SU884039A1 - Three-phase pole-switchable winding - Google Patents

Description

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The invention relates to electrical engineering and can be used to create pole-switched windings.

A winding is known at 10–4–2 poles containing 24 coil groups by counter-switching in phase with axial coil groups, with winding at ten poles containing two parallel branches, at Four poles also two parallel branches, and at two poles - four parallel branches p1

A disadvantage of the known winding is that at four poles the electromotive forces of parallel branches are not balanced and equalizing currents flow inside the windings.

The closest to the proposed one is a winding of 10-4-2 poles, also containing 24 coil groups with opposite connection between them.

(81-7) with (81-1), () with (), (81Ч-8) with (81 + 14), (81 + 14) with (8 + P),

(8Г + 11) with (8i + 5), (8i + 5) with (81 +2) and (8f + 2) with () coil groups with leads from (81-7), (81-4) and from the connection points (8I.-1) with (81 + 8), (81 + 14) with (8G + 11), (81 + 5) with (81 + 2) coil groups 2.

A disadvantage of the known winding is a large number of leads to the switch.

The purpose of the invention is to reduce

10 the number of switching pins. This goal is achieved by the fact that in the beginning phase (81-7) and (8f-4) of the coil groups are combined, the beginnings (81 + 5) of the coil groups of all three phases form a zero point.

FIG. I shows the unfolded winding scheme; in fig. 2- internal connection diagram; in fig. 3shema inclusion of windings in the network.

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The winding (fig. 1) contains 24 coil groups with alternating numbers of coils in rpjmnax 2-2-1-1-2-2-1-1-, etc. Winding contains total

12 switching pins - 2, C1, 4С2, YUSZ, etc.

To ensure the balancing of the electromotive forces of parallel branches at 2 poles and to reduce the amplitude of the lower harmonic of the magnetizing force at 10 poles, the number of turns in the coil groups from one coil is assumed to be 75% of the number of turns in the coils of large coil groups. The coil groups (Fig. 2) in phases are connected oppositely in the sequence (81 + 2), (81-4), (8i-7), (), (), (8 + 14), (8i + n), ( ) ..

The conclusions are taken from the combined principles (8i-7) from (81-4), (81-1) from (8i + 8), (8i + 14) from (81 + 11) and from the beginnings (81 + 2) and (81 + 5) coil groups, with the conclusions from the beginnings (81 + 5) of the coil groups of all three phases of the image zero point.-.

The three Y-YY / YYYV three-phase interface circuits use the motor with the proposed winding to the fullest extent.

The calculated value of induction in the air gap B, / V. / B “I (0.94) 0.99.

 4- jl

When the voltage is applied to the terminals 10С1, 10С2, ЮСЗ, we get 10 poles (Fig. 3). Phase-V mapping.

When summing up. water 4ci, 4С2, 4СЗ and combining the conclusions 10С1, 10С2, ЮСЗ we get 4 poles. The interfacing scheme of the phases is YY.

When the voltage is applied to the terminals 2C1, 2C2, 2S3, we get the G: poles. The phase mapping is YYYY. .

Claims (2)

1. USSR author's certificate number 515210, cl. H 02 K 3/28, 1976. 2. USSR Author's Certificate for Application No. 2342635/07, cl. H 02 K 3/28, 1976. 1 D 3 5 b 7 5 5 / О JMZ f3 No. / 5 / b J7 W V202P2252425262128 29: 503J 32333 3S3 € III I O2C2 OW L L L L L L L / / BUT M 62С1 6 n 6 2a Fig .. 2