DESIGN OF PROTOTYPE DYNAMIC AC POWER MACHINE WITH EQUIVALENT CIRCUIT MODELING (TORQUE SPEED CURVE OF INDUCTION MOTOR 1,1, KW)
Squirrel cage induction motors are widely used in electric motor drives due to their satisfactory mechanical characteristics (torque, current, overloading) and small dimensions, as well as their low price. When starting an induction motor, a large current is required for magnetizing its core, which results in a low power factor, rotor power losses and a temperature rise in the windings. None of these parameters should reach values beyond certain limits until the motor reaches nominal speed. The speed of an induction motor 1,1kW is affected very little by fluctuations of voltage. The greater the supply voltage of the motor, the induction motor's speed will increase. The torque values (Tstart, TSmax and Tmax) are affected by the value of the motor supply voltage: (Vp-nl : 132.8, Tstart1 : 7.4, T S-max1 : 0.4, Tmax1 : 9.9) V, (Vp-nl : 127.0, Tstart2 : 4.8, T S-max1 : 0.3, Tmax1 : 8.4) V and (Vp-nl : 121.3, Tstart3 : 3.3, T S-max3 : 0.2, Tmax3 : 7.1) V. Stator current (IL-nl ; 2.5, 2.2, 1.9 ) Amp rises gradually on account of the increase in magnetising current (Im : 2.5, 2.2, 1.9) Amp. The magnetising current required to produce the stator flux. The component of the stator current which provides the ampere-turns balancing the rotor ampere-turns will steadily diminish as the rotor current (IL-nl) decrease with the increase in rotor speed (nr).
IEEE Standard Test Procedure for Polyphase Induction Motors and Generators. IEEE Std. 112-1978, IEEE, Inc., New York, N.Y.
IEEE St. 112-1996: IEEE Standard Test Procedure for Induction machines.
Standard IEC 60034-2-1, 2008, Standard Methods for Determining Losses and Efficiency from test. Electrical Machines.
P.G. Gummings, W.D. Bowers, W.J. Martiny, "Induction Motors Efficiency Test Methods", IEEE Trans.on Ind. Appl, Vol. IA-17, No 3, May/June 1981, pp.253-272.
J.S. Hsu, J.D Kueck, M. O, D.A. Casada, P.J. Otaduy and L.M. Tolbert, "Comparison of Induction Motors Field Efficiency Evaluation Methods", IEEE Trans. on Ind. Appl, Vol. 34, No1, Jan/February 1998, pp.117-125.
G.R. Slemon, "An Analysis of the Harmonic Impedance of Saturated Induction Machine", IEEE Trans.on Power Apparatus and Systems, Vol. PAS-99, No 4, July/Aug 1980, pp.1663-1667.
G.R. Slemon, "Modeling of Induction Machines for Electric Drives", IEEE Trans. on Ind. Applications,Vol. 25, No 6, Nov/Dec.1989, pp.1126-31.
P.L.Alger, Induction Machines, Book, 2nd edition, New York: Gordon and Breach, 1970.
Standard Handbook for Electrical Engineers, 11th Edition Mc Graww-Hill Book Company, New York, 1983, Section 20: Motors.
A. Ivanov-Smolensky,”Electrical Machines” , Vol. 2, Mir Publishers, Moscow (Translated from the Russian), 1982.
I. Boldea, S.A. Nasar, "The Induction Machines Handbook", 2002 by CRC Press LLC, Web site at www.crcpres.com, pp. 1005.
Y. EI-Ibiary, "An Accurate Low-Cost Method for Determining Electric Motors" Efficiency for the Purpose of Plant Energy Management", IEEE Trans. on Ind. Appl, Vol. 39, No 4, July/August 2003, pp.1205-1210.
M.Kostic, »Determination of Г- circuit parameters and energetic haracteristics of induction motors on the base of catalogue dates" (in Serbian), "Tehnika", separate Elektrotehnika 3/2000g, pp. 12E-18E.
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