Electricity: motive power systems – Battery-fed motor systems
Reexamination Certificate
2007-04-03
2007-04-03
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Battery-fed motor systems
C318S812000, C320S140000, C320S149000, C324S430000, C324S433000, C363S074000, C363S080000
Reexamination Certificate
active
10500041
ABSTRACT:
By using a target voltage Vc* of a capacitor connected to the output side of a DC/DC converter and a voltage Vb of a battery connected to the input side of the DC/DC converter, a duty ratio D as a drive instruction of the DC/DC converter is calculated. By using the voltage Vb, the electromotive force Vbo of the battery, and the charge/discharge current Ib of the battery, an internal resistance Rb is calculated. According to the internal resistance Rb and the electromotive force Vbo, the current value when the battery output becomes maximum is set as the upper limit value of the optimal current range IR, the DC/DC converter is driven/controlled by limiting the duty ratio D so that the current Ib is within the range of the optimal current range IR. Thus, it is possible to appropriately convert the battery input voltage.
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European Search Report, Appln. No. 03700550.1—2207, issued Mar. 1, 2006.
Okamura Masaki
Sato Eiji
Colon Santana Eduardo
Donovan Lincoln
Toyota Jidosha & Kabushiki Kaisha
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