唯一的要求是相对移动，而且由于固定电枢及旋转磁场系统具有许多优点，这种安排是所有容量超过几千伏安的同步机的标准作法。

• here the only requirement is relative motion, and since a stationary and a rotating field system have numerous advantages, this arrangement is standard practice for all synchronous machines rated above a few kilovolt-amperes.