Rotary thrust

The rotary thrust , like Esson's utilization factor, is a variable used to evaluate the utilization of the rotor surface of electrical machines such as electric motors . To determine the rotary thrust σ, the surface of the rotor is related to the generated tangential force F or the torque M :

${\displaystyle \sigma ={\frac {F}{d\cdot \pi \cdot l}}={\frac {2\cdot M}{d^{2}\cdot \pi \cdot l}}}$

with the rotor or rotor diameter d and the length l of the rotor.

literature

• Rolf Fischer: Electrical machines . 14th edition. Hanser, ISBN 978-3-446-41754-0 , Chapter 1.1.4: Performance and construction volume of electrical machines.