Based on voltage-second balance principle, a simple SVM control algorithm is proposed in this paper. This algorithm can effectively simplify the calculation and reduce calculation time greatly. Our analysis and the result from simulation indicate that the control effect is same to that of the traditional SVM. Furthermore this algorithm does not need to perform the sine and cosine calculations, and thus it is more convenient and effective than the traditional SVM algorithm. In addition the sampling period can be shorten, and can be used to improve the controlling effect of inverter.