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Closed loop power factor Dual PWM Frequency Control System Research

Author: ZhaoZuoYang
Tutor: LiZhengXi
School: North China University of
Course: Detection Technology and Automation
Keywords: Closed Loop Power Factor Dual PWM Rectified Inverter Dual DSP AC variable speed
CLC: TM921.51
Type: Master's thesis
Year: 2005
Downloads: 632
Quote: 5
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Abstract


This paper summarizes and study the current dual PWM inverter basic theory and common technology, based on the design and study of a DSP-based closed loop power factor rectifier, inverter rotor slip frequency control of dual PWM induction motor speed control systems. In the design and research work, based on the production of a power output of 4KW dual PWM motor system development platform, and completed the practical application of software design, debugging success of some software, the initial realization of the motor running. In the design and research process through computer simulation and prototype development of experimental research tools such as dual PWM inverter for each part of the system, from the working principle, mathematical model, design and implementation methods and other aspects of a more in-depth theoretical study. PWM rectifier system is the focus of this research project, this paper analyzes the PWM rectifier circuit topology, working principle and mathematical model, and present several common PWM rectifier control schemes are introduced and analyzed. On this basis, the proposed closed-loop power factor control ideas, and design closed-loop control of the power factor of the PWM rectifier scheme, namely in current tracking PWM Rectifier Based on the introduction of the power factor regulator, to achieve power factor PWM rectifier loop control. In this research program, the application of computer simulation technology, providing the power electronics using MATLAB toolbox Simulink simulation environment for a large number of simulation experiments. Experimental results show that the system reserves PWM rectifier current tracking fast response, harmonic, high reliability features, while improving the response characteristics of the power factor, power factor to achieve a real-time adjustment. MATLAB simulation tests verify the correctness and feasibility of the system. In the right side of the inverter frequency control system study, analysis and study of the induction motor speed control system, several control programs, while focusing on the PWM technique to AC Drive System, as well as dual-DSP-based Full digital control platform SPWM and SVPWM method. Based on slip frequency control system design, in a dual motor system development platform DSP system controller on the programming, debugging success of some software, completed the rotational speed of the motor current, voltage regulation feedback parameter tuning, the initial realization the motor running. More research is done in pairs of PWM inverter based on the theory and practice of innovation. Closed loop power factor control scheme for PWM rectifier has a certain reference value; dual PWM motor systems research and development platform for on this platform inverter speed control system research work for the future and lay a good foundation for further study.

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CLC: > Industrial Technology > Electrotechnical > Electrification,electrical energy application > Electric drive ( electric drive ) > Control system > Variable frequency control system
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