In what specific applications would polyester enamelled copper wire be preferred over polyesterimide, despite the added polyamide-imide overcoat?

Polyester enamelled copper wire, even with a polyamide-imide overcoat, may be preferred over polyesterimide in the following specific applications:

  1. Cost-Sensitive Projects:
    • General Electronics: For cost-sensitive electronics where the operating temperature and environmental conditions are moderate, the cost savings from using polyester enamelled wire can be significant.
    • Consumer Appliances: Household appliances like fans, mixers, and small kitchen appliances where extreme thermal stability is not required can benefit from the cost-effectiveness of polyester enamelled wire.
  2. Applications with Lower Thermal Requirements:
    • Basic Transformers: Transformers used in applications where the temperature does not exceed 155°C can use polyester enamelled wire effectively.
    • Relays and Solenoids: These devices, often used in moderate thermal environments, can function well with polyester enamelled wire, especially when cost is a concern.
  3. Situations Requiring Easier Solderability:
    • Circuit Board Inductors: In situations where the wire needs to be soldered easily to circuit boards, polyester enamelled wire can be advantageous due to its ease of soldering compared to polyesterimide.
    • Small Motors and Actuators: Devices that require frequent repairs or modifications may benefit from the easier handling and soldering characteristics of polyester enamelled wire.
  4. Applications with Limited Chemical Exposure:
    • Indoor Electrical Installations: Installations within controlled environments where exposure to harsh chemicals and solvents is minimal can effectively use polyester enamelled wire.
    • Lighting Ballasts: Ballasts for lighting systems that operate in indoor environments with stable conditions can leverage the cost benefits of polyester enamelled wire.
  5. Projects with Lesser Mechanical Stress:
    • Stationary Coils and Windings: In applications where the wire is not subjected to significant mechanical stress or vibration, polyester enamelled wire can be a suitable and cost-effective choice.
    • Educational and Prototype Projects: For educational purposes or prototype development where high durability is not a primary concern, polyester enamelled wire provides a balance of performance and affordability.

In summary, polyester enamelled copper wire with a polyamide-imide overcoat is preferred in applications where cost efficiency, moderate thermal performance, easier solderability, and limited exposure to harsh environments are key considerations.



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