| Brushless DC Motor has not only the simple structure and operation reliability as AC Motor, but also has the good performance of speed control which DC motor has, so it develops fast and wildly used in various fields these years. In some special application area, ordinary control strategy is not fit for the Brushless DC Motor without mechanical load.In this Master Thesis, the Brushless DC Motor fundamental principle and control system structure is introduced based on the Mathematical Model. The law control and limitation of Brushless DC Motor without mechanical load control is analyzed. Also a control strategy for Brushless DC Motor without mechanical load, which is composed of Piecewise-Discrete PID algorithm and Fuzzy Control Adjusting PID algorithm, has been bringing forward.Design the strong-current D.C. torque motor system based on DSP,design the control strategy for Brushless DC Motor without mechanical load and do experiments of CW/CCW testing, accelerated/decelerated testing, brake testing on it. The control result data indicates that, the strong-current D.C. torque motor system using the control strategy gives a good static, anti-disturbance and dynamic performance. The Piecewise-Discrete PID algorithm makes Maximum overshoot small, accommodation time rapid and avoids the system swing. The Fuzzy Control Adjusting PID algorithm design the parameters based on characteristics of Brushless DC Motor without mechanical and make the system safe, reliable.In the end, a Brushless DC Motor without mechanical load solutions based on FPGA has been bringing forward. Design the component and hardware control strategy using the SOPC tools. The simulation result indicates that, the digital-logic is clearness and the design is flexible. The Brushless DC Motor without mechanical load solutions based on FPGA makes the system design digitizing. |
