Direct Torque Control of Brushless DC Motor for Centrifugal Actuators based on dSPACE

In this paper, the mathematical models of the output force and direct torque control (DTC) with flux observer of brushless DC motor for centrifugal actuator are constructed, and the simulation researches based on MATLAB/Simulink and dSPACE are carried out. By using the real-time interface (RTI), the power drive circuit and the centrifugal actuator in the MATLAB/Simulink model are replaced with real objects to realize the hardware-in-the-loop simulation (HILS). With the help of the real-time control tool ControlDesk, the on-line analysis, parameter debugging and physical verification of DTC are carried out. The experimental results prove that DTC applied to the centrifugal actuator has good dynamic response and high control precision, which lays a technical foundation for the application in helicopters.