The Design Of Universal Developing Platform For Motor Control

With the increasing demands for the motor control technology, common MCU can't satisfy the control demands. However, the development of DSP technology can strongly support the implementation of advanced control theory and complex control algorithm. But in the development of motor control based on DSP, there are such many deficiencies as low efficiency and more needs for professional knowledge.Therefore, based on TMS320F2812 DSP and the toolbox Embedded Target for TI C2000 DSP in Matlab7.0, a design scheme of universal developing platform for motor control is proposed, which can greatly improve the developing efficiency of the motor control. The platform is designed with TMS320F2812 as its core and realizes PWM signal trigger with EPM7128. The three-phase full-bridge circuit is constructed with IR2130. Moreover, by introducing the design method of DSP software based on the platform, a simple example for the application of the PWM module is given and the feasibility of the design scheme for platform software is verified.Considering the demands of the performance index for high precision speed source, by analyzing the principle, mathematical model and vector graphic of rare earth permanent magnetic synchronous motor (PMSM), the strategy of closed-loop control of power angle in VVVF of PMSM is proposed. In the system, the power angle is detected by HALL position sensor and the power angle closed-loop controller is designed with the method of PID fuzzy self-tuning. Thus the system not only has a more rapid response speed, but also has smaller over-regulating and better static properties. In addition, the key technology included in the system is discussed in detail.The experiment shows that the high precision speed source has good speed precision and the demands of the performance index are reached. Under the power angle closed-loop control, the resistance capacity against load disturbance is improved and the problem of out-of-step is efficiently solved. In the steadily running mode, the operating current is remarkably decreased and the operating efficiency is increased. Moreover, the high precision speed source is successfully debugged in the platform, which verifies the correctness and the reliability of the platform.The platform which has both functions of teaching and product developing,...