US 7,321,214 B2
Motor control system
Shigeru Kobayashi, Toyohashi (Japan); and Keizo Ishizu, Hamamatsu (Japan)
Assigned to ASMO Co., Ltd., Shizuoka-pref. (Japan)
Filed on Nov. 02, 2006, as Appl. No. 11/591,512.
Claims priority of application No. 2005-322459 (JP), filed on Nov. 07, 2005; and application No. 2006-229611 (JP), filed on Aug. 25, 2006.
Prior Publication US 2007/0103820 A1, May 10, 2007
Int. Cl. H02P 1/04 (2006.01)
U.S. Cl. 318—471  [318/470; 388/800; 388/831; 361/25; 361/33; 713/320; 714/51; 714/55] 7 Claims
OG exemplary drawing
 
1. A motor control system comprising:
a motor that is powered by an electric power supplied from a vehicle electric power source;
a control apparatus that controls an operation of the motor; and
an ambient temperature sensing apparatus that senses an ambient temperature around the motor, wherein:
the control apparatus includes an estimated temperature computing means for computing an estimated temperature of the motor;
the estimated temperature computing means is operable in one of a plurality of operational modes, which include an estimated temperature computation performing mode for performing the computing of the estimated temperature of the motor and an estimated temperature computation non-performing mode for stopping the computing of the estimated temperature of the motor; and
the estimated temperature computing means changes an operational mode thereof from the estimated temperature computation performing mode to the estimated temperature computation non-performing mode according to a predetermined condition in a stopped state of the motor.