|
|
楼主 |
发表于 2011-6-9 16:05
|
显示全部楼层
仔细看Annex C 中的C.1 overload test,
5 L9 n7 ~' a, j& M1 n) RC.1 Overload test
. ]4 a' d+ k" q0 {' o% IIf the tests in this clause are conducted under simulated conditions on the bench, these
6 ?" ^$ t2 N$ i- O( K! Gconditions shall include any protection device that would protect the transformer in the
: H% t, R$ ^% P4 ~! V5 Icomplete equipment.# o' \) Q8 ]5 \ f0 w+ s
Transformers for switch mode power supply units are tested in the complete power supply unit
' ~3 D4 v8 U( ~ Wor in the complete equipment. Test loads are applied to the output of the power supply unit.5 }8 o/ Y* r2 L+ \) j
A linear transformer or a ferro-resonant transformer has each secondary winding loaded in
; @7 x# u7 P" o1 r: ]% sturn, with any other secondaries loaded between zero and their specified maxima to result in
2 c% e9 P. L2 ~ p7 N2 nthe maximum heating effect.9 o: D1 N. j; f8 ]1 O* Y
The output of a switch mode power supply unit is loaded to result in the maximum heating. x! m% a0 Z: J, ~; A5 ^" c
effect in the transformer.
% E1 M* I* T! R+ \' B) gNOTE For examples of loading to give the maximum heating effect, see Annex X.
. N) l+ B3 y7 K3 ]3 V mWhere an overload cannot occur or is unlikely to create a hazard, the above tests are not% ?2 D0 U7 |, p% [8 M) x3 {; X: J
made.
* W: f5 B0 r4 n/ g. r- ?0 t最后这句话：Where an overload cannot occur or is unlikely to create a hazard, the above tests are not made.2 j: c- v; U3 U- W v! V9 K
我觉得可以作为不用做过载的依据。 |
|
/1 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
显身卡
发表于 2011-6-9 15:56
