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Y 電容特性
6 [5 p" b! G0 a% ~8 s$ U- BThis use of a Y-type capacitor requires that the capacitor have the following qualities:( U- u( S" N4 k6 y
- Very high breakdown voltage, so the capacitor case can end up being quite large.
- Larger capacitance value than the winding-to-winding capacitance of the transformer.$ g2 _7 \4 U' Q! f1 y+ M+ w
' n; t! z, o; y/ I$ y4 r' VThe capacitance value is not always very large, typically being only on the order of nF. The capacitance value represents a trade-off when we start to look at noise control versus safety, the latter of which relates to leakage current.
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1 B- N# U8 l( a1 }' d圖示說明
! _; ?9 F/ l8 g. WThe Y-type capacitor in this circuit (C13) bridges the primary and secondary grounds.2 X v3 I9 g3 s d1 E
3 G. `6 j1 X- }7 K
) C/ Z* L- ^" k1 F8 r8 L+ \, u7 u1 ?8 c* D9 f* s5 |" }& ]/ f* N
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发表于 2008-4-7 13:59
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发表于 2024-9-13 19:18
