Apparatus And Method For Rotating-Sensor-less Identification Of Magneto-Mechanical Parameters Of An AC Synchronous Motor

PM 1d 1q 1q 1q 1qA method for the identification without a shaft encoder of magnetomechanical characteristic quantities, in particular the mass moment of inertia J and the permanent magnetic flux ψbetween rotor and stator of a three-phase synchronous motor, comprising: -constant voltage supply Uin the d flux axial direction; -test signal voltage supply Uin the q transverse flux axial direction; -measuring signal current measuring Iof the q transverse flux axial direction; -identification of magnetomechanical characteristic quantities of the synchronous motor on the basis of the test signal voltage Uand of the measuring signal current I; whereby the rotor can execute deflection movements with pre-definable maximal amplitudes. Method use also for control of electrical drives. An identification apparatus for determination of magnetomechanical characteristic quantities of a synchronous motor that also relates to a motor control device, whereby the identified characteristic quantities can be used for the determination, optimization and monitoring of a motor control.