Power source for a hybrid vehicle

Details Power source for a hybrid vehicle Power source for a hybrid vehicle

2007-08-07

2007-08-07

Duda, Rina (Department: 2837)

Electricity: motive power systems

Battery-fed motor systems

C318S500000, C318S432000, C320S104000, C320S118000

Reexamination Certificate

active

11403879

ABSTRACT:
A power source for a hybrid vehicle is provided which can protect its electric motor driving circuit from being damaged by a back electromotive force generated in a motor. The back electromotive force generated in an electric motor is detected by a high voltage detector circuit and converted by a step-down circuit into a low voltage which is then stored in a low-voltage second battery. Accordingly, as the back electromotive force does not become excessively high, it will be prevented from damaging a switching circuit. Also, the back electromotive force generated in the motor is charged in the low-voltage battery and can thus be supplied to a control circuit or any other component, contributing to the reduction of the fuel consumption of the hybrid vehicle. The back electromotive force can alternatively be diverted for charging a medium-voltage third battery.

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patent: 5508594 (1996-04-01), Underwood et al.
patent: 6870336 (2005-03-01), Murakami et al.
patent: 6909201 (2005-06-01), Murty et al.
patent: 6979977 (2005-12-01), Amano et al.
patent: 2004/0232881 (2004-11-01), Amano et al.
patent: 2005/0151517 (2005-07-01), Cook et al.
patent: 2006/0097577 (2006-05-01), Kato et al.
patent: 2002-321631 (2002-11-01), None

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