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Armature windings of rotating electrical machines

A technology for armature windings and rotating electrical machines, applied to the shape/style/structure of winding conductors, which can solve the problems of natural vibration frequency detuning, multi-core vibration, low rigidity, etc.

Active Publication Date: 2015-08-05
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as described above, in a 4-pole motor, the armature core yoke is made thin, and the rigidity of the armature core with respect to circular vibration is lower than that of a 2-pole motor, and in the 2-diameter node mode for Circular vibration is sometimes difficult to detune the natural frequency sufficiently
In this case, the electromagnetic excitation force of the 4-pole component (2-diameter node mode) generated in the fractional-slot motor causes excessive core vibration

Method used

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  • Armature windings of rotating electrical machines
  • Armature windings of rotating electrical machines
  • Armature windings of rotating electrical machines

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0035] First, the armature winding of the rotary electric machine according to the first embodiment will be explained.

[0036] figure 1 is a developed schematic diagram showing one phase of the armature winding of the rotary electric machine according to the first embodiment. figure 2 is a developed schematic diagram showing a cross section of an armature of a rotary electric machine according to the same embodiment.

[0037] The armature 11 of the rotating electric machine is provided with 54 slots 13 in the armature core 12 constituted by a laminated core, and in the slots 13 an electrical circuit of a 4-pole 3-phase circuit is formed in two layers. Pivot winding 14.

[0038] The armature winding 14 of each phase includes an upper coil piece 15 located at an upper portion of the slot 13 and a lower coil piece 16 located at a lower portion of the slot 13 . The ends of the upper coil piece 15 and the lower coil piece 16 are connected in series at a connection-side coil e...

no. 2 example

[0049] Next, an armature winding of a rotary electric machine according to a second embodiment will be explained.

[0050] In the second embodiment, elements common to those of the first embodiment are given the same reference numerals, and redundant explanations are omitted. Portions different from the first embodiment are mainly explained.

[0051] image 3 is a developed schematic diagram showing one phase of the armature winding of the rotary electric machine according to the second embodiment.

[0052] exist image 3 , four jumpers 20a are provided per phase at the connection-side coil end 19a of each of the phase belts 17 and 18, and eight jumpers are provided per phase at the opposite connection-side coil end 19b. 20b. In the 4-coil phase belt 17, the upper coil piece 22 on the innermost position viewed from the center of the phase belt is replaced with the upper coil piece 24 of the adjacent 5-coil phase belt of different phases, and from the phase belt The lower ...

no. 3 example

[0061] Next, an armature winding of a rotary electric machine according to a third embodiment will be explained.

[0062] In the third embodiment, elements common to those of the first embodiment are given the same reference numerals, and explanations thereof are omitted. Portions different from the first embodiment are mainly explained.

[0063] Figure 4 is a developed schematic diagram showing one phase of the armature winding of the rotating electric machine according to the third embodiment.

[0064] exist Figure 4 In , four jumpers 20a are provided per phase at the connection-side coil end 19a of each of the phase belts 17 and 18 . In the 4-coil phase belt 17, the upper coil piece 22 at the innermost position viewed from the center of the phase is replaced by the upper coil piece 24 of the adjacent 5-coil phase belt of different phases, and viewed from the center of the phase belt The lower coil piece 23 on the outermost position is replaced by the lower coil piece ...

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Abstract

According to one embodiment, there is provided a 3-phase 4-pole 2-layer armature winding (14) of a rotating electrical machine. A winding of each phase of the armature winding (14) forms a series coil. Each series coil includes upper coil pieces (15) and lower coil pieces (16) which are connected each other at a connection side coil end (19a) and a counter-connection side coil end (19b), the upper coil pieces (15) and lower coil pieces (16) being placed in 54 slots (13) provided in an armature core (12). At least one coil piece (22 or 23) of the upper and lower coil pieces (15, 16), provided in at least one of an innermost position and an outermost position from the center of a phase belt of each phase, is replaced with a coil piece (24 or 25) of an adjacent phase.

Description

technical field [0001] Embodiments described herein relate generally to armature windings of rotating electric machines. Background technique [0002] In a large-capacity rotating electric machine, the armature winding includes an upper coil piece and a lower coil piece formed in two layers in slots provided in an armature core constituted by a laminated core, and Coil pieces are connected in series to increase the generated voltage and motor capacity. However, as the voltage of the armature winding increases, the thickness of the main insulation becomes thicker, the cross-sectional area of ​​the conductor decreases, and the current density becomes greater, causing increased loss. If the voltage of the armature winding is greatly increased, the reliability of the main insulation is reduced. [0003] The number of slots is important for setting the voltage of the armature winding. In a 4-pole 3-phase motor, the number of slots is reduced to half that of a 2-pole motor by u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K3/12
CPCH02K3/28
Inventor 德增正上田隆司一文字正幸大高彻平松大典垣内干雄
Owner KK TOSHIBA