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我厂生产胶木粉,有种主要生产设备叫轧辊机,它的电动机在75千瓦左右。在市革委会领导同志提出的异步电机同步化“要认真推广”的号召下,在厂党支部、革委会领导下,发动群众,组织电工及有关同志去胶鞋一厂等单位学习,发现他们异步电机同步化使用在空压泵上,效果很好。我们轧辊机平均负载较低,但是冲击性的,有些产品短时超载达30％以上,照兄弟单位的经验硬搬是不行的。因为这时电机就要失步。怎么办?经过大家群策群力,最后采用了可控硅技术,在重载时就加上激磁电流,轻载时减少电流使电机转子温升在额定范围之内。我们于1971年10月搞好一台,又于今年7月试车成功二台,现都投入了运行。现在来看这种电源的优点: 1.介决了我厂冲击负载电机的同步化问题,挖掘了无功潜力,每台可达50千瓦。 2.合理调节励磁电流,使转子滑环温升较小些。 3.如电网电压或励磁电路阻值变化,具有一定的补偿,使工作稳定。现将自调式励磁电源介绍如下:(见图示)
I plant production bakelite powder, a kind of major production equipment called roll machine, its motor at 75 kilowatts or so. Under the leadership of the Factory Party Branch and the Revolutionary Committee under the guidance of the leading comrades of the Revolutionary Committee of the Revolutionary Committee, the synchronization of asynchronous motors proposed by the leading comrades of the Revolutionary Committee of the Revolutionary Committee should be mobilized to learn from the masses and organize electricians and comrades to go to the Rubber Shoes Factory and other units to find out Their asynchronous motor synchronization used in the air pump, the effect is very good. The average load of our roll machine is lower, but the impact of some products over short-term over 30%, according to the experience of brother units hard to move is not acceptable. Because then the motor will be out of step. What to do? After all the team work, and finally the use of thyristor technology, coupled with the heavy load when the excitation current, light load to reduce the current rotor temperature rise within the rated range. We did a good job in October 1971 and succeeded in commissioning two vehicles in July this year. Now we are running into operation. Now look at the advantages of this power supply: 1. I decided to plant the impact of load synchronization motor problems, tap the potential of reactive power, up to 50 kilowatts each. 2. Reasonable adjustment of excitation current, the rotor slip ring temperature rise smaller. 3. If the grid voltage or excitation circuit resistance changes, with a certain degree of compensation, so that work stability. Now self-tuning excitation power introduced as follows: (see picture)