Title:
DRIVE APPARATUS, COMPRESSOR, AND AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2020/105131
Kind Code:
A1
Abstract:
A drive apparatus (100a) drives a motor (1) having a rotor provided with a neodymium rare earth magnet. The drive apparatus (100a) is provided with: an inverter (103) that drives the motor (1) at variable speed by performing weak magnetic field control; a first detection unit (201) that outputs a first detection signal (D1) corresponding to a motor drive current to be supplied to the motor (1); a protection level setting unit (70) that sets an overcurrent protection level; a second detection unit (202) that outputs a second detection signal (D2) corresponding to the drive state of the motor (1); and a control device (500). Immediately after the motor drive current corresponding to the first detection signal has exceeded the overcurrent protection level, the control device (500) performs first control for lowering the motor drive current. When the protection level setting unit (70) lowers the overcurrent protection level to a new current level on the basis of the second detection signal, the control device (500) performs second control for lowering the motor drive current to a level lower than the new current level.
Inventors:
NIGO MASAHIRO (JP)
Application Number:
PCT/JP2018/042930
Publication Date:
May 28, 2020
Filing Date:
November 21, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P6/08
Foreign References:
| JP2013255373A | 2013-12-19 | |||
| JP2014018070A | 2014-01-30 | |||
| JP2012196142A | 2012-10-11 | |||
| JP2007006613A | 2007-01-11 |
Attorney, Agent or Firm:
YAMAGATA Yoichi et al. (JP)
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