Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1983-03-30
1985-10-01
Eisenzopf, Reinhard J.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
336136, H01F 708
Patent
active
045449856
ABSTRACT:
A single or composite lifting electromagnet has several cores whose poles can attract round, elongated or otherwise configurated ferromagnetic objects. The cores are surrounded by and/or flank discrete sensors in the form of Hall generators or induction coils which are provided in addition to exciting coils for the cores. The sensors are disposed centrally of or mirror symmetrically around the center of the electromagnet, and the purpose of the sensors is to generate signals in response to changes of the electromagnetic field to thereby facilitate automatic guidance of the electromagnet toward an optimum position with reference to an object which is to be lifted and transported, e.g., to the treating station of a machine tool.
REFERENCES:
patent: 3413580 (1968-11-01), Gibas
patent: 4319109 (1982-03-01), Bowles
patent: 4324185 (1982-04-01), Vinson
patent: 4422041 (1983-12-01), Lienau
patent: 4427940 (1984-01-01), Hirama et al.
Metz Rudi
Scholl Herbert
Eisenzopf Reinhard J.
EMAG Maschinenfabrik GmbH
Kontler Peter K.
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