Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1988-02-22
1989-03-07
Hall, Carl E.
Electrical generator or motor structure
Dynamoelectric
Rotary
29596, 296021, 29841, 310 43, 310 89, 310DIG6, 361395, 341112, H02K 1100, H02K 2366
Patent
active
048109177
ABSTRACT:
The method of forming a compact resolver/encoder assembly which is impervious to moisture, comprises several steps. First a number of electronic components of the resolver/encoder are mounted on a flexible printed circuit board. The circuit board is then folded into a generally cylindrical envelope and placed in a generally cylindrical container having a closed bottom end and an upper open end. The folded circuit board tens to unfold against the inner surface of the cylindrical wall of said container. Then a form made of stiff but flexible paperboard is inserted within the cylindrical envelope and tends to unfold to take on a tear drop cross section. Next a heat insulating potting compound is inserted into the generally annular space in the container between the form and the cylindrical wall of the container where the folded, printed circuit board is located. The potting compound is allowed to set around the circuit board with a generally cylindrical space defined within the form in the middle of the container. Finally, a stator and rotor assembly are mounted within the cylindrical space and fixed to the container.
REFERENCES:
patent: 3963919 (1976-06-01), Sells
patent: 4456844 (1984-06-01), Yamamoto et al.
patent: 4603238 (1986-07-01), Griswold et al.
patent: 4728834 (1988-03-01), Kumar et al.
Johnson Keith R.
Kumar Shalabh
Autotech Corporation
Hall Carl E.
Vigil Thomas R.
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