电动机在轻负荷或空负荷运转时,效率低,损耗大,而电动机又是用量很大的动力设备。因此,降低电动机在空载或轻载时的损耗,对节约电能具有很大的意义。经过试验研究,我厂制造成功感应电动机星角接线自动变换节电器。在几种机床上试用这种节电器的结果表明,节电量随轻载的程度和时间而变化,最高可节约电动机实耗电量的30％。 When the motor is running at light load or no load, the efficiency is low and the loss is large. However, the motor is a large amount of power equipment. Therefore, reducing the loss of the motor at no-load or light-load has great significance for saving power. After the pilot study, I plant the successful manufacture of induction motor star angle automatic switching Saver. The trial of this Power Saver on several machine tools showed that the power savings vary with the degree of light load and time, saving up to 30% of the actual motor power consumption.