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Self-adaptive magnetic-conducting slot wedge and preparation method thereof

A magnetic groove and self-adaptive technology, applied in the manufacture of motor generators, electrical components, electromechanical devices, etc., can solve the problems of limited bonding force, easy loosening and falling off, etc., to achieve enhanced magnetic permeability, good bonding force, The effect of improving motor efficiency

Inactive Publication Date: 2012-11-14
SUZHOU JUFENG ELECTRICAL INSULATION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(Magnetic) There is a gap between the slot wedge and the iron core, which is fixed by the impregnated insulating varnish after curing, and the bonding force is limited, so it is easy to loosen and fall off

Method used

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  • Self-adaptive magnetic-conducting slot wedge and preparation method thereof
  • Self-adaptive magnetic-conducting slot wedge and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as figure 1 and as figure 2 As shown, a self-adaptive magnetically conductive slot wedge is installed at the notch on the stator and rotor of the motor, and is suitable for VPI process treatment, including a magnetically conductive layer 11 and two layers of second expansive felt 13 with expansion effect , the second expansive felt 13 is arranged on the outside of the magnetic permeable layer 11, and the first expansive felt 12 is arranged on the outside of the two layers of the second expansive felt 13; the first expansive felt 12 includes The glass fiber cloth layer 15 and the common expansive felt with expansion function; the second expansive felt 13 and the common expansive felt form an expansive layer; an adhesive layer 14 is arranged between the various material layers.

[0052] The stator and the rotor of the motor are provided with a slot cavity, and a wire 3 is arranged in the slot cavity, and the wire 3 is covered with an insulating layer 4, and pad strip...

Embodiment 2

[0082] The rest are the same as in Example 1, except that the volume of the magnetic permeable layer 11 accounts for 50% of the total volume of the slot wedge, the volume of the expansion layer accounts for 39.5% of the total volume of the slot wedge, and the glass fiber The volume of the cloth layer 15 accounts for 5% of the total volume of the slot wedge, and the volume of the adhesive layer 14 accounts for 5.5% of the total volume of the slot wedge.

[0083] The magnetic permeable layer 11 includes multiple groups of metal wires and metal meshes, the metal wires are arranged in parallel with the metal meshes, and the metal wires are arranged alternately with the metal meshes, and a layer of metal meshes is arranged on both sides of the metal meshes The metal wire, the second expansive felt that acts as a spacer is arranged between the metal wire and the metal mesh. After the second expansive felt is glued, the fiber holes are all impregnated with glue. Two expansion felts, ...

Embodiment 3

[0103] The rest are the same as in Example 2, except that the volume of the magnetic permeable layer 5 accounts for 41% of the total volume of the slot wedge, the volume of the expansion layer accounts for 30% of the total volume of the slot wedge, and the glass fiber The volume of the cloth layer 15 accounts for 20% of the total volume of the slot wedge, and the volume of the adhesive layer 14 accounts for 9% of the total volume of the slot wedge.

[0104] The present invention also provides a preparation method of self-adaptive magnetically permeable slot wedge, the preparation method is specifically as follows:

[0105] (1) Prepare expansive felt and glass cloth;

[0106] The expansive mat is a roll material, the raw material is electrical alkali-free glass filament, the thickness is 0.5-10 mm, and the width is 900 mm or 1000 mm;

[0107] The glass cloth can be selected from various brands of electrical alkali-free glass cloth with a thickness of 0.14mm and a width of 900m...

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Abstract

The invention discloses a self-adaptive magnetic-conducting slot wedge, which is installed at slot opening on a stator / rotor of a motor, and suitable for being treated by a VPI (vacuum pressure impregnation) technical process. The self-adaptive magnetic-conducting slot wedge comprises a magnetic-conducting layer and two layers of second expandable felts with an expansion action, wherein the second expandable felts are arranged at the outer side of the magnetic-conducting layer, and a first expandable felt is arranged at the outer side of each of the two layers of second expandable felts; each first expandable felt comprises a glass fibre cloth layer and a common expandable felt with an expansion action; the second expandable felts and the common expandable felts form expandable layers; and gluing layers are arranged among the various material layers. By adopting the self-adaptive magnetic-conducting slot wedge provided by the invention, the slot wedge can be closely filled in the slot opening, the bonding force between the slot openings and the slot wedge is good, and the mechanical strength is high, so that the magnetic-conducting capacity of the slot wedge is enhanced, flux in slot is uniform, the loss of the motor is reduced, and the efficiency of the motor is increased.

Description

technical field [0001] The invention relates to a slot wedge installed on a motor rotor and a stator, in particular to an self-adaptive magnetically conductive slot wedge used in VPI process treatment and a preparation method thereof. Background technique [0002] A motor is a device that converts electrical energy into mechanical energy. During the production process of the motor, it is necessary to open slots on the stator and rotor, and arrange coils in the slots, and fix the coils in the slots by installing slot wedges of various shapes on the slots. Due to the existence of the notch, the slot tooth effect is caused in the motor, which produces the energy consumption of the motor itself, reduces the efficiency, and brings a series of problems such as increased temperature rise, increased noise, and shortened life. To reduce loss and improve efficiency, it is necessary to reduce the cogging effect. [0003] At present, slot wedges can be divided into two categories, ord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/493H02K15/00
Inventor 徐伟红陶纯初夏宇
Owner SUZHOU JUFENG ELECTRICAL INSULATION SYST
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