Electric vehicle controller

Details Electric vehicle controller Electric vehicle controller

2011-07-19

2011-07-19

Benson, Walter (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Plural, diverse conditions or with time-delay means

C318S452000, C318S453000, C318S445000

Reexamination Certificate

active

07982421

ABSTRACT:
An electric vehicle controller includes a speed sensorless vector controller for estimating the rotating speed of an AC motor from an output voltage command and an output current from a VVVF inverter, and controlling the VVVF inverter based on the estimate. An overhead wire current detector detects the current flowing through an overhead wire. A wrong action sensor senses an abnormality in the speed sensorless vector controller from the sign of the current flowing through the overhead wire and detected by the overhead wire current detector when the VVVF inverter is in operation. A gate stop circuit stops the VVVF inverter when the wrong action sensor senses an abnormality.

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Office Action (Notification of Reason(s) for Refusal) dated Nov. 17, 2010, issued in the corresponding Korean Patent Application No. 10-2009-7007832, and an English Translation thereof.
*Form PCT/ISA/210 (International Search Report) dated Jan. 8, 2008. *Copy attached.

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