Program features 61Motor control Motor typesThe drive supports the following motor types:• Asynchronous AC induction motors• Permanent magnet (PM) motors• Synchronous reluctance motors (SynRM).Parameters and diagnosticsParameters: 99.03 Motor type Motor identificationThe performance of vector control is based on an accurate motor model determinedduring the motor start-up.A motor Identification magnetization is automatically performed the first time the startcommand is given. During this first start-up, the motor is magnetized at zero speedfor several seconds to allow the motor model to be created. This identification methodis suitable for most applications.In demanding applications a separate Identification run (ID run) can be performed.ParametersParameters: 99.13 ID run requested Power loss ride-throughSee section Undervoltage control (power loss ride-through) on page 84. Vector controlVector control is the motor control mode which is intended for applications where highcontrol accuracy is needed. It requires an identification run at startup. Vector controlcannot be used in all applications.The switching of the output semiconductors is controlled to achieve the requiredstator flux and motor torque. The switching frequency is changed only if the actualtorque and stator flux values differ from their reference values by more than theallowed hysteresis. The reference value for the torque controller comes from thespeed controller or directly from an external torque reference source.Motor control requires measurement of the DC voltage and two motor phasecurrents. Stator flux is calculated by integrating the motor voltage in vector space.Motor torque is calculated as a cross product of the stator flux and the rotor current.By utilizing the identified motor model, the stator flux estimate is improved. Actualmotor shaft speed is not needed for the motor control.
