Comparison of sinusoidal excitation and trapezoidal excitation of a brushless permanent magnet motor

TitleComparison of sinusoidal excitation and trapezoidal excitation of a brushless permanent magnet motor
Publication TypeConference Paper
Year of Publication1990
AuthorsLiu, G., and W. G. Dunford
Conference NamePower Electronics and Variable-Speed Drives, 1991., 4th International Conference on
Pagination446 -450
Date Publishedjul.
Keywords3-phase surface magnet motor, brushless permanent magnet motor, computerised control, DC motors, efficiency, exciters, inverter, invertors, machine control, microcomputer applications, MOSFETs, Motorola 68HC11 microcontroller, permanent magnet motors, sinusoidal excitation, trapezoidal excitation
Abstract

The authors compare the performance of a sinusoidal-type, three-phase, twelve-pole, surface magnet motor using sinusoidal excitation and the performance of the same motor using trapezoidal excitation. The comparison is focused on the overall efficiency of the drive for each method. For sinusoidal excitation, the inverter is modulated by a PWM control signal generated by a Motorola 68HC11 microcontroller. A look-up table is used in the generation of the PWM signal. For trapezoidal excitation, the bottom three MOSFETs of the inverter are modulated by a PWM signal generated by hardware

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