DTQ 型半导体电压调整器(原理图见图1),普遍使用在东风型和部分东方红型机车上,该型调整器是六十年代末研制的,由于当时我国高反压的大功率晶体管较少,电路设计选用了3AD6C 和3AD30C(DTQ-1型电压调整器用3AD18D)锗管。经多年运用表明,它的可靠性差,元件损坏严重,尤其是大功率晶体管经常因击穿而损坏,给检修和运用带来了很大的困难。 DTQ-type semiconductor voltage regulator (schematic diagram shown in Figure 1), commonly used in Dongfeng and some Dongfanghong locomotives, the regulator was developed in the late sixties, because at that time, China’s high-voltage high-power transistors than Less, the circuit design used 3AD6C and 3AD30C (DTQ-1 type voltage regulator with 3AD18D) germanium tube. After years of use, it shows that its reliability is poor, serious damage to components, especially high-power transistors are often damaged due to breakdown, to repair and use has brought great difficulties.