Title:
POWER CONVERSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/097838
Kind Code:
A1
Abstract:
The purpose of this invention is to solve problems with existing technologies such as the problem that if a motor ends up running freely due to a momentarily increased DC voltage, the applicability thereof is restricted, and the problem that if output is interrupted during deceleration, the regenerative capacity of a power conversion device is limited, restricting the applicability thereof. This power conversion device is provided with a DC-voltage unit that smooths a DC voltage, a power conversion unit that converts said DC voltage to an AC voltage, an output control unit that controls the output of said power conversion unit, and a DC-voltage detection unit that detects the voltage across the DC-voltage unit. If and when the voltage detected by the DC-voltage detection unit exceeds a first threshold, the output control unit interrupts the output of the power conversion unit. Also, if the voltage detected by the DC-voltage detection unit exceeds a second threshold without exceeding the aforementioned first threshold, said second threshold being lower than the first threshold, the output control unit interrupts the output of the power conversion unit depending on the point in time at which said voltage exceeded said second threshold.
Inventors:
ARAO YUSUKE (JP)
TANABE KEISUKE (JP)
TANABE KEISUKE (JP)
Application Number:
PCT/JP2013/085032
Publication Date:
July 02, 2015
Filing Date:
December 27, 2013
Export Citation:
Assignee:
HITACHI IND EQUIPMENT SYS (JP)
International Classes:
H02M7/48
Domestic Patent References:
| WO2010055568A1 | 2010-05-20 |
Foreign References:
| JP2012070573A | 2012-04-05 | |||
| JP2001119933A | 2001-04-27 | |||
| JP2008141390A | 2008-06-19 | |||
| JP2011188581A | 2011-09-22 |
Attorney, Agent or Firm:
INOUE, Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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