Electricity: motive power systems – Linear-movement motors
Patent
1985-05-14
1987-02-03
Duggan, Donovan F.
Electricity: motive power systems
Linear-movement motors
310 13, 310 27, H02K 4100
Patent
active
046410651
ABSTRACT:
A moving coil type linear motor comprises a rail of generally U-shaped cross section, permanent magnets of flat plate-shape and magnetized in the direction of thickness and provided on an inner side of the rails with varied polarities of magnetic poles next to each other. A pair of coils whose length is 1.5 times that of the magnetic pole and has a space of 0.5 times the length of the magnetic pole in the center thereof, are disposed opposingly with the permanent magnets and travel along the permanent magnets within the rail. Brushes are provided with the respective coils, and a feeder pattern arranged on an inner side of the rail, feeds electric power to the coils through the brushes, only when respective active coil parts of the coils are fully in the magnetic flux of the same direction. The linear motor also comprises sensing means for detecting signals regarding the traveling of the coils, and controlling means for controlling the travel of the coils on the ground of the signals from the sensing means.
REFERENCES:
patent: 3452259 (1969-06-01), Shtrikmau et al.
patent: 3619673 (1971-11-01), Helms
patent: 3917987 (1975-11-01), Inoue
patent: 4151447 (1979-04-01), von der Heide
patent: 4260914 (1981-04-01), Hertrich
patent: 4318038 (1982-03-01), Munehiro
patent: 4369383 (1983-01-01), Langley
patent: 4529906 (1985-07-01), McMahon
patent: 4560911 (1985-12-01), Chitayat
Kawai Katsuhiro
Matsuyama Noboru
Nagasawa Yoshiaki
Onoyama Toshiaki
Sakagami Shigeru
Duggan Donovan F.
Toyota Shatai Kabushiki Kaisha
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