Abstract
The direct-drive PMLSM control system for high-performance positioning systems requires the performance of high dynamic response and strong robustness. The high dynamic PMLSM servo system is satisfied using a digital deadbeat current controller and proposed sliding mode control (SMC). Considering the influence of hardware sampling time delay and inverter delay, the deadbeat current controller can adjust the current loop in 2 PWM cycles and enable the high-bandwidth current control. And based on the proposed SMC, the PMLSM position servo system can provide high dynamic performance and strong robust characteristics. The proposed SMC employs a uniformly asymptotic convergence of saturation function to eliminate the steady-state error and improve the accuracy of servo system. The results of simulation show that the direct-drive PMLSM control system with deadbeat current control and SMC method can acquire fast dynamic response and great robustness.
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