Rerurn to Romy the Cat's Site


In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: Just 2 cents.Posted by xandcg on: 7/31/2022
 Amir wrote:
---------------------------------------------------   common internet information :
it seems UPS/inverters/ACRegenarators react different to different loads .PSU design affect on load characteristics and not all AC regenerators are good for specific type of load.it means if the AC regenerator not be quite Match for specific PSU then the "more power" will not give us better sound.
            
https://power-backup.ro/wp-content/uploads/2018/04/White_Paper_Power_factor_UPS.pdf"A UPS will be called upon to support different types of load equipment and these may have nonlinear input stages. The compatibility of the UPS output stage (ie, the inverter) with different types of nonlinear load equipment is usually stated in the product documentation. If not, it must be checked with the manufacturer directly. Note that:

  • In cases with high inrush currents or peak currents - eg, motor loads - even the stated range of UPS output power factor does not provide enough detail to determine if the UPS can support the load.

  • With static loads, the UPS specification can be used to determine compliance.

    The rated output power factor of UPS is not an indication of the quality of a UPS or say anything of its performance capability – it is merely used to state the ratio of the maximum active power versus maximum apparent power. Understanding the critical load profile and load input power factor is the key to making a decision how to specify the UPS power.

"--------------------------------------------------
I know pure power 3000 is good for most under 800w systems but finding a AC solution for over 1000w is my challenge.it seems only "higher power" will not give us good result and the PSU design is important for choosing UPS.
the question is do you have any experience with high power UPS like APC or "Victron Energy" or ABB?if there is more please share
thank you

I can't tell a lot but APC isn't good except for small home use (and their batteries aren't exactly reliable) - Eaton is solid. In Central America, where power outages are almost a daily thing you see Eaton everywhere. APC have issues syncing with generators that doesn't output a very stable frequency, while Eaton will sync with almost anything.


Victron Energy, I never heard about, and ABB is top quality and also charge in the same way (and unlikely to be interested in small ventures, or ever answer if they already don't know you) --- same for Wärtsilä.


Roughly speaking, AC re-generators use a «rectifier» to convert the electricity to DC and then an «inverter» to convert it back to AC. Add batteries in the middle and you have a UPS.


IMO, if you are looking to spend a good money on it, my advise would be to get a custom made one - using military grade or medical rectifier/inverter. I don't have experience with these companies but I would use a «Supercapacitor UPS»[1] for audio, and I would bet on Phoenix Ultracap to build them.

For a typical «Battery[2] On-Line UPS»,[2] my choice would be RENERA, but in case they were not interested in small projects I would start talking with Bastion.

[1] unless guaranteed uptime was a major requirement.[2] or a hybrid.[3] you need a «on-line», the ones that output from the batteries all the time instead of keeping them as backup power only.

Rerurn to Romy the Cat's Site