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Research and Design of the Drive Control System of AC PMSM for Servo Press

Author: LiangJianJun
Tutor: RuanFeng
School: South China University of Technology
Course: Mechanical Manufacturing and Automation
Keywords: Servo Press low speed and high torque PMSM PI regulator control of sliding mode variable structure CORDIC
CLC: TM341
Type: Master's thesis
Year: 2011
Downloads: 79
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Abstract


Servo press directly driven by motor, as advanced forming equipment, is a product which integrates mechanical manufacturing technology, computer control technology and control technology of motor drive, is an important development direction of forging equipment. The first servo motor driven metal forming press appeared until the late 20th century. The reasons of the late coming of the servo motor driven press is that metal forming processes necessitate high power low speed and high torque motors and its drive control technology ,which were realizes after the powerful magnets were developed in the 1980s. And the type of motor and its drive control technology in China is relatively backward now.The paper is financially supported by the Major Science and Technology Special Project of Guangdong Province development and industrialization of high-power servo system key common technology for machinery and equipment. The drive control system of high -power, low speed and high torque permanent magnet synchronous motor (PMSM) are designed in this paper.The main research contents as follows:Firstly, the paper compares and analyzes the development of control system of servo press and the research situation at home and abroad. The reasons of the late coming of the servo motor driven press are in conclusion, and then the research situation of the motor drive technology are discussed, AC PMSM is selected as a driven motor for servo press.Secondly, the theory of vector transformation in vector control is deduced. The mathematical model of PMSM based on the d-q system is established, the aim to decoupling the stator current is achieved. And then id = 0 current control method based on SVPWM is analyzed, the mathematical model of vector control of PMSM based id = 0 is built and simulated in MATLAB/SIMULINK, the simulation results show that: the control method is suitable for drive control of high torque, low speed AC PMSM.Thirdly, the current loop and velocity loop regulators of vector control of PMSM based id = 0 are designed. All regulator of the drive system are analyzed in detail, the IP controller of the current loop and velocity loop are designed in Engineering design methods. To compare variable structure control and IP control, the variable structure speed control loop regulator is established and simulated in MATLAB/ SIMULINK, the simulation results show that: variable structure control of velocity loop is provided with excellent speed response and robustness.Fourthly, the calculation module of cosine based on CORDIC algorithm is designed and the applications of CORDIC algorithm in the control system of PMSM based SVPWM is given. The development trends of drive control system of PMSM based FPGA and the applications of CORDIC algorithm in vector coordinate transformation are analyzed. and then the CORDIC principle, the solutions and the error of CORDIC algorithm, the hardware implementation of CORDIC algorithm are noted. Finally, the circumference of the cosine based CORDIC algorithm is realized using Verilog HDL language, circuit waveforms are test and analyzed through Quartusâ…ˇdevice testing platform.Fifthly, the hardware and software test platform of drive control system for PMSM is built combining with theoretical analysis. The debugging experimental for drive control system for PMSM adopting a classification debugging ideas, the results show that: the drive control system of PMSM is provided with excellent characteristics: fast switching of speed, reversing within the rated speed meet the need of the servo press: high power, low speed and high torque of the driving characteristics.

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