SU1684868A1 - Three-phase two-pole machine - Google Patents

Description

one

(21) 4759728/07

(22) 11/20/89

(46) 10/15/91. Bul №38

(71) Stakhanov Branch of Kommunarsk Mining and Metallurgical Institute

(72) V.D.Lushchik and V.N.Asanbaev

(53) 621.313.333.625.2 (088.8)

(56) Petrov G.N., Ivano-Smolensky A.V., Abramov A.I. High-voltage hydrogenerators 110-220 kV: Reports of scientific-technical. Conference on the results of the scientific. Works 1968-1969, the subsection of Electrical machines. - M .. 1969.

USSR author's certificate N; 289481, cl. H 62 K 17/00, 1971.

USSR Author's Certificate N: 964875, cl. H 02 K 17/12, 1982.

(54) THREE-PHASE 2P-POLES MACHINE

(57) The invention relates to electrical engineering, namely to electric machines of alternating current, and can be applied to asynchronous motors and synchronous high-voltage hydrogenerators. In a three-phase 2p-pole machine, the number of claw-shaped teeth is 9p with numbers from 1 to 9p, one coil group of each phase of one pair of poles consists of three coils located on teeth 1,2,3 with a ratio of turns of coils 1: 3: 1 The second coil group of the same pair of poles consists of two coils located on teeth 6 and 7 with a ratio of the numbers of turns of coils of 2: 2; under the following pairs of poles the coil groups are made in the same way; . 3 il.

Yo

; 23CH56T89

With about.

About 00

00

Ltd

The invention relates to electric machines of alternating current and can be applied to asynchronous motors and synchronous high-voltage hydroheaters.

The purpose of the invention is to reduce the consumption of copper wire, reduce losses in it and increase efficiency.

FIG. 1 shows a three-phase 2p-pole machine with claw teeth, longitudinal and transverse cuts; in fig. 2 is a diagram of a stator winding located on claw-shaped teeth; in fig. 3 shows the layout of the phase windings.

The stator of a trap phase 2p-pole machine consists of rma 1, which is a ring wound from electrical steel tape, and claw teeth 2, the horizontal part of which carries winding 3. Under the claw teeth, free from windings, there is a rotor 4. Case should be non-magnetic, such as aluminum. The number of clawed teeth is 9p, where p is the number of pairs of poles, with numbers from 1 to 9p.

Phase windings are shifted relative to each other by 120 al. and each consists of 2p coil groups. The reel groups are spaced apart by 200 e.grad. and are interconnected in succession. Coils in coil groups are connected in series according to.

The coil group of phase A, located under one pole, consists of three coils placed on teeth 1, 2, 3, and has a ratio of the number of turns of 1: 3: 1, i.e. the coils on teeth 1 and 3 have the same number of turns Wi L / h, and the coil on tooth 2 has three times the number of turns: L / 2 3Wi. The second coil group of phase A, located under the other pole, consists of two coils placed on teeth 6 and 7, and has a ratio of the numbers of turns 2: 2, i.e. We W7 2Wi.

Phases B and C are shifted relative to phase A by 3 and 6 teeth, respectively. Under the next pair of poles, the coil groups of all phases are performed in a similar way.

The proposed winding according to the MDS it creates is equivalent to a two-layer winding with the number of slots per pole and phase q 1.5 and

shortening ft y / gg.

Due to the reduction in the number of claw teeth by 1.33 times in comparison with the prototype, the winding coefficient for the main harmonic increases by 30% and the consumption is reduced by the same amount

copper wire. The use of the proposed design of the stator and three-phase 2p-pole winding in asynchronous motors and synchronous hydrogenerators

leads to savings in copper wire consumption compared with serial designs, since the magnetic flux density penetrating the coils of the proposed winding is 3-4 times higher than

flow in serial designs. Since the winding on 9p teeth has a fractional number of slots per pole and phase q 1.5, the shape of the MDS curve created by this winding has a sinusoidal shape with a low content

higher spatial harmonics (amplitudes of the 5th and 7th harmonics are 34 and 110 times smaller than the primary, respectively), and the EMF of the tine harmonics is practically zero.

The proposed winding is a transformer-type winding, it is easy to manufacture, has mechanical and dielectric strength, which increases the reliability of the machine, is maintainable in

operating conditions.

The proposed stator design can be used not only in asynchronous, but also in high-voltage synchronous motors.

Claims (1)

Invention Formula Three-phase 2p-pole machine with a stator containing axially located claw-shaped teeth covered by phase winding coils, made in the form of packages, the ends of which form a stator bore on one side and are closed on the other side annular romom, phase windings consisting of 2p coil groups connected in series with each other, coils in coil groups are connected in series according to 5 with that in order to reduce copper wire consumption and increase efficiency, the number of clawed teeth is 9p sec Numbers 1-9p, one coil group of each phase of one pair of poles consists of three coils located on teeth 1, 2, 3 with a ratio of the numbers of turns of coils 1: 3: 1, the second coil group of the same pair of poles consists of two coils, dix on the teeth 6 and 7, with a ratio the numbers of turns of the coils 2: 2, under the following pairs of poles, the coil groups are made in a similar way, the other two phases are shifted relative to the first phase by 3 and 6 teeth, respectively. V-v t Mtf)