| Summary: | The double-revolving field model is used to determine theoretically efficiencyoptimal
operating conditions for single-phase induction motors equipped with an
auxiliary winding. The algorithm developed determines the optimal values of main
winding current, auxiliary winding current and stator frequency for any desired
combination of torque and rotor speed within the motor's ratings. Computer
simulations are presented to validate theoretical results and relate optimal terminal
voltages to computed winding currents. Experimental measurements made on a
2 pole, 1 hp, 230V submersible motor are compared with computer simulations.
These measurements reveal that while it is most important to control core losses
by matching the V/Hz ratio to the load, it is possible to make further efficiency
improvements by exciting the auxiliary winding. === Applied Science, Faculty of === Electrical and Computer Engineering, Department of === Graduate
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