SU1037378A1 - A.c. machine combination stator winding - Google Patents

Description

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Fig. 1 The invention relates to the field of windings of combined electric machines and can be used, for example, in single-machine frequency and phase converters, in motors with a rolling rotor, etc. The combined windings of alternating current machines made in the form of parallel branches of one machine are known. popusnosti p. , each of which consists of coils shifted in space and having the findings of averages, ow. The first beginnings || of the other polarity of the Angle to the axis of the coils of the same branch is (p, –rd) radians, and the number of turns in the coils is proportional to the sine of the shift angle relative to the branch axis. The disadvantages of such windings are design complexity and manufacturing, large losses from equalization currents in the branches. Three-phase-phase combined windings are also known, containing 12 distributed coil groups connected in two parallel branches, the beginnings of which form the phase clamps for (polarity p, and the ends are connected to two For additional terminals for polarity p, in one branch of which the first and counter-included eighth groups are connected in series, in the other branch - the second and counter-seventh groups, and the numbers of the phase groups alternate at intervals of four groups, where PJ is 1 and Ro 6 2 Disadvantages such a winding is limited application. The closest to the invention according to the technical essence and the achieved result is a combined winding containing 12 distributed coil groups connected in phases into two stars, the beginnings of which form three phases The clamps are for polarity p, and the ends are connected to two additional terminals for polarity p2, in the first phase of one star, to which are connected in series the first and opposite twelve groups, in the first phase of the other pole star and the seventh is turned on, and the numbers of the phase groups alternate at intervals of four groups, where p 5 and p, j 6 C. There are drawbacks, it has a low winding ratio and a poor shape of the NS for popping p, which increases the differential dissipation of the winding. The purpose of the invention is to improve the winding parameters by increasing the number of coils. . This goal is achieved by the fact that the combined stator winding of an alternating current machine, made of uniformly distributed coil groups, connected in phases into two stars, the beginnings of which form three-phase clamps for polarity p, and the ends connected to two additional terminals for polarity p 2, contains eighteen coil groups and in the first phase of one star the first and opposite third and seventeenth groups are connected in series, in the third phase of the other star is the eighth, the second and eighth and twelve tsata, and the phase number of groups are interleaved at intervals of 6 groups, and the step of coils is equal to the polarity pole pitch P2. FIG. 1 shows a winding circuit; in fig. 2 - star, EMF; in fig. 3, the EMF winding diagram for the P 5 winding (FIG. 1) is single-layer in 36 slots with a coil pitch of 3 and contains 18 distributed coils numbered from 1 to 18. In one branch of the first phase, the coils of the first and opposite third and seventeen are connected in series and in - the branches of the eighth, counter-ten and twelve. The beginning of the branches form a C1 phase clamp for polarity p. 5, and the ends are connected to two additional terminals 01 and O2 for pole position 6. The phases are also similar; C2, C3, the coil numbers of which alternate at intervals of six coils. The upper row of arrows in FIG. 1 shows the direction of the current arrows when powering the winding through terminals C1, C2, Sz by three-phase current, whence it is seen that p 5j the lower row of arrows shows the direction of currents when powering the winding through terminals 01 and 02 by single-phase current, from where it is seen that P2 6. On FIG. The 3 EMF vectors are assigned the coil numbers and from the EMF diagram constructed for polarity p 5, it is clear that this field on the 01 and 02 terminals does not divert the EMF. In addition, a field with a polarity of p2. 6 does not lead to the EMF on the terminals C1, C2, .S3, which is easily shown from the construction of the EMF diagram of the winding for polarity P; 6

The winding has a high winding coefficient for polarity p 5 Kp 0.827 (CPU winding by the known device KQ (j 0,892)

form of crisis NA for popusnosti P | 5, which reduces its differential distance and improves the parameters.

17 P

/ i 8 FIG. 2

F1Ag.

Claims (1)

57) COMBINED STATOR WINDING OF A VARIABLE MACHINE A CURRENT made of uniformly distributed coil groups connected in phases of two stars, the beginnings of which form three-phase clamps for the pole, and the ends are connected to two additional leads for the sake of pole _r , characterized in that, in order to improve the parameters, the winding contains - eighteen, coil groups and in the first phase of one star, the first and counterclockwise third and seventeenth groups are connected in series, in the first phase of another star is the eighth, the tenth and twelfth are counterclockwise, with the numbers n · other phases are alternated at intervals of six groups of coils and pole pitch equal fission tslya pole p where = 5 and p = ₂ 6.