Lifting electromagnet

Details Lifting electromagnet Lifting electromagnet

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.

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