Rotor for permanent magnet excited synchronous motor

Details Rotor for permanent magnet excited synchronous motor Rotor for permanent magnet excited synchronous motor

1981-12-24

1984-09-04

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310162, 310216, 310261, H02K 2112

Patent

active

044699700

ABSTRACT:
A permanent magnet rotor is made of a lamination stack having parts formed of a material of high permeability surrounding a shaft and extending radially outward with respect to the shaft, separated by interpolar regions of low magnetic permeability. A plurality of magnets are also included. These components are mechanically contained by the conductors of a starter cage. At least one strength lamination comprised of a magnetic material is stacked with the lamination stack and has an area which is coextensive with the areas of the rotor components. The strength lamination has interpolar bridge portions with cross-sectional areas sufficiently small to minimize interpolar flux leakage. The use of strength laminations periodically interspersed within the lamination stack greatly increases rotor strength without greatly increasing the total flux leakage in the rotor.

REFERENCES:
patent: 2139748 (1938-12-01), Harrell
patent: 2242008 (1941-05-01), Leader
patent: 2944171 (1960-07-01), Alger
patent: 3956650 (1976-05-01), Field
patent: 4127786 (1978-11-01), Volkrodt
patent: 4139790 (1979-02-01), Steen
patent: 4362959 (1982-12-01), Bartheld

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