变频技术在低压电机中的节能应用

Inverter Technology In The Low-voltage Electrical Energy-saving Applications

给煤机控制方式原先采用滑差式控制电机的转速,此种方式虽然在一定程度上减少了电能的消耗,但是节能效果差,事故率高。大容量的低压风机160kW电动机采用直接启动方式,启动时对变压器造成很大的电流冲击,多次造成低压断路器损坏无法正常投用,严重影响安全生产。我国有逾六成的用电量是被电机消耗的。受电机内部结构等因素的限制,电机在实际工作中,不论负荷大小,都按一定的转速运行,从而成为耗电大户。

I had to coal companies control the original use of slip - control control of motor speed, in a way ＇although to a certain extent, reduce the power consumption, but energy - saving effect of poor, with the use of eleetrical slip time and the accident rate of growth Increased operating costs rising year by year, the boiler can not guarantee safety and long cycle of safe operation. I companies large low - pressure fan （160kW） motor launch direct way, when the plant started producing transformers with a great impact on the current, low - voltage circuit breaker repeatedly caused damage can not be used for norreal, a serious impact on our company＇s production safety. China has more than 60% of the electricity consumed by the motor. The internal structure of the motor factors such as the restrictions, the electrical ia practical work, regardless of load size, according to a certain speed operation, thus becoming major power.