Electricity: motive power systems – Limitation of motor load – current – torque or force
Patent
1985-06-10
1987-02-10
Shoop, Jr., William M.
Electricity: motive power systems
Limitation of motor load, current, torque or force
318254, 318138, 310 68R, H02K 2910
Patent
active
046425390
ABSTRACT:
A bidirectional DC motor having a rotatable permanent magnet rotor structure within a ring core bearing helical windings is arranged to provide smoothly continuous torque over very wide excursion angles, which may be continuous if desired. Signals as to actual angular position of the rotor are utilized to generate timing signals for switching a driving current in proper polarity between different windings such that the extent and force of interaction fields remain substantially constant. The windings occupy different arc segments on the ring core and are energized such that all rotor tip regions are uniformly acted upon as the rotor moves from one arc segment to another.
REFERENCES:
patent: 2823545 (1958-02-01), Bodge
patent: 3344325 (1967-09-01), Sklaroff
patent: 3482126 (1969-12-01), Bradley
patent: 3501655 (1970-03-01), Siefert
patent: 3564370 (1971-02-01), Catherin
patent: 4373148 (1983-02-01), Gutz
patent: 4547713 (1985-10-01), Langley et al.
Northern Magnetics, Inc.
Ro Bentsu
Shoop Jr. William M.
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