Electric motor torque estimation

Details Electric motor torque estimation Electric motor torque estimation

2010-08-26

2011-12-20

Ip, Paul (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400020, C318S400390, C318S432000

Reexamination Certificate

active

08080956

ABSTRACT:
A method of controlling a vehicle including a permanent magnet (PM) synchronous motor is provided. The motor is calibrated such that for each torque command, there are corresponding direct-axis (d-axis) and quadrature axis (q-axis) current commands. The method includes establishing a torque command T*. D-axis and q-axis current commands Id* and Iq*, respectively, corresponding to the torque command T* are determined. The motor is controlled based on Id* and Iq*. D-axis and q-axis currents Id and Iq, respectively, are measured. An output torque is estimated as a sum of the torque command T* and a torque difference. The torque difference is determined as a function of Id*, Iq*, Id, and Iq. The vehicle may be controlled based on the estimated output torque.

REFERENCES:
patent: 6674262 (2004-01-01), Kitajima et al.
patent: 6741060 (2004-05-01), Krefta et al.
patent: 6850033 (2005-02-01), Gallegos-Lopez et al.
patent: 7017377 (2006-03-01), Hosoito et al.
patent: 7242163 (2007-07-01), Gallegos-Lopez et al.
patent: 7403404 (2008-07-01), Oka et al.
patent: 7586286 (2009-09-01), Cheng et al.
patent: 7733051 (2010-06-01), Tsui et al.
patent: 2002/0097015 (2002-07-01), Kitajima et al.
patent: 2002/0145837 (2002-10-01), Krefta et al.
patent: 2006/0006825 (2006-01-01), Inaguma et al.
patent: 2006/0215429 (2006-09-01), Oka et al.
patent: 2008/0116842 (2008-05-01), Cheng et al.
patent: 2009/0179602 (2009-07-01), Hayashi et al.
patent: 2009/0237014 (2009-09-01), Yamada
patent: 2010/0001671 (2010-01-01), Yamada et al.
patent: 2010/0109584 (2010-05-01), Kwon et al.
patent: 1014554 (2000-06-01), None
patent: 1401093 (2004-03-01), None
patent: 2007066182 (2007-06-01), None
Mohamed et al., “Performance of modified direct torque controlled induction motor drives”, Alexandria Engineering Journal, vol. 40, No. 1, Jan. 2001, pp. 45-54.

Affiliated with

Also associated with

Rating

Electric motor torque estimation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electric motor torque estimation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric motor torque estimation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4300215