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Resistance, capacitance and diode resetting positive excitation converter with double diodes

A technology of forward converter and diode, which is applied in the direction of converting AC power input to DC power output, electrical components, output power conversion devices, etc., can solve problems such as inappropriateness, achieve wide conversion range, high conversion efficiency, switch The effect of low voltage stress

Inactive Publication Date: 2007-09-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this dual-tube forward converter has its fatal disadvantage: it can only work in a state where the duty cycle is less than 50%, so it is not suitable for applications with a very wide conversion range.
[0006] So this dual-tube forward converter can only work in the region where the duty cycle is less than 50%

Method used

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  • Resistance, capacitance and diode resetting positive excitation converter with double diodes
  • Resistance, capacitance and diode resetting positive excitation converter with double diodes
  • Resistance, capacitance and diode resetting positive excitation converter with double diodes

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Embodiment Construction

[0029] Referring to Fig. 4, Fig. 4 is a specific circuit diagram of the RCD reset dual-transistor forward converter of the present invention. It includes the DC power supply V in , Transformer T R , the first main switch S 1 , the second main switch S 2 , the first main switch S 1 The drain is connected to the positive pole of the DC power supply, the source is connected to one end of the primary winding of the transformer, and the second main switch S 2 The source is connected to the negative pole of the DC power supply, the drain is connected to the other end of the primary winding of the transformer, and the positive pole of the power supply and the second main switch S 2 The contact between the drain and the primary winding of the transformer indirectly has a first reset branch 110, and the first reset branch is formed by the resistor R 1 and capacitance C 1 in parallel with the diode D 1 series circuit in which the diode D 1 The positive pole of the second main sw...

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Abstract

A resistance, capacitance and diode resetting positive excitation converter with double diodes comprises a DC power supply, a transformer, two main switches, wherein the drain of the first main switch is connected with the positive source of the power supply, the second resetting branch line is a diode, or the first resetting branch line is a diode, the second resetting branch is a series circuit of parallel resistor and capacitor, the source pole is connected with one end of the primary side of the transformer, wherein the source pole of the second main switch is connected with the negative source of the power supply, the drain is connected with the other end of the primary side of the transformer, the auxiliary side of the transformer is connected with the rectification circuit.

Description

technical field [0001] The present invention relates to a resistor, capacitor, diode (referred to as RCD) reset dual-transistor forward converter, more particularly, it relates to a power supply device including a DC / DC converter. Background technique [0002] The prior art resistor, capacitor, diode (referred to as RCD) reset single-transistor forward converter as shown in Fig. 1 has a simple structure and a duty cycle greater than 50%, which is suitable for a wide range of low-cost applications. However, the voltage stress of the main switch S is relatively large, usually more than twice the input voltage, so it is not suitable for high-voltage input applications. In addition, its reset method is an energy-consuming reset method, and its excitation energy is finally consumed on the resistor R. The reset resistor R needs to use a resistor with relatively high power, which not only increases the volume of the converter, but also greatly reduces t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/162
Inventor 顾亦磊吕征宇钱照明顾晓明
Owner ZHEJIANG UNIV
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