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Intelligent corrective wave voltage conversion circuit based on PFC (power factor correction) forward half-bridge

A conversion circuit, intelligent technology, applied in high-efficiency power electronic conversion, output power conversion device, energy industry, etc., can solve problems such as low PF value, poor safety and reliability, and low quality of output voltage

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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  • Intelligent corrective wave voltage conversion circuit based on PFC (power factor correction) forward half-bridge
  • Intelligent corrective wave voltage conversion circuit based on PFC (power factor correction) forward half-bridge
  • Intelligent corrective wave voltage conversion circuit based on PFC (power factor correction) forward half-bridge

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Embodiment Construction

[0021] The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

[0022] The invention discloses an intelligent modified wave voltage conversion circuit based on PFC forward half-bridge, combining Figure 1 to Figure 5 As shown, it includes:

[0023] An input rectification and filtering unit 10, the input end of which is connected to the power grid for rectifying and filtering the power grid voltage;

[0024] A PFC step-up unit 20, connected to the output end of the input rectification filter unit 10, for boosting the output voltage of the input rectification filter unit 10;

[0025] An isolated two-tube forward converter 30, including a first switching tube Q6, a second switching tube Q7, a first diode D3, a second diode D2, a third diode D5, a fourth diode Tube D8, transformer T1 and filter inductance L3, the drain of the first switch tube Q6 is connected to the output end of the PFC step-up unit 20, the so...

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Abstract

The invention discloses an intelligent corrective wave voltage conversion circuit based on a PFC (power factor correction) forward half-bridge. The circuit comprises an input rectifier filter unit, a PFC voltage boosting unit, an isolated two-transistor forward converter and an inversion reverse-phase unit, wherein the isolated two-transistor forward converter comprises a first switch tube, a second switch tube, a first diode, a second diode, a third diode, a fourth diode, a transformer and a filter inductor, a source of the first switch tube is connected to a first end of a transformer primary winding, a second end of the transformer primary winding is connected with a drain of the second switch tube, a grid of the first switch tube and a grid of the second switch tube are used for accessing the same PWM (pulse width modulation) signals, the first end of the transformer primary winding is connected to an anode of the third diode, the rear end of the filter inductor is taken as an output end positive pole of the isolated two-transistor forward converter, and an anode of the fourth diode is taken as an output end negative pole of the isolated two-transistor forward converter. With the adoption of the circuit, PF (power factor) value and output voltage quality 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 forward half-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 a safe and reliable intelligent correction wave voltage based on PFC forward half-bridge that can improve the PF ...

Claims

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Application Information

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IPC IPC(8): H02M5/458H02M3/335H02M7/5387H02M1/42H02M7/5395H02M1/32
CPCH02M1/32H02M1/4225H02M3/3353H02M5/458H02M7/5387H02M7/5395H02M1/0038Y02B70/10Y02P80/10
Inventor 侯涛廖志刚
Owner GUANGDONG BESTEK E COMMERCE CO LTD
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