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US 6,274,998 B1Granted
Controller for electric vehicles
AssigneeHiatchi, Ltd.
InventorsTakashi Kaneko, Takeshi Ando, Akira Horie, Ken Itou
Life of this patent
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AssigneeHiatchi, Ltd.
InventorsTakashi Kaneko, Takeshi Ando, Akira Horie, Ken Itou
Estimating the term…
A controller for electric vehicles comprising a vector control inverter for controlling motors, which drive wheels of the electric vehicles, by dividing the primary current of the motors into an exciting current component and a torque current component, and controlling respective of the current components based on a respectively designated command, characterized in further comprising a dectector for detecting a wheel velocity (including a rotor frequency of the motor proportional to the wheel velocity), a detector for detecting slipping and skidding of the wheel based on a differential value (a changing rate with time) of the detected wheel velocity, a dectector for detecting re-adhesion of the wheel based on the differential value and a twice differential value of the detected wheel velocity, and an adjuster for adjusting the designated command for the torque current component in response to the detectors.
A controller for electric vehicles comprising a vector control inverter for controlling motors, which drive wheels of the electric vehicles, by dividing the primary current of the motors into an exciting current component and a torque current component, and controlling respective of the current components based on a respectively designated command, further comprises;
A controller for electric vehicles comprising a vector control inverter for controlling motors, which drive wheels of the electric vehicles, by dividing the primary current of the motors into an exciting current component and a torque current component, and controlling respective of the current components based on a respectively designated command, further comprises;
A controller for electric vehicles comprising a vector control inverter for controlling motors, which drive wheels of the electric vehicles, by dividing the primary current of the motors into an exciting current component and a torque current component, and controlling respective of the current components based on a respectively designated command, further comprises;
A re-adhesion controller for electric vehicles comprising a vector control inverter for controlling induction motors, which drive wheels of the electric vehicles, further comprises;
Dependencies are inferred from the claim text.