| 摘要 |
PROBLEM TO BE SOLVED: To develop a circuit system for reducing the size and weight of a heavy transformer. SOLUTION: When power is alternately inputted to two transformers by switching a commercial AC power supply 3 itself at a high speed (10 to 100 kHz), voltage values corresponding to the ratio of the numbers of windings are alternately outputted from the two transformers, but since the output sides of these transformers are connected in parallel, a sine wave of continuous commercial frequency can be obtained as a synthetic output. Since the switching system is adopted, the size of the transformer can be reduced in accordance with the increment of switching frequency and the weight can be reduced at least to 1/3.21 at 10 kHz and maximum to 1/22.4 at 100 kHz.
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