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Magnetic slot wedge and production method thereof

A technology of magnetic slot wedge and magnetic material, applied in electromechanical devices, electrical components, manufacturing of motor generators, etc., can solve the problems of lack of mechanical strength, inability to meet long-term use, low magnetic permeability, etc., to achieve a simple production method and easy on-site Operation control, high permeability effect

Inactive Publication Date: 2012-05-30
HENGSHUI ELECTRIC MOTORS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The magnetic slot wedges in the prior art have low magnetic permeability, and do not have sufficient mechanical strength to meet the requirements of long-term use

Method used

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  • Magnetic slot wedge and production method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The weight percentage of each component is: 943 unsaturated polyester resin 18%, internal mold release agent (JL-125) 0.5%, tert-butyl peroxybenzoate 0.2%, dibenzoyl peroxide 0.3%, reduced iron powder 57%, 24% non-alkali glass fiber.

[0012] The production method is: (1) prepare the above-mentioned 943 unsaturated polyester resin, internal mold release agent (JL-125), tert-butyl peroxybenzoate, and dibenzoyl peroxide into an adhesive in proportion; (2) heat The temperature of the mold is raised to 150°C-200°C, and the drawing rate is 0.8-1.40r / min; (3) The alkali-free glass fiber impregnated with the adhesive is pultruded through the mold, and the thickness and width of the formed slot wedge are checked with a caliper with a watch. The thickness is 2-6mm (can be adjusted according to user requirements), the width is 4.5-28mm (can be adjusted according to user requirements), and recorded in the production record; (4) Cut the cooled slot wedge according to the model size...

Embodiment 2

[0014] The weight percentage of each component is: 943 unsaturated polyester resin 20%, internal mold release agent (JL-125) 1%, tert-butyl peroxybenzoate 0.5%, dibenzoyl peroxide 0.1%, reduced iron powder 54%, E-glass fiber 24.4%.

[0015] The production method is: (1) prepare the above-mentioned 943 unsaturated polyester resin, internal mold release agent (JL-125), tert-butyl peroxybenzoate, and dibenzoyl peroxide into an adhesive in proportion; (2) heat The temperature of the mold is raised to 150°C-200°C, and the drawing rate is 0.8-1.40r / min; (3) The alkali-free glass fiber impregnated with the adhesive is pultruded through the mold, and the thickness and width of the formed slot wedge are checked with a caliper with a watch. The thickness is 2-6mm (can be adjusted according to user requirements), the width is 4.5-28mm (can be adjusted according to user requirements), and recorded in the production record; (4) Cut the cooled slot wedge according to the model size; (5 ) G...

Embodiment 3

[0017] The weight percentage of each component is: 943 unsaturated polyester resin 19.4%, internal mold release agent (JL-125) 1%, tert-butyl peroxybenzoate 0.5%, dibenzoyl peroxide 0.1%, reduced iron powder 54%, E-glass fiber 25%.

[0018] The production method is: (1) prepare the above-mentioned 943 unsaturated polyester resin, internal mold release agent (JL-125), tert-butyl peroxybenzoate, and dibenzoyl peroxide into an adhesive in proportion; (2) heat The temperature of the mold is raised to 150°C-200°C, and the drawing rate is 0.8-1.40r / min; (3) The alkali-free glass fiber impregnated with the adhesive is pultruded through the mold, and the thickness and width of the formed slot wedge are checked with a caliper with a watch. The thickness is 2-6mm (can be adjusted according to user requirements), the width is 4.5-28mm (can be adjusted according to user requirements), and recorded in the production record; (4) Cut the cooled slot wedge according to the model size; (5 ) G...

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Abstract

The invention discloses a magnetic slot wedge and a production method thereof. The magnetic slot wedge comprises 18-20 percent of 943 unsaturated polyester resin, 0.5-1 percent of internal releasing agent, 0.2-0.5 percent of tert-butyl perbenzoa, 0.1-0.3 percent of dibenzoyl peroxide, 54-57 percent of magnetism enhancing material and 24-25 percent of alkali-free glass fiber. The production method of the magnetic slot wedge comprises the following steps of: firstly, preparing the unsaturated polyester resin, the internal releasing agent and peroxide initiators into an adhesive; secondly, heating a die and raising the temperature to be 150-200DEG C, wherein the drawing speed is 0.8-1.40r / min; thirdly, carrying out pultrusion on the alkali-free glass fiber impregnated with the adhesive through the die; fourthly, cooling and cutting the slot wedge; fifthly, grinding the cut slot wedge; sixthly, treating the surface of the slot wedge with paint to realize smoothness and burr freeness; and seventhly, air-drying, detecting and packaging the slot wedge. The magnetic slot wedge has the advantages of high magnetic permeability, high split resistance and high bending resistance as well as is simple in production method.

Description

technical field [0001] The invention relates to a magnetic slot wedge and a production method thereof. The magnetic slot wedge is mainly used in stator cores of large and medium-sized AC high-voltage motors. Background technique [0002] Due to the insulation and manufacturing process requirements of large and medium-sized AC high-voltage motors, the stator winding adopts formed coils, and the iron core of the stator is made into open slots. The opening of the slot will cause the change of cogging reluctance to be intensified, and the air gap magnetic density distribution will be uneven, which will increase the harmonic wave of the air gap magnetic conduction tooth, which will cause the increase of the motor excitation current, the increase of the rotor surface loss and the pulse vibration loss, resulting in The temperature rise of the motor increases and the efficiency decreases. The use of ordinary slot wedges in large and medium-sized AC high-voltage motors cannot solve ...

Claims

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Application Information

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IPC IPC(8): H02K3/493H02K15/00C08L67/06C08K13/02C08K5/14C08K7/14C08K3/08
Inventor 郝才军
Owner HENGSHUI ELECTRIC MOTORS
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