the multiple tap transformer is the most common, because it is usually the least expensive 多孔变压器是最常用的方法,因为成本最低。
because of the poor power factor and other concerns regarding a large phase back, multiple tap transformers are recommended even when the control device is a scr 由于缺乏能量的因素还有关于多了一大段的关系,即使当使用可控硅整流器时也推荐使用多插孔变压器。