| 摘要 |
An improvement on the stator structure of external-rotor consists of the start-up coils and operating coils wound into the silicon steel race, wherein the said silicon steel race comprises a plurality of insulation columns and rabbets, and each insulation column has a wall formed at its external edge thereof, and more over, the said start-up coil is being wound-up, according to the clockwise sequence, at two rabbets positioned at each side of the datum point in an equal-length distance respectively thereto, in order to construct four sets of start-up coils by means of two corresponding sets of cross coils; in addition, there are another four sets of operating coils constructed at the top and bottom of datum point respectively, which are wound-up by means of two corresponding sets of cross coils in an equal-length distance respectively thereto, and thereat the said four sets of operating coils are covering onto the external edge of said start-up coils, so that both the start-up coils and operating coils will be uniformly distributed within the wall of said silicon steel race and in this way it will be able to protect and save its coil quantity and, thus acquire a practical effect on reducing the production costs and saving the electricity consumption.
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