Electric power steering apparatus

Details Electric power steering apparatus Electric power steering apparatus

2006-08-15

2006-08-15

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C318S432000, C180S412000, C701S022000, C701S036000, C701S041000, C701S042000

Reexamination Certificate

active

07091686

ABSTRACT:
The atmosphere temperature calculator calculates an estimated atmosphere temperature value by subtracting a temperature rise amount of a temperature sensor which is calculated based on a motor drive detected current value from a detected temperature value of the temperature sensor. The overheating prevention calculator calculates estimated temperature values of a plurality of protection objects to be protected from overheating based on the estimated atmosphere temperature value and the motor drive detected current value and determines an upper limit of target current of driving a motor based on such estimated temperature values. The temperature compensation calculator calculates a temperature compensation current value to be added to a target current value in order to compensate a temperature characteristic of a predetermined portion based on the estimated atmosphere temperature value.

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patent: 6945351 (2005-09-01), Fujita
patent: 2005/0242760 (2005-11-01), Fujita et al.
patent: 2586020 (1998-09-01), None
patent: 2003-284375 (2003-10-01), None

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