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Permanent magnet track linear motor drives are used in numerous industrial manufacturing processes covering a wide range of material handling and conveyor applications. A traditional solution is a permanent magnet linear motor (PMLM) in which the stationary part consists of permanent magnets and the moving part of the armature. To further reduce the initial costs of such a permanent magnet track linear...
Tooth belt drives with directly connected permanent magnet servo motors are mechanically very flexible systems, and the resonances of the system change significantly as function of cart position and load. This paper addresses issues in identification of a linear tooth belt-drive with limited stroke. Particular attention is paid to detecting the changes in the system dynamics. This is achieved by using...
A sensorless positioning method for a non-salient permanent magnet linear synchronous motor is presented in this paper. The control method combines an open-loop current angle rotation method to the back-EMF estimator method. The open-loop current angle rotation method is used at low velocities and the back-EMF method at higher velocities. The position accuracy is defined by the open-loop current angle...
Different assembly, printing and cutting applications demand often fully synchronized movement of multiple actuators. The linear tooth belt drive offers an inexpensive and fast solution for linear movement applications. In this paper the cross-coupled controller is implemented and tested with biaxial linear tooth belt drive system for motion synchronization. The elastic tooth belt set uncertainty...
Motion control applications often demand fast operation times and high accuracy at the same time. Finding the optimal solution between these demands can be sometimes difficult. A linear tooth belt drive offers inexpensive, fast, and relatively accurate solution for motion control demands. However, if the best possible accuracy and highest speeds must be reached, the control designer should be well...
In motion control, high servomotor over loadings are required to maximize the acceleration and deceleration rates and thereby the process throughput. Typically the pull-out torques of the induction servomotors vary in between 3...5 times the rated value, while with standard industrial motors, the ratio is typically between 1.6...3. As the stator copper losses are proportional to the stator current...
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