And next year it hopes to complete the construction of a cold-rollingmill near Vietnam's ho Chi Minh City, and an automotive steel-sheet plant in Mexico to supply General Motors and Hyundai Motor.
The feed drive system of a precision cold ring rollingmill adopts AC servo motor and mechanical transmission, rather than conventional electro-hydraulic actuator.
采用交流伺服电机和机械驱动进给系统的冷轧环机,其进给伺服控制系统的设计需要一个新的工艺动力学模型。
3
The application of preview PWM control in speed regulation system of rollingmill with single main motor drive is introduced. The scheme of hardware is presented at first.