Material Preparation
Polypropylene Film: Choose the right thickness and width of polypropylene film.
Metallization Material: Usually aluminum or zinc, used for metallizing both sides of the film.
Film Metallization
Metallization: The polypropylene film is coated with a thin layer of metal on both sides through vacuum deposition. This creates the capacitor's electrodes.
Winding
Winding: The double-sided metallized film is wound tightly to form the capacitor core, which determines the capacitance and other electrical properties.
Edge Treatment: The core is trimmed to ensure good contact with the electrodes.
Impregnation
Resin Impregnation: The wound core is soaked in special resin to strengthen the capacitor and improve voltage resistance.
Curing: The resin-soaked core is heated and cured, usually in a vacuum to remove air bubbles.
Encapsulation
Casing: The cured capacitor core is placed in a plastic or metal case.
Sealing: The case is sealed to protect the capacitor from moisture and impurities.
Electrode Connection
Electrode Soldering: Electrodes are soldered to the metallized layers on both sides of the core for external connection.
Spray Coating: Sometimes the electrodes are spray-coated to prevent corrosion.
Testing and Inspection
Electrical Testing: The finished capacitor is tested for capacitance, dissipation factor, voltage resistance, and insulation resistance.
Visual Inspection: The capacitor's appearance is checked for size, shape, and markings.
Packaging and Shipping
Packaging: Qualified capacitors are packed, usually in anti-static bags or trays.
Shipping: Finally, the packaged products are shipped to customers.
Electronic Power Equipment
Inverters and Converters: Used for filtering and harmonic suppression to improve power quality.
UPS (Uninterruptible Power Supplies): Used for voltage stabilization and filtering.
Audio and Video Equipment
Sound Systems: For signal coupling and filtering in high-fidelity audio.
Video Devices: Used in TVs and monitors to reduce noise and distortion.
Power Supply and Power Management
Switching Power Supplies: For filtering and energy storage.
Battery Management Systems: Used for voltage regulation and energy management.
Industrial Control and Automation
Motor Drives: For filtering and harmonic suppression in motor control systems.
Industrial Controllers: For signal processing in automation systems.
Medical Devices
Imaging Equipment: For filtering in CT and MRI scanners.
Monitoring Devices: For power filtering in ECG and blood pressure monitors.
Communication Equipment
Wireless Base Stations: Used for power systems and signal processing circuits.
Satellite Communication: For filtering and coupling in high-frequency applications.
Household Appliances
Microwaves, Washing Machines: For power filtering and interference suppression.
Lighting Equipment: For filtering in LED driver circuits.
New Energy
Solar Power Systems: Used in solar inverters for filtering and energy storage.
Wind Power: For filtering and harmonic suppression in wind turbine control systems.
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