Design And Application Of High-performance Permanent Magnet Synchronous Servo System

Permanent magnet synchronous motor has a simple structure, small size, high power density characteristics, composed by a permanent magnet synchronous motor servo system has excellent control performance in CNC machine tools, household appliances, robotics and aerospace and other fields are widely used. Permanent magnet synchronous servo technology development and application of national industrial modernization has become the measure an important indicator of the level of development, research to achieve high performance permanent magnet synchronous servo system products design has a very important practical significance.Paper introduces the AC motor dqO coordinate transformation theory, a permanent magnet synchronous motor in the d-q coordinate system of mathematical models and equivalent circuit model, the four kinds of permanent magnet synchronous motor current vector control strategies commonly used in-depth analysis. First, create a servo system speed loop and current loop transfer function model, based on engineering design law theory, the entire set can make optimal dynamic performance of the servo system speed, current loop optimal PI parameters.For surface mount permanent magnet synchronous motors, current vector control strategies and PI regulator to achieve a double-loop servo motor space vector control. First, create a servo system speed loop and current loop transfer function model, based on engineering design law theory, the entire set can make optimal dynamic performance of the servo system speed, current loop optimal PI parameters. Based on SVPWM modulation algorithm, the control voltage three-phase bridge inverter circuit and the servo system power conversion of mechanical energy, and the inverter voltage to obtain a higher utilization. Papers using2500wire photoelectric incremental encoder to detect the rotor position information, on three different methods as well as its speed velocity relative error in-depth analysis, and gives improved operational performance measures motor speed, the motor minimum speed of up to0.1r/min. Papers in the double-loop control, based on the proportional regulator realized through servo position control, position control accuracy of0.036°. Papers were used once directed method and the iterative method to achieve the initial orientation of the motor.Thesis uses DSP chip TMS320F2808controller developed a prototype750W permanent magnet synchronous servo system, servo system consists of three subsystems:the human-computer interaction systems, control systems and power systems, completed its software and hardware design work. Achieve a position control, speed control and torque control of basic functions. Eventually, through a performance test to verify the servo system with high speed performance, low operating performance, strong load capacity and a wide speed range.Thesis750W permanent magnet synchronous servo direct drive system used in5000N-m volume control servo system, the completion of electro-hydraulic system electronic control part of software and hardware design. Electro-hydraulic servo system is a position control system, the paper position loop parameters using adaptive methods to effectively improve the response speed electro-hydraulic valve, valve position control accuracy of0.2°. Performance test results show that the design of permanent magnet synchronous motor servo system runs5000N· m electro-hydraulic system reliable, fast, high control accuracy.