“十二五”期间,国家将下大决心开展节能减排工作,变频器是完成此任务的重要产品。变频器是利用电力半导体器件的通断作用将工频电源变换为另一频率的电能控制装置,具有对交流异步电机进行软起动、变频调速、提高运转精度、改变功率因数等功能。本文对变频器功能和发展趋势进行预测分析,为生产、使用变频器提供依据。 During the “Twelfth Five-Year Plan” period, the state will make great efforts to save energy and reduce emissions. The inverter is an important product to accomplish this task. Inverter is the use of power semiconductor devices on and off the role of the power frequency power conversion to another frequency of electrical energy control device with AC induction motor soft start, frequency control, improve operational accuracy, change the power factor and other functions. This article carries on the forecast analysis to the frequency changer function and the development tendency, provides the basis for the production, the use frequency changer.