Title:
ELECTRIC POWER CONVERTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/092304
Kind Code:
A1
Abstract:
With the aim of improving the reliability of an electric power converting device for driving a motor, this electric power converting device is provided with a rectifying portion for rectifying an alternating current and outputting a direct current voltage, a smoothing capacitor for smoothing the direct current voltage, an inverter portion into which the direct current voltage is input and which outputs alternating-current power, an inverter drive portion for outputting a gate signal to the inverter portion, a regenerative braking portion connected in parallel with the smoothing capacitor, a regenerative braking drive portion for outputting a gate signal to the regenerative braking portion, a control portion for outputting drive signals to the inverter drive portion and the regenerative braking drive portion, a regenerative braking overcurrent detecting portion for outputting an overcurrent detection signal if the current flowing through the regenerative braking portion exceeds a determination value, and a latch portion into which the overcurrent detection signal output from the regenerative braking overcurrent detecting portion is input and which outputs a gate output interruption signal to the control portion, wherein the configuration is such that switching elements of the inverter portion and the regenerative braking portion are stopped in the off state if the regenerative braking overcurrent detecting portion detects an overcurrent.
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Inventors:
SATO FUMIHIRO (JP)
TANABE KEISUKE (JP)
TAKATA NAOKI (JP)
MATSUMOTO DAISUKE (JP)
YAGIHARA SHIGETOSHI (JP)
HIRAGA MASAHIRO (JP)
TANABE KEISUKE (JP)
TAKATA NAOKI (JP)
MATSUMOTO DAISUKE (JP)
YAGIHARA SHIGETOSHI (JP)
HIRAGA MASAHIRO (JP)
Application Number:
PCT/JP2021/040173
Publication Date:
May 05, 2022
Filing Date:
October 29, 2021
Export Citation:
Assignee:
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)
International Classes:
H02P3/18; H02M7/72
Foreign References:
| JPS61214781A | 1986-09-24 | |||
| JP2008252966A | 2008-10-16 | |||
| JPH0360390A | 1991-03-15 | |||
| JPH0398472A | 1991-04-24 | |||
| JP2002315352A | 2002-10-25 |
Attorney, Agent or Firm:
SEIRYO I.P.C. (JP)
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