method of the PFC circuit. The PFC circuit comprises an input power supply, a PFC inductor, an output capacitor, a one-way switch element assembly and a ZVT (zero voltage transition) circuit; one end of the PFC inductor is connected with the input power supply, and the other end is connected with one end of the ZVT circuit through the one-way switch element assembly; one end of the output capacitor is connected with the other end of the ZVT circuit, and the other end is connected with the one-way switch element assembly; another end of the ZVT circuit is connected with the input power supply; and all one-way switch elements in the one-way switch element assembly are used for switching on or off alternatively to control the envelope phase of the instantaneous current waveform of the PFC circuit to fit in with the envelope phase of the input waveform of the input power supply and the PFC circuit to work continuously and discontinuously. Due to the adoption of the embodiment of the invention, the cost of the circuit is reduced.

Description

technical field [0001] The invention relates to communication technology, in particular to a PFC circuit, a communication power supply device and a control method for the PFC circuit. Background technique [0002] Energy saving and emission reduction is a trend of global development. Controlling the conversion efficiency of power supply is an important part of energy saving and emission reduction in the communication field. The improvement of power conversion efficiency depends on the improvement of power devices on the one hand, and on the other hand. Improvements in power topology. At present, manufacturers in the industry are devoting themselves to the development of rectifier modules with 96% power conversion efficiency, and at the same time forming some power topologies. At the same time, operators are also improving the access standards for power conversion efficiency. Power conversion efficiency is becoming more and more energy-efficient and accessible. core competit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42
CPCY02B70/126Y02B70/1491Y02B70/10
Inventor 徐明梁永涛顾琳琳
Owner HUAWEI DIGITAL POWER TECH CO LTD
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