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Home » FORUM » Capacitor Academy » Basic knowledge
- What should be paid attention to when installing aluminum electrolytic capacitor?[ 2021-01-05 10:27:24 ]
- 1. The installation position of the bolt aluminum electrolytic capacitor during the working period, the aluminum electrolytic capacitor will continue to flow leakage current, resulting in electrolysis. On the one hand, the oxygen produced by electrolysis will regenerate the insulation layer, but on the other hand, the released hydrogen will generate air pressure inside the capacitor. When the air pressure reaches a certain level, the safety valve on the cover plate will release the gas, so as to prevent the explosion of the capacitor due to the high air pressure during overload. In order to prevent electrolyte leakage during gas release, the terminal of capacitor (safety
- Calculation formula of service life of aluminum electrolytic capacitor with bolt[ 2021-01-05 10:19:51 ]
- Electrolytic capacitor service life (also defined as service life and working life) refers to the life that can be achieved when the failure rate of aluminum electrolytic capacitor does not exceed the specified value. The total failure or expected failure variable constitutes the end of service life. Depending on the circuit design, device failure caused by parameter variables does not necessarily mean equipment failure. This means that the actual life of aluminum electrolytic capacitor may be longer than the given service life. The data of service life come from industry experience and accelerated test
- Factors affecting ripple current of aluminum electrolytic capacitors[ 2021-01-05 10:18:53 ]
- 1. When alternating current is affected by pulsating voltage or ripple voltage and flows through equipment, RMS value is used to represent ripple current. The maximum allowable ripple current depends on the ambient temperature, the surface area of the capacitor (such as the heat dissipation area), the loss tangent Tan δ (or ESR) and the AC frequency. As thermal stress plays a decisive role in the life of aluminum electrolytic capacitors, the heat generated by ripple current is an important factor affecting the service life. These heat factors imply that in a particular ring
- Characteristics of leakage current of aluminum electrolytic capacitor[ 2021-01-05 10:01:52 ]
- Due to the special properties of the aluminum oxide layer (which also acts as the insulating layer), even after the DC voltage is applied for a long time, a small current will continue to over flow, which is called leakage current. The smaller the leakage current is, the better the insulation performance is. 1. The time and temperature characteristics of the leakage current are shown in FIG. 15. In the first few minutes when the voltage is applied to the aluminum electrolytic capacitor, there is a strong leakage current, especially when no overvoltage is applied during long-term storage. In continuous work
- Application of aluminum electrolytic capacitor in new energy field[ 2021-01-05 10:00:26 ]
- As a new energy, solar energy can provide clean and pollution-free energy for our life. Because the current generated by photovoltaic power generation system is DC, but the civil power is mainly AC power supply, and solar power generation will eventually move to grid operation, which means that solar power generation must convert DC to AC through inverter to drive household appliances and other loads. Therefore, inverter plays an important role in solar power generation system.
- Aluminum electrolytic capacitor for vehicle ECU is introduced in Japan, which has 4000 hours life at 125 ℃[ 2021-01-05 09:59:46 ]
- Guimigong of Japan has released the "MHL series" of chip aluminum electrolytic capacitors, whose service life is twice longer than that of its previous products. It can work for 2000 or 4000 hours at + 125 ℃, extending the service life of the product to twice that of the previous "MVH series". This product is for the purpose of automobile ECU (electronic control unit), especially for ECU equipped in engine room. According to guimigong, the capacitor used for ECU in engine room is used in the resistance to
