On the Inductance and Force Calculation of a Three Axes Torque Motor

Abstract

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Dynamic modelling of a synchronous linear motor with permanent magnet excitation and solid yokes

“…The three axes torque motor was presented first in [1]. Stator and rotor yoke are made of solid steel to give the spherical shells a high mechanical strength.…”

“…A severe drawback of this design concept could be a too low dynamic response due to eddy currents in the yokes from solid steel. In [1] it was shown that indeed a reluctance motor would be unsuitable for this concept. On the other hand, it turned out that a permanent magnet motor with high energy magnets is well appropriate to generate the nominal data of 700Nm at 100Hz without delay.…”