Electronics > Projects, Designs, and Technical Stuff
where does one buy a 600VDC 10kW power supply?
Simon:
Yes it is more about making sure we are set up safely for the testers and the working environment in general. We will be building battery powered systems (no battery included) up to 600V currently but up to 1kV is I think prudent to cater for. So rather than purchase a power supply that can do exactly 600V and then have that be a wasted investment when we need 650V I am thinking we should be able to supply up to 1kV but the supply range I am looking at now is 800V or 1.5kV.
I don't know what testing procedures are required yet. I assume someone deemed to be competent will work in a restricted area testing systems after they have been inspected for build quality by someone that did not build it so that there is a second set of eyes on the equipment before it's powered. Once built there should probably not be any access to live parts.
If we get a 1.5kV supply it would be locked at under 1kV and probably to no more than 50V over the required working voltage.
Berni:
Well for that it might make more sense to buy multiple PSUs and reconfigure them in series or parallel as needed.
The 10kW 1.5kV supply might be so limited in terms of current capability that it might only give 4kW max at 300V. But if that is a two 750V supplies in series you can reconfigure them to parallel so the 300V is a more significant percentage of the 750V rated voltage and you get double the current due to being parallel. Just make sure the PSU is allowed to float up to such a high voltage.
But when it comes to testing like this, it is sometimes easier to have a battery bank capable of the required power then charge it with a little PSU. Just make sure there is plenty fusing and protection in place for if/when things go wrong.
HighVoltage:
As I have mentioned before, you might want to contact the German manufacturer FUG.
https://www.fug-elektronik.de/netzgeraete/professional-series/
They make custom order power supplies in high quality for reasonable prices.
Their professional series covers up to 70kW at 125V to 2000V
I have used their power supplies for clients in the automotive field and it has always worked out perfectly.
filssavi:
--- Quote from: Berni on February 05, 2020, 10:29:50 am ---Well for that it might make more sense to buy multiple PSUs and reconfigure them in series or parallel as needed.
The 10kW 1.5kV supply might be so limited in terms of current capability that it might only give 4kW max at 300V. But if that is a two 750V supplies in series you can reconfigure them to parallel so the 300V is a more significant percentage of the 750V rated voltage and you get double the current due to being parallel. Just make sure the PSU is allowed to float up to such a high voltage.
But when it comes to testing like this, it is sometimes easier to have a battery bank capable of the required power then charge it with a little PSU. Just make sure there is plenty fusing and protection in place for if/when things go wrong.
--- End quote ---
I would advise against putting HV power supplies in series if they are not expressly built to support that configuration as it might cause problems with common mode and such.
Also virtually all the High voltage/power PSUs are power limited, thus at low voltage you get much more current (you might have a 6A limit at the max voltage and 60 at low voltages)
Simon:
Yes most high power PSU's (over 2kW) don't do what is commonly called "powerflex" where between a minimum voltage and max they can deliver a near constant power with the amps going up as the volts go down. The ITEC is the first i see to offer this in units so powerful. The TDK-Lambda for example is a constant 17A no matter the voltage.
Yes putting supplies in series can be a problem. Parallel operation would be preferable as it makes things easier.
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