| 摘要 |
PURPOSE:To make reduction of the material cost and electrical loss, and a small size of the commutating device by a method wherein a DC terminal led from a DC current collecting bus is led out of between the contacts with an arm bus. CONSTITUTION:Each phase winding of a transformer 1 is divided into at least two, end of the divided windings 1a, 1b in the opposite polarity to each other are led outside the transformer in a pair and respectively connected to a pair of the commutation arms of the rectifier 2 in the polarity opposite to each other. At least a pair of the DC terminals P, N to be connected to the current collecting bus 41 are connected between the contacts with either the current collecting bus 41 or the arm bus 4. Whereby the maximum current of the DC current collecting bus is made 6<1/2>I, current values at the terminals P, N can be made small, the electrical losses are reduced and the commutating device can be planned to be made small. |
