Electric vehicle and diagnosis method for electric vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorShohei Oi
Life of this patent
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Abstract
An electric vehicle includes a traction motor, an inverter that supplies the motor with an alternating current, three current sensors that respectively measure current of each phase of the alternating current output by the inverter, the alternating current being a three phase alternating current; and a controller that controls the motor through the inverter. The controller is configured to, when one of the current sensors becomes unusable, identify the unusable current sensor while controlling the motor with a d-axis voltage command value set to zero and a q-axis voltage command value set to a non-zero value.
Claims10
An electric vehicle comprising:
- a traction motor;
- an inverter that supplies the motor with an alternating current;
- three current sensors that respectively measure current of each phase of the alternating current output by the inverter, the alternating current being a three phase alternating current;
- and
- a controller that controls the motor through the inverter, the controller being configured to, when one of the current sensors becomes unusable, identify the unusable current sensor while controlling the motor with a d-axis voltage command value set to zero and a q-axis voltage command value set to a non-zero value.
A diagnosis method for an electric vehicle including a traction motor, an inverter that supplies the motor with an alternating current, three current sensors that respectively measure current of each phase of the alternating current output by the inverter, the alternating current being a three phase alternating current, and a controller that controls the motor through the inverter, the diagnosis method comprising, when one of the current sensors becomes unusable, identifying the unusable current sensor while controlling the motor with a d-axis voltage command value set to zero and a q-axis voltage command value set to a non-zero value.
Dependencies are inferred from the claim text.