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Research on Air Gap Flux Oriented Vector Control Techniques of Synchronous Motor

Author: ChenGouYi
Tutor: LinZuo
School: Huazhong University of Science and Technology
Course: Power Electronics and Power Drives
Keywords: Synchronous motor Vector control Magnetic Field Orientation Controller design Flux Observer
CLC: TM341
Type: Master's thesis
Year: 2011
Downloads: 51
Quote: 0
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Abstract


Synchronous motor speed control system is widely used in high-power electricity transmission occasions. High-performance synchronous motor speed control system, not only can achieve the industrial automation, improve production efficiency, but also for the speed regulation is also of great significance. Electrically excited synchronous motor speed control system as the research object, a more in-depth analysis and study of the air-gap magnetic field orientation control system design and flux observer. Firstly, based on the principle of vector control and coordinate transformation tools to analyze the basic principle of the synchronous motor air gap field oriented control system; established the basic relationship of the synchronous motor, and derive the mathematical model of the p.u. system dq the shafting and MT shafting ; given the overall block diagram of the vector control, provide the necessary foundation for control system design. Using engineering best method designed stator current regulator, speed regulator, the excitation current regulator and the air-gap flux regulator parameters. Focus on the control of the MT-axis stator current discourse: analysis of the impact of the current regulator parameters of the system dynamic and steady-state performance; open-loop bode diagram analysis pointed out that the PI regulator motor parameters change has strong robustness ; discussion back EMF disturbances current loop control performance. The performance of the control system design through simulation study. Used air-gap flux observer current model and voltage model based on flux observer design based on the current model reference adaptive flux observer program. A detailed analysis of the parameters of PI controller design method based on the current model reference adaptive flux observer; create complex vector synchronous motor flux observer model, frequency domain analysis of the design of the observer theoretically performance evaluation; validated through simulation. In addition, the paper also simple derivation of the flux observer digital algorithm. Main AC-DC-AC inverter and DC chopper circuit topology design of the Synchronous Motor experimental device. Stator current loop control performance through the experiments, the speed control performance closed-loop control of the air-gap flux performance and air-gap flux observer performance study, the results show that the experimental device has good speed performance.

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