Title :
Ball bearing motors
Author :
Moyssides, P.G. ; Hatzikonstantinou, P.
Author_Institution :
Dept. of Phys., Nat. Tech. Univ. of Athens, Greece
fDate :
11/1/1997 12:00:00 AM
Abstract :
We discuss and clarify a number of very serious mistakes and misunderstandings concerning the mechanism of the ball bearing motor. Specifically we show that Gruenberg´s mechanism, which is equivalent to the phenomenological model of Watson, Williams, and Crimp (1993), does not explain the ball bearing motor behavior at all, because the predicted total torque T acting on the ball is T=0. In addition, another wrong conclusion obtained by WWC is their interpretation of their experimental results concerning the relation of speed versus current
Keywords :
current density; electric motors; machine bearings; machine theory; torque; Gruenberg mechanism; Watson-Williams-Crimp model; ball bearing motors; phenomenological model; speed versus current relation; total torque; Angular velocity; Ball bearings; Current density; Magnetic fields; Mathematical analysis; Mathematical model; Physics; Predictive models; Torque; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
