An application of the AFE frequency converter to a beam type oil pumping set

According to the porblems existing in the reformation of frequency converters for use with an oil pumping set,the paper makes a theoretic analysis of the AFE technology,control characteristics and the method to set technical parameters.The AFE can improve the performance of a frecuency converter,increase the efficiency of an oil pumping set and save energy.The significance of its application is also described.