[超新手] 出+/- 電要用PARTS?

例如話個CIRCUIT要求+60V/-60V 輸入, 用咩PARTS做到呢對VOLTAGE出來?因為一般DC牛只有 V+/GND 出力

THANKS

DC output +60, -60

Input AC : 220V

Output AC : (X - 1.4) x 1.414  
Assume you are usign full wave rectifier.
1.4 is two diode V drop.
X is the unknown.

By sutitiution, X is around 43V.

You should find 42-0-42  or 42V x 2 transformer.

Remember, you need to calculate the no-load and full load voltage diff. (Regulation)

EI, R-CORE, Trodorial are diff.

KK.Ho

[quote:d0550d00fc="kk_ho"]DC output +60, -60

Input AC : 220V

Output AC : (X - 1.4) x 1.414  
Assume you are usign full wave rectifier.
1.4 is two diode V drop.
X is the unknown.

By sutitiution, X is around 43V.

You should find 42-0-42  or 42V x 2 transformer.

Remember, you need to calculate the no-load and full load voltage diff. (Regulation)

EI, R-CORE, Trodorial are diff.

KK.Ho[/quote]

Let's say i am using regular bridge rectifier (4 diodes with 4 legs), i bet the connection is like

220V "street electricity" - > 42-0-42 transformer -> each output of the transformer (which total of them is 2) to one bridge rectifier> output from 1 rectifier will be the +60 and another -60 -> the two outputs then go to current stabilising currect


am i correct?

Yes, but

(42 -1.4) x 1.414 = 57V.

If you measure the transformer no load condition is 42V AC, I am sure you cannot get 57V with mid loading or full loading.

The no load and full load have some deviation. What kind of P.Tran you are using?

KK