Title:
INDUCED VOLTAGE SUPPRESSION DEVICE, MOTOR SYSTEM, AND POWER CONVERSION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/030031
Kind Code:
A1
Abstract:
The present invention addresses the problem of enability to achieve three-phase short-circuit and to suppress induced voltage when a switching element of an inverter does not operate normally due to a failure or the like.
An induced voltage suppression device 3 is connected to three-phase wires between a power conversion device 1 and a motor 2 electrically in parallel with respect to the power conversion device 1. A rectifier circuit 31 is configured by a three-phase diode bridge circuit. A DC voltage source 32 is configured by a capacitor C2. A voltage detection circuit 33 detects a voltage across the DC voltage source 32. When a transistor Tr of the voltage detection circuit 33 is turned on, transistors T1-T3 are turned on, whereby a short circuit 34 performs a three-phase short-circuit operation and suppresses the induced voltage of the motor 2. Since a DC voltage is ensured as a driving source in a self-excited manner due to the induced voltage of the motor 2, the induced voltage suppression device 3 can suppress the induced voltage even when an abnormality occurs in the power conversion device 1.
Inventors:
YUKUTAKE SEIGO (JP)
MIYAZAKI HIDEKI (JP)
HOSHINO KATSUHIRO (JP)
MIYAZAKI HIDEKI (JP)
HOSHINO KATSUHIRO (JP)
Application Number:
PCT/JP2017/024426
Publication Date:
February 15, 2018
Filing Date:
July 04, 2017
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
H02M7/48; H02P29/028
Foreign References:
| JP2010200490A | 2010-09-09 | |||
| JP2006115667A | 2006-04-27 |
Other References:
See also references of EP 3499704A4
Attorney, Agent or Firm:
TODA Yuji (JP)
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