Low-cost bobbin-wound stator construction for small, single-phas

Details Low-cost bobbin-wound stator construction for small, single-phas Low-cost bobbin-wound stator construction for small, single-phas

1996-12-23

1998-07-14

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310216, 310217, 310 40MM, 310166, H02K 1710

Patent

active

057809518

ABSTRACT:
A bobbin-wound stator for small single-phase AC motors that surmounts magnetic compromises required by previous implementations is fabricated of stacked two-piece laminations and a split winding bobbin fitted about a first one of the lamination piece stacks that permits bobbin winding of a single coil about the pole neck of a magnetic yoke having pole shoes magnetically coupled to each other, but not in direct contact with each other, at a predetermined clearance distance chosen to balance rotor-to-armature flux linkage, armature inductance, and reluctance torque. The second lamination piece stack is pressed into the first lamination piece stack supporting the bobbin-wound coil to complete the stator. The stator is usable in several single-phase AC motors, including electronically commutated motors, chaotically-starting permanent magnet motors, and shaded-pole induction motors.

REFERENCES:
patent: 4095130 (1978-06-01), Oshima et al.
patent: 4473766 (1984-09-01), Obergfell et al.
patent: 4835839 (1989-06-01), Forbes et al.
R. Thees, "Small Electric Motors", Philips Technical Review, vol. 28, 1965, No. 4/5/6/, pp. 143-144.
H. Schemmann, "Stability of Small Single-Phase Synchronous Motors", Philips Technical Review 33, 235-243, 1973, No. 8/9, pp. 235-243.

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