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Combined type full-bridge three-level DC converter and full-bridge three-level DC converter

A three-level inverter and composite technology, applied in the direction of conversion equipment without intermediate conversion to AC, can solve problems such as rectifier voltage spikes, eliminate voltage oscillations and voltage spikes, improve conversion efficiency, and eliminate losses Effect

Inactive Publication Date: 2007-12-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is also the problem of voltage spikes on the rectifier caused by the reverse recovery of the output rectifier.

Method used

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  • Combined type full-bridge three-level DC converter and full-bridge three-level DC converter
  • Combined type full-bridge three-level DC converter and full-bridge three-level DC converter
  • Combined type full-bridge three-level DC converter and full-bridge three-level DC converter

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Embodiment Construction

[0016] Accompanying drawing 1-2 narrates the circuit composition structure of the present invention, and accompanying drawing 1 is the ZVS composite full-bridge three-level DC converter structure diagram with clamping diode, and accompanying drawing 2 is the ZVS with clamping diode Schematic diagram of the structure of a full-bridge three-level DC converter. With the zero-voltage switching composite full-bridge three-level DC transformer with clamping diode shown in Figure 1

[0017] Taking the converter as an example, it consists of input voltage dividing capacitor circuit 1, three-level inverter bridge arm circuit 2, two-level inverter bridge arm circuit 3, isolation transformer 4, rectifier bridge and filter circuit 5, and clamping circuit 6. where the voltage divider capacitor C d1 and C d2 The capacity is large and equal, and its voltage is the input voltage V in half of the V cd1 =V cd2 =V in / 2, which can be regarded as a voltage of V in / 2 voltage source. Four ...

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Abstract

A zero potential switch composite full bridge three level dc converter and full bridge three level de converter with clamping diode, which contains input voltage division capacitor, three level bridge arm, two level bridge arm, isolation transformer, and rectifying and filtering circuit. Said invention is characteristic of that the primary side winding of isolation transformer is connected with three level inversion bridge arm, resonant inductance is connected with two level inversion bridge arm, the clamping circuit is composed of two clamping diodes led from the primary side winding and resonant inductance and connected to the positive and negative bus bar of converter dc input. The invented two converters are adoptive to wide voltage input with reduced high frequency component in output rectified current wave shape, reduced output filter inductance. Eliminated voltage oscillation, reduced voltage stress and reduced loss due to backward recovery of output rectifying diode.

Description

Technical field [0001] The composite full-bridge three-level DC converter and the full-bridge three-level DC converter of the present invention are also called the zero-voltage switching composite full-bridge three-level DC converter with clamping diode and the full-bridge three-level DC converter. Converter is a DC converter of electric energy conversion device. Background technique [0002] In recent years, the application of three-level DC converters in high-voltage applications has received widespread attention because the voltage stress of its switch tube is only half of the input voltage. In order to improve efficiency and reduce the weight and volume of the converter, many soft-switching three-level DC converter circuit topologies have appeared in recent years. The zero-voltage switching three-level DC converter realizes soft switching of the switching tube through the leakage inductance of the transformer and the junction capacitance of the switching tube. Two of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/06
Inventor 陈武阮新波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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