| 摘要 |
<p>PROBLEM TO BE SOLVED: To downsize a transformer and lessen the number of switches so as to simplify the constitution by arranging a tapped winding outside a series- parallel changeover winding. SOLUTION: A tapped winding 15 is arranged outside a high-voltage winding 14 being a series-parallel changeover winding. Then, this transformer is provided with a switch for switching the connection of two windings 14a and 14b of a high-voltage winding 14 in series or in parallel. Together with it, this is provided with a switch for performing the switching of the tap connection of a tapped winding 15 in common to the two windings 14a and 14b. In this case, the two windings 14a and 14b are provided with leads, severally, and this is constituted so that the winding ratio at the time when these two windings are connected in series and the time when these are connected in parallel may come to a value deviated from 2:1. Hereby, the constitution of a transformer at large can be downsized, and also the number of switches can be lessened, whereby the constitution can be simplified.</p> |
