McDermott, Will & Emery
Electrical vehicle control device having fail-safe
 A control device for controlling a motor of an electrical vehicle is provided with a motor control circuit 7 having a first calculation control circuit 11 and a second calculation control circuit 12. In operation, the motor control circuit 7 allows the first and second calculation control circuits 11, 12 to respectively calculate motor control commands It*, Im* and Its*, Ims* on the basis of inputted identical driving condition. The circuit 7 compares the motor control commands It*, Im* calculated by the first calculation control circuit 11 with the motor control commands Its*, Ims* by the second calculation control circuit 12, respectively. When a difference between the calculated commands It* and Its* and another difference between the calculated commands Im* and Ims* are equal to or more than a predetermined value, then the motor control circuit 7 outputs a stop command to stop an operation of the motor. 
Hitachi Car Engineering Co., Ltd. Hitachi, Ltd. Nissan Motor Co., Ltd.
B Y B B Y B B Y B B
B60L Y02T B60L B60L Y02T B60L B60L Y02T B60L B60L
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Hiroyuki Yasuo Eiichi
Yamada Matsunaga Ohtsu