Title:
モータ駆動装置及び冷凍サイクル適用機器
Document Type and Number:
Japanese Patent JP6877626
Kind Code:
B2
Abstract:
In a motor driving apparatus having an inverter which can drive n (n being an integer not smaller than 2) motors each having a permanent magnet in its rotor, and a connection switching device for switching the connection state of the n motors, the connection switching device is operated to change the number of the motors connected to the inverter thereby to change the impedance as seen from the inverter towards the motors. When i (i being any of 2 to n) motors among the n motors are concurrently driven by the inverter, the voltage outputted by the inverter may be controlled such that the inductance values of the i motors are identical. It is possible to prevent hunting and step-out due to the phase difference between the motors driven by the inverter.
Inventors:
Hatakeyama Kazunori
Uemura Keisuke
Yuichi Shimizu
Uemura Keisuke
Yuichi Shimizu
Application Number:
JP2020503162A
Publication Date:
May 26, 2021
Filing Date:
February 28, 2018
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02P5/46; F25B1/00
Domestic Patent References:
| JP2004187487A | ||||
| JP2012231671A |
Attorney, Agent or Firm:
Youichi Yamagata
Kenkai Sato
Masahiko Shinohara
Minoru Maeda
Kenkai Sato
Masahiko Shinohara
Minoru Maeda