Method for the control of an electric machine and/or device for the control thereof
AssigneeSiemens Aktiengesellschaft
InventorsThomas Hoppe, Tibor Seres
Life of this patent
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Abstract
The invention relates to a method for the control of an electric machine (5), wherein a control unit (1) comprises a parameterisable speed control (26) and a parameterisable additional control (28). The electric machine (5) is provided in order to modify the position of a displaceable machine part (7,8). The position (29) of the displaceable machine part (7,8) is detected and at least one parameter (31) of the speed control (26) and/or at least one parameter (33) of the additional control (28) is modified according to the position (29) of the displaceable machine part (7,8).
Claims5
A method for controlling a linear motor having a primary movable machine part comprising windings and a secondary fixed machine part comprising permanent magnets, comprising the steps of:
- moving the movable machine part along a movement path which is partially covered;
- measuring a magnetic field produced by the permanent magnets at a position along the movement path;
- and
- setting a position-dependent parameter of a control unit controlling a speed or position of the movable machine part based on the measured magnetic field.
An apparatus for controlling a linear motor having a primary movable machine part comprising windings and a secondary fixed machine part comprising permanent magnets, said permanent magnets having a cover which modifies a magnetic field along a section of a movement path of the movable machine part comprising:
- a sensor for measuring the magnetic field along the movement path;
- a memory unit for storing position-dependent parameters derived from the measured magnetic field;
- and
- a control unit for controlling a speed or position of the movable machine part based on one or more of the position-dependent parameters stored in the memory unit.
Dependencies are inferred from the claim text.