Cbb81 capacitor is a kind of high voltage film capacitors made by using ceramic material as the medium, coating a layer of metal film on the ceramic surface, and then firing the structure seat electrode at high temperatures. It is generally used in high-stability oscillating circuits and is suitable for high-voltage bypass Coupling circuits.
Although they can be employed in circuits that enhance voltage, capacitors don’t really do so. The Back EMF (Counter Electromotive Force), which is produced by the motor rather than the high voltage film capacitors, is frequently larger than the line voltage across a capacitor.
This is not to say that more is better, as a huge capacitor may result in increased energy usage. The motor’s lifespan will be decreased in either situation—whether it is too large or too small—due to overheated motor windings.
Feature of high voltage film capacitors:
1.High stability of capacitance and DF versus temperature and frequency
2.High voltage and long-term ability
3.High pulse rise rate(du/dt) and suitable for large current circuit
Advantages of high voltage film capacitor
High voltage film capacitors offer several advantages in various applications. Here are some of the key benefits:
- Voltage Handling Capability: High voltage film capacitors are specifically designed to handle higher voltage levels compared to standard capacitors. They have higher voltage ratings, allowing them to withstand and operate reliably under elevated voltages.
- Electrical Performance: These capacitors exhibit excellent electrical performance characteristics, including low equivalent series resistance (ESR) and equivalent series inductance (ESL). This leads to lower power losses and improved efficiency in applications where high voltage and low losses are essential.
- Energy Storage: High voltage film capacitors have a larger capacitance value, enabling them to store more energy. This makes them suitable for applications that require significant energy storage and release, such as in power electronics, pulsed power systems, and energy storage applications.
- High Insulation Resistance: High voltage film capacitors are designed with high-quality dielectric materials that offer superior insulation resistance. This ensures reliable operation and prevents leakage or breakdown even at high voltage levels.
- Self-Healing Properties: Many high voltage film capacitors are designed with self-healing properties. If the dielectric material suffers a localized breakdown due to a voltage spike or other factors, the capacitor can recover and continue functioning, minimizing the risk of complete failure.
- High Reliability: High voltage film capacitors are known for their reliability and long operational life. They are designed and manufactured using robust materials and construction techniques, making them suitable for demanding applications and harsh environments.
- Low Dielectric Absorption: High voltage film capacitors typically have low dielectric absorption characteristics. This means they can quickly discharge and recharge without significant delays, making them suitable for applications that require rapid switching or pulse operation.
- Compact Size: High voltage film capacitors can offer high capacitance values within a relatively compact size. This allows for space-saving designs in applications where size constraints are a consideration.
These advantages make high voltage film capacitors well-suited for a wide range of applications, including power electronics, electric vehicles, renewable energy systems, industrial equipment, and more. However, it is important to carefully select the appropriate capacitor type, voltage rating, capacitance, and other specifications to ensure compatibility with the specific application requirements.
Application of high voltage film capacitors
High voltage film capacitors find applications in various industries and electronic systems that require the handling of elevated voltage levels. Here are some common applications where high voltage film capacitors are used:
- Power Electronics: High voltage film capacitors are extensively used in power electronic systems, including inverters, converters, motor drives, and high-voltage power supplies. They help in energy storage, voltage smoothing, filtering, and decoupling applications.
- Pulsed Power Systems: Capacitors with high voltage ratings are crucial in pulsed power systems, such as pulsed lasers, electromagnetic forming, particle accelerators, and pulsed power supplies. They store and discharge energy rapidly, delivering short bursts of high power.
- Electric Vehicles: High voltage film capacitors are employed in electric vehicle (EV) systems, especially in EV charging infrastructure and onboard charging systems. They help manage high voltage levels, energy storage, and power delivery in EV charging stations and onboard charging units.
- Renewable Energy Systems: Capacitors with high voltage ratings play a significant role in renewable energy systems, such as solar inverters, wind power converters, and energy storage systems. They support power conditioning, voltage regulation, and energy storage functions.
- High Voltage Testing and Measurement: High voltage film capacitors are used in high voltage testing equipment, insulation testing, and high voltage measurement systems. They provide stability, precision, and reliability in generating and measuring high voltage levels.
- Industrial Equipment: High voltage film capacitors are employed in various industrial applications, including high voltage power supplies, industrial automation systems, and high voltage motor control. They assist in energy storage, filtering, and power factor correction.
- Medical Equipment: Capacitors with high voltage ratings are used in medical devices that require high voltage power supplies, such as X-ray systems, medical imaging equipment, and therapeutic devices. They aid in power conditioning and energy delivery.
- Research and Scientific Applications: High voltage film capacitors are utilized in research laboratories, scientific experiments, and specialized equipment that involve high voltage generation, particle acceleration, plasma research, and high-energy physics.
It’s important to note that the specific application requirements, such as voltage rating, capacitance, size, and temperature range, will determine the suitable type of high voltage film capacitor to be used. Consulting with experts or referring to manufacturer specifications is recommended to ensure proper capacitor selection for a particular application.
Application:
1.Most suitable for high voltage film capacitors and pluse in the horizontal resonance circuit of colour TV set
Grid managers and major industrial power consumers, who confront various network issues, must take power quality into account. The integration of renewable production (such as wind and solar) and providing voltage support during unforeseen network events are crucial in producing efficient and dependable networks, and grid operators are tasked with avoiding losses over long transmission lines. In order to obtain an electrical supply, large industrial power users must achieve contractual requirements relating to power factor and harmonic distortion as well as decrease operational costs.
★HIGH QUALITY: All products are tested for stability, consistency, and reliability. Ensure product excellence.
★HIGH-CAPACITANCE CAPACITORS: Monolithic ceramic capacitors are compact and offer high-capacitance capacitors.
★APPLICANCE: Widely used in electronic accurate instruments, and various small electronic equipment for resonance, coupling, filtering, and bypass.
How to choose high voltage film capacitors
Choosing the right high voltage film capacitor is essential to ensure the reliable and efficient operation of your electronic or electrical system. Here are the key steps and considerations to help you make an informed choice:
1. Determine Voltage Requirements:
- Identify the required voltage rating for your application. High voltage film capacitors are designed to handle a wide range of voltages, so it’s crucial to select one with a voltage rating that exceeds the maximum voltage your circuit or system will encounter. Ensure a safety margin to prevent overvoltage stress, which can lead to capacitor failure.
2. Define Capacitance Value:
- Determine the required capacitance value (measured in farads or microfarads) for your application. The choice of capacitance depends on the specific function of the capacitor within your circuit. For filtering and energy storage, larger capacitance values may be needed, while signal coupling or timing applications might require smaller values.
3. Consider Dielectric Material:
- High voltage film capacitors primarily use polypropylene as the dielectric material due to its excellent characteristics. However, there are other dielectric materials like polyester, polycarbonate, and PTFE (Teflon) used in high voltage capacitors. Choose the dielectric material that best suits your application’s electrical and environmental requirements.
4. Evaluate Tolerance and Stability:
- High voltage film capacitors typically come with a specified tolerance, which indicates the allowable variation in capacitance from the nominal value. Standard tolerances include ±5% and ±10%. Consider whether a tighter tolerance is necessary for your application, especially if precision is critical.
5. Determine Temperature Range:
- Assess the operating temperature range of your application. High voltage film capacitors are designed to operate within specific temperature limits, usually between -40°C and +85°C. If your application operates in extreme temperatures, consider capacitors with extended temperature ranges.
6. Review Frequency and Ripple Requirements:
- Understand the frequency and ripple requirements of your circuit. High voltage film capacitors have specific characteristics that make them suitable for different frequency ranges. Ensure that the chosen capacitor can handle the frequency and ripple current associated with your application.
7. Consider Self-Healing Properties:
- High voltage film capacitors are known for their self-healing properties, which allow them to recover from partial dielectric breakdown. This feature can significantly enhance the capacitor’s reliability in high-stress environments.
8. Examine Mounting and Packaging Options:
- Determine the physical dimensions and mounting requirements of your capacitor. High voltage film capacitors come in various shapes and sizes, including axial and radial leads. Ensure that the chosen capacitor can be conveniently integrated into your system.
9. Check for Safety Certifications:
- If your application has safety or regulatory requirements, ensure that the chosen high voltage film capacitor meets relevant safety standards and certifications, such as UL (Underwriters Laboratories) or CE (Conformité Européenne).
10. Compare Brands and Manufacturers:
- Research and compare different capacitor manufacturers and brands. Look for reputable companies known for producing high-quality components. Customer reviews, industry reputation, and warranty terms can be valuable indicators of reliability.，
