US 7,321,213 B2 | ||
Motor controller | ||
Shigeru Kobayashi, Toyohashi (Japan); Seiichi Watanabe, Nishikamo-gun (Japan); and Seiichi Tanaka, Toyota (Japan) | ||
Assigned to ASMO Co., Ltd., Shizuoka (Japan) | ||
Filed on Jul. 11, 2006, as Appl. No. 11/483,683. | ||
Claims priority of application No. 2005-210455 (JP), filed on Jul. 20, 2005. | ||
Prior Publication US 2007/0035896 A1, Feb. 15, 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 |
1. A motor controller comprising:
an estimated temperature calculating means that calculates an estimated temperature of a motor; and
a control unit that can perform a driving control of the motor only when the estimated temperature is not larger than a predetermined
value,
the motor controller further comprising:
a mode switching means that switches the control unit and the estimated temperature calculating means between in a normal
operation mode in which the control unit and the estimated temperature calculating means can drive the motor and in a sleep
mode in which electric power consumption of the control unit and the estimated temperature calculating means is smaller than
in the normal operation mode in accordance with a predetermined condition while the motor is stationary; and
an activating means that activates the estimated temperature calculating means in the sleep mode for a predetermined active
time every time a predetermined sleep time is elapsed.
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