Ferrite Rod Geometry for Magnetorquer Design

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The discussion focuses on the design of solenoid magnetorquers for a cubesat using unique ferrite rod geometry, specifically 19.6 cm in length and 0.67 cm in diameter. Participants express concerns about the impact of the fluted design on the efficiency of the magnetorquer, particularly regarding the need for longer wire and increased weight compared to a simple cylindrical rod. The goal is to maximize the magnetic dipole moment for effective torque against Earth's magnetic field. There is a request for part numbers or manufacturer information for the fluted rods, but no specific details are available. The conversation emphasizes the importance of understanding how the fluted geometry will influence performance.
inversquare
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Hello!

We are working with some ferrite rods to build solenoid magnetorquers for a cubesat design. The geometry on these rods is unique. Are there benefits to this type of a geometry?
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They are 19.6 cm length x .67cm diameter.
 

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Can you give us a part number or a link to the manufacturer of the 6 fluted rods? What are they designed to do?

Since your coil does not contain ferrite where the flutes are, you will need a longer wire to surround the same section of ferrite. That will weigh more than when wound on a simple cylindrical rod.
 
I see! Good to know, so you would even recommend to just use a simple cylinder? We are trying to maximize magnetic dipole moment for torque against the magnetic field of the Earth.

As to part numbers etc, I wish. I have no part information. I am working on our team leads to get some more data on them. In the meantime, I thought I would ask on here from a physics standpoint how the flutes will affect things.
 
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