PFC flyback full-bridge-based intelligent modified-wave voltage conversion circuit

A conversion circuit and intelligent technology, applied in the direction of high-efficiency power electronic conversion, output power conversion device, electrical components, etc., can solve the problems of low PF value, low output voltage quality, poor safety and reliability, etc.

Inactive Publication Date: 2017-05-31
GUANGDONG BESTEK E COMMERCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the current AC-AC portable equipment market is a non-isolated topol...

Method used

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  • PFC flyback full-bridge-based intelligent modified-wave voltage conversion circuit
  • PFC flyback full-bridge-based intelligent modified-wave voltage conversion circuit
  • PFC flyback full-bridge-based intelligent modified-wave voltage conversion circuit

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Embodiment Construction

[0019] The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

[0020] The invention discloses an intelligent modified wave voltage conversion circuit based on PFC flyback full bridge, combining Figure 1 to Figure 3 As shown, it includes:

[0021] An input unit 10 for outputting DC voltage;

[0022] A PFC step-up unit 20, connected to the output end of the input unit 10, for boosting the output voltage of the input unit 10;

[0023] A flyback isolated converter unit 30, including a first switch tube Q6, a transformer T1, a first rectifier diode D5 and a first electrolytic capacitor C3, the first end of the primary winding of the transformer T1 is connected to the PFC boost unit 20 The output terminal of the primary winding of the transformer T1 is connected to the drain of the first switching tube Q6, the source of the first switching tube Q6 is connected to the front-end ground, and the gate of the first ...

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Abstract

The invention discloses a PFC flyback full-bridge-based intelligent modified-wave voltage conversion circuit, which comprises an input unit, a PFC booster unit, a flyback isolation converter unit and an inverse inverter unit, wherein the flyback isolation converter unit comprises a first switch tube, a transformer, a first rectifier diode and a first electrolytic capacitor; a first end of a primary winding of the transformer is connected to an output end of the PFC booster unit; a second end of the primary winding of the transformer is connected to a drain of the first switch tube; a source of the first switch tube is connected to front-end ground; the first end of a secondary winding of the transformer is connected to an anode of the first rectifier diode; the second end of the secondary winding of the transformer is connected to rear-end ground; a cathode of the first rectifier diode is taken as an output end of the flyback isolation converter unit; and the inverse inverter unit is used for carrying out inverse conversion on output voltage of the flyback isolation converter unit and then outputting AC. According to the PFC flyback full-bridge-based intelligent modified-wave voltage conversion circuit, the PF value can be improved and the quality of the output voltage can be improved.

Description

technical field [0001] The invention relates to a voltage conversion circuit, in particular to an intelligent modified wave voltage conversion circuit based on a PFC flyback full bridge. Background technique [0002] In the prior art, the intelligent buck-boost conversion device from AC to AC is also called a travel plug-in strip. In this device, the modified wave voltage conversion circuit is the key circuit, which is a circuit that can realize AC-AC conversion. In the AC-AC conversion, it can realize the functions of step-up and step-down and stabilize the voltage and frequency. However, most of the current AC-AC portable equipment market is a non-isolated topology circuit with low PF value, low output voltage quality, and poor safety and reliability. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an intelligent modified wave voltage conversion circuit based on PFC flyback full bridge to improve the PF value ...

Claims

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Application Information

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IPC IPC(8): H02M5/458
CPCH02M5/4585Y02B70/10Y02P80/10
Inventor 何伟
Owner GUANGDONG BESTEK E COMMERCE CO LTD
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