Inverter Duty Motors 1

[OregonSaluki]

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....

 

[dpc]

faq237-1224

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.

 

[ozmosis]

OregonSaluki
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.

 

[jraef]

... I don't want to have to absorb the warranty costs should it fail. ...

It should be noted that just specifying an "Inverter Duty" motor does not solve that issue. You need to carefully engineer the total system for reliability and proper functionality. I'm sure you did, I just wanted to point that out for others who may read this some day.

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

 

[OregonSaluki]

Thanks folks for your replies.

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.