- #1
Neumahn
- 2
- 0
- TL;DR Summary
- I am trying to determine the damping generated by spinning a motor rotor in a thin-walled copper tube. This is a stepper motor with 40 magnets radially charged along the circumference.
The motor is required to operate at its resonance frequency and I am looking to add a thin-walled (0.010") copper tube inside the stator bore to add some damping. The current motor air-gap is 0.015". If I install a copper tube in the stator bore bonded to the stator and leave a 0.005" air-gap between the tube and the rotor how would I calculate the damping torque as a function of motor speed?
Normally we could install a damping winding but these motors are already built and there is no room for a damping coil.
Thank you,
Neumahn
Normally we could install a damping winding but these motors are already built and there is no room for a damping coil.
Thank you,
Neumahn
Last edited by a moderator: