What is the current relationship between transformer primary coil and secondary coil?

当变压器带有负载运行时， 次级线圈电流的变化， 会引起初级线圈电流相应的变化。根据磁势平衡原理推导出， 初级民次级线圈的电流和线圈匝数成反比， 匝数多的一边电流就小，匝数少的一边电流就大， 可用下式表示：初级线圈电流/次级线圈电流=次级线圈匝数/初级线圈匝数。

When the transformer operates with load, the change of secondary coil current will cause corresponding change of primary coil current. According to the principle of magnetic potential balance, the current of primary and secondary coils is inversely proportional to the number of turns. The current on the side with more turns is smaller than that on the side with less turns. It can be expressed by the following formula: primary coil current / secondary coil current = secondary coil turns / primary coil turns.