schematic power supply 0-150 VDC

[Shahram]

I need a schematic diagram for variable regulated power supply 0-150
VDC and 2A
thanks,

 

[rwmoekoe]

hi ram,

i'll try to draw 4 u 1 that'll work.
plz gimme some additional info i need:

what is the source? (220vac, or what?)
have u tried the convensional bipolar power transistor (with a 723 or that kind) to build one yet?
what're the obstacles?
if not, why haven't u?

thx alot!

 

[Rich Grise]

I need a schematic diagram for variable regulated power supply 0-150
VDC and 2A
thanks,

http://www.google.com/search?q=variable+regulated+power+supply+0-150+VDC+and+2A

Have Fun!
Rich

 

[Ken Smith]

I need a schematic diagram for variable regulated power supply 0-150
VDC and 2A
thanks,

Some values are left as TBD. If you like the idea, I'll help you work out
the values.


I'll break it into 3 parts.

Part 1: You need some small fixed voltage supply to runt the control
electronics from. This is just a bridge and a transformer. The only
special requirements are that it makes enough 5V as Vcc to run the
electronics and has a connection to the transformer secondary brought out
as a signal I'll call "CROSS"

You will also need on/off switches and a pot to set the voltage with. The
POT can simply use the Vcc as a reference.



Part 2 the controller ascii art:

Vcc Vcc
! Vcc !
O 1N5304 ! -----
--- ----- ---!THR !
10K ! ! ! ! ! Q!--/\/\--!!--A
Cross -/\/\--+-+-------------! !----+---!TRG !
! FB-----! ! ----- CMOS-555
O POT----! ! !
--- 1N5304 ----- PIC GND
! !
GND GND


Part 3 the power section:

220VAC
-------------------------
!
V SCR
---
/ ! 10R
A----- --- +-----/\/\--------+-----+---- Vout
)!!( ! ! !
)!!( ! --- \
GND--- ------- --- /
! \
GND !
+-- Vfb
!
\
/
\
!
GND

 

[John Barrett]

I need a schematic diagram for variable regulated power supply 0-150
VDC and 2A
thanks,

a small boost regulator based on the IR1150 chip to get you a bus voltage in
the 200-300 volt range, followed by a small adjustable buck to give your
target output with current limiting -- you are looking at a couple of chips,
a coupla big MOSFETs, a few resistors and capacitors, and a couple of
inductors that may have to be hand wound (no different in essence than
the 200v 40amp boost-buck design that I'm working on right now, except you
want voltage mode regulaton. I run my bus at 400 volts, and use multiple
boosts and bucks to share the load

International rectifier has a designer for the boost converter on their
website that will hand you the schematics on a platter along with all the
component values

then all you need to do is design the buck -- which should be fairly easy
with all the online resources for buck converters.

 

[Wim Ton]

I need a schematic diagram for variable regulated power supply 0-150
VDC and 2A
thanks,

A Variac, a bridge rectifier and some big capacitors? And maybe an
insulation transformer!

Wim