Aluminum foil structure of capacitor | Metallized film capacitor |
a.No self-healing, failure is caused byshort circuit。 | a.Self-healing, failure is open。 |
b.In the working voltage, capacity and good stability。 | b. In the following 300V, volumestability particularly good (300V is the start voltagecontaining air ionization). (300V is the start voltage containing airionization). Within 2000 hours, the capacity loss is less than 1%; 2000 hours,less than 1% capacity loss; More than 300V, volume stability isdepending on the above productiontechnology of 300V, volumestability is depending on the production technology The production technology, goodstability, capacity will increase,production technology, will increase the capacity of stability
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c. Can be used in high-voltage alternating current, each capacitorcan press High voltage 2000VAC production,it must use impregnant high-voltage 2000VAC production, theuse of impregnant , and increase the film thickness. ,and increase the film thickness 。 | c.At present, the working voltage of eachcapacitor to 500VAC。 |
d.No current limit。 | d. Because the metal surface is relatively weakly connected, so thecurrent There are very limited. There arevery limited 。 |
e. High frequency can be used to 10MHz. Again, rolled foil is again high, rolled foil Have effect on the big. Have effecton the big 。 | e. Because of the metal electrode and the influence of the connecting end face, therefore have more The inductance and resistance is large, so only use for low frequency(0.1MHz) inductance and resistance is large, so only use in the low frequency (0.1MHz)
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f. Rated impulse is very high,because the end flange of the foil Head is connected, so the pulse current head is connected, so by pulse large current , to achieve 800V / μ s. , to achieve 800V / μ
| f. Rated impulse low, due to sprayingface / metal electrode Not firm, face more vulnerable. Not firm, face more vulnerable.Therefore, the pulse currentratings, therefore, pulse currentratings Only the 20V / μ s. Only the 20V / μs. Because the thermal effect of pulse current will destroy the end due to thermal effects of pulse current can damage the e Surface is connected, it mustconsider the pulse frequency.Surface is connected, it mustconsider the pulse frequency.
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g.The capacitance is low, usually less than 1 μ . | g.High capacitance can usually from 1 to1000 μ F. |
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