Condensateur à film empilé 15nf

Film capacitors can also be used in a more conventional way as voltage-smoothing capacitors, filters, and audio crossovers. They can be used to store energy and release it in a high-current pulse when needed. High-current electrical pulses are used to power pulsed lasers or generate lighting discharges.

Le diélectrique d'un condensateur à film contrôle plusieurs aspects de l'appareil, notamment sa tension nominale. La tension nominale d'un condensateur peut être augmentée par les fabricants en utilisant des films plus épais et des polymères de meilleure qualité et sans défaut. La disposition des films, la fréquence d'utilisation et les films métallisés (décrits ci-dessous) sont d'autres variables importantes.

En raison de la simplicité intrinsèquement présente dans les procédures de découpe et d'enroulement nécessaires pour les créer, les condensateurs à film peuvent être construits comme de très grands dispositifs. Pour le stockage d'énergie dans les applications à haute tension comme les systèmes d'alimentation électrique et les centrales électriques, ces condensateurs de puissance sont fréquemment utilisés.

Caractéristiques:

1. Construction non inductive et auto-guérison

2. Haute propriété de résistance à l'humidité

3. Super caractéristiques physiques et environnementales

Les caractéristiques d'un condensateur à film empilé 15nF incluent :

1. Small size: Stacked film capacitors have a compact design that makes them ideal for use in high-density circuit boards.
2. Capacité élevée : Avec une capacité de 15nF, ce condensateur peut stocker une quantité importante de charge électrique.
3. Haute fiabilité : les condensateurs à film empilé ont un haut niveau de fiabilité, ce qui en fait un choix populaire pour une utilisation dans une large gamme d'appareils électroniques.
4. Faible absorption diélectrique : ces condensateurs ont un faible facteur d'absorption diélectrique, ce qui signifie qu'ils peuvent se charger et se décharger rapidement sans perdre beaucoup d'énergie.
5. Faible ESR : les condensateurs à film empilé ont une faible résistance série équivalente (ESR), ce qui les rend très efficaces et réduit les pertes d'énergie.
6. Bonne réponse en fréquence : ces condensateurs ont une bonne réponse en fréquence, ce qui les rend adaptés à une utilisation dans des applications haute fréquence.

Film capacitors use two plastic films that have been coated with a very thin layer of aluminum (metalized), which serves as the electrode. The dielectric may be referred to as metal foil or metalized film, depending on the electrode arrangement. Metal foil devices feature a greater resistance to component damage from short circuits, but are typically weaker against surge currents.

Film/foil capacitors or metal foil capacitors are made with two plastic films as the dielectric. Each is layered with a thin metal foil, usually aluminum, as the electrodes. The advantages of this construction type are an easy electrical connection to the metal foil electrodes, and its ability to handle high current surges.
Two metalized films are combined to create metalized film capacitors, while a plastic film serves as the dielectric. One or both sides are covered with an extremely thin ( 0.03 m[2]) vacuum-deposited aluminum metallization that acts as electrodes. Dielectric breakdowns or short circuits between the electrodes may not always result in component damage in this topology, giving it “self-healing” qualities. When compared to film/foil construction, this fundamental design enables the production of high-quality goods such as “zero defect” capacitors and wrapped capacitors with bigger capacitance values (up to 100 F and larger) in smaller cases (high volumetric efficiency). The reduced current surge rating of the metalized structure, however, is a drawback.

Caractéristiques:

Diélectrique : film polypropylène

Électrodes : métal évaporé sous vide ou feuille d'aluminium

Revêtement : Encapsulé dans un boîtier en plastique ignifuge renforcé scellé avec de la résine époxy répondant aux exigences de la norme UL 94V-0

Fils : Fils axiaux en fil étamé

Norme de référence : CEI 384-16 ; GB 10190-1988

Catalogue climatique : 40/85/21

Capacité en fonction de la tension nominale (UR) :

0,001 µF-2,2 µF/100 VCC

0,001 µF-2,2 µF/250 VCC

0,001 µF-2,2 µF/400 VCC

0,001 µF-2,2 µF/630 VCC

Tolérance de capacité : M = ±20 %, K = ±10 % et J = ±5 %

Facteur de dissipation : DF≤1,0 % (à 20 °C, 1 KHz)

Résistant à la tension : 1,6 *UR Unité : VCC (5 s à 20 °C)

Résistance d'isolement : C≤0,33 µF, IR≥30 000 MΩ, C>0,33 µF, IR*C≥5 000 s (1 minute à 20 °C et R≤65 %)

Endurance : 1000 heures avec 125% de la tension nominale à 85°C. Après l'épreuve :

AC/C ≤ 5 % ; ΔDF ≤0.40%, IR ≥50% de la valeur spécifiée (20°C, 1kHz)

Stacked film capacitors are a specialized type of capacitor that offers unique electrical properties and benefits for various applications. Their distinct design, combining multiple layers of thin film, sets them apart from conventional capacitors. In this article, we explore the construction, advantages, and applications of film capacitors.

Construction of Film Capacitors:

Stacked film capacitors are built by layering multiple thin film dielectric materials, often using a winding technique. Each layer is separated by a conductive electrode, creating a sandwich-like structure. The layers are then encapsulated to protect the assembly from external factors such as moisture, dust, and mechanical stress. The choice of dielectric material, electrode material, and layering technique can influence the capacitor’s performance characteristics.

Advantages of Stacked Film Capacitors:

• High Capacitance Density: Film capacitors can achieve high capacitance values within a compact form factor. This makes them suitable for applications where space constraints are a concern.

• Low ESR and ESL: Stacked film capacitors exhibit low Equivalent Series Resistance (ESR) and Equivalent Series Inductance (ESL), resulting in efficient energy storage and discharge, as well as minimal energy loss.

• Stable Performance: The layered construction contributes to improved capacitance stability over a wide range of frequencies and temperatures. This stability is vital for maintaining consistent circuit performance.

• Low Noise: Stacked film capacitors’ low ESL and ESR, combined with their stable characteristics, make them well-suited for applications that require minimal noise interference.

• High Voltage Tolerance: Some film capacitors are designed to withstand high voltage levels, making them suitable for demanding applications that require voltage regulation and energy storage.

Applications of Stacked Film Capacitors:

• Power Electronics: Stacked film capacitors are commonly used in power electronic circuits for filtering, voltage regulation, and energy storage. Their stable performance and low losses contribute to efficient power conversion.

• Pulse Power Systems: These capacitors find applications in pulse power systems, where they store and discharge energy quickly and efficiently, as required in applications such as pulsed lasers and electromagnetic pulse generators.

• High-Frequency Circuits: Stacked film capacitors’ low ESL and ESR characteristics make them ideal for high-frequency applications, including RF filters, impedance-matching networks, and communication systems.

• Medical Devices: In medical devices that require reliable energy storage and quick discharges, film capacitors play a role in defibrillators, medical imaging equipment, and laser-based therapies.

• Automotive Electronics: Stacked film capacitors contribute to automotive electronics, such as electric vehicle powertrains, engine control units, and safety systems, due to their stability and efficiency.

Advancements and Future Prospects:

The field of stacked film capacitors is not static; ongoing research and innovation continue to push the boundaries of their capabilities and applications. Advancements in materials, manufacturing techniques, and design methodologies are contributing to the evolution of film capacitors:

• Material Innovations: Researchers are exploring new dielectric materials that offer improved performance characteristics, such as higher capacitance, lower losses, and enhanced stability over a broader range of temperatures and frequencies.

• Miniaturization: As technology trends toward miniaturization, efforts are being made to further reduce the size of stacked film capacitors without sacrificing performance. This is especially important for portable electronics and space-constrained applications.

• Energy Storage Systems: With the growing demand for efficient energy storage solutions, film capacitors are being integrated into advanced energy storage systems. Their rapid charge and discharge capabilities make them valuable in applications such as hybrid and electric vehicles, renewable energy systems, and grid stabilization.

• Integration with Silicon: Stacked film capacitors are being explored for integration with silicon-based components, enabling the creation of compact and high-performance microelectronic systems with integrated power storage.

• High-Frequency Applications: As wireless communication systems and high-frequency technologies advance, film capacitors are finding new roles in enabling efficient signal processing, filtering, and impedance matching.

• Reliability and Durability: Research is ongoing to enhance the reliability and durability of stacked film capacitors under various operating conditions, ensuring consistent performance over the product’s lifetime.

Stacked film capacitors, with their innovative layered construction, offer a range of benefits that cater to diverse application needs. Their high capacitance density, low losses, and stable performance make them valuable components in various industries, from power electronics to medical devices. As technology continues to evolve, film capacitors are poised to play an even more significant role in enabling efficient energy storage, power conversion, and reliable circuit performance. It’s important to choose the right stacked film capacitor for each application, considering factors such as capacitance requirements, voltage ratings, and environmental conditions. By harnessing the advantages of stacked film capacitors, engineers can elevate the performance and efficiency of their designs in a multitude of electronic applications.