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: . Y7 O* F* O8 M& na) The output power load as determined from Figure 31.1 following measurement of the output$ L% }( m7 s& N$ J2 L
power obtained when load voltage is 85 percent of the open circuit voltage; 3 ~7 ^$ z; v2 ?/ p$ Ub) The marked rating of the transformer if greater than the output determined as in (a); or, y* `3 Z) o/ o1 b9 `9 s
c) The marked rating of the transformer if less than the output determined as in (a) and the# o5 b' L$ L0 a3 |6 Z
transformer is provided with a protective device that operates when the transformer output! R- d. w# h" [, q
power is 110 percent of the marked values ( ]/ p6 W- R. |3 c) o$ U& L1 e; F4 s# e8 C3 o
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.9 U. |$ A+ Y7 j$ K) u" I
有做过的高手请解惑.谢谢!6 t" J2 ]8 p0 o- t