A parameter identification scheme of permanent magnet synchronous motor(PMSM) is proposed, which is easy to implement in engineering. Firstly, a set of excitation with different frequency, phase and voltage combination is applied to the measured PMSM and the response signal is collected. The stator resistance and the inductance of direct and quadrature axis are obtained by least square curve fitting, then start the motor to the set frequency, suddenly block the output, collect the generation voltage of the PMSM. The algorithm is integrated in the inverter controlled by SVPWM, and the parameters of the controlled motor can be identified without additional equipment, so as to support the implementation of speed sensorless control. The simulation shows that the identification scheme has sufficient precision to meet the need of speed sensorless control, and has guiding and reference significance for practical engineering applications.