| 摘要 |
PURPOSE:To obtain a field unit which has an inexpensive manufacturing cost by ground insulating a field coil only on a linear part of a rotary electric machine in its axial direction. CONSTITUTION:A field coil 3 is composed of a flat conductor 3a provided on a field core 2 between a yoke 1 and a pole shoe 2b, an interlayer insulator 3b mounted between the layers of the conductor 3a and a ground insulator 3c. The insulator 3c is provided only in a range of the linear part l2 of a rotary electric machine in its axial direction, and the ranges of the both ends l1 of the electromagnetic coil 3 are not provided with the insulator 3c, but exposed at the condutor 3a. Further, the exposed parts of the conductor 3a at the ends of the insulator 3c, i.e., at both ends l1 of the electromagnetic coil 3 and necessary creeping distance l3 to the core 2 are obtained by cutting the four corners 201 of the core 2.
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