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PFC and LLC resonance-based intelligent full-bridge correction wave voltage conversion circuit

A technology for converting circuit and wave voltage, which is applied in the field of intelligent full-bridge modified wave voltage conversion circuit, can solve problems such as low PF value, low output voltage quality, and poor safety and reliability, so as to improve PF value, improve output voltage quality, and realize The effect of isolating transmissions

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

AI Technical Summary

Problems solved by technology

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.

Method used

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  • PFC and LLC resonance-based intelligent full-bridge correction wave voltage conversion circuit
  • PFC and LLC resonance-based intelligent full-bridge correction wave voltage conversion circuit
  • PFC and LLC resonance-based intelligent full-bridge correction 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 full-bridge modified wave voltage conversion circuit based on PFC and LLC resonance, combining Figure 1 to Figure 3 As shown, it includes:

[0021] An input rectification unit 10, the input end of which is connected to the power grid for rectifying the power grid voltage;

[0022] A filter unit 20, connected to the output end of the input rectification unit 10, for filtering the voltage output by the input rectification unit 10;

[0023] A PFC step-up unit 30, connected to the output end of the filter unit 20, used for step-up conversion of the voltage output by the filter unit 20;

[0024] An LLC isolation converter unit 40 includes a first switching tube Q6, a second switching tube Q7, a first freewheeling diode D6, a second freewheeling diode D5, a transformer T1, a resonant capacitor C4 and a d...

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Abstract

The invention discloses a PFC and LLC resonance-based intelligent full-bridge correction wave voltage conversion circuit, which comprises an input rectifier unit, a filter unit, a PFC booster unit and an LLC isolating converter unit, wherein the LLC isolating converter unit comprises a first switch tube, a second switch tube, a first fly-wheel diode, a second fly-wheel diode, a transformer, a resonant capacitor and a discharge resistor; a drain of the first switch tube is connected to an output end of the PFC booster unit; a source of the first switch tube is connected to a first end of the transformer; a second end of the transformer is connected with front-end ground through the resonant capacitor; the drain of the second switch tube is connected to the source of the first switch tube; the source of the second switch tube is connected with the front-end ground through the discharge resistor; and a center tap of a secondary winding of the transformer is taken as the output end of the LLC isolating converter unit. According to the PFC and LLC resonance-based intelligent full-bridge correction wave voltage conversion circuit, the PF value of a voltage conversion device can be improved, the quality of output voltage can be improved and a safe and reliable effect can be achieved.

Description

technical field [0001] The invention relates to a voltage conversion circuit, in particular to an intelligent full-bridge modified wave voltage conversion circuit based on PFC and LLC resonance. 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 topology of PFC, LLC and full-bridge modified wave voltage conversion circuit is the key circuit, and it is a kind of device that can realize The AC-AC conversion circuit can realize the functions of step-up and down and stabilize voltage and frequency in AC-AC conversion. 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 full-bridge modified wave voltage conversion circui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/458H02M1/42
CPCH02M1/4241H02M5/458Y02B70/10
Inventor 廖志刚
Owner GUANGDONG BESTEK E COMMERCE CO LTD
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