Electricity: motive power systems – Battery-fed motor systems
Reexamination Certificate
2006-08-22
2006-08-22
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Battery-fed motor systems
Reexamination Certificate
active
07095191
ABSTRACT:
A control apparatus of an electric vehicle in which relays are switched to a disconnecting state without causing failure of the electric vehicle. Main relays Ry1,Ry2switchable between a connecting state and a disconnecting state are provided between a drive motor11for driving driven wheels and a motor drive battery34for supplying current to the drive motor11.When these main relays Ry1,Ry2are to be switched to the disconnecting state, it is determined whether or not the output current I from the motor drive battery34is below a predetermined current and whether or not the vehicle speed V is below a predetermined speed. When it is determined that the output current I is below the predetermined current and the vehicle speed V is below the predetermined speed, the main relays Ry1,Ry2are switched to their disconnecting states. By this means it is possible to prevent welding failure of the main relays Ry1,Ry2and to protect an invertor36and high-voltage auxiliaries58from an induced voltage of the drive motor11.
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Donovan Lincoln
Fuji Jukogyo Kabushiki Kaisha
Horn Robert W.
Smith , Gambrell & Russell, LLP
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