Design And Realization Of AC Timing System Based On DSP And SVPWM

With the development of industrial automatization, people require higher capability to control system of electromotor. Advanced control theoretics forth develop, such as VC and DTC, microprocessor and controller are renovated, especially the appearance of DSP make them to become practice. But when people seek capability and cost, practicality and safety, they will find that ripe timing technology of frequency conversion is their primarily choose. Appearance of IPM and SVPWM improve the control capability of electromotor largely, and traditional timing technology of frequency conversion is pledged in industrial control of the world specially the developing country. Therefore, at the time of science and electro-apparatus changing with each passing day, how to imbibe and apply them achieve electromotor timing, and how to send them more practicality, safety, saving cost are worth paying attention and study in practical application.This paper namely aim at the problem and use powerful DSP, intellectualized IPM, advanced SVPWM to realize frequency conversion control of asynchronous electromotor. It introduce structure compose, design process, theoretics gist and performance guarantee of hardware flat roof based on DSP particularly. Analyzing the principle of SVPWM, control arithmetic of PWM and fixed-point operation of program realization. Handling PID and intellectualized control technology separately to realize closed loop system of speed, and the control capability is validated on the DSP flat roof. Finally, giving a kind of novel control technology from considering cost--- the control technology of many motors based on single DSP, and as the case of single DSP to control double asynchronous electromotor, narrating the design process of entire system; validating it is feasible by experiment, and providing the perfect resolve scheme to applicable occasion of sensitive cost and more motors.All hardware circuits and program compiling based on TMS320LF2407A. The circuits of data collection, speed sensor, control board of double motor based on single DSP, safeguard circuit in hardware pass through practical solder and debug. The program of SVPWM, speed closed loop and double motor control in software adopt C and assemble language fixed format, using CCS(C2000) translate and editor to progress debug and validate practically on DSP control flat roof. Experiment proving, exceeding adjust can less than 12%, steady error is 1.26%, risetime do not excess 6.5s of control system of closed loop; The control system of double motor based on single DSP can realize control freely in150r/min～1400r/min and 300r/min～2750r/min of the first motor and the second motor.