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17 December 1998 Analysis, design, and control of a novel optically commutated adjustable-speed motor
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This paper describes the analysis, design and control of a novel, single-phase motor with a unique behavior resulting from the use of rotating power electronics mounted to the motor armature. Coils on the armature are selectively shorted by power MOSFET's which rotate with the armature, and torque is produced by interaction between currents induced in the shorted coils and the magnetic field produced by a stationary field coil. Control is limited to the timing of which armature coils are to be shorted as a function of armature speed and angle, it is possible to modulate torque production and obtain torque or speed control using only single-phase ac power and without the use of brushes or permanent magnets. An electro-mechanical model for this type of motor is presented and validated with respect to experimentation. The results show promise for achieving low- cost, adjustable-speed drives using this novel method of rotating electronics, optical communications, and computed commutation.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wyatt S. Newman, Ivan Risch, Yuandao Zhang, Steven Garverick, and Michael Inerfield "Analysis, design, and control of a novel optically commutated adjustable-speed motor", Proc. SPIE 3518, Sensors and Controls for Intelligent Machining, Agile Manufacturing, and Mechatronics, (17 December 1998);

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