NCTR-M012 Magnetorquer Rod

NCTR-M012 Magnetorquer Rod


Magnetorquers offer a method of controlling the attitude of a spacecraft. This can be achieved either directly, by interacting with the local Earth’s magnetic field, or in combination with reaction wheels where they allow a method of dumping excess momentum in the wheels without the need for a complex propulsion system.

The use of a magnetic alloy rod produces an amplification effect over an air cored magnetorquer. This allows a system that uses less power, which is critical for CubeSat missions. The rods can enable a mission with increased manoeuvrability and reduced detumble rates.

CubeSat Magnetorquer rods are designed to be run directly from a switched 5 Volt power output from the on-board power control system.

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  • Features
  • Performance
  • Product properties
  • Qualification
  • Documents
  • Applications:
    • Active damping for spin stabilized, momentum biased and gravity gradient controlled CubeSats
    • Momentum dumping of reaction wheels in three axis stabilized spacecraft
  • Low cost standard product
  • High moment for low power
  • Small size and low mass
  • Simple interface
  • No residual magnetic moment
  • Magnetic moment: 1.2 Am­
  • Linearity: Better than: +/- 5% across operating design range
  • Residual moment: < 0.002Am­
  • Operating range: -10°C to +50°C
  • Power: 5 Volt
  • Random vibration: 14gRMS
  • Lifetime: >10 years
  • Dimensions: 94mm x 15 mm x 13 mm
  • Mounting: 4x M2 Socket Head Cap Screws
  • Mass: < 50 g
  • Interfaces: Molex Pico-Lock
  • Operating range: -10°C to +50°C

The larger NSS magnetorquer rods were first flown in 2014 on the SaudiSat-4 and DX-1 missions. Since then, this product line has been delivered to a large number of international missions, all with differing performance requirements. To date, more than one hundred and fifty CubeSat rods have also been delivered.