Electric car controller

Details Electric car controller Electric car controller

2005-01-25

2010-10-12

Black, Thomas G (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Railway vehicle

C318S376000

Reexamination Certificate

active

07813847

ABSTRACT:
A power failure section can be accurately detected without depending on a loaded state and application of voltage to the overhead power line can be stopped in a short time when a power failure is detected. An electric car controller includes an overhead power line voltage detector, a band-pass filter for detecting a ripple component included in the detected overhead power line voltage, a comparator for comparing the level of the detected ripple component with a predetermined reference value Vref1, a rheotome control circuit which judges that a power failure has occurred if the ripple component is judged to be smaller than the reference value Vref1and disconnects the overhead power line from an inverter, a second comparator for comparing the level of the ripple component with a reference value Vref2larger than the reference value Vref1, and a control circuit which operates if the ripple component is judged to be smaller than the reference value Vref2to suppress the increase of the overhead power line voltage.

REFERENCES:
patent: 4123693 (1978-10-01), Anderson et al.
patent: 5283507 (1994-02-01), Stitt et al.
patent: 2002-095299 (2002-03-01), None
International Search Report for PCT/JP2005/000915 dated Apr. 26, 2005.

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