# 1000 kilo newton meter (K/Nm) torque

by parsci
Tags: 1000, k or nm, kilo, meter, newton
 P: 2 i want to produce 1000 K/nm of torque using motors and gear , output rpm needed is 30 and 1000 k/ nm of torque 1) motor kva? and rpm ? 2) gear ratio and size ? 3) does it also require flywheel ?
 Thanks P: 1,948 You mean you want to produce 1000 kNm and a frequency of 30 RPM. The way you wrote it makes no sense.
 Thanks P: 1,948 I also have no idea what a motor's kva is. No doubt another botched unit usage?
PF Gold
P: 2,241
1000 kilo newton meter (K/Nm) torque

 Quote by dauto I also have no idea what a motor's kva is. No doubt another botched unit usage?
No, the units are correct (although they should be written kVA). Motors (and e.g. transformers) are always rated in VA, not W. The former is the unit for apparent power whereas the latter is the unit for real power. They are related via the power factor of the load.
Thanks
P: 3,429
 Quote by parsci i want to produce 1000 K/nm of torque using motors and gear , output rpm needed is 30 and 1000 k/ nm of torque 1) motor kva? and rpm ? 2) gear ratio and size ? 3) does it also require flywheel ?
You will get better answers if you solve the problem yourself. Here's a hint to get you started: You already have enough information to calculate the power output, so you know how much power you need the motor to deliver. That will tell you what the motor kva must be; and when you're considering a motor it will be specced to deliver that power at a particular RPM. If that RPM is not 30, then you will need gears in whatever ratio will get you from the motor RPM to your desired 30RPM output.

Whether you need a flywheel or not will depend on how variable the load is.
P: 2
 Quote by Nugatory You will get better answers if you solve the problem yourself. Here's a hint to get you started: You already have enough information to calculate the power output, so you know how much power you need the motor to deliver. That will tell you what the motor kva must be; and when you're considering a motor it will be specced to deliver that power at a particular RPM. If that RPM is not 30, then you will need gears in whatever ratio will get you from the motor RPM to your desired 30RPM output. Whether you need a flywheel or not will depend on how variable the load is.
Thnks for reply , help me in getting output torque
150 kva motor 3 phase 960 rpm using double stage gear 1st stage 78 inch dia Reducing rpm 10:1 2nd stage gear 36 inch dia reducing 3:1 ,how much the output torque