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Bonded permanent magnet for large direct-drive permanent-magnet generator

A permanent magnet generator, permanent magnet technology, applied in the direction of magnetic circuit shape/style/structure, layered products, metal layered products, etc., can solve the problems of irreversible demagnetization of permanent magnets, damage to generator performance, etc., to reduce heat , The effect of reducing surface eddy current and excellent insulation performance

Inactive Publication Date: 2012-10-17
GUODIAN UNITED POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

In addition, if the temperature of the permanent magnet is too high, it will cause irreversible demagnetization of the permanent magnet, which will cause great damage to the performance of the generator.

Method used

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  • Bonded permanent magnet for large direct-drive permanent-magnet generator

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Embodiment Construction

[0017] see figure 1 As shown, a bonded permanent magnet for a large direct-drive permanent magnet generator of the present invention is formed by bonding a plurality of small permanent magnets 1 .

[0018] Furthermore, the outer surface of each small permanent magnet 1 is provided with nickel-copper plus epoxy coating 2, that is, the surface of the permanent magnet 1 is first coated with a layer of nickel-copper alloy coating, and after the nickel-copper alloy coating is coated, another layer of ring is added. Oxygen coating, two coatings with different properties can ensure that the permanent magnet has good salt spray resistance, heat and humidity resistance and anti-corrosion performance, and better guarantee the operating life of the permanent magnet generator.

[0019] The small permanent magnets 1 after coating are bonded by epoxy glue 3. The curing characteristics of epoxy glue 3 can ensure the high shape tolerance and dimensional tolerance of each group of permanent ma...

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Abstract

The invention relates to a bonded permanent magnet for a large direct-drive permanent-magnet generator. The permanent magnet is formed by bonding a plurality of small permanent magnets. Since each permanent magnet group is formed by bonding a plurality of permanent magnets, the surface eddy, heat and thermal loss of the permanent magnets can be effectively reduced; in consideration of the requirements for salt-fog resistance and humidity-heat resistance in the overall operating environment of a wind-driven generator set, the coating thereof can ensure that the permanent magnets can meet the operating requirements under severe environmental conditions and can not cause the inter-layer conduction of the permanent magnets; and epoxy glue used for bonding the permanent magnets has fine insulating properties such as high temperature resistance, convenient curing process, high dielectric property, surface creepage resistance and arc resistance. In use, the invention can effectively ensure assembling requirements, can achieve the technical requirement effect and can be widely used for permanent magnets of various large permanent-magnet generators.

Description

technical field [0001] The invention relates to a permanent magnet of a large permanent magnet motor, in particular to an adhesive permanent magnet used for a large direct drive permanent magnet generator. Background technique [0002] At present, wind power generators are developing in the direction of high reliability, low maintenance, reduced components, lower costs, high efficiency, and high integration. The general trend is that the capacity of a single machine continues to increase. In recent years, direct drive and brushless generators have attracted more and more attention. With the continuous development and wide application of direct-drive permanent magnet generators for wind power generation, NdFeB permanent magnets (hereinafter referred to as permanent magnets) have been widely used as the main components of permanent magnet generators, and the assembly form of permanent magnets has become a permanent magnet. An important link in the manufacturing and processing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/06B32B15/04
Inventor 武尧尧高宏志苏剑涛肖珊彩
Owner GUODIAN UNITED POWER TECH
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