Current cutoff circuit and electric steering wheel lock
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United States of America Patent
Stats
-
Apr 29, 2008
Grant Date -
Jun 23, 2005
app pub date -
Dec 16, 2004
filing date -
Dec 19, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An electric cutoff circuit for preventing overheating of a load. The current shutoff circuit includes an FET connected to a motor circuit. A relay fault detection circuit is connected to the motor circuit to detect potential at the motor circuit. A CPU sends a control signal to a relay. The CPU determines whether a fault has occurred in the relay based on the control signal sent to the relay and the detection of the relay fault detection circuit. When determining that a fault has occurred in the relay, the CPU opens the FET to configure an open circuit with the motor circuit.
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Family
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Cited Art Landscape
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