标题: 发热类产品测温升 [打印本页] 作者: cmk1991 时间: 2017-7-7 11:43 标题: 发热类产品测温升 发热类产品测温升时，标的220-240V电压，测试19,2时候，用0,85*（220/230）平方*功率， 1,24*(240/230)平方*功率，这个公式是怎么来的呢，有标准依据吗？" M# [. ]. v. t% T8 _0 J 作者: vcgtrf 时间: 2017-7-7 11:57
欧姆定理作者: baicaizfl 时间: 2017-7-7 13:14
这个计算公式的前提是产品标称额定电压范围，额定功率是额定电压范围内的平均电压对应的功率。标准依据见IEC 60335-1条款5.8.4。另外，19.2要求0.85倍，19.3要求1.24倍。 ! Y0 u1 {2 Q3 B2 ~$ n8 s5.8.4 For appliances marked with a rated voltage range and rated power input corresponding to the mean of the rated voltage range, when it is specified that the power input is equal to rated power input multiplied by a factor, the appliance is operated at 8 p# B! V* s4 @% u– the calculated power input corresponding to the upper limit of the rated voltage range multiplied by this factor, if greater than 1; # l4 q" E" n$ q+ j. V– the calculated power input corresponding to the lower limit of the rated voltage range multiplied by this factor, if smaller than 1.. n! ?" _% e( G5 k1 L' Z+ X
When a factor is not specified, the power input corresponds to the power input at the most unfavourable voltage within the rated voltage range.作者: ylgc123 时间: 2017-7-7 13:30
通标5.8.4写的很明白~作者: tienwei2005 时间: 2017-7-8 13:30
