| 摘要 |
The invention relates to a brushless motor or generator, in which the ratio of the number of stator slots to the number of rotor poles is fractional characterised in that the rotor has a pole-free zone (4) or zone between poles with an increased angle, a result of adding the fractional part of dividing the number of stator slots between the number of rotor poles into the space between magnets, wherein (N) is the number of stator slots and (P) is the number of rotor poles with magnets inserted, (N) and (P) being values such that their (N/P) ratio is fractional, the fractional part (Y) being defined as: Y = (N/P) - Ent(N/P), and the pole-free zone (²) equals (360/N)*Y. Dynamic compensation is achieved either by a number of recesses (5) or by filling material in the longitudinal groove (6) of the pole-free zone (4). |
