Soft-switch PWM interleaving shunt-wound two-transistor forward power converter

A forward converter and soft switching technology, applied in the direction of conversion equipment without intermediate conversion to AC, high-efficiency power electronic conversion, climate sustainability, etc., can solve the problems of low reliability of voltage stress and reduce the on-state Loss, effect of increasing conversion efficiency and converter power density

Inactive Publication Date: 2006-02-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to aim at the defect of above-mentioned converter, develop a kind of soft-switching PWM interleaving parallel double-tube forward converter, to overcome the defect that existing converter exists, realize the soft switching of switch tube and keep double-tube forward While the converter has the advantages of low voltage stress and high reliability, the converter does not have a circulating current state, reduces the on-state loss, and improves the conversion efficiency and converter power density

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  • Soft-switch PWM interleaving shunt-wound two-transistor forward power converter
  • Soft-switch PWM interleaving shunt-wound two-transistor forward power converter
  • Soft-switch PWM interleaving shunt-wound two-transistor forward power converter

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Embodiment Construction

[0010] attached figure 1 It is a schematic diagram of the structure of a soft-switching PWM interleaved parallel dual-transistor forward converter. attached figure 2 It is a schematic diagram of the structure of a soft-switching PWM interleaved series double-transistor forward converter. to attach figure 1 Take the soft-switching PWM interleaved parallel dual-transistor forward converter as an example, which is composed of two dual-transistor forward converters interleaved in parallel. A routing power supply V in The anode is connected to the first power switch tube Q 1 Drain, power switch tube Q 1 The source is connected to the high frequency isolation transformer T r The first primary winding N P1 The leakage inductance of the first transformer connected to the terminal of the same name L r1 , high frequency isolation transformer T r The first primary winding N P1 The opposite terminal is connected to the second power switch tube Q 2 drain, whose source is connec...

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Abstract

The soft-switch PWM alternate-parallel dual-tube normal excitation converter belongs to DC converter in electric conversion device. Wherein, the one-way dual-tube normal excitation converter comprises source Vin, power switches Q1 and Q2, clamping diode DC1 and DC2, primary first winding NP1 of high-frequency isolating converter Tr and a first transformer leakage inductance Lr1; similarly, the another one-way dual-tube normal excitation converter comprises corresponding Vin, Q3 and Q4, DC3 and DC4, NP2 of Tr and Lr2; the output filter circuit comprises output rectifier diodes DR1 and DR2, output filter inductance Lf and output filter capacitor Cf. This invention keeps the ad vantage of low voltage stress and high reliability, increases the utility of magnetic core, needs no any active or passive circuit to realize the soft switch, has no circulation state to decrease on-state loss.

Description

1. Technical field [0001] The soft-switching PWM interleaved parallel double-tube forward converter of the invention belongs to a DC converter of an electric energy conversion device. 2. Background technology [0002] DC / DC converters suitable for high-voltage input and high-power applications include full-bridge converters and dual-tube forward converters. The full-bridge converter is easy to realize the soft switching of the switching tube, but there is a danger of the bridge arm passing through, which reduces the reliability of the converter. Reliability is the lifeline of all power electronic devices, especially for aviation power supplies. The dual-tube forward converter has the inherent ability to resist bridge arm shoot-through, and has high reliability. However, the duty cycle of the dual-tube forward converter can only be less than 0.5, and the transformer core works in the first quadrant of the magnetization curve, and it is not easy to realize. Soft switching ma...

Claims

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Application Information

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IPC IPC(8): H02M3/04
CPCY02B70/1491Y02B70/10
Inventor毛赛君王慧贞冀春英严仰光
OwnerNANJING UNIV OF AERONAUTICS & ASTRONAUTICS