Title:
POWER CONVERSION DEVICE AND METHOD FOR CONTROLLING SAME
Document Type and Number:
WIPO Patent Application WO/2020/208829
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a power conversion device capable of suppressing the increase of current flowing through an electric motor even if a voltage command exceeds the amplitude of a carrier wave. In order to achieve the above purpose, the power conversion device controls the drive of an electric motor by converting DC voltage to voltage based on a voltage command by the operation of a switching circuit and is provided with: a modulation wave generator for generating a first modulation wave from the voltage command; and a control signal generator for generating, from the first modulation wave and a carrier wave, a control signal for controlling the operation of the switching circuit. The modulation wave generator is configured so as to generate a rectangular wave based on a voltage command norm as the first modulation wave.
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Inventors:
ONUMA YUSAKU (JP)
SUGIMOTO TAKUYA (JP)
SUGIMOTO TAKUYA (JP)
Application Number:
PCT/JP2019/016059
Publication Date:
October 15, 2020
Filing Date:
April 12, 2019
Export Citation:
Assignee:
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)
International Classes:
H02M7/48; H02P27/08
Domestic Patent References:
| WO2016092603A1 | 2016-06-16 |
Foreign References:
| JP2012095412A | 2012-05-17 | |||
| US20170257043A1 | 2017-09-07 | |||
| JPH10248262A | 1998-09-14 |
Other References:
See also references of EP 3955451A4
Attorney, Agent or Firm:
SEIRYO I.P.C. (JP)
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