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Motor inverter based on chopper for power compensation

A power compensation and chopper technology, applied in the field of frequency converters, can solve the problems of the DC voltage drop of the frequency converter, insufficient power supply, and failure to reach the output power, etc., and achieve the effect of rationally utilizing energy and improving the quality and stability of power supply.

Inactive Publication Date: 2016-10-12
GUANGZHOU TOSHIBA BAIYUN RYOKI POWER ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Inverter, as a kind of power electronic equipment that efficiently regulates the operation of the motor, has been widely used in various industries. When the load of the motor suddenly increases (for example, when the crane is accelerating and hoisting), if the power supply at the input side of the rectification part of the inverter is insufficient, it may It will cause the internal DC voltage of the inverter to drop, and the output power required for production cannot be reached.

Method used

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  • Motor inverter based on chopper for power compensation
  • Motor inverter based on chopper for power compensation

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Embodiment Construction

[0020] The present invention will be further elaborated below in conjunction with accompanying drawing, wherein, the direction of the present invention is with figure 1 as standard.

[0021] Such as figure 1 with figure 2 As shown, the motor frequency converter based on the chopper for power compensation of the present invention includes a rectifier circuit 2, a filter circuit 3, an inverter circuit 4, a DC chopper 5, a current suppression circuit 6, a first protection circuit 8, a second Protection circuit 9 and control unit 10, wherein:

[0022] The main power input unit 1 is used to connect to a three-phase power supply (mains) to provide a working voltage to the motor 11. The main power input unit 1 includes three output terminals R, S and T.

[0023] The rectification circuit 2 is used to rectify the alternating current connected to the main power input unit 1 to rectify the alternating current into direct current. The rectification circuit 2 includes 6 IGBT units, na...

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Abstract

The invention discloses a motor inverter based on a chopper for power compensation, which comprises a first protection circuit for playing a protection role at an AC input end, a rectification circuit for rectifying AC into DC, a filtering circuit for carrying out filtering processing on DC after rectification, an inverter circuit for carrying out inverter processing on DC after rectification and converting the DC into AC with adjustable frequency, a second protection circuit for playing a protection role at a DC input end, a DC chopper for adjusting DC voltage of an external DC power supply to what is needed by the inverter circuit, and a control unit for sampling and calculating output power at output ends of the rectification circuit, the inverter circuit and the DC chopper and comparing the output power of the inverter circuit and the output power of the rectification circuit to realize control on the operation of the DC chopper.

Description

technical field [0001] The present invention relates to a frequency converter, in particular to a frequency converter using a chopper as power compensation, which can use a backup or auxiliary power supply to supply power to the DC side of the frequency converter when the input power of the frequency converter is insufficient, even A motor inverter based on a chopper for power compensation that can be powered by a DC microgrid to meet the output power requirements. Background technique [0002] Inverter, as a kind of power electronic equipment that efficiently regulates the operation of the motor, has been widely used in various industries. When the load of the motor suddenly increases (for example, when the crane is accelerating and hoisting), if the power supply at the input side of the rectification part of the inverter is insufficient, it may It will cause the internal DC voltage of the inverter to drop, and the output power required for production cannot be reached. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/06H02M5/458H02M1/14H02H7/12
CPCH02P27/06H02H7/1216H02M1/143H02M5/4585
Inventor 曾光
Owner GUANGZHOU TOSHIBA BAIYUN RYOKI POWER ELECTRONICS