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Control method of bidirectional full-bridge DC/DC converter circuit and suppression magnetic biasing

A converter and circuit technology, used in control/regulation systems, DC power input conversion to DC power output, instruments, etc., can solve the problems of circuit loss, resistance heating, slow adjustment speed, etc., to eliminate DC bias, suppress The effect of bias

Inactive Publication Date: 2019-03-08
HEFEI KEWELL POWER SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The limitation of this method is that the adjustment speed of the bias through the resistance is slow, and the resistance is too large to cause serious heating of the resistance and serious circuit loss

Method used

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  • Control method of bidirectional full-bridge DC/DC converter circuit and suppression magnetic biasing
  • Control method of bidirectional full-bridge DC/DC converter circuit and suppression magnetic biasing
  • Control method of bidirectional full-bridge DC/DC converter circuit and suppression magnetic biasing

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Embodiment Construction

[0020] The solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Such as figure 1 As shown, the bidirectional full-bridge DC / DC converter circuit includes a high-frequency transformer T with a transformation ratio of n 1 , the high frequency transformer T 1 The primary side and the inductance L s The series connection is connected to form a bridge structure switch tube Sa1 to Sa4, and the secondary side connection is connected to form a bridge structure switch tube Sb1 to Sb4. The switch tubes Sa1 to Sa4 and the switch tubes Sb1 to Sb4 are all anti-parallel diodes.

[0022] A DC terminal Vin is connected between the upper and lower bridge arms of the primary side, and a load circuit in which a capacitor C and a resistor R are connected in parallel is connected between the upper and lower bridge arms of the secondary side.

[0023] The present invention also provides a bidirectiona...

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PUM

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Abstract

The invention belongs to the field of the bidirectional full-bridge DC / DC converter circuit control, and especially relates to a control method of bidirectional full-bridge DC / DC converter circuit magnetic biasing. The control method comprises the following steps: performing closed-loop regulation on an AC side current average value of a circuit, and adjusting the duty cycle of a circuit secondaryside according to closed-loop regulation. Through the control method disclosed by the invention, the secondary side AC side voltage is adjusted within short time through the closed-loop control on the AC side current, so that the AC side current can quickly recover to the steady-state current, the DC bias of the recovery process is reduced and then eliminated, the control method has important significance for the application of the bidirectional full-bridge DC / DC converter circuit in a power change occasion.

Description

technical field [0001] The invention relates to a bidirectional full-bridge DC / DC converter circuit and a control method for suppressing dynamic DC bias of the bidirectional full-bridge DC / DC converter circuit. Background technique [0002] As one of the most commonly used topologies at home and abroad, the bidirectional full-bridge DC / DC circuit has been widely used due to its high power density, small volume and weight, and high power transmission efficiency, especially in medium and large power applications. common. [0003] Bidirectional full bridge DC / DC circuits contain high frequency transformers. High-frequency transformers are power transformers with a working frequency exceeding 10kHz, and are mainly used as high-frequency switching power transformers in high-frequency switching power supplies. High-frequency transformers can efficiently realize the functions of power transmission, step-up and step-down, and electrical isolation, and are important energy conversi...

Claims

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/33584
Inventor 唐德平
Owner HEFEI KEWELL POWER SYST CO LTD
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