Non-bridge APFC active factor power correction circuit

A power correction and circuit technology, applied in the direction of output power conversion devices, electrical components, energy industry, etc., can solve problems such as difficult EMI certification, reduce common mode interference, reduce temperature rise, improve reliability and life Effect
CN107370360AActive Publication Date: 2017-11-21GUANGDONG UNIV OF TECH
5 Cites 25 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGDONG UNIV OF TECH
Publication Date
2017-11-21

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a non-bridge APFC active factor power correction circuit which comprises an AC positive half cycle APFC circuit, an AC negative half cycle APFC circuit, and an AC filter circuit, wherein the AC positive half cycle APFC circuit comprises a first inductor, a first switch tube, a positive half cycle first diode, a positive half cycle second diode, a first capacitor, a first PFC controller and a first DC-DC converter as a load, and the AC negative half cycle APFC circuit comprises a second inductor, a second switch tube, a negative half cycle first diode, a negative half cycle second diode, a second inductor, a second PFC controller and a second DC-DC converter as a load. Compared with conventional non-bridge APFC circuit, the non-bridge APFC active factor power correction circuit has lower loss, and smaller electromagnetic interference.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of active factor power correction, in particular to a bridgeless APFC active factor power correction circuit. Background technique

[0002] In the switching power supply, in order to reduce the distortion of the input current in order to obtain a high power factor PF, a power factor pre-adjustment stage based on Boost topology can be added after the rectifier bridge to form a bridged APFC circuit, which is characterized by EMI (Electromagnetic interference) is small and easy to control, but at any time there are three high-power components in the conduction state, and the loss is large, so that the output power is limited. When the output power is large, in order to reduce the loss of the APFC circuit and reduce the temperature rise of the converter, such as figure 1 In the bridgeless APFC circuit shown, in the bridgeless APFC circuit, only two high-power components are in the conduction state at any time, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More