Inverter Duty Motors
Inverter Duty Motors
(OP)
Hi folks,
Just curious if there are any three-phase electric motors out there that are specified by the manufacturer as inverter duty, can run on 460V/60Hz as well as 380V/50Hz, and are CE-marked?
Obviously any three phase motor can be run on an inverter, but if I'm specifying a motor for a machine I'm designing, I don't want to have to absorb the warranty costs should it fail.
I was hoping that someone would know off-hand so I don't have to go through the trauma of dealing with sales people....;)
Just curious if there are any three-phase electric motors out there that are specified by the manufacturer as inverter duty, can run on 460V/60Hz as well as 380V/50Hz, and are CE-marked?
Obviously any three phase motor can be run on an inverter, but if I'm specifying a motor for a machine I'm designing, I don't want to have to absorb the warranty costs should it fail.
I was hoping that someone would know off-hand so I don't have to go through the trauma of dealing with sales people....;)





RE: Inverter Duty Motors
For a start you can look at the FAQ. I'm not aware of any motors, inverter-duty or not, actually being nameplated for 460/60 and 380/50.
Whether it will run or not is a different issue.
RE: Inverter Duty Motors
I can only really advise on Siemens motors. I used to work for Siemens but don't anymore so I guess I'm not trying to sell you anything..
It is possible to get their standard European (IEC rated) motors double rated for 230/400 (400/690) 50Hz and 460V 60Hz.
For example:
A motor type 1LA7122-4AA10 is a 7.5kW @ 50Hz 400V 1455rpm in the Star winding rated 15.3A. Operating at 460V @ 60Hz only in the star Y connection would allow 8.6 kw 14.7A at 1755 rpm.
This would be an IEC motor (CE marked) but not a NEMA motor.
The windings automatically use a insulation coating called DURIGNIT that is suitable for inverter use.
RE: Inverter Duty Motors
You cannot specify your way out of a flawed system design!
"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: Inverter Duty Motors
In case any of you are interested, my objective is to design a single manufacturing system/process that can be used in North America as well as Europe. If I can do this using inverter duty motors which can run on North American and European standard voltages without compromising the reliability and functionality of the system, that would be ideal.