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Importance of Capacitance Parameters
Source：本站 | Time：2022-02-25 | Read：304
When buying capacitors, you need to pay attention to not only the choice of brand, not only the choice of capacitor type. More than that, you should pay attention to the capacitor parameters, only to meet the capacitor parameters to meet the actual needs. After all, the capacitors used in each different environment and equipment are different. The next easy capacitor will be for
When purchasing capacitors, you need to pay attention not only to the choice of brand, not only to the choice of capacitor type. More than that, we should pay attention to the capacitor parameters, only to meet the actual needs of the capacitor parameters. After all, the capacitors used in each different environment and equipment are different. Next, Easy Rong will introduce the capacitor parameters in detail.
The main characteristic parameters of capacitors are nominal capacity and allowable deviation, which means the capacity marked on the capacitor. The deviation between the actual capacitance and the nominal capacitance is called error, and the deviation range allowed is called precision.
Accuracy level and allowable error correspondence: 00 (01) - ± 1 [%], 0 (02) - ± 2 [%], Ⅰ - ± 5 [%], Ⅱ - ± 10 [%], Ⅲ - ± 20 [%], Ⅳ - (+20 [%] - 10 [%]), Ⅴ - (+50 [%] - 20 [%]), VI - (+50 [%] - 30 [%])
Generally capacitors are commonly used with Ⅰ, Ⅱ, Ⅲ, and electrolytic capacitors with Ⅳ, Ⅴ, Ⅵ, selected according to the usage.2. Rated voltage The highest DC voltage RMS value that can be continuously added to the capacitor at the lowest ambient temperature and rated ambient temperature, usually marked directly on the capacitor case, if the working voltage exceeds the withstand voltage of the capacitor, the capacitor breaks down and causes irreparable and permanent damage.3. Insulation resistance DC voltage is added to the capacitor, and the leakage current is generated, the ratio of the two is called insulation resistance.
When the capacitance is small, it mainly depends on the surface state of the capacitor, when the capacity is 〉0.1uf, it mainly depends on the performance of the dielectric, and the larger the insulation resistance, the better.
Time constant of capacitance: The time constant is introduced to properly evaluate the insulation of large capacity capacitor, and it is equal to the product of insulation resistance and capacity of capacitor. And for the loss is also a parameter that must be paid attention to. The energy consumed by the capacitor due to heating in unit time under the action of electric field is called loss. Each type of capacitor has specified its allowable loss in a certain frequency range. The loss of capacitor is mainly caused by dielectric loss, conductance loss and the resistance of all metal parts of capacitor.?
When purchasing capacitors, it is necessary to know about the capacitor parameters. For capacitor parameters, different parameters represent different meanings. If even the most basic signs are not readable, it is inevitable that wrong choices will be made in the selection, and even many effects will be caused by improper choices.
When purchasing capacitors, you need to pay attention not only to the choice of brand, not only to the choice of capacitor type. More than that, we should pay attention to the capacitor parameters, only to meet the actual needs of the capacitor parameters. After all, the capacitors used in each different environment and equipment are different. Next, Easy Rong will introduce the capacitor parameters in detail.
The main characteristic parameters of capacitors are nominal capacity and allowable deviation, which means the capacity marked on the capacitor. The deviation between the actual capacitance and the nominal capacitance is called error, and the deviation range allowed is called precision.
Accuracy level and allowable error correspondence: 00 (01) - ± 1 [%], 0 (02) - ± 2 [%], Ⅰ - ± 5 [%], Ⅱ - ± 10 [%], Ⅲ - ± 20 [%], Ⅳ - (+20 [%] - 10 [%]), Ⅴ - (+50 [%] - 20 [%]), VI - (+50 [%] - 30 [%])
Generally capacitors are commonly used with Ⅰ, Ⅱ, Ⅲ, and electrolytic capacitors with Ⅳ, Ⅴ, Ⅵ, selected according to the usage.2. Rated voltage The highest DC voltage RMS value that can be continuously added to the capacitor at the lowest ambient temperature and rated ambient temperature, usually marked directly on the capacitor case, if the working voltage exceeds the withstand voltage of the capacitor, the capacitor breaks down and causes irreparable and permanent damage.3. Insulation resistance DC voltage is added to the capacitor, and the leakage current is generated, the ratio of the two is called insulation resistance.
When the capacitance is small, it mainly depends on the surface state of the capacitor, when the capacity is 〉0.1uf, it mainly depends on the performance of the dielectric, and the larger the insulation resistance, the better.
Time constant of capacitance: The time constant is introduced to properly evaluate the insulation of large capacity capacitor, and it is equal to the product of insulation resistance and capacity of capacitor. And for the loss is also a parameter that must be paid attention to. The energy consumed by the capacitor due to heating in unit time under the action of electric field is called loss. Each type of capacitor has specified its allowable loss in a certain frequency range. The loss of capacitor is mainly caused by dielectric loss, conductance loss and the resistance of all metal parts of capacitor.?
When purchasing capacitors, it is necessary to know about the capacitor parameters. For capacitor parameters, different parameters represent different meanings. If even the most basic signs are not readable, it is inevitable that wrong choices will be made in the selection, and even many effects will be caused by improper choices.
