| The topic of this thesis comes from a previously research item of national defence: The Technology of Magnetic Suspending Flywheels . Permanent Magnetic Brushless DC Motor (BLDCM) is selected as drive motor of the Magnetic Suspending Flywheels system . The drive system is required to work in momentum wheel and counteractive wheel mode and realize high precision speed regulating . In this thesis, the Brushless DC Motor control system of Magnetic Suspending Flywheels based on DSP technology is researched .Firstly, the basic operation principle, composing parts, running characteristic and transfer function of BLDCM are discussed . According to the demand of the flywheel's drive system, the DSP -TMS320LF2407A is chosen as the control chip of the drive motor. According to the characteristic of BLDCM and the function of the chip, sensored and sensoeless control solutions which are based on DSP technology are presented respectively, and their corresponding simulation is done as while . 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 and several problems of software realization are investigated . At last, the testing phenomenon when the control system running is observed and the experimental results are analyzed .The results of experiment show that the control system of BLDCM based on DSP can operate under two modes: momentum wheel mode and counteractive wheel mode, the system has control precision higher than 0.1% and the overshoot less than 3% when the rotate speed of motor is higher than lOOOrpm, which satisfy the demand of magnetic suspending flywheels . These virtues make the system has promising applications on spacecraft.
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