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采用负反馈方式达到高效率的交流稳压器已经实现。这种设备用在交流电源上具有优良的调整率和相当大的输出功率。如采用一特殊电路,更容易使实际效率高达95%,而电压调整率达到0.02%。这种典型的交流稳压器已制出,如图8所示,当输入的电源电压Vin在115伏到140伏(有效值)之间变化时,在137欧的负载电阻上,输出50赫兹111伏(有效值)的交流电压,其输出功率为90瓦。当输入的电源电压在下限时,稳压器的总效率为96.5%;当输入的电源电压在上限时,稳压器的总效率下降到79.3%,平均效率为88%。输入电压波动25伏时,输出电压仅变化0.1伏(有效值),所以得到的调整率为0.4%。这种线路除了作为稳压器用在电视机、电冰箱和小电机等设备上外,还可作为一种控制部件用在其他许多设备上,如调温器、调速器等。
AC regulators with negative feedback to achieve high efficiency have been implemented. This equipment used in the AC power with excellent regulation and a considerable output power. Such as the use of a special circuit, it is easier to make the actual efficiency of up to 95%, while the voltage regulation rate of 0.02%. This typical AC voltage regulator has been developed, as shown in Figure 8, when the input supply voltage Vin varies between 115 volts and 140 volts (rms), at a 50 ohm load on a 137 ohm load resistor 111 volts (RMS) AC voltage, the output power of 90 watts. The total efficiency of the regulator is 96.5% when the input supply voltage is at the lower limit. When the input supply voltage is at the upper limit, the overall efficiency of the regulator drops to 79.3% with an average efficiency of 88%. When the input voltage fluctuates 25 volts, the output voltage changes only 0.1 volt (rms), so the adjustment rate is 0.4%. In addition to being used as a voltage regulator for TVs, refrigerators and small motors, this line can also be used as a control for many other devices such as thermostats, speed regulators and more.