Electricity: motive power systems – Battery-fed motor systems
Patent
1996-08-01
1998-04-14
Ip, Paul
Electricity: motive power systems
Battery-fed motor systems
318434, 318439, 318811, 318490, H02P 763, B60L 300
Patent
active
057396493
ABSTRACT:
A device and method for detecting a failure which are used with an AC motor control circuit to detect a failure in a total of three current sensors correlated to phases U, V, W of a motor. Three types of current paths are formed in order to position two current sensors on each current path while providing an adequate time interval so as not to rotate the motor. By comparing output from each current sensor with a reference value, or by comparing respective output from the two current sensors provided on the same current path, a failure in the respective current sensors is detected. The motor need not be driven in order to detect a fail in the current sensors.
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Ip Paul
Toyota Jidosha & Kabushiki Kaisha
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