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4<br />
Q2-5 is all IRF150 or BUZ24 <strong>Power</strong> FET transistors (TO-3) - all placed on heat sink<br />
A<br />
B<br />
C<br />
230V main<br />
F1<br />
Fuse Thermal<br />
T1<br />
F2<br />
Fuse Thermal<br />
T2<br />
S1<br />
26 VAC<br />
F3<br />
5A<br />
21VAC/<strong>40A</strong><br />
R1<br />
VR250<br />
D2<br />
<strong>Power</strong> rectifier on heatsink<br />
D1<br />
B40C<br />
C1<br />
1000uF<br />
R6<br />
3K3<br />
D3<br />
1N4148<br />
D4<br />
1N4148<br />
C2<br />
6 * 10.000uF in parallel<br />
C3<br />
47nF<br />
C4<br />
1uF/25V<br />
Z1<br />
37V<br />
Current limit indication adj.<br />
1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
R2<br />
4k7<br />
NC NC<br />
Cur. lim. Freq. co<br />
Cur. sens e V+<br />
Inv. input Vc<br />
Non inv. inpVout<br />
Vref.<br />
Gnd<br />
IC1<br />
LM723<br />
Vz<br />
NC<br />
14<br />
13<br />
12<br />
11<br />
10<br />
9<br />
8<br />
R3<br />
330<br />
R7<br />
2k2<br />
R4<br />
47<br />
Z6<br />
6.8V<br />
R8<br />
1k5<br />
R5<br />
2k2<br />
LED1<br />
R35<br />
12k<br />
LED2<br />
Current limit indication<br />
C5<br />
100nF<br />
2<br />
1<br />
Q1<br />
BC547<br />
3<br />
R9<br />
1k<br />
R13<br />
2k2<br />
R14<br />
2k2<br />
R15<br />
2k2<br />
R16<br />
2k2<br />
V-reg.<br />
d<br />
R10<br />
2k2<br />
R11<br />
1k<br />
R12<br />
2k2<br />
Q2<br />
g<br />
Q3<br />
Q4<br />
Q5<br />
s<br />
Z2<br />
15V<br />
Z3<br />
15V<br />
Z4<br />
15V<br />
Z5<br />
15V<br />
R17<br />
1k<br />
R18<br />
1k<br />
R19<br />
1k<br />
R20<br />
1k<br />
R30:<br />
R30 can be changed to change<br />
the power supplies current limit<br />
More then 0.65V over R30<br />
results in current limitation.<br />
The power supplies current limit<br />
off cause still depends on the<br />
limits of the transformer T2, the<br />
rectifier D2 and the capacitor<br />
C2!!!<br />
To SCR1 gate<br />
R21<br />
0.1 ohm/5W R25<br />
12k<br />
R22<br />
0.1 ohm/5W R26<br />
12k<br />
R23<br />
0.1 ohm/5W R27<br />
12k<br />
R24<br />
0.1 ohm/5W R28<br />
12k<br />
R30<br />
820 ohm<br />
R31<br />
18k<br />
SCR1<br />
50A<br />
V mtr. reg.<br />
R32<br />
5k<br />
R29<br />
1k<br />
A mtr. reg.<br />
SCR1 is connected directly to the<br />
<strong>Power</strong> Supplies <strong>13.8V</strong> output<br />
connectors<br />
+ <strong>13.8V</strong><br />
C6<br />
500uF/25V<br />
Gnd<br />
Meter<br />
V-/A-meter (1mA)<br />
S2<br />
A<br />
B<br />
C<br />
3<br />
Over voltage protection (14.8V)<br />
Q6<br />
BC557<br />
2<br />
1<br />
D<br />
1<br />
2<br />
R33<br />
1k<br />
R34<br />
1.5k<br />
R36<br />
8.2k<br />
C7<br />
4.7uF<br />
C8<br />
100nF<br />
3<br />
Title<br />
13,8V 30-<strong>40A</strong> <strong>Power</strong> <strong>Supply</strong><br />
Size Number<br />
Revision<br />
A4<br />
Date: 08-02-2006 Sheet 1of<br />
1<br />
File: D:\Drivers and software\..\Diagram.SchDocDrawn By: OZ2BKK<br />
4<br />
1.02<br />
D
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