NDLI: Smooth speed control of three-phase induction motor by integral-cycle switching

Content Provider	IEEE Xplore Digital Library
Author	Asghar, M.S.J. Shees, M.M.
Copyright Year	1996
Description	Author affiliation: Dept. of Electr. Eng., Aligarh Muslim Univ., India (Asghar, M.S.J.; Shees, M.M.)
Abstract	The speed of three-phase induction motors can be controlled in steps by controlling the applied voltage using an integral-cycle switching method. However, the OFF period causes large pulsations in generated torque. Moreover the induced EMF in the windings and decelerating rotor during the OFF period, cause large reswitching currents as well as large transient-negative torques. They cause abnormal performance of the motor and even proportional speed variation in steps becomes difficult. A combination of integral-cycle control and switching-instant control on the applied voltage wave (in the first half-cycle during ON period) is employed for the fine voltage variation of one-phase of the stator input. This reduces peak re-switching current as well as transient-negative torque and therefore smooth and proportional speed variation is obtained.
Starting Page	48
Ending Page	52
File Size	440951
Page Count	5
File Format	PDF
ISBN	0780327950
DOI	10.1109/PEDES.1996.537281
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-01-08
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Velocity control Induction motors Voltage control Stators Torque Rotors Electric variables control Costs Wounds Heating
Content Type	Text
Resource Type	Article

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