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Method for controlling double-direction power flow high-frequency isolated active clamping rectifier

A high-frequency isolation and control method technology, which is applied in the direction of output power conversion device, AC power input conversion to DC power output, electrical components, etc., can solve problems such as voltage overshoot and oscillation, reduce electromagnetic interference, improve The effect of work efficiency

Active Publication Date: 2014-02-19
SOUTHEAST UNIV
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Problems solved by technology

[0003] Many scholars have proposed a high-frequency isolated inverter with dual power flow directions, but there are few literatures that propose a high-frequency isolated converter that works as a rectifier mode, including its circuit, modulation method, and control strategy.
Some people have initially proposed a single-phase dual-power flow high-frequency isolated rectifier, but there are problems such as voltage overshoot and oscillation.

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  • Method for controlling double-direction power flow high-frequency isolated active clamping rectifier
  • Method for controlling double-direction power flow high-frequency isolated active clamping rectifier
  • Method for controlling double-direction power flow high-frequency isolated active clamping rectifier

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

[0021] Such as figure 1 As shown, the main circuit structure of bidirectional power flow high-frequency isolation active clamp rectifier includes: the primary side cycloconverter composed of bidirectional switches, the primary side active clamp circuit composed of full bridge circuit and diode, the secondary side H-bridge circuit and resonant inductor.

[0022] figure 2 It is the structure diagram of the rectifier with the primary side cycloconverter in the full-wave connection mode. The rectifier adopts a three-winding transformer with one winding on the secondary side and two windings on the primary side. On the primary side of the transformer, the bidirectional switch S 5 S 6 , S 7 S 8 The outputs are connected to the transformer primary winding N 2 Point C of the terminal of the same name and the primary winding N 3 The heteronym end point E, the bid...

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Abstract

The invention discloses a method for controlling a double-direction power flow high-frequency isolated active clamping rectifier. Through modulation conducted on a transformer primary side frequency converter and an active clamping circuit and modulation conducted on an auxiliary side H bridge circuit, the originally existing problem of voltage overshooting and oscillation of the rectifier of the type is solved, no-voltage switch-on and switch-off of all switches can be achieved, the operation efficiency is further improved, and electromagnetic interference is reduced. According to the method for controlling the double-direction power flow high-frequency isolated active clamping rectifier, closed-loop control is conducted on an output voltage, and a stable direct-current voltage is output by the rectifier on the resistor load condition or the rectifier load condition or the input alternating voltage fluctuation condition.

Description

technical field [0001] The invention relates to a bidirectional power flow high-frequency isolation active clamp rectifier, which belongs to the power electronic conversion technology. Background technique [0002] Compared with the thyristor phase-controlled rectifier isolated from the power frequency transformer, the high-frequency isolated PWM rectifier has the characteristics of small size, light weight, low noise and low cost. The conventional high-frequency isolated AC / DC converter is composed of AC / DC / HFAC / DC three-stage conversion, because the middle stage is a diode rectifier circuit, so the power is unidirectional. At the same time, due to the large number of power conversion levels, the efficiency is reduced; the large capacitance of the DC bus will reduce the reliability. The bidirectional high-frequency link rectifier adopts AC / HFAC / DC two-stage conversion, and does not require a large capacitor of the DC bus. The high-frequency isolated rectifier can be widel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/219H02M1/14
Inventor 程明朱文杰周克亮
Owner SOUTHEAST UNIV
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