| 摘要 |
PURPOSE:To perform magnetization with high resolution so that the position accuracy of magnetic poles is good by controlling a magnetizing power source with the output of a reference encoder. CONSTITUTION:The reference encoder 8 has a zero signal for generating one pulse corresponding to each round and an incremental signal obtained by dividing one round equally. A shaft 7 is rotated by a motor 9 and when the zero signal is generated, a controller 10 starts counting with a 1st incremental signal generated after the zero signal is generated. Then the incremental signal which begins to be counted is frequency-divided at a prescribed frequency division ratio through the frequency divider 10-1 of the controller 10 to output a frequency-divided signal. Then the magnetization power source 11 outputs a magnetizing current to an exciting coil 13 with the frequency-divided signal output in synchronism with it. Consequently, the magnetization wherein the positions of respective phases are coincident completely is easily performed.
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