| The brushless DC motor control system is a novel speed-variable system. It offers excellent characteristics of operation, control and economy, and shows great developing potentiality. Furthermore, our country has rich rare-earth resources, and manufacture of rare-earth magnet steels has already reach international standards. It has strategic significance that the competitive power of our country's mechanical and electrical products will be enhanced in international markets, if making full benefit of and giving full play to our advantages in this field, and developing rare-earth permanent-magnet motors to form a series of products of BLDCM. In view of above-mentioned reasons, this thesis makes a detailed study on the control technology and methods to BLDCM. Texas Instruments offers a new DSP controller family referenced TMS320-LF2407A, which is specifically designed for the needs of digital motor control. In a single chip application, this device combines a fixed point DSP core with micro-controller peripherals. This chip is able to perform sophisticated control schemes. On the basis of the summary for the development and application of permanent magnet brushless DC motor speed-variable system, this thesis introduces a control system, which uses DSP to control the commutation and speed of BLDCM .The basic structure, operational principle and design method of this system are set forth in this thesis. The thought of hardware design and software programming is introduced as well. At last, the experimental results are presented. |
