Metal working – Method of mechanical manufacture – Electrical device making
Patent
1986-10-06
1989-07-11
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
29608, 310 42, 310 43, 310156, 310216, 2642722, H02K 1502
Patent
active
048458376
ABSTRACT:
A rotor assembly for a permanent magnet motor includes a set of laminatings forming a rotor body, each lamination having a first magnet slot therein. A generally rectangular permanent magnet is disposed in the magnet slot, the magnet slot of each lamination being shaped so as to receive the rectangular permanent magnet through all the skewed laminations with a minimum air gap. A method of making an assembly such as a rotor includes the steps of providing an assembly body made of ferromagnetic material defining at least one magnet slot therein. The slot is at least partially filled with a mixture of magnetizable particles in a binder. The mixture is compressed and then cured to bond the magnetizable particles together in the slot and the bonded particles are then magnetized in the slot to form a magnet in situ in the slot without an air gap.
REFERENCES:
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patent: 3564705 (1971-02-01), Cochardt
patent: 4255684 (1981-03-01), Mischler
patent: 4358696 (1982-11-01), Lin et al.
patent: 4434546 (1984-03-01), Hershberger
patent: 4469970 (1984-09-01), Neumann
patent: 4568846 (1986-02-01), Kapadia
patent: 4618792 (1986-10-01), Yates
Emerson Electric Co.
Hall Carl E.
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