摘要
交流电动机是广泛用于各领域的重要动力设备,电动机数值可观的启动电流及其对供电系统的影响长期困扰着人们,传统的各种启动方式都有这样或那样的弊端。自变频调速器问世以后,交流电动机的软启动很好地解决了这一问题。但当前大量出现的问题是电动机升速到接近额定转速切换到电网电源过程中,常常造成很大的冲击并引起电动机保护跳闸,使切换失败。交流电动机并网控制器很好地解决了这一问题,实践证明电动机的电源切换是能无扰动平滑切入电网的。
Alternating current motor is the important power equipment However, the considerable applicated in various fields. starting current of the motor and its impact on the power supply system cause a lot of troubles and various conventional starting modes have their disadvantages. As the appearance of frequency convertor, the soft aart of the alternating current motor has given a good solution to above troubles. The frequent problem at present is the large shock caused by the motor during speeding up to its rated speed and switching tO the power grid. This large shock often trips the motor protection, resulting in failure switching. The parallel connection device for the alternating current motor can solve this problem effectively, It is proved that the motor can be smoothly switched to the power grid with the application of parallel connection device.
出处
《建筑电气》
2008年第8期38-40,共3页
Building Electricity
关键词
变频调速器
同期
冲击
Frequency governor Synchronization Shock
