Study On Three Level Inverter Vector Control System Of The Induction Motor

At first, this thesis comprehensively describes the development future of power electronics techniques and the present development condition of multilevel inverter. It also simply compares three-level inverter with two-level inverter to embody the important significance of this thesis.Secondly, this thesis systemeticly analyses the inherent property of three-level inner vetors, explains the whole process of phase exchange and presents the basic method to resolve the neutral point balance problem;it presents two kinds of control algorithms to fulfill this system, detailedly introduces the concrete fulfillment process of each kind of algorithm and demonstrates the feasibility and validity of the corresponding algorithm with full and accurate data and diagrams;it presents relevant neutral-point-balance control scheme according to different algorithm and presents the concrete implement process.Finally, this thesis simulates the two kinds of algorithm and corresponding neutral-point-balance control scheme with MATLAB. On the base of detailed analysis about simulation results, it compares the main difference between the presented two kinds of algorithm.What is more, this thesis accomplishes all design and debugging of hardware circuit and chooses TMS320LF2812DSP as the main controller to complete system software.