| 摘要 |
An electric adjuster is designed to permit an a.c. power supply or an a.c. signal as an input to be arbitrarily adjusted or converted with high efficiency and outputted. The ratio of windings of a transformer can be arbitrarily adjusted or continuously adjusted. If the number of primary coils is 6, as a first example, the electric adjuster includes a transformer (3) having a secondary coil (37) and a plurality of primary coils (31), (32), (33), (34), (35) and (36) whose ratios of windings to the secondary coil (37) are 1, 2, 4, 8, 16 and 32, respectively, and a coil switching operation section (2) that switches the combinations of the primary coils (31) to (36) using a plurality of switches (21), (22), (23), (24), (25), (26), (27), (28), (29), (210), (211) and (212), to make the number of composite windings variable, with the result that the ratio of primary windings to secondary windings is continuously digitally adjusted. In a second embodiment, one primary coil and a plurality of secondary coils are used. In a third embodiment, a plurality of primary coils and a plurality of secondary coils are used.
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