Thank you all for your positive contributions.
The point I was trying to fully understand out of this is, as confirmed Peak torque of motor when overspeeded by drive could be calculated from
Peak torque= rated torque x breakdown torque x X% safety margin x (rated speed squared/ new increased...
What is the formula for calculating the peak torque available when a standard induction motor is overspeeded with a standard pwm inverter drive with 150% overcurrent capacity. For example, for a 4KW, 4 pole, 50Hz motor with a DOL pull up torque of 3 X FLT overspeeded to 80Hz.
