Title:
ELECTRIC MOTOR MONITORING DEVICE AND ELECTRIC MOTOR MONITORING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/032182
Kind Code:
A1
Abstract:
Provided is an electric motor monitoring device for estimating a torque without obtaining an iron loss resistance. The electric motor monitoring device comprises: a magnetic flux calculation unit (131) for calculating the stator interlinkage magnetic flux of an electric motor (7) from a stator voltage, a stator current, and a stator phase resistance; a total torque calculation unit (132) for calculating a total torque from the stator interlinkage magnetic flux, the stator current, and the number of pole pairs; no-load loss torque calculation unit (133) for calculating a total loss from a rated output and a rated efficiency, calculating a primary copper loss from a stator phase resistance and a rated three-phase current effective value, calculating a secondary copper loss from a rated slip and the rated output, and calculating a no-load loss torque from the total loss, the primary copper loss, the secondary copper loss, and a rated rotation angle speed; and an estimated torque calculation unit (134) for calculating an estimated torque from the total torque and the no-load loss torque.
Inventors:
MIYAUCHI TOSHIHIKO (JP)
MIYOSHI MASAHITO (JP)
KANEMARU MAKOTO (JP)
FURUTANI SHINICHI (JP)
MIYOSHI MASAHITO (JP)
KANEMARU MAKOTO (JP)
FURUTANI SHINICHI (JP)
Application Number:
PCT/JP2021/032583
Publication Date:
March 09, 2023
Filing Date:
September 06, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P23/14; H02P21/20; H02P23/08
Foreign References:
| JP2001186794A | 2001-07-06 | |||
| JPH07167928A | 1995-07-04 | |||
| JP2016116273A | 2016-06-23 | |||
| JP2002027774A | 2002-01-25 | |||
| JPH05236607A | 1993-09-10 |
Attorney, Agent or Firm:
PALMO PATENT FIRM, P.C. (JP)
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