Generator excitation system with rotating electromagnetic energy connector and internal winding power source

Claim 2

An excitation system for a dynamoelectric machine having a rotating field winding and electromagnetic stator core with a multi-phase set of main armature windings comprising: an electromagnetic energy converter having a secondary winding adapted to rotate with said field winding and also having a stationary primary winding, said secondary winding being wound to provide a multiple of the number of pole-pairs on the field winding, rotating rectifier means adapted to receive AC excitation power from said secondary winding and connected to supply rectified DC excitation power to said field winding, a multi-phase internal winding disposed in close proximity with said electromagnetic stator core and having a first winding portion adapted to link with the synchronous flux produced by said field winding to provide a potential-responsive power source and a second winding portion adapted to link with the flux produced by said main armature winding so as to provide a current-responsive power source, and AC regulator means connected to receive power from said first and second portions of said internal winding and furnishing a regulated compound power source to said energy converter primary.

Claim 3

The combination according to claim 1, wherein said first winding portion comprises a plurality of conductors disposed contiguous to the air gap of said dynamoelectric machine.

Claim 4

The combination according to claim 2, wherein said second winding portion comprises a plurality of coils disposed adjacent said main armature winding and arranged to link with the cross-slot leakage flux of said main winding, each phase of the first and second windings being connected in series.

Claim 5

The combination according to claim 2, wherein each phase of said first winding portion has a reactor coil connected in series therewith, wherein said second winding portion is disposed on the core of an internal transformer arranged to provide flux linkage with the internal leads from said main armature winding, said each phase of first and second winding portions being connected in parallel.

Claim 6

The combination according to claim 1, wherein said AC regulator means is a stationary thyristor-controlled device, whereby said excitation system has fast response.

Claim 7

An excitation system for a dynamoelectric machine having a rotating field winding and electromagnetic stator core with a multiphase set of main armature windings thereon, comprising: a rotating transformer having a secondary winding disposed to rotate with the generator rotor and having a number of pole-pairs which are a multiple of those in the field winding and having a stationary primary winding adapted to provide flux linkage with said secondary winding, rectifier means connected to receive AC excitation power from said rotating secondary winding and connected to supply DC excitation power to said field winding, an excitation transformer internal to said dynamoelectric machine having a primary winding comprised of the internal leads from said main generator armature winding, an internal multi-phase winding each phase having a first circuit comprising a first winding portion disposed contiguous to the air gap to link with the rotating synchronous flux from said generator field winding and being connected in series with a reactor coil, and a second circuit comprising a second winding portion disposed on said internal transformer and linking with a phase lead of the dynamoelectric machine armature winding, said first and second circuit being connected in parallel for each phase, and AC regulator means connected to receive power from said internal winding phases and supply regulated power to the rotating transformer primary.

Claim 8

An excitation system for a dynamoelectric machine having a rotating field winding and electromagnetic stator core with a multiphase set of main armature windings thereon, comprising: a rotating transformer having a secondary winding disposed to rotate with the generator rotor and having a number of pole-pairs which are a multiple of those in the field winding and having a stationary primary winding adapted to provide flux linkage with said secondary winding, rectifier means connected to receive AC excitation power from said rotating secondary winding and connected to supply DC excitation power to said field winding, an excitation transformer internal to said dynamoelectric machine having a primary winding comprised of the internal leads from said main generator armature winding, an internal multi-phase winding each phase having a first circuit comprising a first winding portion disposed contiguous to the air gap to link with the rotating synchronous flux from said generator field winding and being connected in series with a reactor coil, and a second circuit comprising a second winding portion disposed on said internal transformer and linking with a phase lead of the dynamoelectric machine armature winding, said first and second circuit being connected in parallel for each phase, and AC regulator means connected to receive power from said internal winding phases and supply regulated power to the rotating transformer primary.