ThispaperpresentsasimplifiedHFinjectionmethodforpermanentmagnetsynchronousmotor(PMSM)sensorlesscontrol.ThediscussedHFinjectionschemeutilizesmotormagneticsaliencypropertywhichcontainstheinformationoftherotorpositionduetomagnetsaturation.Ahighfrequencyvoltagesignalisinjectedintothed-axis