STARTUP TORQUE IMPROVEMENT OF （启动转矩的改进）.pdfVIP

START-UP TORQUE IMPROVEMENT OF PERMANENTMAGNET SYNCHRONOUS MOTORS * A. Consoli - P. Pillay - A. Raciti * Istituto di Elettrotecnica ed Elettronica Universita’ di Catania Viale A. Doria, 6 - 95125 Catania - Italy Department of Electrical Engineering University of New Orleans Lakefront, LA 70148,USA Abstract - The present paper analyses the transient of synchronous motor and proposes a method to improve its a PM synchronousmotor and proposes a method to improve starting performance. its starting performances. Three banks of capacitors are connected in series between the three-phase source Three banks of capacitors are connected in series and the motor. A stability analysis is performed to between the three-phase source and the motor as shown demonstrate that a range of capacitance exists that is in Fig.l. The effect of the capacitors on the motor useful to improve the motor dynamics. Motor line dynamics is essentially due to a voltage increase on starting is then analyzed using the calculated value of the motor terminals and to a consequent variation of capacitance and several simulation and experimental the electromagnetic torques produced at the air-gap. runs are performed. It is demonstrated that a range of capacitance exists