Calculation of round slots on the rotor for a squirrel cage asynchronous motor

[SenyaUw]

TL;DR Summary

Good afternoon, I started calculating the asynchronous motor with 2P=2 Zs=24, Zr=28. I want to use round-shaped closed-type slots for copper bars. The question is whether there is any method for calculating such round grooves of a closed type, before that I used rectangular or trapezoidal all the time. There are also some recommendations for choosing the height to which the rods should be sunk. Rotation speed 50000, rotor diameter 55 mm.Thank you in advance