Single Q-Axis Current Reference Control Strategy Based on Line-Constrained EMPC for SPMSMs

This paper proposes an improved line-constrained Explicit Model Predictive (EMPC) single q-Axis current reference control strategy for surface-mounted permanent magnet synchronous motors (SPMSMs). The traditional EMPC algorithm is challenging to run on low-cost devices due to its high memory consumption. The improved algorithm adopts the strategy of line-constrained EMPC to directly constrain the d-axis current to 0A, eliminating the need for information about the d-axis current reference in the state variables. Compared to the traditional line-constrained EMPC algorithm, the improved algorithm further reduces the model dimensions. In this way, the memory usage and execution time of the line-constrained EMPC are further reduced, thereby improving efficiency. The superiority of the algorithm was validated through simulations and experiments.