Siemens Aktiengesellschaft

Kraftwerk Union Aktiengesellschaft

Rudolf Von Musil

Franz Spirk

Peter Grunewald

Peter Jung

Norbert Didzun

Ingolf Schmidt

Gunter Kremser

Rainer Muller

Joachim Krutzfeldt

Wolfgang Schier

Ferdinand Stobbe

Process and device for quickly reducing pressure in an installation, in

A configuration, which may be part of a heavy-duty dynamoelectric machine, in particular a stator, being impregnated with a filler such as a cured epoxy resin, includes a ferromagnetic and electrically conductive carrier body having grooves formed therein defining groove walls, and winding elements disposed in the grooves. Each of the winding elements has an electrically highly conductive basic unit, an impregnatable insulating sleeve surrounding the basic unit, and an electrically weakly conductive, impregnatable protective layer enveloping the insulating sleeve. Impregnatable separating layers are each disposed between a respective one of the winding elements and at least one of the groove walls of a respective one of the grooves. The separating layers are substantially formed of laminated mica sheets resting flat between the winding element and the groove wall. A multiplicity of electrically weakly conductive bridges electrically connects the protective layer through the separating layer to the groove wall. The winding elements may be winding rods.

Impregnatable configuration of a carrier body and winding elements

An electric converter motor of synchronous design is used as a hoist by supplying two legs of the stator winding with DC current from a frequency converter to maintain the field during standstill. The converter is connected to the power network.

Synchronous electric converter motor

A multiplanar conductor bar for electric machines comprising subconductors superimposed radially in a number n of circumferentially mutually adjacent planes, n being a whole, even number between six and ten, inclusive, and transposed by at least 360.degree.. A total of two groups of two adjacent subconductor planes, respectively, are formed at upper and lower sides of the multiplanar conductor bar by exclusively mutual crossover of the semiconductors of the two adjacent planes. A total of n/2-1 groups of four adjacent subconductor planes, respectively, are formed at the upper and lower sides of the multiplanar conductor bar by exclusively mutual crossover of the subconductors of the respective four adjacent subconductor planes and exclusively in a transition between the respective outer and the respective inner planes of the four planes. The respective groups of four adjacent planes are mutually offset at the lower side with respect to the upper side by two subconductor planes. Each of the subconductors traverse all layer levels between two crossover points in each subconductor plane alternatingly in descending and ascending order in successive planes. The individual crossed-over subconductors of each of the subconductor planes are stacked so as to form a respective subconductor column, the subconductor columns being mutually telescoped and united into the multiplanar conductor bar.

Multiplanar conductor bar for electric machines, especially for

Stator of an electric machine having an air-gap winding with every respective second bar thereof being radially outwardly cranked in the end turn region thereof includes a laminated core subdivided radially into two concentric component laminated cores and defining therebetween a cylindrical joint, at least one of the component laminated cores being formed with axially extending slots at the cylindrical joint for relieving from magnetic tension the inner component core of the two concentric component cores.

Two part laminated stator for an electric machine with an air-gap winding

An excitation winding arrangement is provided for low-speed synchronous machines wherein the poles are configured without pole shoes and accommodate the excitation windings. The excitation winding arrangement includes coils of flat conductors which define the excitation windings. The flat conductors are wound so that their surfaces are parallel to the walls of the poles and the coils form a self-supporting component which can be improved by hardened turn insulation. These coils are secured only at the end-faces of the poles by a mounting arrangement. Effective cooling of the coils in the pole gap is thereby achieved.

Growing community of inventors

Berlin, Germany

Rudolf Von Musil