我们山西洪洞县有很多电站,由于没有磁场变阻器,在长期运行中感到很不便利,使发电机的转速和激磁电流不能配合,在低转速下电压即升至额定值。以及激磁电流很大,一则发电机容易发热,二则影响电动机启动。特别在电机和外线发生了故障时,不好处理,只有关闭进水闸。目前变阻器暂时供不应求,即便买到也不合适,往往是电阻太大。若稍调动一点,发电机就产生灭磁现象,影响生产。为了解决这一困难,我们参考了河南等省的经验,试制成功了铁丝变阻器。经过使用,性能良好,价值便宜。现将制作和使用情况介绍如下:电阻器原材料采用18号铁丝绕制成内直径17毫米的螺旋形,固定触点和可动触点,利用废换相器代替即可。变阻丝的绕制是用 We Shanxi Hongtong County, there are many power plants, because there is no magnetic rheostat, in the long run feel very inconvenient, so that the generator speed and excitation current can not be matched at low speed, that is, the voltage rose to the rated value. And a large excitation current, a generator easy to heat, the second will affect the motor start. Especially in the motor and external fault occurred, not good to deal with, only to close the floodgates. The current rheostat temporarily in short supply, even if bought is not appropriate, often the resistance is too large. If a little move a little, the generator will produce demagnetization, affecting production. In order to solve this difficulty, we refer to the experience of other provinces in Henan, the trial success of the wire varistor. After use, good performance, the value of cheap. Now the production and use of the introduction are as follows: Resistor raw materials made of 18-wire wound around 17mm diameter spiral, fixed contacts and movable contacts, the use of waste inverter instead. Winding wire resistance is used