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Double-Y-shift 30-degree 6-phase rectifying winding of fractional slot

A technology of rectifying windings and fractional slots, which is applied to the shape/style/structure of winding conductors to achieve the effects of small ripple coefficient, good DC power quality, and low harmonic content.

Active Publication Date: 2009-12-02
TELLHOW SCI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since 48 slots and 28 poles constitute 3 phases, the number of slots per pole and phase is a true fraction, that is q = z 2 pm = 48 28 x 3 4 7 , Therefore, when the double Y shift is 30 degrees, press q = 4 7 However, in this kind of fractional slot, it is designed as a double Y-shifted 30-degree 6-phase rectifier winding. To meet the above two technical requirements, there is no relevant literature introduction. It is necessary to seek this kind of true fractional slot double Y-shifted 30-degree 6-phase rectifier winding. A New Concrete Structure of Phase Rectification Windings

Method used

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  • Double-Y-shift 30-degree 6-phase rectifying winding of fractional slot
  • Double-Y-shift 30-degree 6-phase rectifying winding of fractional slot
  • Double-Y-shift 30-degree 6-phase rectifying winding of fractional slot

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Embodiment Construction

[0008] Such as figure 1 As shown, the fractional slot winding is designed to consist of coils with two spans, one with a span of 8 and one with a span of 2. 2 times the number, a coil with a span of 8 and two coils with a span of 2 form a joint, and every 4 joints form a 1-phase winding, for example, A 1 Phase winding, identified as A 1 x 1 .

[0009] Coils with a span of 8 are 7-16; 20-28; 32-40; 44-4;

[0010] Coils with a span of 2 are 9-11; 13-15; 21-23; 25-27; 33-35; 37-39; 45-47; 1-3;

[0011] The number of turns of the coil with a span of 8 is twice that of the coil with a span of 2. Among them, 7-16, 9-11, 13-15 form a joint, and the rest are analogously 20-28, 21-23, 25-27, 32-40, 33-35, 37-39; 44-4, 45-47, 1-3; form 3 groups respectively, the above 4 groups are connected according to the diagram, and the output is marked as A 1 x 1 、A 1 x 1 for A 1 Phase; similar composition B 1 Y 1 into B 1 Phase, C 1 Z 1 into C 1 Phase, A 1 , B 1 、C 1 The differ...

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Abstract

The invention discloses a double-Y-shift 30-degree 6-phase rectifying winding of a fractional slot, which is characterized in that a 48-slot 28-pole 6-phase double-Y-shift 30-degree fractional slot winding is designed into consisting of coils of two spans, one coil span is 8, the other coil span is 2, the turn number of the coils with the span of 8 doubles the turn number of the coils with the span of 2, one coil with the span of 8 and two coils with the span of 2 form a couplet, and every four couplets form a 1-phase winding. The rectifying winding has the technical effects that 1, the connected six-phase full-bridge rectification can greatly weaken 5th and 7th harmonics; 2, the rectifying winding does not cause mutual inductance interference with a 48-slot 2-pole 50Hz-power frequency three-phase alternating current winding and an intermediate-frequency third harmonic single-phase winding; and 3, the 11th, 13th, 17th and 19th harmonic content of the double-Y-shift 30-degree 6-phase winding is little, and the 5th and 7th harmonic content after 6-phase rectifying is reduced greatly, so after rectifying, the direct-current voltage ripple factor is small and less than 1 percent, and the direct current quality is good.

Description

technical field [0001] The invention relates to an AC winding of a multi-frequency generator with a common stator core, in particular to a 6-phase rectifying winding with fractional slots and double Y shifts of 30 degrees. Background technique [0002] Arrange multiple sets of windings with multiple frequencies in the common stator core, for example, arrange power frequency (50HZ) 2-pole three-phase AC windings in a stator core with 48 slots at a rated speed of 3000 rpm, and intermediate frequency (700HZ) 28 poles Double Y-shifted 30-degree 6-phase rectifier winding, intermediate frequency third harmonic (84 poles 2100HZ) single-phase winding. Requirements 1. There is no mutual inductance interference between these three sets of windings when they work at the same time. Requirements 2. After the double Y-shifted 30-degree 6-phase rectifier winding is rectified, the DC voltage ripple coefficient is small, and the voltage adjustment rate is small, all less than 1%. Stablize. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/28H02K3/04
Inventor 林政安
Owner TELLHOW SCI TECH CO LTD
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