Armature construction for eliminating armature reaction in elect

Details Armature construction for eliminating armature reaction in elect Armature construction for eliminating armature reaction in elect

1980-06-24

1987-12-29

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310212, H02K 110

Patent

active

047163291

ABSTRACT:
To eliminate armature or rotor reaction or leakage flux (leakage reactance) in an electric rotating machine, a short-circuit coil winding is wound on and through the rotor or an armature core of the machine. The short-circuit coil winding is wound at a right angle to the main coil to exclude any intervention. Due to placement of a non-magnetic material in the armature core, the leakage flux which flows in the non-magnetic material is reduced and the flux of the stator and the rotor flows separately along both sides to the inner part of the armature or rotor ring core. Due to the non-magnetic material, the flux which occurs due to the current of the transformer m.m.f. of this short-circuit ring coil extends substantially into the airgap, therefore to abate the effect of armature reaction flux in the airgap.

REFERENCES:
patent: 1717289 (1929-06-01), Weiler
patent: 2296776 (1942-09-01), Douglas
patent: 3891876 (1975-06-01), Herr et al.

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