Common problem
How to choose high voltage electrolytic capacitors?
Source：本站 | Time：2022-04-11 | Read：517
What is an electrolytic capacitor? What does it do? Electrolytic capacitors are widely used in household appliances and various electronic products, but now they have developed from DC to AC, from low temperature to high temperature, from low voltage to high voltage, from general purpose to special type, from general structure to chip, flat, book type and other structures, so many kinds of electrolytic capacitors, how to choose high voltage electrolytic capacitors?
How to choose high-voltage capacitor
1. We should use the prototype high-voltage electrolytic capacitor as much as possible.
2. Usually, the capacitance error of high-voltage electrolytic capacitor is larger, which will not seriously affect the normal operation of the circuit, so it can be replaced by capacitors with slightly larger or smaller capacity. But not in the crossover circuit, s calibration circuit, vibration circuit and circuit, the electric capacity should be as common as possible with the accounting request. In some filtering networks, black diamond electrolytic capacitors, the capacity of electrolytic capacitors is also requested to be very, the error should be less than ±0.3-0.5.
3. The request of voltage withstand must be satisfied, and the value of voltage withstand chosen should be equal to or greater than the original value.
4. Usually use non-polar electrolytic capacitor to replace, when there is really no way, two polarized capacitors with double capacity can be used in reverse series, by connecting the positive pole of two polarized electrolytic capacitors (or connecting their two negative poles).
5. When using high voltage electrolytic capacitor, use high voltage electrolytic capacitor with high temperature resistance. The high operating temperature of high temperature resistance capacitor is 105℃, and it can ensure the normal operation time of about 2000 hours when it works under the high operating temperature. When the capacitor is used at 80℃ under 50℃, its life span can reach 22,000 hours, and if the high temperature and high voltage electrolytic capacitor is used at this moment, its life span can reach 90,000 hours. The above is the analysis of electrolytic capacitor, hope it can help you.
How to choose high-voltage capacitor
1. We should use the prototype high-voltage electrolytic capacitor as much as possible.
2. Usually, the capacitance error of high-voltage electrolytic capacitor is larger, which will not seriously affect the normal operation of the circuit, so it can be replaced by capacitors with slightly larger or smaller capacity. But not in the crossover circuit, s calibration circuit, vibration circuit and circuit, the electric capacity should be as common as possible with the accounting request. In some filtering networks, black diamond electrolytic capacitors, the capacity of electrolytic capacitors is also requested to be very, the error should be less than ±0.3-0.5.
3. The request of voltage withstand must be satisfied, and the value of voltage withstand chosen should be equal to or greater than the original value.
4. Usually use non-polar electrolytic capacitor to replace, when there is really no way, two polarized capacitors with double capacity can be used in reverse series, by connecting the positive pole of two polarized electrolytic capacitors (or connecting their two negative poles).
5. When using high voltage electrolytic capacitor, use high voltage electrolytic capacitor with high temperature resistance. The high operating temperature of high temperature resistance capacitor is 105℃, and it can ensure the normal operation time of about 2000 hours when it works under the high operating temperature. When the capacitor is used at 80℃ under 50℃, its life span can reach 22,000 hours, and if the high temperature and high voltage electrolytic capacitor is used at this moment, its life span can reach 90,000 hours. The above is the analysis of electrolytic capacitor, hope it can help you.
