Design and implementation of a sensorless induction motor drive

• Main Authors: Kun-Lin Chiang, 江坤霖
• Other Authors: Yen-Shin Lai
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/v6q88h

碩士 === 國立臺北科技大學 === 電力電子產業研發碩士專班 === 98 === The objective of this thesis is to design and implementation a sensorless induction motor drive. In order to find the rotor flux angle from stator voltages and currents by injecting high frequency signal. The difference of impedances between d axis and q axis of the measurement reference frame is introduced by analyzing the equivalent circuit of the induction machine. Using the difference of impedances caused by signal injecting to track the rotor flux angle and estimate synchronous speed. Experimental system of this thesis includes inverter, induction machine, digital signal interface CP1104 and dSPACE DS1104. The experimental results show that the high frequency injection method has stable performance, even under heavily loaded condition.