Electricity: motive power systems – Linear-movement motors
Patent
1985-01-07
1988-03-22
Duggan, Donovan F.
Electricity: motive power systems
Linear-movement motors
310 12, 310 13, H02K 4100
Patent
active
047331437
ABSTRACT:
A linear DC motor adapted for driving a positioning table having a frame and a table displaceable in a linear direction has a toothed assembly affixed to one element thereof and an array of permanent magnets facing the toothed assembly mounted on the other element. Coils wound around the teeth of the toothed assembly and appropriately energized by DC produce a linear force which is effective to displace the table in a desired direction. When used with a position sensor and an appropriate control system, the table is controllable to a desired position. A set of brush members depending from the table contact a developed linear slip ring track for energizing the coils and for switching polarity of voltage to the coils at appropriate locations. In an embodiment where the coils are stationary on the frame and the magnets are disposed on the table, a power pickup arrangement movable with the brush members is incorporated into the brush and developed slip ring apparatus.
REFERENCES:
patent: 3136934 (1964-06-01), Henry-Baudot
patent: 4151447 (1979-04-01), von der Heide
patent: 4187453 (1980-02-01), Rough
patent: 4247793 (1981-01-01), Rough
patent: 4369383 (1983-01-01), Langley
patent: 4439698 (1984-03-01), Chen
patent: 4560911 (1985-12-01), Chitayat
"The Linear D.C. Motor Improves Control Flexibility" by J. J. Brough published in Electrical Review Nov. 8, 1974.
"Position Control of Linear D.C. Motors" by J. J. Brough published in Electrical Review vol. 199, No. 11, Sep. 17, 1976.
"D.C. Linear Motors for Elevator Door Operators" by P. L. Jones published in Elevator World May 1970.
"D.C. Linear Motors for Industrial Applications" by P. L. Jones published in Electrical Times Jul. 10, 1969.
"An Introduction to the Linear D.C. Motor" by J. J. Brough published in Electronics & Power Sep. 5, 1974.
Anorad Corporation
Duggan Donovan F.
Morrison Thomas R.
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