Electromagnetic chuck with magnetizing/demagnetizing circuit

Details Electromagnetic chuck with magnetizing/demagnetizing circuit Electromagnetic chuck with magnetizing/demagnetizing circuit

1997-07-03

1999-11-23

Fleming, Fritz

Electricity: electrical systems and devices

Demagnetizing systems and processes

361145, 361149, H01F 1300

Patent

active

059911476

ABSTRACT:
An improved electromagnetic chuck which does not require a continuous direct current supply while being magnetized, including a main body defining a plurality of recesses and forming a cover, which includes a plurality of magnetically conductive portions and non-magnetically conductive portions alternately arranged, a plurality of magnetic units arranged within said plurality of recesses, and a magnetizing/demagnetizing circuit for magnetizing/demagnetizing said plurality of magnetic units, is provided. The magnetizing/demagnetizing circuit includes a magnetizing circuit, a demagnetizing circuit and an output circuit, by which a direct current is generated to magnetize the electromagnetic chuck, or a pair of positive and negative phase pulses with a gradually increased frequency is generated to quickly demagnetize the electromagnetic chuck.

REFERENCES:
patent: Re15884 (1924-08-01), Coradi
patent: 1339553 (1920-05-01), Dunbar
patent: 2348967 (1944-05-01), Duby
patent: 3111607 (1963-11-01), Storch
patent: 4370693 (1983-01-01), McDonald et al.
patent: 4399482 (1983-08-01), Inoue
patent: 4402032 (1983-08-01), Wilterdink
patent: 4462059 (1984-07-01), Yamagami et al.
patent: 4591943 (1986-05-01), Armond
patent: 4684112 (1987-08-01), Chernikov et al.
patent: 4847582 (1989-07-01), Cardone et al.
patent: 4956625 (1990-09-01), Cardone et al.
patent: 5047742 (1991-09-01), Hsu
patent: 5267119 (1993-11-01), Armond et al.

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