Abstract: A model-based disturbance suppression method is adopted for a high-precision, micro-feed permanent magnet linear AC synchronous motor drive system. Disturbances such as friction, cutting force, and load variations are suppressed. Simultaneously, an integral-ratio (IP) controller is designed for the speed loop to meet the system's requirement for fast command tracking and exhibits strong anti-disturbance capability. Simulation results show that the control method has fast response speed, strong anti-interference capability, and can effectively improve machining accuracy. Keywords: Linear motor; Speed ​​controller; Disturbance suppression. Because permanent magnet linear AC motors eliminate the influence of the mechanical transmission chain from rotary motion to linear motion in rotary motors, they are the best choice for actuators in high-precision, micro-feed servo systems. However, since the load is directly connected to the linear motor mover, load changes and external disturbances will directly affect the performance of the servo system. In servo systems, disturbances are the main factor causing a decline in system servo performance. Especially in CNC machine tools requiring micro-feed and precision machining, in order to improve the system's servo performance and achieve excellent working quality, this is crucial. "Disturbances must be suppressed." Traditional PI control cannot meet the requirements of high-performance linear direct-drive AC servo systems. This paper adopts an IP controller in the speed loop, which enables the system to quickly track commands while also having strong anti-disturbance capabilities. To effectively suppress disturbances, a model-based disturbance suppression method is introduced, using a compensator to compensate for disturbances present in the system. [b][align=center]For details, please click: Model-Based Disturbance Suppression Design for Linear Motors[/align][/b]