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Increase the internal structure of the rated voltage

Increase the internal structure of the rated voltage

2024-01-05

The voltage ratings for different film materials depend on factors such as film thickness, material quality (free of physical defects and chemical impurities), ambient temperature and operating frequency, and the safety margin for breakdown voltage (dielectric strength). In general, however, the rated voltage of a film capacitor depends primarily on the thickness of the plastic film. For example, with the minimum usable film thickness of a polyester film capacitor (about 0.7 μm), a capacitor rated at 400V DC can be produced. If a higher voltage is required, a thicker plastic film is usually used

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Self-healing of metallized film capacitors

Self-healing of metallized film capacitors

2024-01-05

Metallized film capacitors have self-healing properties that are not available in film/foil configurations. When a sufficient voltage is applied, point defect shorts between the metallized electrodes can evaporate due to the high arc temperature because the dielectric plastic material at the breakdown point and the metallized electrodes around the breakdown point are both very thin (about 0.02 to 0.05 microns). The point defect cause of the short circuit is burned, and the resulting steam pressure also blows the arc away. This process can be completed in less than 10 μs

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Brief Analysis of Fault Treatment of Capacitor

Brief Analysis of Fault Treatment of Capacitor

2024-01-05

When the fuse of the capacitor is blown, it shall be reported to the dispatcher, and the circuit breaker of the capacitor shall be opened after obtaining the approval. Cut off the power supply to discharge it, and conduct external inspection first, such as whether there are flashover marks on the outside of the casing, whether the shell is deformed, whether there is oil leakage and whether there is short circuit in the grounding device, etc., and measure the insulation resistance value between poles and poles to ground, and check whether the capacitor bank wiring is complete and firm, and whether there is phase loss

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Detection method of fixed capacitor

Detection method of fixed capacitor

2024-01-05

1. Detect the small capacitance below 10pF: because the fixed capacitor capacity below 10pF is too small, using a multimeter to measure, can only qualitatively check whether there is leakage, internal short circuit or breakdown. When measuring, a multimeter R× 10k block can be selected, and two pens can be used to connect the two pins of the capacitor arbitrarily, and the resistance value should be infinite. If the measured resistance (pointer swing to the right) is zero, then the capacitor leakage damage or internal breakdown.

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Supercapacitors are also known as electric double-layer capacitors.

Supercapacitors are also known as electric double-layer capacitors.

2024-01-05

Supercapacitor, also known as electric double layer capacitor and electrochemical capacitor, is a new type of electrochemical energy storage device with electrochemical performance between traditional capacitors and batteries. It mainly includes four parts: electrode, electrolyte, current collector and separator. It mainly stores energy through the electric double layer capacitance and the Faraday quasi-capacitance generated by the redox reaction. Generally speaking, the energy storage of supercapacitors is reversible, so it can be used to solve problems such as battery memory. At present, the application range of supercapacitors is very wide.

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Characteristics of Film Materials for Film Capacitors

Characteristics of Film Materials for Film Capacitors

2024-01-05

The electrical characteristics, temperature and frequency characteristics of a film capacitor depend primarily on the type of material forming the capacitor dielectric. The table below lists the most important characteristics of the main plastic film materials used today. The properties of the mixed membrane material are not listed here. The data in this table is taken from specifications published by various manufacturers of film capacitors for industrial electronic applications. A wide range of values for the dissipation factor includes typical and xxx specifications from various manufacturers' data sheets. Typical electrical values for power supplies and large AC capacitors are not included in this table.

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