| 摘要 |
A magnet core for a rotor or stator of an electrical machine, e.g. a motor, generator or transformer, comprises a helically wound coil of electric strip having transverse slits extending from one edge across part of its width and being separated by tongues or teeth such that the slits in successive turns of the coil cooperate to define slots extending generally radially of the coil to receive electrical windings. Electrical windings are housed in the slots, and the tongues are bent radially inwards towards the coil axis so as to close the slots at their upper ends to leave substantially no air gap.
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