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DC Motor SCR rated higher than 180VDC ?

DC Motor SCR rated higher than 180VDC ?

DC Motor SCR rated higher than 180VDC ?

(OP)
Hello,

I'm looking for a DC Motor 1800RPM SCR rated, but higher than 180VDC.

I've been searching in the main companies websites Leeson, Baldor etc. but the highest voltage is 180VDC. For my application, I have 220V rectified, so I need SCR rated around 300VDC.

Anyone knows if SCR rated higher than 180VDC motors exist and if so, where could I find it.

Thank you!

David

RE: DC Motor SCR rated higher than 180VDC ?

What power (current) do you need?

There are SCRs that work very well off a 690 V grid and are rated 2500 V. Higher voltages are also available.

Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

RE: DC Motor SCR rated higher than 180VDC ?

(OP)
The problem is not the SCRs, but the DC motor galvanic isolation. I want to power the DC motor at a voltage (rectified) of around 300V(peak), around 200VDC (mean)

So I need a galvanic isolation of around 300V

Thanks

RE: DC Motor SCR rated higher than 180VDC ?

Can't tell for sure if you want the motor or the SCR DC speed controller or both. You also don't say what size you need.
  


"If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln  
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RE: DC Motor SCR rated higher than 180VDC ?

(OP)
Ok .. I was looking for the motor itself and I apparently did not have all the proper information from the engineering.

After a conversation with them, I found the following motor should fit for the application :

Leeson DC Motor
SCR Rated
1 HP
180VDC
230 Vac (input)
1800RPM

Initially I though the 230Vac was not enough,  but it is apparently acceptable

Thanks for your time!

RE: DC Motor SCR rated higher than 180VDC ?

Davicho,

Are you in management?

Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

RE: DC Motor SCR rated higher than 180VDC ?

(OP)
Skogsgurra,

I work in a small business... So, I do some management, marketing and help in R&D when they need it ;).. I have a 1st degree in electrical engineering.

regards,

David

RE: DC Motor SCR rated higher than 180VDC ?

For your future use, remember that it's usually much easier to LOWER the voltage to a piece of equipment than it is to raise it. You were probably thinking that because the rectified voltage off of 230VAC will be over 300, you would needed a 300V rated motor. But the DC Drive (SCR controller) can easily LIMIT the output to what the motor uses by just not sending all of the available voltage to it.

 


"If I had eight hours to chop down a tree, I'd spend six sharpening my axe." -- Abraham Lincoln  
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies  

RE: DC Motor SCR rated higher than 180VDC ?

(OP)
:) good! I get the idea.. thank you everybody.


 

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