| 摘要 |
<p>A voltage control apparatus, particularly for controlling the voltage of a domestic power supply, comprises an electrical input 108, 109, a voltage control means 101, and an electrical output 110, 111. The voltage control means includes a voltage reduction device arranged to selectively reduce the input voltage by subtracting a reduced voltage, derived from the received electrical supply, from the input voltage of the received electrical supply. The voltage reduction device may be a transformer having a primary winding 101a, and at least one secondary winding 101c-f, having a first terminal connected to the input and a second terminal connected to the output, and arranged such that a negative voltage is induced therein, and the output voltage is the summation of the input voltage and the negative induced voltage. A plurality of secondary windings may be provided, each connected to an individual switching arrangement to provide a variable voltage reduction device. A current monitor 104 and a controller 103 may also be provided. A bypass switch 102 may be provided in the event that a non-reduced voltage is required.</p> |
