Mass Vibrator using a Neodymium cylinder

Click For Summary
SUMMARY

The discussion centers on creating a shaker or vibrator for an epoxy-based granite material project, requiring a frequency range of 20 to 200 Hz. The user, Jack, explores using a 1-inch diameter by 2-inch long Neodymium magnet to construct a voice coil but is cautioned that this approach may lead to overheating, similar to the motor previously attempted. The consensus suggests that a properly sized motor with an eccentric weight is a more viable solution, emphasizing the need to calculate motor power based on the mass, frequency, and oscillation magnitude.

PREREQUISITES
  • Understanding of voice coil mechanics
  • Knowledge of Neodymium magnet properties (13000 Gauss)
  • Familiarity with motor specifications and calculations
  • Experience with thermal management techniques (e.g., water jackets)
NEXT STEPS
  • Research motor sizing calculations for vibrational applications
  • Learn about eccentric weight mechanisms in motor design
  • Explore thermal management solutions for high-power applications
  • Investigate the properties and applications of axially magnetized magnets
USEFUL FOR

This discussion is beneficial for mechanical engineers, electrical engineers, and hobbyists involved in vibration systems, thermal management, and magnet applications in engineering projects.

jhudler
Messages
1
Reaction score
0
This is an electrical question but bear with me for some background.

I have a project creating an epoxy based granite material.
The sphere packing density is quite high with aggregate sizes from 2 to 600 microns.
So that means I'm left with a very thick mix.
Plus the added complication of doing this in a vacuum.

Requirements:

I need to make a shaker/vibrator (freq from 20 to 200 Hz).
Using a motor to vibrate has been tried and it overheats... go figure :)!

Materials:
1 inch diam x 2 inch long Neodymium magnet.
Lots of magnet wire and even a coil winder.

Supposition:
It seems to me that I could mount magnet to base to vibrate, then create a coil around the magnet (with suitable separation) and drive that? I can dissipate the heat with a simple water jacket created from aluminum tubing and encapsulate that with an epoxy mixture designed to conduct heat which would be mounted to the rack in the chamber.

Question:
Is it possible to create a simple voice coil using a cylindrical magnet?
If so given almost 13000 Gauss, how do I calculate the coil parameters (windings,gauge,amps,voltage).

Or do I need to resort to using Axially magnetized magnet like a speaker?

Or perhaps there are other idea out there to help me solve this problem.

Thanks,
Jack
 
Last edited:
Engineering news on Phys.org
It sounds like you are trying to reinvent the simple solenoid. It would likely heat up even faster than your motor.

Your best bet is to go back to the motor with eccentric weight approach. The motor you tried before was probably undersized.

To calculate the motor power, you need the mass being shaken, the frequency, and the magnitude of the oscillations.
 

Similar threads

Measuring the Speed of Sound in Water, Using Faraday's Law
  • · Replies 14 ·
Replies
14
Views
3K