| BLDC is implemented in lots field because of its favourable performance.And BLDC control technique becomes better and better along with the new material and technics, the TI Inc, put out special-purpose of DSPs for Automation and Motor Control, and has made enormous success.Firstly the basic operation principle, composing parts, running characteristic and transfer function of BLDCM are discussed in this article. According to the demand of the system control, the DSP — TMS320LF2407A is chosen as the control chip of the drive motor. According to the characteristic of BLDCM and the function of the DSP , sensorless control solutions which are based on DSP technology are presented.Then, the hardware and software design of the system according to the preceding solutions are discussed in detailed .For the hardware part after a dissertation on the whole design the design of several chief circuits is expounded .For the software part, with the introduction of modulization design concept some procedure flow charts of main program subroutine are offered.At last the simulation results are given.
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