RAPID FEED CONTROL FOR AN ELECTRIC STEP MOTOR

An electric step motor is energized from a variable frequency pulse generator such that feed pulses of a gradually increasing frequency are applied to the step motor during the starting thereof and feed pulses of a gradually decreasing frequency are applied to the step motor during a reduction in th...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KUBO M,JA, TAKAHASHI Y,JA
Format:	Patent
Sprache:	eng
Schlagworte:	CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY FUNCTIONAL ELEMENTS OF SUCH SYSTEMS GENERATION MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PHYSICS REGULATING
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Beschreibung
Zusammenfassung:	An electric step motor is energized from a variable frequency pulse generator such that feed pulses of a gradually increasing frequency are applied to the step motor during the starting thereof and feed pulses of a gradually decreasing frequency are applied to the step motor during a reduction in the speed thereof. A frequency divider is provided for obtaining a value corresponding to one half or N/2 of a total feed of pulses N. A register is also provided for storing pulses Nm which correspond to the number of feed pulses present during an interval for controlling the step motor from a maximum speed to a minimum one. A digital comparator is provided for comparing the content of the register with the output of the frequency divider and in accordance therewith controls the variable frequency pulse generator and hence provides a speed reduction in the electric step motor.