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|  DSH 1031
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| Crossing of triple insulated winding wire 6 o0 \. s7 k8 o# V
| 2.10.5.12
, A1 d/ O" c8 W; c2 z | 60950-1(ed.2);am1
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& e0 _4 @$ |+ QStandard(s) (incl. year) Subclause(s) No. Year) u- y4 C# ^$ {9 D* C2 \2 m
IEC 60950-1:2005/A1
) E1 \. r4 F& j" Z* q2 `; Q9 R2.10.5.12 DSH
' F. B: b) E; J1 y% @+ Y, n1031# m& j9 g& }/ P: f: B* W$ p3 I
2012
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OFF
" j, ]: }- \8 T; v0 {5 d% oSubject Keywords Developed by Approved at) J( {' u+ l+ a: C( a8 E/ @ p
Crossing of triple A) V; k4 p) N) t0 L& G
insulated winding wire
. X. x0 t6 ~! z+ {-Triple insulated wire: U: T$ z9 O/ U8 v& x2 e/ ?# l
- Mechanical stress
/ c6 a5 A: C. g0 V- g6 N9 ]3 G! L1 }relief
4 u, Y8 f2 V5 x+ p3 r3 L3 W- Physical separation
% W9 N, p) b1 J( c/ EETF2 2012 CTL
/ P% ?' W( \* w2 }' iPlenary
" p: @- {, [7 ?+ v$ WMeeting( |5 T2 u4 a% ]+ `
Question
! w: N7 I R+ e# c8 T" iTransformers in switching mode power supplies often contain triple insulated winding
5 h5 Y6 J6 h& z9 Y2 m* kwire (=TIW) (wire with extruded insulation layers). These windings typically cross
+ H3 Q1 C) k7 i2 `, O8 f2 t6 S% ?each other at an angle between 45° and 90° at the exit points as marked in the
/ W. Z& H2 X. h) [Figure below.& T. A7 B9 [! S* n: h3 T K0 C
In the given example TIW is used for secondary circuit windings, whereas the primary) y# g) W" h: q1 B+ ]
circuit windings are made of enamel coated wire. Distances between the point where
2 x) E. F1 d4 U" ?+ {+ }2 d$ I: aTIW crosses itself and primary circuit winding wire do not comply with Basic4 b; p8 W" u; z9 B. P& U$ R
(respectively Supplementary) Insulation requirements.4 u0 S3 K. j+ P/ W* d3 s
Is it necessary in the given design to provide either mechanical stress relief at the" k/ I% j2 M. b
crossing point(s) of TIW, or an additional insulation level (e.g., Basic
! {' \6 u# B1 z, C W" v(Supplementary)) between the crossing point(s) of TIW and primary circuit parts
; a! g3 F$ H; j8 k: }(winding)?2 V3 N/ [( ]( ]% N1 M+ } }& p
Decision; n) u8 D0 C& K6 j5 V
No2 B" Z8 t6 M: [" t! P; h
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发表于 2012-11-6 17:57
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