| Abstract |
Analytic time functions, describing inverter output currents that result from periodic pulse patterns, are presented in this paper. With the use of these functions, the impact of such pulse patterns on current-waveforms and developed torque can be evaluated with good accuracy, without the need of time consuming simulations. A distinction between fundamental frequency related effects and auxiliary effects caused by the non-fundamental frequency components of the applied voltage is made. Traditional machine theory can deal with the fundamental effects, while the presented "fish method" manages the auxiliary effects too. Superposition of both outcomes yield the final inverter/machine performance for any periodic voltage pulse pattern, even under dynamic load conditions. Measurements illustrate the practical usefulness of the "fish method". |
