# Induction motor starting torque and pull out torque

Recently I was doing some work on the induction motor where I found some general theory on starting speed torque curve of the induction motor. Where the theory is the starting torque will be 1.5x of rated torque & pull out torque will be 2x. Is this the always a condition or is there a any chance for the pull out torque can be 4x or 5x of the rated torque. Speed torque curve of induction motor

• Why do you need this increased ratio (as opposed to going for a bigger motor)? May 1, 2020 at 16:25
• I got an equivalent circuit of the motor which I cannot share here. I derived the speed torque characteristics for the motor in which the pullout torque is 5x of rated torque. But the rule of thumb is always 2x. So had this question is there any possibility for this much pullout torque 5x May 1, 2020 at 16:33
• It your comment is apart of the question, you should revise the question to include the comment. If you are asking why your derived results show such a high pullout torque, it may be because a simple equivalent circuit may result in starting torque that is too low.
– user80875
May 1, 2020 at 17:35
• No I verified my equations and derivations and results I got is also correct but weird. Thats why I asked in this way. May 1, 2020 at 18:07