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Novel AC generator stator wire rod transposition method

A technology of alternator and stator bar, used in the manufacture of motor generators, electrical components, electromechanical devices, etc., can solve the problems of increased circulating current loss, reduce circulating current and circulating current loss, have great practical significance, and reduce circulating current. The effect of loss

Active Publication Date: 2015-08-19
HARBIN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But when the load current changes, the circulation loss increases significantly

Method used

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  • Novel AC generator stator wire rod transposition method
  • Novel AC generator stator wire rod transposition method
  • Novel AC generator stator wire rod transposition method

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Embodiment Construction

[0032] The specific implementation manner of the patent of the present invention will be further described below in conjunction with the accompanying drawings.

[0033] Such as figure 1 As shown, the basic steps of transposition of strands in the groove are as follows:

[0034] (1) The strands are arranged horizontally in several rows. The present invention takes two rows of strands as an example, and each layer of wire rods contains 18 strands;

[0035] (2) The left row of strands and the right row of strands extend along the traveling direction of the strands respectively at different angles. The groove bottom direction (22) is inclined downward;

[0036] (3) The first strand (10) at the top of the left row passes through the first transposition bend (21a) along the direction of travel to the top of the first strand (9) at the top of the right row, and the inclination angle changes until it is in line with The right row of strands travels in the same direction;

[0037] ...

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Abstract

The invention discloses a novel AC generator stator wire rod transposition method. By use of the transposition method, 360-degree total transposition, less than 360-degree transposition, void transposition and the like can be carried out at groove portions of wire rods, parallel short circuiting on strands at the end portions of the wire rods by use of end to end joint sleeves is unnecessary, the strands in the different wire rods can be connected one by one according to a selected pitch in accordance with an "end to end correspondence" principle, each strand is wrapped by insulating varnish in advance according to requirements, and the strands can be connected at strand connecting positions by use of copper sheets equal to the sectional area of the strands. The novel stator wire rod transposition method can realize various transposition schemes of conventional strands, the circulation among the strands is substantially reduced compared to a conventional transposition scheme, and the circulation loss can be effectively reduced under the condition of different load currents. Therefore, the stator wire rod transposition method provides a reference value to a certain degree for an energy-saving design of an AC generator and has a quiet large practical significance.

Description

technical field [0001] The invention relates to the technical field of alternator design and manufacture, in particular to a novel alternator stator bar transposition method. Background technique [0002] The stator winding of an alternator is generally composed of multiple strands and wound into a strip bar. Since each strand is in the complex alternating magnetic field at the groove and end, the current passing through the wire bar has two additional currents besides the load current, which are the eddy current and any arbitrary current in each strand. Circulation between loops formed by two strands. The generation of eddy current makes the distribution of current density uneven at each point inside the strand, resulting in an increase in additional copper loss, but the use of thinner flat copper wire can basically solve the problem of eddy current. The circulating current is caused by the unequal potential of each parallel strand, because the parallel strands are in dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/04
Inventor 梁艳萍陈元琦
Owner HARBIN UNIV OF SCI & TECH
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