Boosting Voltage When Starting an Induction Motor

A variable speed drive would do the trick.

The cheap way would be to try and balance the load so that you don't get a particularly large voltage sag on one phase due to unbalanced phase loading.

Add a properly sized capacitor with a contactor and a timer (a few seconds). The capacitor will help maintain the line voltage and power factor during starting. This will increase the starting torque. Do not oversize the capacitor though.

Look at ABB and GE sites for sizing charts for the capacitor bank.

Thank you very much Mr. marcot, Realy worthful idea.you are supporting my thoughts.

Why not use two different starter contactor systems to operate this motor. Start it in delta and then switch to star after it has come up to speed. I know this has been done in the past as it was done in a paper mill I worked at one time. In that case, there were mechanical and electrical interlocks between the delta and wye starters to keep them from both being energized at the same time.

I'm sorry but I don't remember who built the switchgear or the motor. I dont even know what paper mill it was because I was in so many of them all over.