The effects of motor parameters on the performance of brushless DC drives

A simulation model for the transient performance prediction of brushless dc drives is described which does not require assumptions of the phase balance of either the power electronic converter or the motor; nor are idealized waveforms for induced voltage or phase and mutual inductance terms necessary. The model is applied to drives for which neither equivalent circuit nor d-q axis analyses are rigorously applicable. Test results establish the degree of correlation of the predictions to a practical example. The model is then used to conduct a sensitivity study which not only explores the degrees of model complexity necessary for adequate representation but also provides guidelines to system designers on the effects of certain practical configurations.