Maximum Torque Per Ampere Control of Permanent Magnet Reluctance Hybrid Rotor Dual Stator Synchronous Motor Based on Sliding Mode Current Decoupling

Traditional low speed high torque Permanent Magnet Synchronous Machine (PMSM) has low internal space utilization and low power density. Permanent Magnet Reluctance Hybrid Rotor Dual Stator Synchronous Machine (PMRHRDSSM) has added an inner stator to the PMSM cavity and replaced the permanent magnet rotor with a hybrid rotor composed of permanent magnet, magnetic isolation ring, and reluctance, improving the space utilization and power density of a single stator PMSM. However, the special electromagnetic relationship of PMRHRDSSM makes the Maximum Torque Per Ampere (MTPA) control strategies of traditional PMSM and Synchronous Reluctance Motor (SynRM) unsuitable for this type of motor. In addition, traditional deviation decoupling current loop controllers have poor robustness and cannot meet the requirements of high performance control fields. This paper proposes a Maximum Torque Per Ampere Sliding Mode Current Decoupling (MTPASMCD) control method suitable for PMRHRDSSM. This paper establishes a mathematical model of PMRHRDSSM in the reluctance dq coordinate system at first. Then, the MTPA control current vector trajectory equation for PMRHRDSSM was derived. Afterwards, a Sliding Mode Current Decoupling (SMCD) current loop controller for PMRHRDSSM was designed. Finally, the experimental results have verified the effectiveness and superiority of the proposed control strategy.