Need a way to improve the performance of a power supply

[mayeewa]

Power supply

Suggest any way to improve the performance of a power supply,for example, how to modify the circuit shown in figure 1 so that it can give a continuous variable of output voltage from 0 and up to its max value.
Thanks for help.

 

[INS-ANI]

Power supply

why don't you use the traditional way of diode followed by voltage regulator .

 

[rajudp]

Power supply

the diode 1n4001 can handle only 1A , no need 2n3055. and what is the use of 680 Ohm resistor no need of this resistor

 

[pauloynski]

Re: Power supply

The 680Ω resistor is needed to counterweight T1´s leakage current. The diodes can be substitued by ones that can handle more current (but the transformer will also need to be up-rated). Removing the zener diode will increase rhe output voltage span. T1 may be substitued by a less costly transistor because it carries low currents. T3 and and the highlighted circuit can be substitued by an op-amp. In other words: a ready LM317 voltage regulator would be a logical choice

 

[pranam77]

Power supply

Hai Mayeewa
Its again the same regulator question. Hope you have got sufficient info in this post of yours. "&highlight=" of yours. Why are you starting a new thread with same topic again?. Any ways please let all know what experiments are you doing with various types of regulators? Many will join you. Good luck.

 

[daviddlc]

Re: Power supply

Seems like is a school related question.

If that is the case, you should mention it

 

[ferdie444]

Re: Power supply

@mayeewa,what don't you use full bridge full wave rectification and @ the same time you can replace 2n3055 by c1061?after the rectified volt.output you can use 4,7oouf/10v electrolytic filter capacitor as well as,on the final dc output you can put 470uf/10v to 1,000uf/10v filter capacitor.thanks and more power.....

 

[vistapoint]

Power supply

P can be replaced with a higher input impedance voltage sensor. Increasing it to 2K or 10K will be straightforward. Or a V-I-V circuit. Or an opamp will be better
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