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Power conversion device

A technology of power conversion device and power converter, which is applied in the direction of output power conversion device, emergency protection circuit device, electrical components, etc., to achieve the effect of simple structure

Active Publication Date: 2019-05-21
TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the power conversion device described above, when any of the plurality of semiconductor switching elements is damaged and short-circuited, there is a possibility that an overcurrent or an overvoltage may occur.

Method used

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Examples

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Embodiment Construction

[0026] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code|symbol is attached|subjected to the same or corresponding part in the following figure, and this description is not repeated in principle.

[0027] figure 1 It is a schematic block diagram showing the main circuit configuration of the power conversion device 100 according to the embodiment of the present invention. The power conversion device 100 according to the embodiment of the present invention is applied to, for example, an uninterruptible power supply device. The AC power supply 1 supplies three-phase AC power of a commercial frequency to the power conversion device 100 . The load 4 is driven by three-phase AC power of a commercial frequency supplied from the power conversion device 100 .

[0028] refer to figure 1 , the power conversion device 100 includes three converter units U1 to U3 connected in parallel between the AC p...

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Abstract

Wiring (WP1, WN1, WC1) is provided between the DC bus bars (PL1, NL1, CL1) of a first converter unit (U1) and the DC bus bars (PL2, NL2, CL2) of a second converter unit (U2). Wiring (WP2, WN2, WC2) isprovided between the DC bus bars (PL2, NL2, CL2) of the second converter unit (U2) and the DC bus bars (PL3, NL3, CL3) of a third converter unit (U3). Fuses (FP1, FN1, FC1) are inserted into the wiring (WP1, WN1, WC1). Fuses (FP2, FN2, FC2) are inserted into the wiring (WP2, WN2, WC2).

Description

technical field [0001] The present invention relates to power conversion devices. Background technique [0002] A power conversion device applied to an uninterruptible power supply device generally includes a converter for converting AC power from a commercial AC power supply into DC power, and an inverter for converting the DC power into AC power of a desired frequency and voltage. [0003] For example, International Publication No. 2010 / 095241 (Patent Document 1) discloses an uninterruptible power supply device including a power conversion device including a three-level converter and a three-level inverter. In this power conversion device, each of the three-level converter and the three-level inverter includes a plurality of semiconductor switching elements. [0004] In the power conversion device described above, when any of the plurality of semiconductor switching elements is damaged and short-circuited, there is a possibility that an overcurrent or an overvoltage may o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/458
CPCH02M5/4585H02M7/487H02M1/32H02H7/1216H02M5/458
Inventor 西村一辉中野俊秀
Owner TOSHIBA MITSUBISHI-ELECTRIC IND SYST CORP
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