[Guide] The lead wire for the motor is a relatively common cable product. It is the key conductive raw material for connecting the main wire of the motor winding and the terminal. The thickness of the insulation layer, the withstand voltage level, the mechanical properties and the related chemical properties are affected by the motor Product design, manufacturing process and operating conditions will have different requirements.
Polymers are extremely important insulating materials and sheath materials for the manufacture of wires and cables. The characteristics of wire and cable mainly depend on the performance of wire and cable materials. The use requirements, structure and characteristics of wires and cables are closely related to the properties of the materials used in the wires and cables, but also have certain contradictions.
The lead wire for the motor is a relatively common cable product. It is the key conductive raw material for connecting the main wire of the motor winding and the terminal. The thickness of the insulation layer, the withstand voltage level, the mechanical performance and the related chemical performance are affected by the design of the motor product. There will be different requirements due to factors such as manufacturing process and operating conditions.
It is necessary to solve the problem of the fit of the cable and the motor performance. On the one hand, we must have an in-depth understanding of the specific purpose, use requirements, and environmental conditions of the wire and cable. Good design performance, small size, long life, and low price are the best wire and cable structures. In-depth study of various structures of wires and cables is necessary to change the law of various properties during use. On the other hand, it is necessary to select suitable cables based on the actual conditions of the motor, such as motor operating temperature, motor rated voltage, motor operating conditions and environment, etc., especially for the occasions with corrosive gas or liquid, and the requirements for cables Higher, the necessary protective performance of the cable is a guarantee to ensure the safe operation of the motor.
1. The performance of wire and cable
It is intuitively understood that wires and cables are conductors used to pass, and from a safety perspective, they must also have sufficient insulation performance. Comprehensive wire and cable use requirements, electrical insulation properties, physical-mechanical properties, chemical properties, process properties and anti-corrosion properties together constitute the characteristics of wires and cables. Among these characteristics, the first four properties are universal and must meet common requirements, while the latter is a special requirement for special environmental conditions.
The polymer materials used in wires and cables should also be analyzed in detail. The different chemical composition and physical structure of polymers may make them have extremely different properties. Sometimes one molecular structure often determines two completely contradictory performances. We are choosing When making materials, it is necessary to fully integrate the microstructure and macroscopic properties.
2. Electrical insulation performance of the cable
Electrical insulation properties are the most important and basic properties of polymers for wire and cable. The so-called electrical insulation performance is the dielectric and electrical conduction phenomena manifested by the movement of polymers under the action of high electric fields. The dielectric and conductive breakdown of polymers can be regarded as the macroscopic properties of polymers under voltage.
3. Why do we need to specify the maximum temperature of wire and cable during operation?
Polymers used as insulation and sheath materials for wires and cables are basically organic polymers containing carbon and hydrogen. When these polymers are heated, they will soften and melt; if they are heated further, the molten polymers will decompose and produce flammable gas. When the flammable gas reaches a certain concentration and temperature, it will react with oxygen in the air and burn. Burning will release a lot of heat, and this heat may further aggravate the melting and decomposition of the polymer, produce more combustible gas, so that the fire spread quickly.
For motor products, the factors affecting the temperature of the cable include the matching relationship between the conductive area of the lead wire and the rated motor, the temperature of the motor winding, and the actual operating ambient temperature of the motor.
Coreless brushed dc motor Coreless brushless dc motor Planetary gear motor Built-in Drive motor Servo motor