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Wykorzystanie metody analitycznego procesu hierarchicznego w projektowaniu silnika BLDC

100%

Gwóźdź J.

2016

tom z. 74

35--42

W artykule zaproponowano zastosowanie procesu decyzyjnego (metoda analitycznego procesu hierarchicznego) w projektowaniu silnika bezszczotkowego prądu stałego (BLDC). Proces decyzyjny wykorzystany jest w celu dokonania wyboru najlepszego z punktu widzenia pięciu różnych kryteriów oceny projektu silnika. Do wygenerowania poszczególnych projektów zastosowano obliczenia w ustalonym stanie pracy silnika metodą elementów skończonych.

Design of a small BLDC motor via field model considering the 120o inverter drive

100%

Gwóźdź J.

2016

tom z. 74

27--34

The work aims to present a design procedure for brushless-DC motors (BLDC) driven from 120o inverter based on a new steady-state finite element model. The parametric computer system is developed for this purpose. The system provides connection between the programs written in Matlab that allow for determination of the steady-state performance of the motor with the finite element mesh generator GMSH. The machine geometry is described via scripting language allowing for arbitrary changes of dimensions for all element of the magnetic circuit. The computational example regarding extension of the constant-torque operation range for a fractional-power motor is presented.

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

63%

Jagieła M. , Gwóźdź J.

Archives of Electrical Engineering

2015

tom 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.