Research On PMSM-based Synchronous Control Strategy And Algorithm For Shaftless Transmission

Shaftless driven synchronization control technology is a burgeoning transmission control technology, in recent years, is developing rapidly with computer control technology, power electronics and servo control technology, and has replaced the traditional mechanical gear transmission gradually in many industrial synchronization areas. As energy-saving motors, the permanent magnet synchronous servo motor (PMSM) has many excellent performances, such as simple structure, high control precision, fast response and strong overload. So Shaftless driven control based PMSM is becoming a research hotspot.This paper studies a variety of different control strategies of vector control system, mathematical model of PMSM motor in different coordinate systems is established by coordinate transformation, principles and calculation methods of Space Vector Modulation (SVPWM) is analyzed. PMSM Modular modeling thinking, PMSM vector control system is divided into several coordinate parts, including motor body module, sub-module conversion module, SVPWM module and parameter detection module, to establish the overall simulation model of double closed loop vector control system. Parameters on the current loop PI controller, speed loop PID controller are optimized.And by tuning the interference parameters, uniaxial PMSM servo system has good tracking accuracy and robustness.Several synchronous control strategy and algorithm in Shaftless drive system are studied, including the main command synchronization control, master-slave synchronization control, cross-coupling error control and synchronization coupled synchronization control. And these synchronization control simulation system are established in Matlab/Simulink to analyze and compare its control performance on control structure, strengths and weaknesses, and application fields. Finally, the improved synchronization strategies and algorithms based on Fuzzy PID compensation are proposed, and used in the simulation experiment of offshore platform elevator control system to control three legs lifting, as a result, achieving the desired synchronization control effect.