SCHRITTMOTOR

A single phase bipolar stepping motor is described wherein the rotor is capable of bidirectional rotation. The rotor is so dimensioned that a combination of its moment of inertia J, its volume V and the number of pole pairs p satisfy the relation J/(Vxp1,4)>/=5x10-3 kg/m. Such a rotor will reliab...

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Bibliographic Details
Main Author TU,DR.. XUAN,MAI
Format Patent
LanguageGerman
Published 11.09.1980
Subjects
CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS
CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
ELECTROMECHANICAL CLOCKS OR WATCHES
GENERATION
HOROLOGY
PHYSICS
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Summary:A single phase bipolar stepping motor is described wherein the rotor is capable of bidirectional rotation. The rotor is so dimensioned that a combination of its moment of inertia J, its volume V and the number of pole pairs p satisfy the relation J/(Vxp1,4)>/=5x10-3 kg/m. Such a rotor will reliably step in the sense opposite to the preferred sense when the motor winding receives a first pulse of short duration followed by a second pulse of longer duration the polarity of which is inverted relative to that of the first pulse. The invention may find application to timepieces having hours and minutes hands.
Bibliography:Application Number: DE19803007848