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Research on Matrix Converter Fed Induction Motor Vector Control System

Author: LeLiMin
Tutor: LinZuo
School: Huazhong University of Science and Technology
Course: Power Electronics and Power Drives
Keywords: Matrix Converter Vector control Decoupling of the current loop Controller design Rotor flux observer
CLC: TM346
Type: Master's thesis
Year: 2011
Downloads: 26
Quote: 0
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Abstract


Matrix converter has a very high power density , excellent input and output characteristics , and energy can be two-way flow naturally , very suitable for ships , vehicles , aerospace and other stringent requirements on device size, weight , harmonic . Matrix converter for vector control system of induction motor , vector control and the advantages of the matrix converter can be combined to achieve high-performance speed control . Firstly, the matrix converter control strategy , including space vector modulation strategy based on the the transitional voltage range two-step commutation strategy introduced ; then derived a mathematical model of the induction motor , rotor flux oriented dual closed loop the basic principle of vector control system of induction motor vector control block diagram of the control system of the matrix converter powered . Secondly, no-load and short-circuit the experimental determination of the precise parameters of the induction motor ; derived based on the mathematical model of induction motor vector control system using root locus design method and frequency response method to design the current loop regulator , magnetic link regulator and speed loop regulator parameters , focusing on analysis of stator current loop feedback decoupling control strategy that feedback decoupling has better dynamic decoupling characteristics ; established in Matlab / Simulink environment induction Motor Vector Control simulation model , simulation feedback decoupling superior to the stator current loop feedforward decoupling control , the vector control strategy effectiveness and system performance . Induction motor rotor flux observer , a voltage - current hybrid model , the closed - loop flux observer is designed , analyzed changes in the sensitivity of the model rotor resistance parameters as well as the ability to inhibit the DC bias signal ; on this basis , the equation of state based on the induction motor speed identification method , focusing on analysis of the problem of the choice of the digital realization of speed identification cycle , and the effectiveness of the method is verified by experiment . Finally, hardware platform and software design of the control system of induction motor vector control system , and a large number of experiments carried out in the experimental platform to verify the effectiveness of this controller design and dynamic , steady-state performance of the speed control system .

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CLC: > Industrial Technology > Electrotechnical > Motor > AC motor > Induction motor
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