Rotor of synchronous nonsalient-pole electric machine

FIELD: electricity.

SUBSTANCE: rotor, in particular, of a turbogenerator comprises a winding made of coils (1) from current-conducting strands with turns covering a pole and laid into slots (2), at the same time, according to the invention, each coil (1) has concentric arrangement of turns placed in one layer in all slots (2), related to the pole division of the rotor. This invention is especially relevant for synchronous nonsalient-pole electric machines with air cooling.

EFFECT: higher capacity of a synchronous nonsalient-pole electric machine without variation of its rotor dimensions.

2 cl, 3 dwg

 

The proposed solution relates to the field of electrical engineering and for the design of the rotor of the synchronous neravnodushnogo generator, in particular a turbo-generator with large power.

Known rotor pavlopoulou electrical machines [1] with the winding, the coils of which are arranged concentrically on the pole. The installation in the slots start with a coil of larger size, and then fixed on the barrel of the rotor adjacent to the reel teeth. Next turn set coil smaller and fix them like the first. The coils are connected, and under the lower turn of the last coil appears "false" level.

For the prototype accepted design of the rotor of the synchronous pavlopoulou electrical machines - turbo-generator [2], placed in the grooves of the barrel of the rotor winding coil type. Coils coils are arranged in the column and occupy two slots one slot division. Coils are concentric about the axis of the large tooth and interconnected, while the design also has a "wrong" turn.

A common disadvantage of known solutions is that powerful machines cross-section of the coil is large, and the presence of "false" loop under the lower turn of the last coil leads to a significant decrease of the cross section of the ventilation channel between the rotor shaft and the lower is her surface coils. This is due to the deterioration of the cooling of the rotor of the electric machine by reducing the cooling flow entering the active part of the rotor. This reduces the unit power of the electric machine. This problem is most acute in relation to machines with air-cooled high power.

The task of the technical solution is to increase the power of the electric machine without changing the dimensions of the rotor.

The problem is solved due to the fact that the rotor of the synchronous pavlopoulou electrical machine containing the winding, made in the form of coils of conductive wires from the coils, covering the pole and laid in the grooves, each coil has a concentric arrangement of coils placed in a single layer in the grooves relating to the pole division. The conductors in the cross-section may have an elongated shape and are oriented side larger along the radial axis of the groove.

The prior art is not revealed placement of coils each coil in a single layer in all the slots of the same pole division.

The technical solution is illustrated in the drawings, in which figure 1 presents a fragment of the rotor of the turbogenerator with accommodation on the first pole coil winding, figure 2 is a fragment of the rotor with subsequent placement of the coils in figure 3 - fragment And 2.

The rotor (see IG) turbine generator includes a coil, consisting of coils 1. Each coil 1 consists of conductors (conductive wires)laid in one layer in all the grooves 2, are related to the pole division of the rotor. The conductor is oriented party larger along the radial axis of the groove. The number of polevikov each coil 1 is equal to the number of grooves pole division. The coils of the coil 1 are concentric about the axis of the large tooth 3. Each subsequent coil 1 is located on the previous coil 1 in a single layer in all the slots 2 (see figure 2). Between the shaft 4 of the rotor and the bottom surface of the first coil 1 has an axial air channel (in the drawing position is not marked, the arrow shows the direction of coolant flow). The connection of the coils 2 between them carried out by soldering using an intermediate conductive element 5 (Fig 3).

No acting axial vent "false" loop facilitates the efficient ventilation of the rotor of the electric machine, which is especially important for machines of large capacity.

Technical efficiency of the invention consists in the possibility of increasing the power of the electric machine without increasing its size.

Sources of information

1. Patent RU 2248658, firm NGO Les, NC 15/09, NC 3/51, priority dated 22.08.2003, publication 20.03.2005.

2. Patent GB 2470107, General Electric company, H02K 1/32, NC 9/00, à priori the et from 05.05.2009, publication 10.11.2010.

1. The rotor of the synchronous pavlopoulou electrical machine containing the winding, made in the form of coils of conductive wires from the coils, covering the pole and laid in the grooves, wherein each coil has a concentric arrangement of coils placed in a single layer in all the slots that are related to the pole division.

2. The rotor of the synchronous pavlopoulou electric machine according to claim 1, characterized in that the conductors have a cross-section elongated shape and are oriented side larger along the radial axis of the groove.



 

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8 dwg

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10 cl, 5 dwg

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3 dwg

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2 cl, 2 dwg

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EFFECT: enhanced manufacturability.

3 cl, 2 dwg

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