The basic knowledge of electrical and electronic capacitors
Source：http://www.kehong88.comRelease time：2017-01-23 08:57:02Views：
All active devices require electricity for activation, and the capacitor is equal to the total charge. Where the insulation is separated by the combination of two conductors called the capacitor. Denoted by the letter C, the unit is Farah, with F said.
Here, 1F = 1000000 μF = 106 μF = 1012 μF
The main indicators are capacitance and voltage, such as 2.5μF / 450V.
Types of mica capacitors, ceramic capacitors, electrolytic capacitors and paper capacitors.
In general, ceramic capacitors used in high-frequency circuit, the motor's starting capacitor is mainly used electrolytic capacitors.
Measuring capacitance, the multimeter probe pen directly on the capacitor on the two terminals, the digital form can directly read the capacity of the capacitor. Measure with the pointer table, use the multimeter resistance file, and the resistance profile is set to the maximum range, if the pointer deflection angle, and then gradually return to the initial position (∞ position), indicating that the capacitor is good. If you can not return to the ∞ position, then the meter head refers to the resistance is leakage resistance, the general leakage resistance of the capacitor is great, usually tens to hundreds of megohms. Measurement of 0.01μ above the large capacitor, with a multimeter RX10K file, as long as the table head pointer swing is small or not beating, you can determine the capacitor is open.
Capacitor capacity is different from the angle of the pointer deflection is also different.
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