Apparatus for detecting over current of motor in vehicle

Details Apparatus for detecting over current of motor in vehicle Apparatus for detecting over current of motor in vehicle

2007-03-20

2007-03-20

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C361S031000, C361S093900, C388S903000

Reexamination Certificate

active

11202651

ABSTRACT:
An apparatus for over current detection of a motor for use in a vehicle. This invention prevents the motor from burning out by more precisely detecting an over current of the motor within an overall drive area of the motor. This can be accomplished by setting, as an over current detection reference current, a predefined range between a normal current and a constraint current of the motor by drive input conditions of the motor, detecting a current of the motor flowing in a field effect transistor (FET) via a shunt resistor and a differential amplifier, and comparing the detected current with the over current detection reference current.

REFERENCES:
patent: 4532567 (1985-07-01), Kade
patent: 5483141 (1996-01-01), Uesugi
patent: 5530788 (1996-06-01), Saijima
patent: 6717785 (2004-04-01), Fukuda et al.
patent: 7079368 (2006-07-01), Ishikawa et al.
patent: 7113376 (2006-09-01), Nomura et al.

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