Review of Direct Torque Control Strategies for Permanent Magnet Synchronous Motors

Permanent magnet synchronous motors (PMSM) have received intensive attention in recent years as one of the primary drivers for alternative fuel vehicles. The direct torque control (DTC) approach is used in permanent magnet synchronous motors due to its quick reaction time. However, classic direct torque control cannot satisfy the demands of modern manufacturing. As a result, scholars have developed several advancements based on it. First, the traditional direct torque control principle is briefly outlined, followed by a discussion of its limitations. The recent research on duty cycle-based, model prediction, and direct torque control systems combined with artificial intelligence is then summarized. Finally, the future research development direction is outlined and forecasted.