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Steady-state time-periodic finite element analysis of a brushless DC motor drive considering motion

Jagieła M., Gwóźdź J.

Archives of Electrical Engineering

2015

Vol. 64, nr 3

471--486

This paper aims at providing a framework for comprehensive steady-state time-domain analysis of rotating machines considering motion. The steady-state waveforms of electromagnetic and circuit quantities are computed via iterative solution of the nonlinear field-circuit-and-motion problem with constraints of time periodicity. The cases with forced speed and forced load torque are considered. A comparison of execution times with a conventional time-stepping transient model is carried out for two different machines. The numerical stability of a time-periodic model with forced speed is shown to be worse than that of traditional transient time-stepping one, although the model converges within a reasonable number of iterations. This is not the case if forced load via equation of mechanical balance is accounted for. To ensure convergence of the iterative process the physical equation of motion is replaced by the fixed-point equation. In this way the model delivers time-periodic solutions regarding not only the electromagnetic quantities but also the rotational speed.

Substantiation of the starter-generator type for moving objects with self-contained power supply systems

Volokitina Y., Vlasov A.

Prace Instytutu Elektrotechniki

2013

Z. 263

105--113

In this article a comparative analysis of two types of brushless switched electric machines, induction and permanent-magnet machines is presented. These machines are selected as the most allowable for starter-generator operation of independent mobile objects. It is shown that permanent-magnet machines are more perspective for using in the capacity of starter-generator.

W artykule omówiono i przeanalizowano dwa rodzaje maszyn elektrycznych: indukcyjną i bezszczotkową prądu stałego o magnesach trwałych. Zostały one wybrane jako najlepiej nadające się do pracy prądnicowo-silnikowej. Wykazano, że bezszczotkowe maszyny prądu stałego o magnesach trwałych są rozwiązaniem lepszym pod względem właściwości i niezawodności.