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This paper considers examination of a brush life as the commutation phenomenon over the commutator width and brush width ratio of a universal motor. It can imagine that how a commutator width and brush width ratio has big influence on operation efficiency and a brush life. However, the authors are not yet looking at the report which the optimal value of the commutator width and brush width ratio considered...
This paper explores the simulation technique of the harmonic current under phase angle control of a universal motor. The harmonic current generates the damage-by-fire accident of the transformer and phase advance capacitor, both of which are connected to an electric power system. This problem has warranted new standards imposed by the IEC. Comparatively, the universal motor for vacuum cleaners is...
This paper focuses on the restraint method of the 3rd harmonics current, in which close attention has been paid to the iron core shape of the universal motor for power vacuum cleaners. In this paper, the gap permeance, magnetic saturation of an iron core, and the influence that a slot ripple has on harmonic current were verified using FEM electromagnetism analysis. As the result, stator core shape...
The universal motors of our advanced research use FEM simulations to perform modeling of universal motors rotating at ultrahigh speed by using the like state function method with respect to the details regarding the commutation scintillation phenomenon of the commutators, the air gap surface, and the contact condition of the brushes. As a result, at the design stage, the commutation scintillation...
The home appliance vacuum cleaner is one of uses of super high-speed blower motor. Universal motor is mainly used for vacuum cleaner motors, now. But, there is a limit of commutational condition in the speed of a commutator type motor. For this reason, the cleaner which uses the BLDC motors used a rare earth permanent magnet type are produced in Japan. However, rare earth resources have political...
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