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The inventive concept of a novel coating motor insulation film
Published Time:
2020-12-18
The inventive concept of a novel coating motor insulation film.
This invention relates to coated motor insulation films with improved corona resistance in an electric field. Motors (transformers, motors, generators) have complex insulation systems depending on their performance and design principles. Here, film materials are used as insulators in different areas. Film insulation materials include thermoplastic or chemically cross-linked polymer films. A reasonable number of film materials can be considered to meet mechanical, electrical, and thermal requirements. In the case of motors and generators, the corresponding film is wound around the conductor to insulate all or part of the conductor. Corona-resistant PI films can be used for partial conductor insulation. This film is very expensive and is only available from one manufacturer.
Mica-coated motor insulation film surface materials can be considered for all insulation. This solution is also expensive and difficult to handle. There is a possibility that mica particles may fall off in the coil. For polymer films, i.e., as a carrier for mica particles, PET (polyethylene terephthalate) films, PEN (polyethylene naphthalate) films, and PI (polyimide) films are mainly used.
The disadvantages of the prior art solutions are that the coated motor insulation films produced thereby are difficult to handle and expensive. For example, when winding around a conductor, the bending radius of the mica-coated film is smaller, otherwise the mica will fall off. In insulators according to the prior art, due to mechanical stability, the coated motor insulation film is usually impregnated with resin after winding, or in the case of materials containing mica, the semi-finished product is already impregnated with resin (so-called use of resin-rich materials), therefore, there is a risk of defects in the impregnated resin, which reduces the corona resistance and thus threatens the sustained reliability of the insulation. Therefore, the task of the invention is to produce an insulator for motors, in particular transformers, motors, generators, which have improved corona resistance in well-insulated motors.
Keywords:
Motor insulation film
Changzhou Haoda Technology Co., Ltd.
Chen Yuxiang:cyx@cnhaoda.com.cn
Chen Jie:chenjie@cnhaoda.com.cn
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