Title:
空気調和機
Document Type and Number:
Japanese Patent JP6918818
Kind Code:
B2
Abstract:
A motor driving device that is a device for driving a motor (2) including stator windings, includes: a connection switching unit (3) that includes relays (31 to 33) as mechanical switches connected to the stator windings and excitation coils opening or closing the relays (31 to 33) by being energized or non-energized with excitation current and switches connection condition of the stator windings to either of first connection condition (star connection) and second connection condition (delta connection) different from the first connection condition by opening or closing the relays (31 to 33); and an inverter (1) that supplies AC drive voltages to the stator windings.
Inventors:
Uemura Keisuke
Takashi Yamakawa
Kenji Iwasaki
Koichi Arisawa
Atsushi Tsuchiya
Takashi Yamakawa
Kenji Iwasaki
Koichi Arisawa
Atsushi Tsuchiya
Application Number:
JP2018547066A
Publication Date:
August 11, 2021
Filing Date:
October 31, 2016
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02P25/18; F24F11/88; H02P27/06
Domestic Patent References:
| JP2006246674A | ||||
| JP63234885A | ||||
| JP57180582A | ||||
| JP1080152A | ||||
| JP4355697A | ||||
| JP201328877A | ||||
| JP194856U |
Attorney, Agent or Firm:
Youichi Yamagata
Kenkai Sato
Masahiko Shinohara
Minoru Maeda
Kenkai Sato
Masahiko Shinohara
Minoru Maeda