| 摘要 |
PURPOSE:To provide an auxiliary magnetic flux which is matched to the distribution of the reactance voltage of the rectifying coil irrespctive of the rotating direction by providing projections at the end of an interpole core, winding an auxiliary coil on the projections, and connecting the coils through diodes to the main part of the auxiliary coil. CONSTITUTION:Projections 12A, 12B are formed in the shape at both sides of the rotating direction at the end of an auxiliary core 11. The main part 13 of an auxiliary coil is wound on the main part of the core 11, and auxiliary coils 14A, 14B are individually wound on the pronjections 12A, 12B. The coils 14A, 14B are commonly connected at the respective one ends, and connected at the other ends through diodes to one end of the coil 13. In this case, the diodes are connected in reverse polarity to each other in such a manner that the polarity is determined so that the auxiliary coils connected in series with each other are at the advancing side of rotating direction or beforehand side. |
