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楼主 |
发表于 2009-6-9 19:11
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谢谢上面几位兄弟. Q; _" {8 k3 A$ G/ g2 V" c
我今天布好线,接上模拟负载,给器具输入额定电压' @+ D/ W _+ }( Y
可大概测试了两个小时,变压器绕组温度一直都在缓慢的升2 ^- \" L& ]0 K
有谁知道变压器(供刮胡刀用)温升要做多久4 {* h2 F' U0 Z6 [5 s$ t
还有我对标准上一句话很不理解% f' ]+ |. w% x
The value of the output current is measured when steady state is established.4 d, C+ \; `* c7 a' H. J
Then the supply voltage is increased by 10 % and the output current is adjusted to the same
8 V9 Z! ]3 c0 P* Y$ p- Dvalue measured before. The output current is not adjusted for independent transformer. After
6 v4 o2 ~# [* N' u( ~this no change is made in the circuit. The test is repeated under no-load condition if this is a3 J" ~1 m! H" M
more unfavourable situation.( s1 x; c$ L! F
电压升高10%,如何保证电流不变?
- b0 k, U6 C/ P6 W, L而且模拟负载我算好了20W,接上去却有24W
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' z* o6 ~, G" R- o1 S+ X这样行吗 |
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