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1.概述 在交流电动机调速传动中,采用变频调速既可实现无级调速,满足生产工艺过程对电动机调速控制的要求,提高产品的产量和质量,又可大幅度节约电能,降低生产成本。使用变频调速器的优越性已逐渐为国内大多数企业所重视。目前国内所应用的各类变频器其电压等级多为380～460V,属低压型变频器,而大多高压(3kV、6kV、10kV)电动机传动的风机、泵类设备,只有个别单位采用了高压变频器传动,收到了很好的节电效果,节电率达40％～50％。变频调速装置的投资可在1～2年内从节电费用中收回。
1. Overview In the AC motor speed drive, the use of variable frequency speed control can achieve stepless speed regulation to meet the production process of the motor speed control requirements, improve product yield and quality, but also substantial savings in electricity and reduce Cost of production. The advantages of using frequency converter has gradually been valued by most domestic enterprises. At present, the voltage level of various inverters used in China is mostly 380-460V, which is a low-voltage inverter. However, most of the fans and pumps of high-voltage (3kV, 6kV, 10kV) motor drives use only high- Device drive, received a good energy-saving effect, saving rate of 40% to 50%. The investment of frequency conversion speed control device can be recovered within 1 ~ 2 years from the electricity saving cost.