High Current Low Voltage Power Source

[vijayamurugan.P]

hai Designers

this is vijayamurugan from VIT^,Velore,India
I am a P.G Student.
i have to design a D.C low voltage high Current Power Source
[Convetrer]
Ratings are
1800 Amps,75 Volts.
So i kindly request you the designers to suggest me a better Converter
Topology,Devices suitable for such ratings.and related things

Thanks in Advance
bai
vijay<[email protected]>

___________________________________________________________________
VIT^ - Vellore INstitute of Technology,Vellore,Tamilnadu,India. and is
evergrowing. http:\\www.vit.ac.in

 

[martin griffith]

hai Designers

this is vijayamurugan from VIT^,Velore,India
I am a P.G Student.
i have to design a D.C low voltage high Current Power Source
[Convetrer]
Ratings are
1800 Amps,75 Volts.
So i kindly request you the designers to suggest me a better Converter
Topology,Devices suitable for such ratings.and related things

Thanks in Advance
bai
vijay<[email protected]>

___________________________________________________________________
VIT^ - Vellore INstitute of Technology,Vellore,Tamilnadu,India. and is
evergrowing. http:\\www.vit.ac.in

There is not enough information in your post

1800 Amps,75 Volts.

the input or output specification?




martin

Serious error.
All shortcuts have disappeared.
Screen. Mind. Both are blank.

 

[vijayamurugan.P]

that is the output requirment
not input

suggest

 

[Fred Bartoli]

that is the output requirment
not input

suggest

1800A 75V output, no input.

Hmmm, let me think...
Yes... I'd go for an alternator feeding an AC motor that will drive the
alternator.

 

[Mook Johnson]

I think what he was getting at is:

What is the input power source that will supply your converter?

This is a 135K Watt output so you will need a special supply to provide
enough input power for such a beast.

Typical AC wall plug won't get it (typical 1.8k Watt)

Is this a sustained output or a pulse? If pulse how wide?

 

[vijayamurugan.P]

sorry sir

the input is 3 Phase AC 415V 50Hz/60Hz
the output Requirment is 1800 Amps,75 Volts.
Suggest me suitable Converter confihuration & devices used in the
circuit

 

[Rene Tschaggelar]

hai Designers

this is vijayamurugan from VIT^,Velore,India
I am a P.G Student.
i have to design a D.C low voltage high Current Power Source
[Convetrer]
Ratings are
1800 Amps,75 Volts.
So i kindly request you the designers to suggest me a better Converter
Topology,Devices suitable for such ratings.and related things

Without much experience at that power level, I'd
have a look at synchroneous rectification with a
FET recifier. Before that some multiphase
PWM modulators and a truckload of ferrite transformers.

Alternatively, thyristors in a 6 or 12 pulse
arrangement might be a solution.

Either way, a wrong trigger is going to be costly.
Don't even think of the sweat required to change
all parts.

Rene

 

[Winfield Hill]

vijayamurugan.P wrote...

the input is 3 Phase AC 415V 50Hz/60Hz
the output Requirment is 1800 Amps,75 Volts.
Suggest me suitable Converter confihuration & devices used
in the circuit

To design (or even just to specify and purchase) a 135kW
power converter, you need to hire an experienced expert.

 

[John Woodgate]

I read in sci.electronics.design that Fred Bartoli <fred._canxxxel_this_
bartoli@RemoveThatAlso_free.fr_AndThisToo> wrote (in <4152b7d8$0$32712$6
[email protected]>) about 'High Current Low Voltage Power Source', on
Thu, 23 Sep 2004:

1800A 75V output, no input.

Hmmm, let me think...
Yes... I'd go for an alternator feeding an AC motor that will drive the
alternator.

He says 'not input', not 'no input'. But a rotating machine solution
seems to be a reasonable one for those numbers. Certainly much quicker
to develop!

 

[Charles Elliot]

dated 23 Sep 2004 04:39:36 -0700,

that is the output requirment 1800 Amps,75 Volts.
not input

What is the input ?

 

[John Smith]

sorry sir

the input is 3 Phase AC 415V 50Hz/60Hz
the output Requirment is 1800 Amps,75 Volts.
Suggest me suitable Converter confihuration & devices used in the
circuit

1. Step down transformer
2. High current diodes (http://www.nteinc.com/Web_pgs/Industrial3.html)
3. Heat sinks for item 2

If you want smoothed DC, add items 4 and 5:

4. Filter inductor
5. Filter capacitors

Wire diodes in a full-wave bridge configuration

 

[Guy Macon]

the input is 3 Phase AC 415V 50Hz/60Hz
the output Requirment is 1800 Amps,75 Volts.

This will require very expensive parts.

Hire a high-current power supply design expert
- your total system cost will be lower.

 

[Fred Bartoli]

I read in sci.electronics.design that Fred Bartoli <fred._canxxxel_this_
bartoli@RemoveThatAlso_free.fr_AndThisToo> wrote (in <4152b7d8$0$32712$6
[email protected]>) about 'High Current Low Voltage Power Source', on
Thu, 23 Sep 2004:
He says 'not input', not 'no input'.

Yes. I noticed that but I couldn't help it and expected nobody would jump on
me.
....but I forgot about you

But a rotating machine solution
seems to be a reasonable one for those numbers. Certainly much quicker
to develop!

Sure.

 

[legg]

sorry sir

the input is 3 Phase AC 415V 50Hz/60Hz
the output Requirment is 1800 Amps,75 Volts.
Suggest me suitable Converter confihuration & devices used in the
circuit

At this power level, the requirements of the load will play a
significant role in determining the conversion method. Of major
concern are weight, volume, and regulation/ripple expectations. Cost
and environmental factors may also limit your choices.

If this is a tech school project, then you should identify one
practical application and concentrate on satisfying this one
application, as part of the design process. This will allow you to
make practical decisions about, for example, whether DC is actually
preferable over AC, as niether is intrinsically stated in your spec,
so far.

Once identified, you may find that the 75V and 1800A are not actually
required simultaneously - that the system power level is lower than
the label requirements suggest at first glance.

If you google for "MEGAWATT SOLID-STATE ELECTRONICS", you'll find a
number of informative articles, that may help in determining your
approach to a full-powered system.

RL

 

[Clarence]

hai Designers

this is vijayamurugan from VIT^,Velore,India
I am a P.G Student.
i have to design a D.C low voltage high Current Power Source
[Convetrer]
Ratings are
1800 Amps,75 Volts.
So i kindly request you the designers to suggest me a better Converter
Topology,Devices suitable for such ratings.and related things

Thanks in Advance
bai
vijay<[email protected]>

___________________________________________________________________
VIT^ - Vellore INstitute of Technology,Vellore,Tamilnadu,India. and is
evergrowing. http:\\www.vit.ac.in

So what are you going to do with a Superconducting magnet supply?
Build a collider?
WMD's maybe?
Or just trying to get the design for a $25,000 supply free?

 

[vijayamurugan.P]

This Power Supply is Meant for Magnetising Application.
magnet making materials are powdered and kept in a thin cylinder.
by applying a huge magnetic field we align the particles and
Compressing will give u asolid Magnet[permanent magnet]
the role oh such a high power source is to maintain the magnetic Field
whil magnet is made

thank u all for a live Dicussion
-vijay

 

[Winfield Hill]

vijayamurugan.P wrote...

This Power Supply is Meant for Magnetising Application.
... the role .. is to maintain the magnetic Field while
magnet is made.

That's another matter, a short peak-current, much easier.
Big capacitors, SCRs. How long do you need it to last?
How big are your magnets? Tell us about your coils.

 

[Rich Grise]

vijayamurugan.P wrote...

That's another matter, a short peak-current, much easier.
Big capacitors, SCRs. How long do you need it to last?
How big are your magnets? Tell us about your coils.

Would this be somewhat like a coin squeezer, but more like
a core sinterer?

Thanks,
Rich

 

[Winfield Hill]

Rich Grise wrote...

Would this be somewhat like a coin squeezer, but more like
a core sinterer?

Burt's quarter shrinker uses ~ 20kV and 100,000A for a few
microseconds, I suppose a big magnet energizer might need
2kV and 5000A for a few milliseconds? A capacitor bank and
an SCR, or two...

 

[Pooh Bear]

This Power Supply is Meant for Magnetising Application.
magnet making materials are powdered and kept in a thin cylinder.
by applying a huge magnetic field we align the particles and
Compressing will give u asolid Magnet[permanent magnet]
the role oh such a high power source is to maintain the magnetic Field
whil magnet is made

That just needs a pulse - not continuous DC. Somewhat simpler !

What pulse width is required ? Repetition rate ?


Graham