Finite Control-set Predictive Direct Torque Control with Maximum Torque per Current Criteria for Synchronous Motor Drives

The paper deals with the correct formulation and implementation of a predictive torque control algorithm based on the maximum torque per current criteria. The algorithm aims to achieve fast torque reference tracking or maximum torque per current operation during torque transients. The key to the proposed method lies in accurately knowing the nonlinear rela-tionship between currents and magnetic flux linkages. The cost function is appropriately designed to achieve the desired control objectives. The design of the weights is discussed and supported by experimental tests. To validate the method, experiments were conducted on a test rig equipped with an interior permanent magnet motor synchronous electric drive.