주입 전압파형의 형상에 따른 고조파 주입 센서리스 기법의 제어 성능 비교
Comparison of Control Performance according to the Injection Voltage Waveform of the Harmonic Voltage Injection Sensorless Technique
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초록
본 논문은 전동기의 저속 영역 운전의 센서리스 기법으로 적합한 고조파 주입 센서리스 제어기법에서 사인파, 삼각파 및 사각파를주입하여 인가 전압 파형에 따른 센서리스 성능을 비교한다. 본 연구는 영구자석 전동기의 센서리스 기법에 관한 것이다. 1kHz 주파수를 갖는 여러 모양의 파형을 주입하여, 각 파형에 대한 추정된 각도의 오차량을 비교 분석한다. 실험은 HILS(hardware in theloop simulation) 시스템을 이용하였으며, Hardware는 제어보드이며 실시간 시뮬레이터에는 Simulik로 구현된 인버터와 전동기의 모델이 위치한다. 제어 알고리즘은 FPGA 제어보드로 구현하였으며, 이는 10kHz 주파수의 PWM 인터럽트 서비스 루틴, 고조파주입 및 위치 검출 센서리스 알고리즘 등을 포함한다. HILS 실험을 통해 사인파, 삼각파 및 사각파 고조파 주입시 센서리스 제어성능을 비교한다.
Abstract
This paper compares the sensorless control performance according to the applied voltage waveform by injectingsinusoidal, triangular, and square waveform in the harmonic injection sensorless control method. By injectingvarious voltage shape waveform with a frequency of 1kHz, the error amount of the estimated angle for eachwaveform is compared and analyzed. For the experiment, the HILS(hardware in the loop simulation) system wasused. The hardware is the control board, and the inverter and motor models implemented in Simulik are locatedin the real-time simulator. The control algorithm is implemented by the FPGA control board, which includes aPWM interrupt service routine with a frequency of 10 kHz, harmonic injection and position detection sensorlessalgorithm.
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