Title :
Controlling the speed of an induction motor by resonating the rotor circuit
Author_Institution :
Dept. of Electr. & Electron. Eng., Pretoria Univ.
Abstract :
The possibility of obtaining various torque-speed characteristics from a wound-rotor induction motor by operating such a motor close to its rotor resonance is described. It is shown that, by the use of reactive rotor networks, high starting and braking torques may he obtained. An induction motor operating with this proposed technique of speed control also reacts favorably to nonsinusoidal supply voltages and has an improved power factor. No auxiliary machines or power supplies are required and any slip ring induction motor of conventional design can be used
Keywords :
braking; control system analysis; control system synthesis; induction motors; machine control; machine testing; machine theory; resonance; rotors; starting; velocity control; braking; control design; experiments; induction motor; nonsinusoidal supply voltages; power factor; reactive rotor networks; rotor circuit resonance; simulation; slip ring; speed control; starting; torque-speed characteristics; wound-rotor; Capacitance; Inductance; Induction motors; Power harmonic filters; Power supplies; RLC circuits; Rotors; Synchronous motors; Torque; Velocity control;
Journal_Title :
Industry Applications, IEEE Transactions on
