Title:
DEVICE TO MEASURE COGGING TORQUE FOR ROTATORS
Document Type and Number:
WIPO Patent Application WO/2013/186871
Kind Code:
A1
Abstract:
When measuring the cogging torque of a test motor from a q-axis current generated by a driving motor when bypassing a torque sensor and directly connecting the test motor to and driving the same with the driving motor, first the q-axis current of the driving motor operating without a load is measured separately under the cogging torque measurement conditions. This q-axis current without a load is subtracted from the q-axis current with a load provided when the test motor is directly connected to and driven by the driving motor and operated under a load so as to remove the q-axis current component caused by the driving motor superimposed as a disturbance. Therefore, a sufficient degree of accuracy can be ensured in the measured value for cogging torque without selectively using as the driving motor a motor having a structure for which the cogging torque component is ideally zero, such as coreless or slotless motors.
Inventors:
NAKAGOME FUMIHIKO (JP)
KOBAYASHI KENJI (JP)
HAGIWARA SHINICHIRO (JP)
KOBAYASHI KENJI (JP)
HAGIWARA SHINICHIRO (JP)
Application Number:
PCT/JP2012/065116
Publication Date:
December 19, 2013
Filing Date:
June 13, 2012
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
NAKAGOME FUMIHIKO (JP)
KOBAYASHI KENJI (JP)
HAGIWARA SHINICHIRO (JP)
NAKAGOME FUMIHIKO (JP)
KOBAYASHI KENJI (JP)
HAGIWARA SHINICHIRO (JP)
International Classes:
G01L5/00; H02P21/00; H02P27/04; H02P29/00
Foreign References:
| JP2005037389A | 2005-02-10 | |||
| JP2001069778A | 2001-03-16 | |||
| JP4676551B1 | 2011-04-27 |
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
Download PDF:
Previous Patent: SERVICE MONITORING SYSTEM AND SERVICE MONITORING METHOD
Next Patent: INSULATING MATERIAL AND HIGH VOLTAGE DEVICE USING SAME
Next Patent: INSULATING MATERIAL AND HIGH VOLTAGE DEVICE USING SAME