Reliable Film Capacitor Manufacturer
Types of Film Capacitors We Made
DC Link Capacitor
It is a crucial component in power electronic systems, particularly in converters and inverters. It acts as an energy storage element within the DC link, which is the intermediate stage between the input and output stages of the converter.
AC Filter Capacitor
An AC filter capacitor is a crucial component in power electronics and electrical systems, primarily used to improve power quality by minimizing harmonic distortion in the AC power supply.
IGBT/GTO Snubber Capacitor
In power electronic circuits employing IGBTs (Insulated Gate Bipolar Transistors) or GTOs (Gate Turn-Off Thyristors), snubber capacitors play a critical role in ensuring reliable and efficient operation.
Resonance Capacitor
It is a capacitor that plays a key role in resonant circuits (including series resonant and parallel resonant circuits). In a series resonant circuit, when the reactance values of the inductor and capacitor are equal, the circuit resonates.
Induction Heating Capacitor
During the induction heating process, it plays the role of storing and releasing electrical energy and adjusting circuit parameters to meet the requirements of the induction heating system for energy conversion and power factor.
Current Sensor
A current sensor is a device that measures the flow of electric current in a conductor.Current sensors are essential components in a wide range of applications, enabling accurate current measurement, improved system performance, and enhanced safety.
Formidable Technical Strength
First-Class Quality, and Superior Service
Experience
Having accumulated more than 12 years of professional production know-how.
Inventory
Possessing a substantial inventory, we have established long-term cooperative partnerships with numerous enterprises both at home and abroad.
Product
Product quality. Appearance. Strictly control, fine for each customer to solve the problem on the product
Film Capacitor Manufacturing Process
1.Film Stretching:Thin plastic film (e.g., polypropylene) is stretched biaxially to achieve the desired thickness and dielectric properties. This process significantly increases the film’s dielectric strength.
2.Metallization:In a vacuum chamber, the film is coated with a thin layer of metal (typically aluminum) via a process called evaporation.
3.Film Slitting:The metallized film is slit into narrow strips according to the required capacitor size.
4.Winding:Two metallized films are wound together, slightly offset, to create the capacitor element.
5.Flattening:The wound capacitor is flattened to minimize its footprint and reduce production costs.
6.Terminal Application:Metal contacts (terminals) are applied to the exposed metal layers using a process called “schoopage,” where molten metal is sprayed onto the windings.
7.Healing:A controlled voltage is applied to “burn out” any microscopic defects in the dielectric film.
8.Impregnation:The capacitor is impregnated with an insulating fluid (like silicone oil) to enhance moisture resistance and improve performance.
9.Terminal Attachment:Leads are attached to the terminals of the capacitor.
10.Encapsulation:The capacitor is encased in a protective housing or coated with a protective material.
11.Electrical Testing:100% of capacitors undergo rigorous electrical testing to ensure they meet specifications for capacitance, dissipation factor, and impedance.
This multi-step process ensures the production of high-quality film capacitors with consistent performance and reliability.
Applications of Film Capacitor
Household Appliances
Film capacitors play a vital role in the proper functioning of various household appliances. Their unique electrical properties such as high stability, low loss, and wide temperature range compatibility make them suitable for a diverse range of applications.
New Energy
Film capacitors are essential components in the growing renewable energy sector, enabling the efficient and reliable operation of various systems, from solar and wind power generation to electric vehicle propulsion.
Artificial Intelligence
Film capacitors play a supporting role in the overall reliability and performance of AI systems. Their ability to filter noise, stabilize power, and improve signal quality contributes to the accurate and efficient operation of these complex systems.
Charging Piles
By incorporating film capacitors into the design of EV charging stations, engineers can improve efficiency, reliability, and overall performance, contributing to the widespread adoption of electric vehicles.
Why Choose Us as Capacitor Supplier
Professional and Advanced Equipment
With more than ten years of experience in product manufacturing. Professional technicians provide you with professional advice. Advanced equipment creates high-quality products for you.
Low Price and High Quality
Arrange from design, material, processing, delivery time, quality inspection and transportation. Reduce any additional costs throughout the process.
Fast and Convenient Delivery
Fast production, early delivery, reliable logistics, can provide door-to-door service. Various transportation modes meet different countries.
Best After-sales Service Provided
Improve product sales and technical after-sales service. 24 hours online video call, actively solve problems for customers
After-Sales Support
1. Help Desk and Technical Support Services
Such after-sales support may come free with the purchase of an item and may also be sold as part of a more comprehensive service plan, such as how Best Buy Co. sells Geek Squad computer-related service plans.1 Service offered through a help or support desk may include technical assistance for personal computers, mobile phones, software, machinery and a variety of other products.
2. Real-Time Online Support
Real-time online support includes email, chat, forums, and a social media interface (and monitoring) that assists in responding to public complaints and criticisms. This may include handling returns or repairs.
3. Automated Customer Service Lines
Automated customer service lines can give advice and solutions to frequent or even more complex issues and questions. Typically, rather than employing more human customer service representatives, automated responses and bots allow customers to easily access support at any time, either by phone or online.
4. Automated Support Resources
This may include easily-accessible online solutions that involve forums where customers may interact with other users or experts, post questions, or search for answers.
Film Capacitor FAQs
What are the main characteristics of film capacitors?
Film capacitors have the characteristics of non-polarity, high insulation impedance, excellent frequency characteristics, low dielectric loss, and long life. Its capacitance value is stable and changes little over time and environment; its temperature coefficient is small and it can work stably in a wide temperature range; its operating voltage range is wide and it can be applied to circuits with various voltage requirements.
What are the common classifications of film capacitors?
According to usage, there are mainly polypropylene film capacitors (CBB capacitors) and polyester film capacitors (CL capacitors). According to electrode type, they can be divided into metal foil electrode type and metallized electrode type. In addition, they can also be divided into polyethylene capacitors, polystyrene capacitors, polycarbonate capacitors, etc. according to the material of the film.
In what fields are film capacitors mainly used?
Film capacitors are widely used in electronics, home appliances, communications, electricity, electrified railways, hybrid vehicles, wind power generation, solar power generation and other industries. In electronic equipment, they are often used for signal interconnection, power supply noise bypass, etc.; in new energy vehicles, they are used in energy recovery systems, electric drive systems, on-board charging systems, etc.; in power electronic equipment, they can be used for DC filtering, support circuits, etc.
How to choose a suitable film capacitor?
You need to consider factors such as capacitance value, rated voltage, operating temperature range, size, frequency characteristics, ESR value, etc. According to the specific circuit requirements, such as filtering, coupling, bypassing, etc., select a film capacitor with corresponding characteristics. At the same time, you should also refer to the specification sheet and application guide provided by the manufacturer to ensure that the selected capacitor can meet the actual application requirements.
How long is the life of film capacitors?
The life of film capacitors depends on many factors, such as usage conditions, operating frequency, operating temperature, voltage, etc. Generally speaking, a good film capacitor can work for thousands of hours or more, but if used in a harsh environment or beyond its rated conditions, the lifespan may be significantly shortened.
What is the self-healing property of film capacitors?
Metallized film capacitors have self-healing properties. When the film dielectric has defects at a certain point and a breakdown short circuit occurs under the action of overvoltage, the metallized layer at the breakdown point can instantly melt and evaporate under the action of the arc to form a very small metal-free area, so that the two poles of the capacitor are insulated from each other again and can continue to work, greatly improving the reliability of the capacitor.
What Our Customers Say Us
We have been using Rongfeng’s film capacitors in the production of electronic equipment for some time and are very satisfied. Its excellent frequency characteristics make signal transmission more stable and accurate, effectively improving the performance of our products. Moreover, the product quality is reliable and there has been no failure so far, which greatly reduces our after-sales maintenance costs. It is a trustworthy electronic component!
Choosing Rongfeng’s film capacitors is a wise move for us. In the research and development of new energy vehicles, this capacitor has shown good stability and heat resistance, and can work stably even in complex and changeable vehicle environments. Its precise capacitance value and excellent anti-interference ability play a key role in the optimization of our power system and electronic control system. It is highly recommended to peers!
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