CubeTorquer

Low remanence torquers and coils

The main method of actuating nanosatellites in LEO uses magnetic torquer rods. CubeTorquer is a nanosatellite magnetic torquer that uses a specially treated ferrous core with ultra-low remanence and high linearity.

Ultra-Low Remanence

When it comes to magnetic control on satellites, it is most important to remove all unwanted magnetic disturbances. One of the most common such disturbances is remanent magnetic dipoles left in parts of the satellite, after a torquer has been pulsed. Therefore, we use a highly specialized material for the ferrous core of our rods. Further, we treat this material to give our rods ultra-low remanence, ultimately.

 

Ultra-Low Remanence

When it comes to magnetic control on satellites, it is most important to remove all unwanted magnetic disturbances. One of the most common such disturbances is remanent magnetic dipoles left in parts of the satellite, after a torquer has been pulsed. Therefore, we use a highly specialized material for the ferrous core of our rods. Further, we treat this material to give our rods ultra-low remanence, ultimately.

 

Compactness

In small satellites compactness is a strong requirement. The manner in which the standard CubeSat boards are stacked makes it difficult to have three rods form a 3-Axis system. Thus, we also offer a low-profile air-core coil that slots into the stack between the CubeSat PCBs. In this way, we can create a very compact 3-Axis magnetic control system.

Compactness

In small satellites compactness is a strong requirement. The manner in which the standard CubeSat boards are stacked makes it difficult to have three rods form a 3-Axis system. Thus, we also offer a low-profile air-core coil that slots into the stack between the CubeSat PCBs. In this way, we can create a very compact 3-Axis magnetic control system.

Specifications Summary

Functional Specifications

Nominal magnetic moment            ±0.24 Am 2 @ 2.5 V @ 20⁰C

Saturation magnetic moment         ±1.5 Am2

Linearity within ± 0.4 Am2               2.5 %

Residual moment                              < 0.48 milli-Am2

Resistance                                          29-31 Ω

Inductance                                         0.15 H

Physical Specifications

Overall length                                60 mm

Overall diameter                           10 mm

Rod core diameter                         5 mm

Rod core material                          Supra 50

Mass                                                22 ± 0.25 gram

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