LTSpice simulation of circuit

Thread Starter

mike_the_begginer

Joined Dec 7, 2019
132
Hi eric,
I given up on this project because I think that it is not suitable for me as a beginner.
I would like to test a verified project with LM723.
 

ericgibbs

Joined Jan 29, 2010
18,766
hi mike,
Sorry to hear that, but if you do come up with a revised circuit, I would be pleased to help out.
Post your verified circuit and we can run through with LTSpice.
E
 

Thread Starter

mike_the_begginer

Joined Dec 7, 2019
132
The last verified circuit is in the attached file.
Note: D3,D4,D5,D6 is a bridge rectifier (20Amps), D1 and D2 are P600D diodes, and Q6 is BD243C.
The same problem persist, when using 10R load at about 25V, then the output voltage drops by 50mV, so the output voltage is not very stable and this is a problem.
The transformer used was 33Vac 10A.
 

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ericgibbs

Joined Jan 29, 2010
18,766
hi mike,
One serious error, this short disables all the power transistors,
There are other areas I am checking out.

Also, this circuit is depriving the 723 of current, so it cannot drive the Base out

E
EG57_ 571.png
EG57_ 570.png
 
Last edited:

ericgibbs

Joined Jan 29, 2010
18,766
hi mike,
This circuit should give the Vout and Iout you require for 25V @3Amps, Max.
Current limit is set at ~3.6A, Rsense
P1 & P2 Vout setting pots, will will give you a wide range of Vout settings.
On an actual unit, the2N3055s require Heatsinks
Run the circuit in LTSpice.
E
EG57_ 578.png
 

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