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

Thread starter SenyaUw
Start date Aug 14, 2024
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Cage Rotor

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Round bars in squirrel cage asynchronous motors are not ideal for high torque applications due to their design limitations. Burying these bars can help reduce torque pulsations and noise but may lead to decreased leakage induction and breakdown torque. For a deeper understanding of these effects, the book "The Induction Machine Handbook" by Boldea and Nasar is recommended. Overall, the design choices for rotor slots significantly impact motor performance and efficiency. Proper consideration of these factors is essential for optimizing motor functionality.

Aug 14, 2024

SenyaUw

TL;DR: 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

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Aug 23, 2024

onatirec

Rounds bars are not well suited for higher torque applications. Burying them can decrease torque pulsations and noise, while sacrificing leakage induction and breakdown torque.

You can find a somewhat more detailed treatment of them in Boldea, Nasar - The induction machine handbook.

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