The Design And Implementation Of Control System With DSP For Brushless DC Motor

With the world's increasing demands for energy and environment,electric propulsion and electric traction system have been more and more widely applied in every walk of life. Due to DC motor inherent limitation that machine commutation and brush results in stand-alone capability's limit low reliability, big noises, people manage to explore more quiet, high efficient and reliability, big stand-alone capability propulsion motor. These years along with the development of power-electronics technique and micro-control technique, permanent magnetic brushless DC motor is characterized by small volume, light weight,high efficiency, low noises, big stand-alone capability and reliability appeared and matured. So it is hopeful to become new generation electric propulsion motor.The great development of digital signals processors and hardware chips help to realize permanent magnetic brushless DC motor's fast and reliable control. Texas Instruments offers a new DSP controller family, specifically designed for the needs of digital motor control. In a single chip solution, this device combines a fixed-point DSP core with micro-controller peripherals.Architecture and function of DSP chip TMS320LF2407 was briefly introduced in this paper. Hardware design of BLDC motor control system including the basic expand of TMS320LF2407, drive circuit and current-detecting circuit. In addition, it uses the fuzzy-PID arithmetic. The result demonstrates that the DSP technique let the system become more precise and reliable and it simplify the system framework.