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Laminated magnetic conducting plate and manufacturing method thereof

A manufacturing method and technology of a magnetic conductive plate, applied in chemical instruments and methods, layered products, magnetic properties of inorganic materials, etc., can solve the problems of poor mechanical strength, low heat resistance of products, loose powder structure, etc. The effect of improving adhesion and heat resistance, excellent mechanical properties, and insulating properties

Active Publication Date: 2011-08-31
北京新福润达绝缘材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some defects in the use of magnetic slot mud: 1. The assembly of magnetic slot mud requires a certain period of heat curing or cold curing, and it cannot be used directly, and the assembly time is long; 2. The magnetic permeability of the slot wedge is determined by the applied slot mud. 3. The mechanical strength is poor, the high temperature strength is lower, the motor is easy to fall off during operation, and it cannot be used for a long time. These limit the use of magnetic groove mud
Practice has proved that the products produced by this process have shortcomings: 1. The production process has strict time requirements, and its product quality depends on strict compliance with process operations and the precision of manufacturing equipment and molds; 2. There are currently many motor manufacturers. The stator VPI dipping process is used, and the VPI dipping process temperature is above 165°C. The molded structural wedges are likely to cause loose powder structure; 3. The molded magnetic slot wedges are formed at one time, while the laminated magnetic slot wedges are formed by lamination. The magnetic plate is processed, and the accuracy is easy to guarantee. If there is a problem with the tolerance when inserting the wire, it cannot be mechanically ground for secondary processing; 4. The production efficiency of the molded magnetic slot wedge is low and the cost is high.
The feature of this invention is that the iron powder can be evenly distributed, which is beneficial to the improvement of the magnetic permeability, but the heat resistance of the polyester resin itself and the reactive solvent is poor, the heat resistance of the product is not high, and the bonding force with the magnetic permeability layer is not good. Strong, affecting product performance

Method used

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  • Laminated magnetic conducting plate and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 100 parts by weight of composite resin, 30 parts by weight of diaminodiphenylsulfone, 1.0 parts by weight of boron trifluoride monoethylamine, 30 parts by weight of composite solvent, 2,6-di-tertiary butyl-4-methylphenol and sulfur 0.7 parts by weight of dioctadecyl dipropionate mixed at a mass ratio of 3 / 2, and 0.3 parts by weight of KH550 are uniformly mixed, slowly and uniformly added 370 parts by weight of 100 mesh reduced iron powder and stirred evenly with a high-speed mixer to obtain a paste , a soft magnetic resin paste with a viscosity of 20000mPa.s; the magnetic resin paste is uniformly coated on the surface of 100 parts by weight of alkali-free glass fiber cloth or glass fiber cloth for electrical use (60 grams per square meter), and the evenly coated resin paste The glass cloth passes through a vertical furnace with a furnace temperature of 120°C and a vehicle speed of 0.5 meters per minute. The resin-pasted glass cloth coming out of the furnace becomes a pre...

Embodiment 2

[0030]100 parts by weight of composite resin, 30 parts by weight of diaminodiphenylsulfone, 1.0 parts by weight of boron trifluoride monoethylamine, 30 parts by weight of composite solvent, 2,6-di-tertiary butyl-4-methylphenol and sulfur 0.7 parts by weight of dioctadecyl dipropionate mixed at a mass ratio of 3 / 2, and 0.3 parts by weight of KH550 are uniformly mixed, slowly and uniformly added 370 parts by weight of 100 mesh reduced iron powder and stirred evenly with a high-speed mixer to obtain a paste , a soft magnetic resin paste with a viscosity of 20000mPa.s; the magnetic resin paste is uniformly coated on the surface of 100 parts by weight of alkali-free glass fiber cloth or glass fiber cloth for electrical use (60 grams per square meter), and the evenly coated resin paste The glass cloth passes through a vertical furnace with a furnace temperature of 120°C and a vehicle speed of 0.5 meters per minute. The resin-pasted glass cloth coming out of the furnace becomes a prep...

Embodiment 3

[0032] 100 parts by weight of composite resin, 5 parts by weight of dicyandiamide, 0.05 parts by weight of 2-methylimidazole, 25 parts by weight of composite solvent, 2,6-two-tertiary butyl-4-methylphenol and trioctyl phosphate Mix 1.5 parts by weight of the mixture with a mass ratio of 5 / 3, and 0.5 parts by weight of KH5600. Stir evenly to obtain a paste-like magnetic resin paste with a viscosity of 100,000mPa.s; the magnetic resin paste is evenly coated on the surface of 90 parts by weight of alkali-free glass fiber cloth or glass fiber cloth for electrical use (250 grams per square meter), Evenly coated resin-pasted glass cloth passes through a horizontal furnace with a furnace temperature of 180 degrees and a vehicle speed of 5 meters per minute. The resin-pasted glass cloth coming out of the furnace becomes a prepreg, and the mass of the obtained prepreg is 2000 grams per square meter; The prepreg is cut according to the required size, laid up according to the required th...

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Abstract

The invention discloses a laminated magnetic conducting plate and a manufacturing method thereof. The laminated magnetic conducting plate is made from the following raw materials parts by weight: 100 parts of composite resin, 3-35 parts of amine curing agent, 0.05-2 parts of curing accelerant, 370-400 parts of soft magnetic material, 60-100 parts of glass fiber cloth and 0.7-1.5 parts of antioxidant, wherein the composite resin is the mixture of bisphenol A type epoxy resin, novolac epoxy resin and multi-functionality epoxy resin. The manufacturing method of the laminated magnetic conducting plate comprises the steps: forming an alkali-free glass fiber cloth or a glass fiber cloth for electricians, the composite resin and a magnetic material into semi-solidified sheets through one-off surface sizing by using a lamination method; and then superposing and pressing the semi-solidified sheets to form the magnetic conducting plate. The laminated magnetic conducting plate of the invention has high magnetic conductivity, excellent mechanical property, good processability, long service life and is suitable for processing the magnetic slot wedges of various types of motors.

Description

technical field [0001] The invention relates to a laminated magnetic conductive plate and a manufacturing method thereof. Background technique [0002] With the development of the economy, the energy shortage is becoming more and more serious, and energy saving and consumption reduction have become an inevitable trend. As the prime mover, the electric motor is widely used in all walks of life, and the electricity consumption is 60% of the national power generation capacity of 4 trillion kWh (2010). It is imperative. Among motor performance indicators, efficiency is an important parameter. There are various methods to improve the efficiency of the motor, such as optimizing design and control, increasing the effective material of the motor, and using frequency conversion technology. Using magnetic slot wedges to replace non-magnetic slot wedges in motor stators is one of the most cost-effective ways to increase motor efficiency. The use of magnetic slot wedges has a signif...

Claims

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Application Information

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IPC IPC(8): H01F1/12B32B17/02B32B17/10B32B27/18H02K3/493
Inventor 李守杰李娟刘健张金鑫马立生
Owner 北京新福润达绝缘材料有限责任公司
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