power supply regulatable 0-28V 20Amp By LM317 and 2N3055

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Power supply regulatable 0-28V 20Amp
Part list for 20 Ampere regulatable power supply:

Click to View Circuit and Read Detail more

2 x 15 volt 20+- amps
D1…D4= Bridge rectifier MB2504 (25 amps cooled)
or eight BYW29 8 amp diodes (TO220 pinning cooled)
or 8 x MR750 (MR7510) diodes (MR750 = 6 Ampere diode) or 16 x 1N5401 (1N5408) diodes.
F1 = 2 Amp
F2 = 25 amp
R1 2k2 2,5 Watt
R2 240 ohm
R3,R4,R5,R6 0.1 ohm 10 watt
R7 6k8
R8 10k
R9 47 Ohm 1 watt
S2 mini switch
R10 8k2
C1,C7,C9 47nF
C2 four times 4700uF/50v or one 22000uF/50v
C3,C5 10uF/50v
C4,C6,C9 100nF
C8 330uF/50v
C10 1uF/16v
D5 1N4151
D6 1N5401
D10 MR750
D11 LED
D7, D8, D9 1N4001
IC1 LM317
Two 2N3055 transistors
P1 5k
P3 10k trimmer
relay = 30 volts AC, 2×10 amp switching

S2 switches between +- 3 Amps and full output current

The relay is used to switch off the power supply voltage when the mains (S1) are/is switched off. So no delay do to the discharge of C2, and so preventing output voltages from not return to zero immediately.

Read More Source :
http://users.belgacom.net/hamradio/schemas/
6-20amps_regulatable_powersupplies_on6mu.htm
Thank you.

This entry was posted on Friday, August 10th, 2007 at 1:49 pm and is filed under LM317, Power supply, Variable Regulator, high current power supply. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.