Research on the operation control for rope-less hoist system driven by Permanent Magnet Linear Synchronous Motor

The rope-less hoist system driven by Permanent Magnet Linear Synchronous Motor (PMLSM) is a revolutionary new technology for high-rise buildings, but also requiring new technology for propulsion, safety and control. Based on the analyzing of rope-less elevator driven by PMLSM, the article proposes the operation control system, designs the power supply system and safety control system. Linear motor drives load directly without any mechanical transfer links. On the basis of theory of direct torque control in asynchronous motor, principle of Direct Thrust Force Control (DTFC) for PMLSM is analyzed in this paper. Simulations with SIMULINK of MATLAB have been given to demonstrate validity of the control system. The obtained results are expected to be usable for extra-rise buildings.