Seven power level high voltage frequency converter

A high-voltage frequency converter, seven-level technology, applied in transformers/inductor coils/windings/connections, electrical components, AC power input conversion to AC power output, etc., can solve large volume, unfavorable motor insulation, and insufficient withstand voltage And other issues

Active Publication Date: 2008-07-23
XINFENGGUANG ELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0002] With the development of modern power electronic devices, their voltage levels continue to increase, but there are still many defects in using high-voltage power modules directly as high-voltage inverters: 1. The higher the withstand voltage level of the device, the higher the du/dt Large, which is not good for the insulation of the motor; 2. The device is limited by the voltage-resistant material, and it is impossible to increase without

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  • Seven power level high voltage frequency converter
  • Seven power level high voltage frequency converter
  • Seven power level high voltage frequency converter

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Embodiment Construction

[0027] The present invention will be specifically described below in conjunction with the accompanying drawings and embodiments.

[0028] As shown in Figure 1, the three-phase high-voltage 6KV-10KV alternating current is directly sent to the rectifier unit 1 for rectification, passes through the capacitor circuit 2 and the forced voltage equalization circuit 3, and then is sent to the high-voltage inverter unit circuit, and the high-voltage inverter unit directly outputs three-phase High voltage 6KVAC-10KVAC.

[0029] As shown in Figure 2, the rectification circuit structure of the high-voltage inverter with input transformer is: the six secondary windings T2, T3, T4, T5, T6, T7 of the power transformer are connected as follows: T2, T4, T6 are triangular Connection method, T3, T5, T7 are star connection method. The three-phase rectification filter device in group T2 is connected by diodes to form a three-phase bridge type uncontrolled rectification, and capacitor C1 performs ...

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Abstract

The invention relates to the technical field of a multiple level high voltage transducer, in particular to a seven level high voltage transducer which is formed by mixing couplet components and a controlling method. The seven level high voltage transducer of the invention comprises a high voltage rectification circuit, a high voltage capacitance filtering circuit, an equalizer circuit and an inversing circuit which are connected in turn, which is characterized in that the inversing circuit is formed into an inverter through adopting one or two components of IGB and IGCT, adopting the inverter with the structure of diode clamping seven level structure, and three bridge arms of the inverter are same. The transducer of the invention can provide a higher differentiate ratio to a low voltage area of signals, obtain a better harmonious wave characteristic, and the transducer can obtain a better output characteristic to the high voltage area, also obtain a high voltage large power output, and simultaneously the transducer has simple control, safety and reliability.

Description

(1) Technical field [0001] The invention relates to the technical field of multi-level high-voltage frequency converters, in particular to a seven-level high-voltage frequency converter composed of hybrid devices and a control method thereof. (2) Background technology [0002] With the development of modern power electronic devices, their voltage levels continue to increase, but there are still many defects in using high-voltage power modules directly as high-voltage inverters: 1. The higher the withstand voltage level of the device, the higher the du / dt Large, which is not good for the insulation of the motor; 2. The device is limited by the voltage-resistant material, and it is impossible to increase it without limit. At present, high-voltage inverters generally use the method of adding a phase-shifting transformer at the input end to solve the problem of insufficient withstand voltage of the device. However, due to the phase-shifting transformer at the input end, the loss...

Claims

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Application Information

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IPC IPC(8): H02M5/458H02M7/5395H01F27/28
CPCH02M7/487
Inventor 何洪臣李瑞来胡顺全
Owner XINFENGGUANG ELECTRONICS TECH CO LTD
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