A new approach to Predictive Torque Control with Dual Parallel PMSM system

An original approach to Predictive Torque Control “Split and Seek” (PTC SS) for Mono-Inverter Dual-Parallel Permanent Magnet Synchronous Machines (PMSM) system is presented. Only one cost function for both PMSM is defined to be minimized through the PTC approach. Unlike the Master-Slave classical control, solution of the cost function will depend on both PMSM references. The principle of this approach is to extend the possibilities of control by offering additional virtual vectors and to find the vector which minimizes the cost function. This process includes two steps: first one is searching for the angle and second one is searching for the magnitude. A model of the system is used to predict the behavior in the next sampling interval under these different virtual voltage vectors. After that, space vector modulation (SVM) technique will be applied to synthesize this vector. Simulations were built under Matlab/Simulink software to verify the applicability of this new approach. The obtained results verify the synchronism of two machines and the correct current tracking under different load and speed conditions. The performance improvement is highlighted from specific tests.