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Dsp-based Voltage Source Vector Control Inverter Research And Development

Posted on:2003-02-05Degree:MasterType:Thesis
Country:ChinaCandidate:H D ZhaoFull Text:PDF
GTID:2208360065456059Subject:Mechanical and electrical engineering
Abstract/Summary:PDF Full Text Request
Space Vector Control scheme has been widely studied and used during recent years due to its novel strategy. In this thesis, a Voltage Vector Control Inverter based on DSP is studied and developed.Space Vector Control according as AC induction motor two-axis theory speed separates the stator current into two components. One is the torque component; The other is the flux component. A structure similar a DC machine structure where torque and field can be controlled independently is given. In this thesis, a slid frequency vector control system and a speed sensorless vector control system based on reactive power are investigated and analyzed.Explain the idea and theory of Space Vector Modulation and Overmodulation. The implementation of SVM and the realization scheme are given.Switching losses analysis indicates that the switching losses can be extremely reduced with different load qualities by choosing proper phase-voltage modulation method. The method of minimum switching losses SVM is investigated. The modulation functions of a quasi-optimum method and a two-phase modulation method are given.The theoretical analysis and result of simulation indicate that the two-phase modulation reduces the switching losses 50% relative to the quasi-optimum and the Space Vector Modulation and Overmodulation can generate higher voltages with low total harmonic distortion.The experimental results indicate that the scheme of software and hardware is successful. The advantages of compact structure and clear thinking lay the foundation of developing better performance vector control system.
Keywords/Search Tags:DSP, inverter, vector control, space vector modulation, slid frequency, reactive power, modulation function, switching losses
PDF Full Text Request
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