Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1978-04-14
1980-09-09
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 90, 310112, 310154, 310168, H02K 1742
Patent
active
042219850
ABSTRACT:
A dynamoelectric machine for generating an electric current having the frequency thereof proportional to the shaft speed of the machine. The generator is preferably of the permanent magnet type particularly suitable for use as a wheel speed indicator or tachometer-generator. The stator has an inner and outer tubular portion, with the inner portion disposed for limited radial movement with respect to the outer housing and having one end of the rotor journalled thereon for holding a substantially constant air gap at the rotary pole thereof. The limited movement of the inner stator portion is resisted by frictional forces created by the permanent magnet and by the axial bias of a thrust bearing. The remaining end of the rotor is journalled in a bearing registered in the outer stator housing. The machine gives magnetic saturation at the stator poles at 30% of rated speed and produces a strong signal output at low speeds.
REFERENCES:
patent: 2671179 (1954-03-01), Blanchard
patent: 2832908 (1958-04-01), Abbott
patent: 3445697 (1969-05-01), Costa
patent: 3486054 (1969-12-01), Livingston
patent: 3504208 (1970-02-01), Rivers
patent: 3736449 (1973-05-01), Honeywell
patent: 3790832 (1974-02-01), Patel
patent: 3960248 (1976-06-01), Tribe
patent: 4096624 (1978-06-01), Gray
Kuether Roger F.
Larson Gerald L.
Eaton Corporation
Johnston R. A.
McCloskey R. J.
Skudy R.
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