Based On The Number Of Dsp's High-performance Brushless Dc Motor Control System

Brushless Direct Current Motor is a new type motor which developed on base of Direct Current Motor due to the advancement of the power electronics , motor control technology and microprocessor . Because this type of motor not only have the merit of the AC induction motor for simple structure, reliable operation and easy upholding but also have the merit of the Direct Current Motor for high performance, no lose and easy control. The research and application of it has draw lots of attention of the researchers in this field in resent years.The design use Brushless Direct Current Motor as an object, completing the design of high performance control system of BLDC based on DSP. The system has the characteristic of digital motor control. Via assembled DSP and analogue circuit accomplishing the digital control of motor. Experimentation indicates the system fulfill the demand of veracity and real time for the high performance servo control system of BLDCThe hardware of the system use the TMS320LF2407 as the microprocessor; the converters is made of the IGBT to form the bridge circuit and the drive circuit is made of the optocouple. In order to avoid the direct shoot of the bridge the design also consider the protection of it and the protection circuit is offered in the design. Many EMC method is adopted throughout the design of hardware.The C program is offered here . The structure of the software of the whole design is made of the main program, subprogram and interrupt program . Main program finish the initiation of the chip and variable of the program. The interrupt program and subprogram finished the tasks of A/D transform, the scan of the keyboard , digital PI control, the converting of the phase and PWM generating edc .