Electricity: motive power systems – Battery-fed motor systems
Patent
1995-11-07
1997-08-26
Wysocki, Jonathan
Electricity: motive power systems
Battery-fed motor systems
318800, 318434, H02P 300
Patent
active
056613806
ABSTRACT:
The present invention provides a protection apparatus in a control system for an electric vehicle which is capable of performing back-up driving by using a back-up control method, without using output from sensors even if the sensor in the control system for ordinary driving is failed. When at least one of the current sensor, the speed sensor and the accelerator sensor is detected to be abnormal, a back-up control voltage v1 is output as an abnormal signal from a running back-up control circuit. As a result, the running back-up control circuit sets the limiter of the output of the current control circuit to zero and switches the control signal to the inverter from vector control to V/f voltage control.
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Matsudaira Nobunori
Obara Sanshiro
Yamada Hiroyuki
Yoshihara Shigeyuki
Hitachi , Ltd.
Hitachi Car Engineering Co. Ltd.
Wysocki Jonathan
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