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US 10,763,771 B2Granted
Method and system for controlling motor for vehicle
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsHeon Young Kwak, Chae Duck Chon, Ho Joon Shin
Life of this patent
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Abstract
A method and a system for controlling a motor for a vehicle are provided. The vehicle is capable of being continuously driven by controlling the motor based on position information of a rotor derived using a sensorless estimation algorithm in the event of a failure of a position sensor of a motor rotor while the vehicle is being driven.
Claims4
A method for controlling a motor for a vehicle, comprising:
- determining, by a controller, whether a failure of a position sensor occurs by receiving first position information of a motor rotor which is output from a position sensor of the motor rotor;
- deriving, by the controller, second position information using a sensorless estimation algorithm in response to determining that the failure of the position sensor occurs and switching the first position information into the second position information, wherein the sensorless estimation algorithm is previously provided and stored;
- and
- detecting, by the controller, a value of a direct current which is input to an inverter in the condition in which output torque of the motor is limited and compensating for error of the second position information based on the sensed value of the direct current,
- wherein in the switching of the first position information into the second position information, the second position information is derived by applying third position information of the motor rotor and motor speed which are each output before the failure of the position sensor occurs to the sensorless estimation algorithm, and
- wherein the sensorless estimation algorithm derives the second position information using the third position information as an initial value and integrating the motor speed.
3 more elements
A system for controlling a motor for a vehicle, comprising:
- a motor configured to generate driving force of the vehicle;
- a position sensor of a motor rotor configured to output position information of the motor rotor;
- an inverter configured to convert a direct current into an alternating current and output the alternating current to the motor;
- and
- a controller configured to:
- determine whether a failure of the position sensor occurs by receiving first position information of the motor rotor which is output from the position sensor of the motor rotor;
- derive second position information using a sensorless estimation algorithm in response to determining that the failure of the position sensor occurs, wherein the sensorless estimation algorithm is previously provided and stored;
- switch the first position information into the second position information;
- sense a value of the direct current which is input to the inverter in the condition in which output torque of the motor is limited;
- and
- compensate for error of the second position information based on the sensed value of the direct current,
- wherein the controller is configured to derive the second position information by applying third position information of the motor rotor and motor speed which are each output before the failure of the position sensor occurs to the sensorless estimation algorithm, and
- wherein the sensorless estimation algorithm derives the second position information using the third position information as an initial value and integrating the motor speed.
10 more elements
Dependencies are inferred from the claim text.