Title:
ESTIMATION DEVICE AND METHOD OF DRIVING ALTERNATING CURRENT MOTOR
Document Type and Number:
WIPO Patent Application WO/2021/038670
Kind Code:
A1
Abstract:
This estimation device (9) comprises a phase current determination unit (12), a time difference calculation unit (13), and an estimation unit (15). The phase current determination unit (12) performs a determination process for determining a plurality of phase current values on the basis of a bus bar current value detected by a bus bar current detection unit (11) and states of a plurality of gate pulse signals. The time difference calculation unit (13) calculates the time difference between a first current detection time specified as a detection time of a bus bar current used in a previous determination process by the phase current determination unit (12) and a second current detection time specified as a detection time of a bus bar current used in a current determination process by the phase current determination unit (12). The estimation unit (15) estimates at least one of the position and the speed of an alternating current motor (1) on the basis of the plurality of phase current values determined by the phase current determination unit (12) and the time difference calculated by the time difference calculation unit (13).
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Inventors:
TAKAHASHI KENJI (JP)
TOYODOME SHINYA (JP)
KASHIMA MITSUO (JP)
KUTSUKI TOMOHIRO (JP)
TOYODOME SHINYA (JP)
KASHIMA MITSUO (JP)
KUTSUKI TOMOHIRO (JP)
Application Number:
PCT/JP2019/033182
Publication Date:
March 04, 2021
Filing Date:
August 23, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H02P21/18; H02P21/24; H02P27/06
Foreign References:
| JP2015139359A | 2015-07-30 | |||
| JP2015198546A | 2015-11-09 | |||
| JP2008263667A | 2008-10-30 | |||
| JP2012070532A | 2012-04-05 |
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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