Motor control device and corresponding control method
AssigneeSiemens Aktiengesellschaft
InventorRoland Finkler
Life of this patent
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Abstract
The aim of the invention is to provide a speed control method for reducing current ripple and speed ripple at constant dynamics behavior while reducing the hardware required to a minimum. For this purpose, a control signal, especially a speed deviation (ev) is divided up into at least two signal portions (evhi and evlo). Every one of the at least two signal portions (evhi and evlo) is processed in a different manner. The low-order portion (evlo) can be smoothed by means of a low-pass filter (F). In an adder (Sum6) mounted downstream thereof the differently processed signal portions are then added up for further control.
Claims14
A motor control device, comprising:
- a control component adapted to provide a control signal;
- a signal dividing device adapted to divide the control signal into at least two signal portions, one of the control signal portions being a higher value signal portion and the other one of the control signal portions being a lower value signal portion;
- at least one signal processing device adapted to process each of the at least two control signal portions in different ways;
- and
- an adder device adapted to add together the differently processed control signal portions before further processing.
A method for controlling a motor, comprising the steps of:
- providing a control signal;
- dividing the control signal into at least two control signal portions, one of the control signal portions having a higher value signal portion and another one of the control signal portions having a lower value signal portion;
- processing each of the at least two control signal portions in different ways;
- and
- adding the differently processed control signal portions together before further processing.
Dependencies are inferred from the claim text.