A Static Voltage Regulator Insensitive to Load Power Factor
Claude M. Summers, T. T. Short · Transactions of the American Institute of Electrical Engineers · 1942
THE voltage regulator described in this paper is intended for those applications where the operating efficiency is of secondary importance to other requirements. Excluding the consideration of efficiency, the output voltage of an ideal voltage regulator should be of sinusoidal wave form and should remain constant with any variation in input voltage and frequency and any variation in load volt-amperes and power factor.