| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain an electromagnetic coil having insulating layers which can share electricity-application life characteristics, manufacturing properties, and costs, or electricity-application characteristics and heat conduction properties in a well-balanced manner. Ž<P>SOLUTION: The electromagnetic coil is constituted in such a manner that: the coil obtained by being wound with, the prescribed number of times, an insulated electric wire having an insulating layer of a two-layer constitution is arranged so as to be sandwiched between constructions on the external peripheral face of a coil conductor; the insulating layer of the two-layer constitution is composed of the insulating layer A having the intensity E<SB>1</SB>of an electric field whose electricity-application life is 300,000 hours, and the insulating layer B having the intensity E<SB>2</SB>of an electric field whose electricity application life is 300,000 hours; and the electric field is concentrated on either of surfaces of the coil conductor and the construction. The electromagnetic coil is also characterized by arranging the insulating layer B at a side to which the electric field is concentrated when the intensity of the electric field is in a relationship of E<SB>1</SB><E<SB>2</SB>. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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