| 摘要 |
A direct - current electric machine includes a rotor rotatable about an axis of rotation and a stator formed with a plurality of locations angularly equispaced thereon and provided with a respective array of horseshoe magnets extending over 180 DEG about a respective helical coil wounded on a coil axis defined by a respective pair of arms mounted on the rotor and coinciding with a tangent to a circle centered in the axis of rotation.
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