Aluminum Electrolytic Capacitor
Aluminum electrolytic capacitors use oxide films that can be made into anodes by electrolysis as dielectrics. Aluminum is used as the anode metal. Since dielectric films can be made thin, they have dominated the mainstream of large-capacity capacitors. However, there are a few disadvantages, such as poor frequency and temperature characteristics, leakage current, and large dielectric loss.
These electrolytic type capacitors use tantalum for the anode.
Compared to aluminum electrolytic capacitors, they have excellent leakage current, frequency, and temperature characteristics.
Electric Double Layer Capacitor
These capacitors use an organic electrolytic solution and also an electric double layer formed on the surface of an activated carbon electrode as a dielectric. They have a capacitance that is more than 1000 times to 10,000 times greater than aluminum electrolytic capacitors, and they can be used repeatedly for a long period without limitations such as the number of charge/discharge cycles.
These capacitors, which use ceramics as a dielectric, are roughly divided into three types depending on the type of ceramics used: a low dielectric constant type, a high dielectric constant type, and a semiconductor type. One property of ceramic capacitors is that the capacity changes as the voltage is applied. This property appears more prominently with a larger dielectric constant.
Polyester, polypropylene and other films are sandwiched between the electrode foils on both sides, and they are structured into a cylindrical shape. These capacitors are nonpolar, with high insulation resistance and no dielectric loss. In addition, they also have good frequency and temperature characteristics.
These capacitors use mica, which is the best dielectric produced in nature. Although mica capacitors have excellent characteristics such as insulation resistance, dielectric loss tangent, frequency, and temperature characteristics, a disadvantage is that they are expensive.
Related Technical Articles
- What is the role of a Capacitor in Electronic Components? Focusing on the mechanism
- Electric Double-Layer Capacitors are Optimal for Leveling Power
- How to read a Resistor and Capacitor code
- How diodes work and what they are used for! What kind of situations are they used in?
- What is an inductor (coil)? Explaining Its Principle and Role
Matsusada Precision's DC power supplies, high voltage power supplies, and X-ray inspection systems provide the best solutions for capacitor and circuit testing applications worldwide.
List of High Voltage Amplifiers
High Voltage Amplifiers
Pulse Power Supplies
For high voltage evaluation tests of various capacitor
This X-ray CT scanner can be used for internal inspection of capacitors and batteries.