Alternating current motor wave winding and transpositional connection method thereof

An AC motor, wave winding technology, applied in the shape/style/structure of winding conductors, etc., can solve the problems of large temperature difference between conductors, affecting the life of insulation, motor output and operating efficiency, etc.

Active Publication Date: 2012-11-28
中国船舶重工集团公司第七一二研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the nose is only twisted and shifted once, and the current between the conductors in the slot is still unbalanced. In the case of high current, a non-negligible circulation loss will be generated, and the temperature difference between the conductors is large, which will affect the service life of the insulation and the output of the motor. and operating efficiency

Method used

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  • Alternating current motor wave winding and transpositional connection method thereof
  • Alternating current motor wave winding and transpositional connection method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Such as figure 1 , 2 As shown, it is a wave winding for low-voltage and high-current AC motors. The coil of the AC motor is changed from a double-layer single-turn wave winding coil to a double-layer double-turn wave winding coil, and the current of each turn is a double-layer single-turn wave winding coil. Half of the current; the double-turn wave winding coil has 4 noses that can be twisted and shifted; the ends of the 4 noses are respectively marked: a, b, c, d; each end has 2 wire groups, respectively marked For: a1, a2, b1, b2, c1, c2, d1, d2. In the AC motor wave winding, the inter-turn insulation of the double-turn wave winding is the main insulation.

Embodiment 2

[0017] Example 2: Such as figure 1 , 2 Shown is the embodiment of the transposition connection method for the AC motor wave winding of the present invention. In the transposition connection method of the AC motor wave winding, the coil of the AC motor is changed from a double-layer single-turn wave winding coil to a double-layer double-turn wave winding coil, and the current of each turn is half of the current of the double-layer single-turn wave winding coil ; The double-turn wave winding coil has 4 nose ends capable of twisting and transposition; the parallel joints of the nose ends are connected in the way of a-d, b-c; after paralleling, each phase winding forms 4 branches, which are: a1d1, a2d2, b1c1, b2c2; any branch in a1d1, a2d2 is connected in series with a branch in b1c1, b2c2 to form a new branch, and each phase winding has two branches with the same phase in series or parallel. In the transposition connection method of the AC motor wave winding described in this...

Embodiment 3

[0018] Example 3: Different from embodiment 2, described a1d1, any branch in a2d2 is connected in series with b1c1, a branch in b2c2 to form a new branch, and its series connection is connected by b1-d1, a2-c2 mode, Two branches of a1c1 and d2b2 with the same phase are formed, and interlayer transposition is realized through this docking method.

[0019] The technical effect of the present invention is remarkable:

[0020] The double-layer double-turn wave winding is adopted, and the turns are connected in different ways when the windings are paralleled and the branches are connected in series, which can realize the secondary transposition of the conductors in the motor winding, so that the current distribution between the parallel conductors in the coil is even, and the circulating current is reduced. Reduce loss and temperature difference between conductors, prolong insulation life, improve motor output and operating efficiency. The transposition connection method has sim...

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Abstract

The invention relates to an alternating current (AC) motor wave winding and a transpositional connection method thereof, and aims at a low-voltage high-current wave winding AC motor. The two-layer single-turn wave winding coil of the AC motor is replaced with a two-layer two-turn wave winding coil, and the current of each turn is half than that of the two-layer single-turn wave winding coil; and the two-turn wave winding coil has four noses capable of implementing twisting transposition. The transpositional connection method comprises the following steps: the ends a and d and the ends b and c of the noses are connected respectively; each connected phase winding forms four branches, respectively a1d1, a2d2, b1c1 and b2c2; one of the branches of a1d1 and a2d2 is connected with one of the branches of b1c1 and b2c2 in series to form a new branch; and two branches of the same phase in each phase winding are connected in series or in parallel. The AC motor wave winding has the advantages of implementing the secondary transposition of conductors in the motor winding and the uniform current distribution of the conductors connected in parallel in the coil, reducing the current-circulation loss and the temperature difference between conductors, prolonging the insulation service life and improving the output and operation efficiency of the motor. The transpositional connection method is simple in process and obvious in effect.

Description

technical field [0001] The invention relates to a wave winding of an AC motor and a transposition connection method thereof, and is aimed at an AC motor with a low-voltage high-current wave winding. Background technique [0002] Conventional AC motor wave windings are generally double-layer single-turn wave windings, the nose is twisted and shifted, and the other end is connected directly to form a whole piece. In this method, the nose is only twisted and shifted once, and the current between the conductors in the slot is still unbalanced. In the case of high current, a non-negligible circulation loss will be generated, and the temperature difference between the conductors is large, which will affect the service life of the insulation and the output of the motor. and operating efficiency. Contents of the invention [0003] The object of the present invention is to provide a wave winding of an AC motor and its transposition connection method, so that the current distributi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/28
Inventor 张立春项思源蔡凭张文敏吕长朋
Owner 中国船舶重工集团公司第七一二研究所
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