Research on BLDCM DTC torque setting based on sliding mode variable structure

With the continuous progress of today’s control theory and microelectronics technology, brushless direct current motor (BLDCM), as the product of the combination of the above technologies, has been widely used in the field of motor systems from the earliest application in the field of military aviation to the current popularity in the field of industry, transportation and household appliances. However, the problems of starting and low speed performance caused by torque pulsation greatly limit its development in the field of higher precision requirements. On this basis, the sliding mode variable structure is applied to the torque setting module of BLDCM-DTC instead of the traditional PI control. The sliding mode control method based on traditional linear sliding mode surface and exponential approach rate is analyzed, and then the sliding mode control method based on nonlinear integral sliding mode surface and hybrid approach rate is designed. Analysis of modeling and simulation.