Accurate motor parameters are essential to improve the quality of motor vector control. The motor was injected of different voltage signals by inverter. Then the values of voltage and current signal was detected and calculated. Based on the T equivalent model, the parameters value of the motor was identified. The motor stay in static state during the process, and no additional hardware is required. For the output error of inverter, in addition to the general compensation, the method of the DC bus voltage compensation is used. Finally, the experiment is verified on the motor control platform in the MC56F84763 DSP chip as the core. The errors of parameter identification results with the values of traditional testing methods are about 3%.