| 摘要 |
A voltage regulation device has a transformer 2 with a set of independent primary windings P1, P2, P3 and a secondary coil S1 in series with the unregulated input voltage. Relays 10, 12, 14, 16 on the low current primary side are switched by a control processor 20 to energize selected primary coils P1, P2, P3 in order to add or subtract from the input voltage by a predetermined amount, delivering a regulated voltage output. The primary windings P1, P2, P3 can be bypassed if no correction is required. A current monitor 50, 52 may be provided, as may a temperature monitor 54, to determine the control of the relays 10, 12, 14, 16, which may be latch relays. A time delay may be imposed before adjusting the voltage correction, which may be inversely proportional to the size of the correction required. A micro-generator, such as a solar cell, may be detected by the controller 20 by measuring the phase of the current waveform, and an energy consumption unit, such as a water heater, may be activated to consume surplus energy from the micro-generator. |
