Electricity: motive power systems – Open-loop stepping motor control systems
Patent
1978-05-25
1982-03-23
Truhe, J. V.
Electricity: motive power systems
Open-loop stepping motor control systems
318701, 318810, 310 49R, H02P 146, H02P 536, H02K 3700
Patent
active
043215181
ABSTRACT:
A system for driving an inductor type synchronous motor for minute control thereof which includes an inductor type synchronous motor having a circuit for driving m phases of driving windings and first magnetic teeth. A second group of magnetic teeth is provided facing the first group of magnetic teeth. Apparatus is provided for feeding electric current from a DC power source to the driving windings of the respective phases. The driving winding for one phase intersects the flux of a partial set of first magnetic teeth or at least two magnetic teeth to provide a flux-interlink. A group of solid state switches are interposed between the source for producing the electric current and the driving windings of the respective phases. A distribution pattern generator generates patterns in response to a command signal and controls the on-off states of the solid-state switches with the noted patterns to thereby form the electric current into trigonometric-functional-patterns. The minute control characterized with an electrical resolution number R, per electrical angle 2.pi. (2.pi. being one fundamental cycle) of the apparatus for feeding electric current, is equal to or larger than 3m per electrical cycle. The minute control is thereby determined to be stepless.
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Mitsubishi Denki & Kabushiki Kaisha
Moose Richard M.
Truhe J. V.
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