Electricity: motive power systems – Battery-fed motor systems
Reexamination Certificate
2008-07-29
2008-07-29
Patel, Rajnikant B (Department: 2838)
Electricity: motive power systems
Battery-fed motor systems
C320S140000, C363S074000, C363S080000
Reexamination Certificate
active
07405526
ABSTRACT:
The SOC of a battery is calculated based on the voltage Vb and current Ib of a battery, and a battery electromotive voltage Vbo is calculated based on the SOC of the battery. Based on the battery electromotive voltage Vbo and the voltage Vc of a capacitor connected on the output side of the DC/DC converter, a duty ratio D(=Vbo/2Vc) achieving the maximum battery power is set as the lower limit value DL of the optimum duty range DR, so that the lower limit value DL is varied according to the SOC of the battery. The duty ratio D is limited so as to fall within the optimum duty range DR, and the DC/DC converter is controlled to be driven using the limited duty ratio D.
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Kenyon & Kenyon LLP
Patel Rajnikant B
Toyota Jidosha & Kabushiki Kaisha
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