Laboratory of Power Devices, Department of Electrical Engineering, University of Nigeria, Nsukka, Nigeria; Department of Electrical and Computer Engineering, Centre for Energy System Research, Laboratory for Electric Machines and Power Electronics, Cooker
Obe, E.S., Laboratory of Power Devices, Department of Electrical Engineering, University of Nigeria, Nsukka, Nigeria; Ojo, O., Department of Electrical and Computer Engineering, Centre for Energy System Research, Laboratory for Electric Machines and Power Electronics, Cookerille, TN 38501, United States
This paper reports the effect of values of starting and synchronisation (running) capacitors on the line-start performance of a single-phase cage-rotor synchronous reluctance motor. The d-q rotor reference frame dynamic equations were used to select the values of capacitors best suited for starting and running and it is shown that for a near-instantaneous starting, the capacitances should be varied (within the selected peaks) in line with the machine speed error. One single three-terminal capacitor device controlled by speed error signal is found to be very useful in realising a faster acceleration than obtainable with conventional and other known methods. Peak torque pulsations and current drawn by the main winding were found to be reduced, suggesting a more efficient motor drive performance. Simulated and experimental results bear a resemblance. © IEE, 2005.