Control method and control system of motor rotation speed
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsDong Hun Lee, Sung Do Kim, Chang Seok You, Min Su Kang, Soon Il Jeon
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Abstract
A control method of a motor rotation speed may include calculating a q-axis potential difference of a synchronous coordinate system for controlling a q-axis current of the synchronous coordinate system based on a target rotation speed of a motor and a measured rotation speed value of the speed sensor, calculating a voltage command of the synchronous coordinate system based on the calculated q-axis potential difference of the synchronous coordinate system, and controlling an inverter connected to the motor according to the calculated voltage command of the synchronous coordinate system.
Claims15
A control method of a motor rotation speed, comprising:
- calculating, by a motor controller, a q-axis potential difference of a synchronous coordinate system for controlling a q-axis current of the synchronous coordinate system based on a target rotation speed of a motor and a measured rotation speed value of the motor;
- calculating, by the motor controller, a voltage command of the synchronous coordinate system based on the calculated q-axis potential difference of the synchronous coordinate system;
- and
- controlling, by the motor controller, an inverter connected to the motor according to the calculated voltage command of the synchronous coordinate system,
- wherein calculating the voltage command of the synchronous coordinate system includes calculating a q-axis voltage command of the synchronous coordinate system by feedforward compensating for a counter electromotive force of the motor to the calculated q-axis potential difference of the synchronous coordinate system.
A control system of a motor rotation speed, comprising:
- a speed sensor for measuring the motor rotation speed;
- and
- a motor controller configured to calculate a q-axis potential difference of a synchronous coordinate system for controlling a q-axis current of the synchronous coordinate system based on a target rotation speed of a motor and a measured rotation speed value of the speed sensor, calculate a voltage command of the synchronous coordinate system based on the calculated q-axis potential difference of the synchronous coordinate system, and control an inverter connected to the motor according to the calculated voltage command of the synchronous coordinate system,
- wherein the motor controller feedforward compensates for a counter electromotive force of the motor to the calculated q-axis potential difference of the synchronous coordinate system to calculate a q-axis voltage command of the synchronous coordinate system.
Dependencies are inferred from the claim text.