The harmonic compensation currents proportional to the harmonic current in the primary winding, which is detected real-timely, are injected to the multiple secondary winding of the transformer.
实时检测变压器原方绕组的谐波电流，通过逆变器产生与原方绕组谐波电流成比例的谐波补偿电流注入变压器副方多补偿绕组中。
Double step drum is an integral drum with stepwise flanges and double step sections. It allows the multiple layer rope winding in non-operating portion of luffing mechanism to make drum shorter.
双阶梯卷筒是一种带有阶梯法兰盘和双阶梯截面的综合式卷筒，可在变幅机构的非工作区段使钢丝绳多层卷绕，以缩短卷筒长度；
Directing to the problem of ac double-drum single rope winding lifter working in multiple level without electric brake in middle level, put forward the reform plan.
针对交流双滚筒单绳缠绕式提升机在多水平运行时，中间水平没有电气制动的问题，提出改造方案。
To increase the capacity of the active power filter, a novel transformer structure with multiple compensation winding is proposed.
这种有源电力滤波器的大容量通过变压器二次侧多绕组结构来实现。
To increase the capacity of the active power filter, a novel transformer structure with multiple compensation winding is proposed.
这种有源电力滤波器的大容量通过变压器二次侧多绕组结构来实现。
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