Rotor Bars

I don't have a clue.

Maybe this will help, maybe not.

http://www.reliance.com/mtr/pcrssmn.htm

I only know two ways - count them or ask the OEM.

One way to count them, or at least to verify the OEM's advice, is vibration analysis of the motor under load. On a high resolution 0 - 10kHz acceleration spectrum, you'll usually see an isolated spectral peak at a frequency corresponding with (motor turning speed) x (rotor bar count), and/or another one at (motor turning speed) x (stator slot count). But if the motor is in poor condition you may also see sidebands around either of those peaks that make them hard to pick.

If u are a motor designer you will know it when you finish the design.otherwiseyou need not.

Thanks a lot professor.I ask this question because I want to know numbers of them for CM software for analysis vibration.

Thanks.No Problem.You can write to the manufacturer with specific machine sl no and he can give it .This will be subject to thir policy.