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发表于 2008-4-8 10:02
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引用第27楼0321于2008-04-03 15:43发表的 :
- `4 o( Q; P( |" i: {5 }& @[quote]引用第25楼hunhunli于2008-04-03 10:52发表的 :& V: u4 @0 T/ O* T
那标称为110-240V 25W的又该如何计算?还有其功率远小于25W的该如何测试?(电压加到300V了功率也还小于25W)
5 R. z$ ^" b2 C, o电热器具功率升不到应有值11章里的1.15倍该怎么办啊[/quot
4 z3 x, t9 m( `/ J. x你说的那种应该是带PTC发热 元件的,你看下第5.13章节,
3 y& @: [2 p+ ~ f3 K; J2 G; W.......
0 W& n0 d, F9 [- j+ L, b( L比如说带PTC发热的器具,220-240V, 2400W. 在230V稳定下测量的功率小于2400W. 那么在做11.7的时候系数该用 √1.15 x 240V = 257.4V ? . g2 H$ Q" s8 a4 X }0 C+ Z
根据5.13: The test for appliances with PTC heating elements are carried out at a voltage corresponding to the specified power input. When a power input greater than the rated power input is specified, the factor for multipluing the voltage is equal to the square root of the factor for mutiplying the power input. |
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