Electric vehicle
AssigneeKubota Corporation
InventorsKazuto Okazaki, Shinichi Kawabata, Hiroshi Shimada
Life of this patent
Estimating the term…
Abstract
An electric vehicle includes: an electric motor; a wheel that is driven by the electric motor; a power transmission mechanism that defines at least a part of a power transmission path between the electric motor and the wheel and that transmits rotational power of the electric motor to the wheel; a wheel brake that is provided on the wheel; an electromagnetic brake that stops rotation of the electric motor; and a controller that maintains a control value of a rotation speed of the electric motor at 0 and activates the electromagnetic brake when a vehicle speed becomes lower than or equal to a predetermined value close to 0.
Claims10
An electric vehicle comprising:
- an electric motor;
- a wheel that is driven by the electric motor;
- a power transmission mechanism that defines at least a part of a power transmission path between the electric motor and the wheel and that transmits rotational power of the electric motor to the wheel;
- a wheel brake that is provided on the wheel;
- an electromagnetic brake that stops rotation of the electric motor;
- and
- a controller that maintains a control value of a rotation speed of the electric motor at 0 and activates the electromagnetic brake when a vehicle speed becomes lower than or equal to a predetermined value close to 0, wherein
- the predetermined value is 3 to 10 km/h, and
- the controller, after setting the control value to 0 and activating the wheel brake and a regenerative brake of the electric motor, maintains the control value at 0 and activates the electromagnetic brake when the vehicle speed becomes lower than or equal to the predetermined value.
An electric vehicle comprising:
- an electric motor;
- a wheel that is driven by the electric motor;
- a power transmission mechanism that defines at least a part of a power transmission path between the electric motor and the wheel and that transmits rotational power of the electric motor to the wheel;
- a wheel brake that is provided on the wheel;
- an electromagnetic brake that stops rotation of the electric motor;
- and
- a controller that maintains a control value of a rotation speed of the electric motor at 0 and activates the electromagnetic brake when a vehicle speed becomes lower than or equal to a predetermined value close to 0, wherein
- the predetermined value is 3 to 10 km/h, and
- the controller, while maintaining the control value at 0, activates the electromagnetic brake when a temperature of the electric motor or a temperature of an electric device electrically connected to the electric motor becomes higher than or equal to a predetermined temperature.
An electric vehicle comprising:
- an electric motor;
- a wheel that is driven by the electric motor;
- a power transmission mechanism that defines at least a part of a power transmission path between the electric motor and the wheel and that transmits rotational power of the electric motor to the wheel;
- a wheel brake that is provided on the wheel;
- an electromagnetic brake that stops rotation of the electric motor;
- and
- a controller that maintains a control value of a rotation speed of the electric motor at 0 and activates the electromagnetic brake when a vehicle speed becomes lower than or equal to a predetermined value close to 0, wherein
- the predetermined value is 3 to 10 km/h, and
- if the controller sets the control value of the rotation speed of the electric motor to 0 when the electric vehicle is moving, an electric current that causes the electric motor to rotate in a direction opposite to a direction in which the electric motor is rotating is supplied to the electric motor.
Dependencies are inferred from the claim text.