Dsp-based Direct Torque Control System Research And Design,

AC speed control technology is one of the most important progress in the 20th century, and it has taken up most parts of the drive-field.This paper makes the feasibility design and study of the DTC (Direct torque control) system based on analyzing some important parts , such as the arithmetic model of asynchronous motor in α -β coordinates, the choice of voltage vectors, and flux-linkages models, etc.The research work in this paper is described as follows:1 Analyzing of the DTC theory: Material about the development and theory of DTC, the composing of DTC-system are presented in this paper. Introducing a stator flux calculation method with hysteresis band exchange of two different models. Having vector subdivision in DTC system.2 Designing the hardware of the DTC system: The hardware circuit design is completed using TI'TMS320LF2407 and IPM (Intelligent Power Model).3 Designing the software of the DTC system: Main program and subprograms are compiled using C and assemble language to complete control arithmetic, including flux models, models switch, speed PI adjuster and CAN module, etc.