| 摘要 |
The purpose of this invention is in showing power circuit which can supply power for heater efficiently, when used as an A.C power circuit in both of A.C. ,D.C. power using eletric machines. This composed of A.C. power plug(10), D.C power plug(11), transformer(1), heater(8), and load(6) supplys power not only for load(6) through the primary, the secondary winding of transformer and rectifier, but for heater by the third winding of transformer, when A.C power plug is in connected with power socket.
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