Title:
ELECTRIC POWER STEERING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2011/077589
Kind Code:
A1
Abstract:
An electrical angle estimation unit (110) calculates an estimated electrical angle (θeb') on the basis of an induced voltage (e) generated by a motor (20), and obtains an estimated electrical angle (θeb) by correcting the estimated electrical angle (θeb') with an electrical angle correction amount (Δθc). An electrical angle correction amount calculation unit (118) calculates the electrical angle correction amount (Δθc), based on a detection value (eγ/e) that indicates the difference in state of the electrical angles of the q-axis and δ-axis and that was calculated by an electrical angle error detection unit (117), such that the electrical angle of the δ-axis will fall into a setting angle area (A) that is delayed more than that of the q-axis. This enables the step-out phenomenon of the motor (20) to be alleviated, when conducting sensor-less control.
More Like This:
Inventors:
YANAI KOHEI (JP)
Application Number:
PCT/JP2009/071888
Publication Date:
June 30, 2011
Filing Date:
December 25, 2009
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
YANAI KOHEI (JP)
YANAI KOHEI (JP)
International Classes:
B62D5/04; B62D6/00; H02P6/06; H02P6/08; H02P6/10; H02P6/16; H02P6/18; H02P6/182; H02P6/28; H02P21/00; H02P21/05; H02P21/14; H02P21/18; H02P21/20; H02P21/22; H02P21/24; H02P23/04; H02P23/14; H02P27/04; H02P27/06; H02P27/08; B62D101/00; B62D113/00; B62D119/00
Foreign References:
| JP2008037399A | 2008-02-21 | |||
| JP2009291072A | 2009-12-10 | |||
| JP2005296095A | 2005-10-27 | |||
| JP2008037399A | 2008-02-21 |
Other References:
See also references of EP 2518890A4
Attorney, Agent or Firm:
PROSPEC PATENT FIRM (JP)
Patent business corporation Pros Peck patent firm (JP)
Patent business corporation Pros Peck patent firm (JP)
Download PDF: