Two-dimensional dc Surface Motor Using Window Shaped Coils

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  • 田形コイルを用いた直流サーフェイスモータ
  • デンケイ コイル オ モチイタ チョクリュウ サーフェイス モータ

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Abstract

The authors have been pursuing the possibility of using a two-dimensional dc motor used for a driver of meal assist apparatus. In this paper, a new type do surface motor using window shaped coils (DSM) is proposed by the authors. And the thrust equations of the DSM is shown following the exciting method of the window shaped coils. The driving characteristics of the DSM are summarized as follows:<br>1. The maximum flux density of the air gap is calculated at 0.35 teslas when the exciting current is 1.8 amperes. The flux density achieves only 20% conpered with maximum flux density (1.8 teslas) of the yokes(SS41).<br>2. The thrust constant of the x-direction and y-direction are 2.93, 2.70 N/A respectively, so these difference is within only 8 %, And the maximum static thrust is over 5 newtons when the exciting current was 1.8 amperes.<br>3. It is recognized that the positioning control accuracy is good within 7.5% when the DSM is controlled by PD-control method.

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