ELECTRIC VEHICLE AND CONTROL METHOD OF ELECTRIC VEHICLE
First Claim
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1. An electric vehicle comprisinga synchronous motor;
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wherein the electric vehicle is driven by the synchronous motor and the induction motor, and braked with a first regenerative torque generated by the synchronous motor and a second regenerative torque generated by the induction motor;
the electric vehicle further comprises a battery which supplies a drive electric power to the synchronous motor and the induction motor, and receives a regenerative electric power from the synchronous motor and the induction motor; and
a ratio of the first regenerative torque to the second regenerative torque is changed in accordance with a state of charge of the battery.
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Abstract
An electric vehicle driven by a synchronous motor 21 and an induction motor 31, and braked with a first regenerative torque BT1 generated by the synchronous motor generator 21 and a second regenerative torque BT2 generated by the induction motor generator 31. The ratio of the first regenerative torque BT1 to the second regenerative torque BT2 is changed in accordance with a state of charge (SOC) of a battery 11. In this way, a switching frequency from a regenerative brake to a hydraulic brake is restricted to improve drivability when a state of charge (SOC) of the battery 11 is high.
17 Citations
7 Claims
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1. An electric vehicle comprising
a synchronous motor; - and
an induction motor; wherein the electric vehicle is driven by the synchronous motor and the induction motor, and braked with a first regenerative torque generated by the synchronous motor and a second regenerative torque generated by the induction motor; the electric vehicle further comprises a battery which supplies a drive electric power to the synchronous motor and the induction motor, and receives a regenerative electric power from the synchronous motor and the induction motor; and a ratio of the first regenerative torque to the second regenerative torque is changed in accordance with a state of charge of the battery. - View Dependent Claims (2, 3, 4, 5)
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6. An electric vehicle comprising
a synchronous motor; - and
an induction motor; wherein the electric vehicle is driven by the synchronous motor and the induction motor, and braked with a first regenerative torque generated by the synchronous motor and a second regenerative torque generated by the induction motor; the electric vehicle further comprises a battery which supplies a drive electric power to the synchronous motor and the induction motor, and receives a regenerative electric power from the synchronous motor and the induction motor; and a controller including a CPU, and the CPU of the controller executes a torque ratio setting program which changes a ratio of the first regenerative torque to the second regenerative torque in accordance with a state of charge of the battery.
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7. A controlling method of an electric vehicle comprising
a synchronous motor; -
an induction motor; and a battery which supplies a drive electric power to the synchronous motor and the induction motor, and receives a regenerative electric power from the synchronous motor and the induction motor, wherein the electric vehicle is driven by the synchronous motor and the induction motor, and braked with a first regenerative torque generated by the synchronous motor and a second regenerative torque generated by the induction motor; and the ratio of the first regenerative torque to the second regenerative torque is changed in accordance with a state of charge of the battery.
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Specification