| 摘要 |
The invention relates to miniature electric motors, more particularly to monophase synchronous motors of the type the motor of which includes two pole pieces respectively polarized positively and negatively by the current circulating in an energizing coil, these pole pieces having each N teeth and defining a gap in which is placed a thin, disc-shaped rotor of hard magnetic material. The rotor comprises two annular coaxial portions magnetized with respectively N and N/2 pairs of alternately positive and negative poles.
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