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Zero valtage switch compound crisscross parallel two-tube positive shock three-level DC inverter

A technology of zero-voltage switching and dual-transistor forward, which is applied in the direction of converting DC power input to DC power output, converting AC power input to DC power output, and adjusting electrical variables. It can solve the problem of reducing the reliability of the converter and increasing the complexity of the circuit. Sex and other issues to achieve the effect of improving reliability

Inactive Publication Date: 2008-04-02
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these three-level converters all have the danger of bridge arm shoot-through, which reduces the reliability of the converter. It is necessary to set the dead time of the switch tube and add a protection circuit to prevent bridge arm shoot-through, which increases the complexity of the circuit.
Therefore, it is not suitable for applications that require high reliability of the converter.

Method used

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  • Zero valtage switch compound crisscross parallel two-tube positive shock three-level DC inverter
  • Zero valtage switch compound crisscross parallel two-tube positive shock three-level DC inverter
  • Zero valtage switch compound crisscross parallel two-tube positive shock three-level DC inverter

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Embodiment Construction

[0013] Accompanying drawing 1 is the structure schematic diagram of zero-voltage switching composite dual-transistor forward three-level DC converter. It consists of an input voltage dividing capacitor circuit 1, a three-level bridge arm circuit 2, a two-level bridge arm circuit 3, a high-frequency isolation transformer circuit 4, and a rectification and filter circuit 5. Two-way double-tube forward converter interleaved parallel circuit, one route input voltage dividing capacitor circuit, power switch tube Q 1 , Q 2 , Q 6 , Diode D 3 、D 4 、D 6 、D f3 、D f4 , high frequency isolation transformer T r Primary winding N P1 and resonant inductance L r1 A two-tube forward converter is formed; it consists of an input voltage dividing capacitor circuit, a power switch tube Q 3 , Q 4 , Q 5 , Diode D 1 、D 2 、D 6 、D f3 、D f4 , high frequency isolation transformer T r Primary winding N P1 and resonant inductance L r1 Form another dual-tube forward converter. It is cha...

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Abstract

A DC inverter of electric energy inversion device is featured as using a high frequency isolated transformer commonly by two routes of double - barreled positive excitation inverters , connecting one end of two primary edge windings on said transformer to three level bridge arm and another end to two level bridge arm . Each bridge arm is formed by connecting backward diode with switching tube in series so there is no problem of power being directly connected through for bridge type of three level inverter raising so as to greatly raise the reliability of inverter.

Description

1. Technical field [0001] The invention relates to a zero-voltage switch composite interleaved parallel double-transistor forward three-level direct-current converter, which belongs to the direct-current converter of an electric energy conversion device. 2. Background technology [0002] With the development of power electronics technology, the requirements for power converters are getting higher and higher, especially the requirements for input power factor are getting higher and higher. After three-phase power factor correction, the output voltage of the circuit can generally reach 760~800V, sometimes even 1000V, which requires the voltage rating of the switch tube of the subsequent stage DC converter to be increased, making it difficult to choose a suitable power switch tube. In 1992, Brazilian scholar Pinheiro proposed a zero-voltage switching three-level DC converter. The voltage stress of the switching tube of the converter is half of the input DC voltage, so it is sui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/28H02M3/335H02M7/5387
Inventor 王慧贞毛赛君龚春英严仰光
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS