Title:
CONTROL DEVICE FOR ALTERNATING-CURRENT MOTOR
Document Type and Number:
WIPO Patent Application WO/2018/131397
Kind Code:
A1
Abstract:
An inverter (20) converts direct-current power into alternating-current power by operating PWM-controlled multiple switching components (21 through 26) and supplies the alternating-current power to an alternating-current motor (80). A feedback control operation section (40) of an inverter control unit (30) performs a control operation in each (N/2) period (N is a natural number) of a triangular wave carrier used for the PWM control by using current values Iv_smp, Iw_smp, which are acquired from current sensors (87, 88) for detecting a current flowing in the alternating-current motor (80), and a rotation angle θ of the alternating-current motor (80). During the acquisition of the current values detected by the current sensors (87, 88), a mean value acquisition part (50) calculates a mean value of current values in a half period of the carrier, that is, a period between a peak and a valley of the carrier, or acquires a current value at a timing at which an assumed mean value of the current values can be acquired.
Inventors:
FUJISHIMA YUYA (JP)
Application Number:
PCT/JP2017/045505
Publication Date:
July 19, 2018
Filing Date:
December 19, 2017
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H02M7/48; H02P27/08
Foreign References:
| JP2016092989A | 2016-05-23 | |||
| JP2008182832A | 2008-08-07 | |||
| JP2012110074A | 2012-06-07 | |||
| JP2013154793A | 2013-08-15 |
Attorney, Agent or Firm:
HATTORI Masaki (JP)
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