時計用ステップモータの特性と効率との関係 : その1 (1984年秋季講演会)

概要

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The efficiency n of PM-stepping Motor is defined in this paper as n = πΩ/Wmin, where Wmin is the minimum input energy reguired for the ordinary step motion, π the rotor mean pass of the 2-pole PM-stepping motor driven by Wmin, and Ω the frictional load acting on the motor. The efficiency is calculated through the simulation in which the expressions corresponding to the differential equations (1)and (2) in the paper are used. Many sample motors are examined for the identity test between the motions obtained by the simulation and those by the stepping motors in practice. The results obtained are as follows : 1) When the torque ratio z is introduced as the ratio of frictional load to index torque amplitude, the optimum value of z is nearly equal to 3 from the points of view of the efficiency and the reliability of stepping motor. 2) The optimum setting angle of the rotor by the index torque is approximately 45 degrees from the same point of view as above. 3) The method of calculation to obtain the optimum frictional load of stepping motor is introduced.
社団法人日本時計学会の論文
1984-12-20