Affiliations: Department of Electrical Engineering, National Chin-Yi University of Technology, Taiping District, Taichung City, Taiwan
Correspondence:
[*]
Corresponding author. Yung-Chang Luo, Department of Electrical Engineering, National Chin-Yi University of Technology, No.57, Sec. 2, Zhongshan Rd., Taiping Dist., Taichung City, Taiwan. E-mail: luoyc@ncut.edu.tw.
Abstract: In this study an adaptive on-line speed estimation approach has been proposed for a sensor-less indirect air-gap field orientation controlled (AGFOC) induction motor (IM) drive. The indirect AGFOC IM drive was established by utilizing the stator current and air-gap flux. The estimated synchronous speed was derived from the developed reactive power based adaptive air-gap flux estimator, and the estimation of rotor speed was made by subtracting the slip speed from the estimated synchronous speed. Speed estimation and control by the AGFOC IM drive could be extended to include constant power operation mode by utilizing the field weakening technique. The MATLAB® ∖Simulink ® toolbox was used to simulate this system and all the control algorithms were realized using a TI DSP 6713-and-F2812 card to generate pulse width modulation (PWM) signals to the power stage, actuate an IM to validate this approach (sensor-less AGFOC). Both simulation and experimental responses confirmed the effectiveness of the proposed system.
Keywords: Speed estimation, air-gap field orientation controlled (AGFOC), adaptive air-gap flux estimator, field weakening technique
