PFC dual-full-bridge-based intelligent sine wave voltage conversion circuit

A voltage conversion circuit and intelligent technology, applied in the direction of high-efficiency power electronic conversion, output power conversion devices, electrical components, etc., can solve problems such as difficulty in meeting conversion requirements, low output voltage quality, and low PF value.

Inactive Publication Date: 2017-03-22
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.
In practical applications, due to the high-speed switching of the swi

Method used

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  • PFC dual-full-bridge-based intelligent sine wave voltage conversion circuit
  • PFC dual-full-bridge-based intelligent sine wave voltage conversion circuit
  • PFC dual-full-bridge-based intelligent sine 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 sine wave voltage conversion circuit based on PFC double full bridge, combining Figure 1 to Figure 3 As shown, it includes an input rectifying and filtering unit 10 for rectifying and filtering the grid voltage, a PFC boost unit 20 for boosting the output voltage of the input rectifying and filtering unit 10, and:

[0021] A full-bridge DC-to-DC isolation converter unit 30 includes a first switching tube Q6, a second switching tube Q7, a transformer T1, a first rectifier bridge (D5, D6, D7, D8), an eighth switching tube Q8, a first switching tube Q8, and a first switching tube Q8. Nine switching tubes Q9 and a first electrolytic capacitor C3, the drain of the first switching tube Q6 is connected to the output terminal of the PFC boost unit 20, the source of the first switching tube Q6 is connected to...

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Abstract

The invention discloses a PFC dual-full-bridge-based intelligent sine wave voltage conversion circuit. The intelligent sine wave voltage conversion circuit comprises an input rectifying and filtering unit, a PFC voltage boosting unit, a full-bridge DC-to-DC isolation converter unit, an inversion phase reversal unit and a filtering inductor, wherein the full-bridge DC-to-DC isolation converter unit comprises a first switching tube, a second switching tube, a transformer, a first rectifying bridge, an eighth switching tube, a ninth switching tube and a first electrolytic capacitor; the inversion phase reversal unit is connected to the output end of the full-bridge DC-to-DC isolation converter unit for performing inversion conversion on the output voltage of the full-bridge DC-to-DC isolation converter unit and then outputting an alternating current; the front end of the filtering inductor is connected to the output end of the inversion phase reversal unit while the back end of the filtering inductor is connected with a load; and the filtering inductor is used for filtering high-frequency pulse and providing power frequency sine alternating current for the load. By adoption of the PFC dual-full-bridge-based intelligent sine wave voltage conversion circuit, the output voltage quality can be improved, and the high-frequency pulse in the output signal can be filtered.

Description

technical field [0001] The invention relates to a voltage conversion circuit, in particular to an intelligent sine wave voltage conversion circuit based on a PFC double 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 sine wave voltage conversion circuit topology is its key circuit, which is a circuit that can realize AC-AC conversion. , can realize the function of buck-boost 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. In practical applications, due to the high-speed switching of the switching tube during the voltage conversion process, there will be a certain high-frequency pulse signal on the output side of the circuit, which will affect the quality of the ou...

Claims

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Application Information

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IPC IPC(8): H02M5/458H02M3/335H02M1/42
CPCH02M1/42H02M3/33523H02M5/458Y02B70/10
Inventor 廖志刚
Owner GUANGDONG BESTEK E COMMERCE CO LTD
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