Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
Framesizes Eletromotors 1
- Thread starter wijay
- Start date
A 112M motor can be one of the following common sizes:
2 pole (2900 RPM), 4 kW
4 pole (1450 RPM), 4 kW
6 pole (960 RPM), 2.2kW
Of course, as you go up in poles (decrease in syn. RPM), the nameplate power drops so if the motor is slower than a 6 pole then the power will probably also be lower. However, slow speed motors of that small horsepower are very rare so I doubt that's the case here.
Tim Steadham, P.E.
2 pole (2900 RPM), 4 kW
4 pole (1450 RPM), 4 kW
6 pole (960 RPM), 2.2kW
Of course, as you go up in poles (decrease in syn. RPM), the nameplate power drops so if the motor is slower than a 6 pole then the power will probably also be lower. However, slow speed motors of that small horsepower are very rare so I doubt that's the case here.
Tim Steadham, P.E.
-
1
- #4
A 112M IEC (metric) motor will measure 112mm from floor to centerline of shaft. The 'M' will probably indicate a bolt-hole pattern of approximately 1.30 times the 112 dimension. Other frame sizes are similar. An 'S' bolt-hole pattern will be just over 1 times shaft centerline height (frame size) and an 'L'motor will normally have a bolt-hole pattern over 1.5 times shaft height. These are general rules that I use when I don't have a book handy.
Hope this is a help.
Hope this is a help.
- Status