Any advantage to higher voltage motors?

[Ron74]

Hi,

I am trying to figure out what type of motor should I use for the equipment for the pilot I design.
Is there any advantage to 575V 3p motor over 440V 3p? I am talking mostly about low output motors, up to 10kW.
Will there be any advantage for 150kW equipment?

Thanks,
Ron

 

[Ron74]

A patented electrolysis process.
I need to maintain a constant current while the voltage changes with the process.

 

[PowerWagon81]

The thing I find the most interesting is that you cannot find a 600V AC-DC power supply. What are the requirements on the power supply?

 

[waross]

Are you needing 150 kW DC? Give us a few details and we will make some suggestions.
Are you able to share the make and model of DC supply that you are interested in?
150 kW DC may be a much bigger issue than motor voltage.
Is this a one off, or will you be selling the machines?

I need to maintain a constant current while the voltage changes with the process.

My first thought was an MG set with an Amplidyne but those days are long gone, never to return.
(thnks smoked.)


Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[Ron74]

I need to supply current to the electrodes.
I will probably be needing several smaller units total around 150 kW.
I thought about those PS

https://magna-power.com/products/magnadc/ms.

Ron

 

[ScottyUK]

Answering Keith's question of a few posts ago -

We don't tend to see dual-voltage machines in Europe, other than the natural dual voltages arising from a star or delta connection. The difference in insulation between, say, a 3.3kV machine and an 11kV machine is significant. Smaller 3.3kV machines are like an overgrown LV machine and often built in a similar manner, where an 11kV machine will almost certainly have formed windings and taped insulation. There's a very different fill-factor in terms of how much dead space exists in the higher voltage machine because of extra insulation. Having skipped back to the the original question where the motors are clearly stated to be LV, this probably is particularly helpful to the OP.

 

[waross]

Select a Power Distribution Center or a panel suitable to power all of your power supplies.
Use an open delta auto-transformer to drop the 600 Volts down to 480 Volts.
You may run your motors on either 600 Volts or on 480 Volts from the panel.
You will not be able to connect line to neutral loads to the 480 Volt system, only line to line loads.
I have seen this done many times. I have also many times seen situations where 480 Volts was stepped up to 600 Volts with an open delta auto-transformer and then stepped back down to 480 Volts with an open delta auto-transformer.
I have also seen situations where 600 Volts was dropped to 480 Volts and then stepped back up to 600 Volts.
An open delta auto-transformer is by far the cheapest and efficient way to make small changes in voltage.

Bill
--------------------
"Why not the best?"
Jimmy Carter