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US 4,066,941 AGranted
Motor drive control arrangements
AssigneeInternational Computers Limited
InventorAlan Foster
Life of this patent
Estimating the term…
Abstract
A motor drive system for driving a motor according to a predetermined motor speed curve in which a predetermined count of pulses of constant time increment is utilized to produce an output signal characteristic of an increment of motor movement. In addition the control signal is used to control the time interval between successive occurrences of the output signal in accordance with the motor speed curve.
Claims8
A motor drive control arranged to control the speed of a motor in accordance with a predetermined velocity variation curve including:
- a memory device including a plurality of addressable storage locations respectively containing different stored values relating to required increments of movement of the motor;
- a step counter operable to address the storage locations of the memory device, the location addressed being determined by the contents of the step counter;
- means operative to increment the step counter for each incremental movement of the motor to read out the values from the memory device relating respectively to the required increments of movement of the motor;
- and drive means responsive to the values read out from the memory device to supply drive current to the motor so as to cause the motor to move in accordance with the predetermined velocity variation curve.
1 more element
Dependencies are inferred from the claim text.