Electric salient-pole machine

Claim 2

In an electric salient-pole machine having a damper winding and an excitation winding made up of damper conductors and excitation conductors respectively, and an arrangement for directly cooling the windings with a fluid, the arrangement comprising fluid supply means for supplying the cooling fluid, damper passage means and excitation passage means formed in said damper conductors and said excitation conductors respectively for conducting the fluid therethrough, said damper passage means being serially connected to said excitation passage means, and the serial combination of said damper passage means and said excitation passage means being connected across said supply means so that the fluid flows first through said damper passage means.

Claim 3

The cooling arrangement of claim 1 wherein the cooling fluid is a liquid and wherein said damper passage means is hydraulically connected to said excitation passage means in series.

Claim 4

The cooling arrangement of claim 2 wherein each of the conductors is an annular elongated member, said damper passage means comprising a plurality of said damper conductors hydraulically connected in series, and said excitation passage means comprising a plurality of said excitation conductors hydraulically connected in series, said plurality of damper conductors being connected hydraulically in series with said plurality of excitation conductors, the serial combination of said plurality of damper conductors and said plurality of excitation conductors being connected across said supply means so that the cooling liquid flows first through said plurality of damper conductors.

Claim 5

The cooling arrangement of claim 3, said fluid supply means comprising a liquid supply hydruaulically connected to said plurality of damper conductors for supplying the cooling liquid to said serial combination, and a liquid receiver hydraulically connected to said plurality of excitation conductors for receiving the cooling liquid supplied to said serial combination.

Claim 6

The cooling arrangement of claim 4, said liquid receiver being a collecting conduit for receiving the cooling liquid from said plurality of excitation conductors and for directing the liquid away from the machine.

Claim 7

In an electric salient-pole machine having a plurality of salient poles, the cooling arrangement of claim 4, wherein each of the poles has respective pluralities of said damper conductors and said excitation conductors, the plurality of damper conductors on each pole being grouped into at least two damper sets of damper conductors, the conductors of each of said damper sets being connected hydraulically in series, and the plurality of excitation conductors on each pole likewise being grouped into at least two excitation sets of excitation conductors, the conductors of each said excitation sets being connected hydraulically in series, each of said damper sets being serially connected hydraulically with a corresponding one of said excitation sets on the same pole to form thereby at least two individual hydraulic series circuits per pole, said two cirCuits being hydraulically connected in parallel between said liquid supply and said liquid receiver.

Claim 8

The cooling arrangement of claim 6, the excitation conductors of both of said excitation sets being disposed one adjacent the other so that cooling liquid at respectively different temperatures flows through mutually adjacent conductors.

Claim 9

The cooling arrangement of claim 3, said plurality of damper conductors being grouped into two damper sets of damper conductors, the conductors of each of said damper sets being connected hydraulically in series, said plurality of excitation conductors being connected hydraulically in series with and between said two damper sets, the serial combination of said damper sets and said plurality of excitation conductors being connected across said supply means, whereby the cooling liquid flows first through one of said damper sets, then through said plurality of excitation conductors, and finally through the other set of said damper sets.

Claim 10

The cooling arrangement of claim 8, said plurality of excitation conductors being grouped into two excitation sets of excitation conductors, the conductors of each of said excitation sets being connected hydraulically in series, said damper sets and said excitation sets being connected in series alternately one after the other to form a composite hydraulic series circuit, said series circuit being connected across said supply means so that the cooling liquid flows first through one of said damper sets, then through one of said excitation sets, then through the other of said damper sets, and finally, through the other one of said excitation sets.

Claim 11

The cooling arrangement of claim 9, the excitation conductors of both of said excitation sets being disposed one adjacent the other so that cooling liquid at respectively different temperatures flows through mutually adjacent conductors.