Research Of Voltage Type Driven According To Stator Flux Oriented Vector Control

Asynchronous motor is characterized by higher efficiency and better operating characteristics, approaches to constant speed operation from no-load to full load. In most industrial and agricultural production, it can satisfy the mechanical transmission requirements, so it has been widely used. There are a variety of speed regulation method for asynchronous motor, and vector control is one of those speed regulation methods with high dynamic performance and is applied more mature. The traditional vector control, which uses current output control type inverter and rotor flux oriented, has been widely used, but there is still a prominent problem that rotor induction motor parameters are more sensitive to environmental changes and can not achieve the effect of control theory.Firstly, a development of alternating current speed regulation is introduced, the basic principle and research method of vector control is expounded, the important research value of improvement of traditional vector control method is illustrated. Secondly, through theoretical derivation and comparative analysis of six kinds of the existing vector control schemes, there is a conclusion that these three methods that voltage type inverter according to stator flux orientation and current output control type inverter according to stator and air gap flux orientation do not contain rotor parameters in their feedback loop, with high system robustness. A simulation is operated in Matlab/Simulink that further validates the conclusion.Considering to difficulty of the system implementation and control effect, the voltage output control type inverter according to stator flux oriented is chosen for experimental research. First, the closed-loop control system is designed, then doing the discretization of the system model and simulation, seting up the experimental system hardware circuit, and adopting DSP TMS320F2812 of TI company software development board to write the vector control algorithm, realizing the control requirements of the system.