RU2528179C1 - INTEGRATED WINDING OF SYNCHRONOUS MACHINE FOR 2p=2, z=18 - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: invention enables to produce energy-efficient electrical machines, particularly high-performance, high-torque low-noise asynchronous motors. The disclosed integrated winding of an asynchronous machine with the number of pairs of poles 2p=2, with the number of grooves z=18 for the number of parallel braches a=1 is made with spacing y=1-10 and 6 has coils, wherein the number m_"з" of turns of odd coils and the number m_"тр" of turns of even coils satisfies the relationship $$m{}_{"тр"}/m{}_{"з"}=\sqrt{3}.$$

EFFECT: higher specific power of asynchronous machines while reducing material consumption, the level of noise and vibrations.

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Description

The invention relates to the electrical industry and allows the manufacture of energy-efficient electric machines, in particular high-torque, low-noise, asynchronous motors with increased operational characteristics.

It is known that the shape of the curve of the magnetic field of the winding in the working gap of the classical (standard) electric machines has a "non-smooth", stepwise character, different from the sine wave. This leads to modulation of the MDS and lower traction of the rotor of the machine, unwanted acoustic noise and vibration [1] which is a known disadvantage. Therefore, manufacturers tend to bring this curve closer to the sine wave in various ways [2, 3].

, 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 образует 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. Совмещение магнитных полей звезды и треугольника приближает к синусоиде форму кривой вращающегося магнитного поля в рабочем воздушном зазоре, за счет чего улучшаются энергетические характеристики машины, понижаются материалоемкость, уровень шумов и вибраций.The known principle of forming the windings of energy-efficient electric machines with six-phase so-called combined windings (RU 109934 U1, publ. 10/27/2011, and RU 113090 U1, publ. 27.01.2012). These include the commercially available high-torque asynchronous motors of the ADEM series (industrial sample, http://www.uralelectro.ru/), the combined non-combined stator winding of which is selected as a prototype of the proposed technical solution. This winding allows you to effectively suppress the highest odd harmonics of the MDS and consists 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 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 forms 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 terminals of their phases are interconnected and form points of their connection. The combination of the magnetic fields of the star and the triangle brings the shape of the curve of the rotating magnetic field in the working air gap closer to the sinusoid, due to which the energy characteristics of the machine are improved, the material consumption, the level of noise and vibration are reduced.

An unknown scheme of the combined combined winding of an electric machine with a step of y = 1-10, the number of pole pairs 2p = 2, the number of parallel branches a = 1 and the number of grooves z = 18, in which in two-layer grooves the number of turns is two times less than the number of turns in single layer grooves.

The problem to which the claimed solution is directed is the technical implementation of a combined combined winding previously not used in electrical engineering in a machine with a step y = 1-10, the number of pole pairs 2p = 2, the number of parallel branches a = 1, and the number of grooves z = 18 in order to obtain a technical result in the form of an increase in its specific power, a decrease in material consumption, the level of noise and vibration.

The specified technical result is achieved by the fact that the combined winding of an asynchronous machine with the number of pairs of poles 2p = 2, with the number of grooves z = 18 for the number of parallel branches a = 1, is made with a step y = 1-10 contains 6 coils, while the number m _s odd coil turns and the number m _{tr of} even coil turns satisfies the relation $$m{}_{tR}/m{}_s=\sqrt{3}.$$

The winding diagram in standard notation for a = 1 is shown in Fig. 1.

The novelty of the proposed technical solution is due to the fact that the combined winding circuit of an electric machine with a step of y = 1-10, the number of pairs of poles 2p = 2, the number of parallel branches a = 1, and the number of grooves z = 18 is combined, includes pole coils, which consist of two equal in number of sections of separate groups, while even groups are connected into a star / odd - into a triangle or, conversely, even groups - into a triangle, odd - into a star, and the conclusions of the same phases of a star and a triangle are connected to each other and form points of connection of phases sog asno explanatory essence of the claimed technical solution drawing in Figure 1. Unlike analogs and prototypes in these windings in two-layer grooves, the number of turns is two times less than the number of turns in a single-layer grooves.

According to the scientific, technical and patent literature, the authors are not aware of the claimed combination of features aimed at achieving the task for an electric machine with a combined combined winding with a pitch of y = 1-10, the number of pole pairs 2p = 2, the number of parallel branches a = 1 and the number grooves z = 18, and this solution does not follow clearly from the prior art.

The proposed solution is industrially applicable.

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 of Advanced Studies of the Ministry of Fuel and Energy of the Russian Federation and the Institute of Vibrations of the USA, vol. 9, St. Petersburg, 1999

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

Claims (1)

Combined asynchronous machine winding to the number of pairs of poles 2p = 2 with a number of grooves 18, z = number of parallel branches for a = 1 is made in increments y = 1-10 comprising 6 coils, with the number m _of coil turns of the odd and the number of turns even m _tr coils satisfies the ratio $$m{}_{tR}/m{}_s=\sqrt{3}.$$