| 摘要 |
PROBLEM TO BE SOLVED: To obtain a sufficient power saving effect by connecting in parallel the input side of first power conversion means to a power system, connecting the output side to a primary winding of a transformer via an AC smoothening filter, and connecting the secondary winding to the power system in series. SOLUTION: This equipment connects the input terminal of a voltage amplitude adjuster 21 to single-phase AC input terminals 1A, 2B, connects the output terminal to the primary winding of a transformer 10 having two windings via an AC filter 25, and connects the secondary winding between a single-phase AC input terminal 1A and a single phase AC output terminal 5C. Thus, the single-phase AC is converted into a voltage, having the same phase as the input voltage with a different amplitude, turns into a sine wave voltage having no ripples by an AC filter 25, excites the primary winding of a transformer 10, and outputs a voltage equal to 1/(turn ratio) to the secondary winding. At this time, a voltage appropriate to the load can be supplied to a single-phase AC output terminal by connecting the secondary winding to a polarity which lowers the single-phase AC voltage. In this way, the consumption of excessive power can be suppressed, and a higher power saving effect can be achieved. |
