Department of Electrical Engineering Southern Taiwan University Robot and Servo Drive Lab. 2016/7/6 高等電機機械老師：秦純學生：林庭輝學號： ma029102.

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Department of Electrical Engineering Southern Taiwan University Robot and Servo Drive Lab. 2016/7/6 高等電機機械老師：秦純學生：林庭輝學號： ma029102

Department of Electrical Engineering Southern Taiwan University 2016/7/6 Robot and Servo Drive Lab At standstill the rms currents in the main and auxiliary windings of a four – pole Capacitor – start induction motor are Imain = 20.7 A and Iaux 11.1A respectively. The auxiliary – winding current leads the main – winding current by. The effective turns per pole (i.e., the number of turns corrected for the effects of winding distribution) are Nmain = 42 and Naux = 68. The winding are in space quadrature. (a). determine the peak amplitudes of the forward and backward stator-emf waves. (b). Suppose it were possible to adjust the magnitude and phase of there auxiliary-winding current. What magnitude and phase would produce a purely forward emf wave ?

Department of Electrical Engineering Southern Taiwan University 2016/7/6 Robot and Servo Drive Lab. 3 從第四章的 4.6 式得知磁勢波公式為 Iaux=11.1A Naux=68 代入 4.6 式 9.7 Ans ： (a). 經由題目所給的 Imain=20.7A Nmain=42 代入 4.6 式

Department of Electrical Engineering Southern Taiwan University 2016/7/6 Robot and Servo Drive Lab. 4 (b). 當 Iaux 的電流大小及相位未改變所以在 Imain.Nmain.Naux 固定下經由繞組及電流比例公式換算過後

Department of Electrical Engineering Southern Taiwan University 2016/7/6 Robot and Servo Drive Lab The equivalent-circuit parameters of an 8-KW, 230-V, 60-Hz, four-pole, two-phase,squirrel-cage induction motor in ohm per phase are This motor is operated from an unbalance two-phase, 60-Hz, source whose phase voltages are, respectively, 223 and 190 V, the smaller voltage leading the larger by 73°. For a slip of 0.045, find (a). the phase current in each of the winding and (b). the internal machine power.

Department of Electrical Engineering Southern Taiwan University 2016/7/6 Robot and Servo Drive Lab. 6 Ans: (a)

Department of Electrical Engineering Southern Taiwan University 2016/7/6 Robot and Servo Drive Lab. 7

Department of Electrical Engineering Southern Taiwan University 2016/7/6 Robot and Servo Drive Lab. 8

Department of Electrical Engineering Southern Taiwan University 2016/7/6 Robot and Servo Drive Lab. 9

Department of Electrical Engineering Southern Taiwan University 2016/7/6 Robot and Servo Drive Lab. 10 (b)

Department of Electrical Engineering Southern Taiwan University 2016/7/6 Robot and Servo Drive Lab. 11 Thank for your listening