标题: ul697 温升测试defined load [打印本页] 作者: sam_qi 时间: 2013-3-27 09:43 标题: ul697 温升测试defined load 31.6 The defined load referred to in 31.2 is: . f `7 X& K' Q7 oa) The output power load as determined from Figure 31.1 following measurement of the output 5 C5 a3 \- B c8 t; X& spower obtained when load voltage is 85 percent of the open circuit voltage;. h ~9 \/ M# D: x& ]" E
b) The marked rating of the transformer if greater than the output determined as in (a); or 0 N: b3 t- x7 Uc) The marked rating of the transformer if less than the output determined as in (a) and the 8 G' ^1 e1 r) X$ x% r. vtransformer is provided with a protective device that operates when the transformer output & q7 ?$ m) a% _- w1 Fpower is 110 percent of the marked values & w, W3 z* Z. k7 a b0 }' K) g# m$ ], O4 ~4 m6 Q* `. _. _
上述为玩具变压器的UL697温升测试,特定负载的要求.如何理解.如何计算出所带负载. . o9 a1 a% ~2 n) U& e有做过的高手请解惑.谢谢!7 @# \. T4 L( @. v3 T; E8 n