primary winding

The using ratio of the electric energy is greatly raised by using the feedback energy from the primary winding of the high frequency transformers.

该电源采用双管正激的主电路结构，用高频变压器的电感取代了限流电阻，利用了高频变压器初级绕组的反馈电能，极大提高了电能利用率。

The strength calculation method and the structure of current transformer with U primary winding to fulfil the dynamic stability requirements are introduced, and some calculating examples are given.

介绍了U形一次绕组电流互感器可满足动稳定要求的结构及强度计算方法，并给出了计算实例。

Calculation of Dynamic Stability of Current Transformer with U Primary Winding

U形一次绕组电流互感器的动稳定计算

The primary side of the three-phase secondary line winding transformer is directly connected with the voltage output end of the three phase network;

所述三相多副边绕组变压器的原边直接或通过高压开关与三相电网的电压输出端相连；

Through various short-circuit current temperature rise test results, the transformer temperature, time, and a high degree of three curves, obtained directly within the thermal region transformer primary winding height of about 83.3%.

通过在不同短路电流条件下的温升试验，得到了变压器内部的温度与时间、纵向高度之间的关系曲线，得出变压器内部热区域主要集中在约绕组自下而上高度的83.3%区域。

Antifeudal always is one of primary missions which the 20th century China revolutionizes, its course is winding.

反封建一直是二十世纪中国革命的主要任务之一，其历程是曲折的。