In order to solve the problem of phase voltage, phase current distortion and torque ripple caused by effect of dead time in the low frequency and light load of sinusoidal pulse width modulation (SPWM) voltage source inverter. A novel selfcalibration method was proposed. The method not only considered influence of dead time, voltage drop of power device, turnon time and turnoff time on the output current of inverter. And the fluctuation of DC bus voltage and carrier frequency was calculated and online compensated. Finally, the experiments were carried out before and after compensation, the results showed that the method had better compensation effect.