RU2568646C1 - COMBINED WINDING FOR ELECTRIC MACHINE DESIGNED PER 2p=12, z=36 - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: combined winding for electric machine designed with number of pole pairs of 2p=12 and number of slots of z=36 for a number of parallel branches of a=1, 3 or 6 includes spatial combined composition of two three-phase windings, at that one winding is wye-connected, while the other one is delta-connected. Ratio of wye and delta turns is $$\sqrt{3}.$$

At that equal number of slots is assigned to each phase and shift between neighbouring poles of wye and delta is 0.5 of a slot.

EFFECT: improved operational characteristics of the electric machine.

4 dwg

Description

The invention relates to the electrical industry and allows the manufacture of energy-efficient electrical machines, in particular automotive synchronous generators with enhanced performance characteristics (SEC).

It is known that the shape of the curve of the magnetic field of the winding in the working gap of the classical (standard) asynchronous and synchronous electric machines has a "non-smooth", step-like character, different from the sinusoid. This leads to modulation of the magnetic driving force (MDS) and a decrease in the SEC of the machine, undesirable acoustic noise and vibration [1]. Therefore, manufacturers tend to bring this curve closer to the sine wave in various ways [2, 3].

The known principle of the formation of windings of energy-efficient high-torque electric machines with six-phase so-called combined windings (RU 109934 U1, publ. 10.27.2011, and EN 113090 U1, publ. 27.01.2012).

, при этом на каждую фазу приходится равное число пазов, катушки различных фаз уложены в разные пазы так, что результирующие векторы индукции магнитного потока каждой из двух соседних фаз образуют между собой угол в 30 эл. градусов, нечетные фазы соединены в звезду, а четные - в треугольник, или наоборот, а выводы их фаз соединены между собой и образуют точки их подключения к трехфазной сети.These windings can effectively suppress spurious higher odd harmonics of the MDS and consist of a spatially combined composition of two three-phase interdependent parts (windings), assembled one into a star, the other into a triangle, with a ratio of the number of turns of the triangle and the star equal to $$\sqrt{3}$$

while each phase has an equal number of grooves, the coils of different phases are stacked in different grooves so that the resulting magnetic flux induction vectors of each of the two adjacent phases form an angle of 30 el. degrees, the odd phases are connected into a star, and the even ones into a triangle, or vice versa, and the outputs of their phases are interconnected and form the points of their connection to a three-phase network.

The combination of the magnetic fields of the star and the triangle brings the curve shape of the rotating magnetic field in the working air gap closer to the sinusoid, which improves the SEC of the machine (RU 111723, publ. 12/20/2011, RU 132271, publ. 10.09.2013, analogues). As a prototype selected "Combined winding of an asynchronous machine for 2P = 2, z = 18" (RU 2528179, publ. 09/10/2014).

The scheme of the combined winding of an electric machine with the number of pole pairs 2p = 12, the number of parallel branches a = 1, 3 or 6 and the number of grooves z = 36 is unknown.

The problem to which the claimed solution is directed is the technical implementation of a combined winding previously not used in mechanical engineering in a machine with the number of pole pairs 2p = 12, the number of parallel branches a = 1, 3 or 6 and the number of grooves z = 36 in order to obtain the generator mode of the technical result in the form of an increase in the specific power and reliability by reducing the load on the rectifier and the relay-regulator when using an electric machine in a car.

, при этом на каждую фазу приходится равное число пазов, катушки различных фаз уложены в разные пазы так, что сдвиг между соседними полюсами звезды и треугольника составляет 0,5 паза.The technical result is achieved in that the combined winding of the machine with the number of pole pairs 2p = 12, with the number of grooves z = 36 for the number of parallel branches a = 1, 3 or 6 includes a spatially combined composition of two three-phase parts (windings) assembled one into a star, the other into a triangle, with the ratio of the number of turns of the triangle and the star equal to $$\sqrt{3}$$

while each phase has an equal number of grooves, the coils of different phases are stacked in different grooves so that the shift between the adjacent poles of the star and the triangle is 0.5 grooves.

Winding circuits in standard designations are shown in FIG. 1 (a = 6), FIG. 2 (a = 3) and FIG. 3 and 4 (a = 1).

The novelty of the claimed technical solution is due to the fact that the combined winding of an electric machine for 2p = 12, a = 1, 3 or 6 and z = 36 is characterized by a shift between the two adjacent poles of the star and the triangle, equal to 0.5 groove.

According to the scientific, technical and patent literature, the authors are not aware of the claimed claimed set of features aimed at achieving the task for an electric machine. And this solution does not follow with obviousness from the prior art.

The proposed technical solution is industrially applicable for both synchronous and asynchronous electrical machines.

Information sources

1. Design of electrical machines. Ed. I.P. Kopylova. M .: Energy, 1980.

2. A.V. Barkov, N.A. Barkova. Intelligent systems for monitoring and diagnosing vibration machines. Proceedings of the St. Petersburg Energy Institute for Advanced Studies of the Ministry of Fuel and Energy of the Russian Federation and the Institute of Vibrations of the USA, issue 9, St. Petersburg, 1999

3. A.V. Ivanov-Smolensky. Electric Machines, Volume 1, M .: Ed. House of MPEI, 2006

Claims (1)

Combined winding of an electric machine with the number of pairs of poles 2p = 12 and with the number of grooves z = 36 for the number of parallel branches a = 1, 3 or 6, which includes a spatially combined composition of two three-phase interdependent parts (windings) assembled in one star, the other into a triangle, with the ratio of the numbers of turns of the triangle and the star equal to $$\sqrt{3}$$

while each phase has an equal number of grooves, characterized in that the shift between adjacent poles of the star and the triangle is 0.5 grooves.

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