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一个能够直接在电网运行的有很高稳定度并具有相当功率的交流稳压器是通过一个以提高效率为目标的负反馈线路来实现的。采用一个小小的附加电路就能很容易使实际效率高于95%,且稳定度优于0.02%。为了阐明这个方案,本文提出一个模型交流稳压器,它能为137欧姆电阻负载提供90瓦输出功率(V_0=110伏,50赫芝),其输入电源的波动在V_(in)=115～140伏(有效值)之间。当输入为低限时总效率是96.5%;当输入为高限时总效率降到79.3%,平均效率为88%。因输入波动25伏引起输出电压变化仅仅0.1伏左右,所以电压稳定度为0.4%。它除了用作电视机,电冰箱和小马达的稳压器外,该方案更适合于许多一般的控制系统如温度调节器和速度调节器等等。
A highly stable and power-efficient AC voltage regulator that operates directly on the grid is achieved through a negative feedback line with the goal of increasing efficiency. With a small additional circuit, the actual efficiency can easily be above 95% and the stability is better than 0.02%. To illustrate this scheme, a model AC regulator is proposed to provide 90W output power (V_0 = 110V, 50HZ) for a 137 ohm resistive load with input power fluctuations between V_in = 115 ~ 140 volts (rms) between. When the input is low, the total efficiency is 96.5%; when the input is high, the total efficiency drops to 79.3% and the average efficiency is 88%. Due to the input fluctuation of 25 volts caused by changes in output voltage of only about 0.1 volts, so the voltage stability of 0.4%. In addition to its use as a television, refrigerator and small motor regulator, the program is more suitable for many general control systems such as temperature regulators and speed regulators and so on.