Small diameter brushless direct current linear motor and method

Details Small diameter brushless direct current linear motor and method Small diameter brushless direct current linear motor and method

1991-08-29

1993-01-12

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Linear

310 12, 310 23, H02K 4102

Patent

active

051793067

ABSTRACT:
A new and improved linear motor and method of using it for producing a sufficient reciprocating thrusting action to enable well fluids be pumped through the production tubing of a well to the ground surface. The linear motor includes a mover and a stator, said stator including a set of coils for producing a series of electromagnetic field extending at least partially in an axial direction when energized with an electric current and a stator core defining a plurality of spaced-apart transversely disposed coil receiving slots and an annular axially extending mover receiving bore. The mover includes an elongated member mounted telescopically reciprocatively within the mover receiving bore and a plurality of permanent magnets interleaved with low reluctance spacers for helping to reduce core flux density in order to improve overall motor performance.

REFERENCES:
patent: 4210831 (1980-07-01), Hurst
patent: 4215283 (1980-07-01), Hinds
patent: 4508984 (1985-04-01), Guedj et al.
patent: 4810914 (1989-03-01), Kardis et al.
patent: 5049046 (1991-09-01), Escue et al.

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