| 摘要 |
<p>PURPOSE:To enable the extensive phase adjustment to be performed by providing intermediate lead wire parts at a plurality of locations, with each location being provided with a specified ratio to the total number of turns from the terminal side, and by switching the connection between the terminal side and the lead wire part which is located at the same sequential order from the oposite side in the neighboring phase, by way of switches. CONSTITUTION:AC windings are so arranged that their phases are phase I, phase II, and phase III in the advancing order of the phase. The number of the lead wire parts are provided at location separated by 2/3 sintheta, 2/3 sin2theta,..., 2/3 sinNtheta of total turns from the ter minal side of each phase. For example, in the case of phase difference theta=10 deg. and N=6 in the phase I, the lead wire 1 is provided at one end of the AC winding 22, and lead wires 2-6 are provided at the location 2/3 sin10 deg.-2/3 sin60 deg., respectively. The winding is connected to a pair of tap switches. As the same procedure, the lead wires 8-14 are provided in the AC winding 23 in the phase II, the lead wires 15-21 are provided in the AC winding 24 in the phase III, and they are connected to the tap switches so as to correspond to the lead wires 1-6 in the phase I. The lead wires 7 and 8, 14 and 15, and 21 and 1 are connected by the tap switches, respectively, that is, the Mth wire from the terminal side and the Mth wire from the opposite side in the neighboring phase are connected, and the switching is performed.</p> |
