Magnetorquers offer a method of controlling the attitude of a spacecraft either directly, by interacting with the local Earth’s magnetic field or, more usually, in combination with reaction wheels. This secondary method allows for the dumping of excess momentum in the reaction wheels without the need for a complex propulsion system.

The NewSpace Systems (NSS) magnetorquer rods use a magnetic alloy rod which produces an amplification effect over an air cored magnetorquer. This allows a system that uses less power and is less susceptible to magnetic torque variations due to temperature.

Each rod is typically bifilar wound for redun- dancy, or the windings can be activated together to increase the torque produced. While drive circuits for the rods can be supplied if required, they typically run directly between a switched power output and the on-board power control system.


  • High moment for low power
  • Small size and low mass
  • Very little residual magnetic moment
  • Adaptable for size, moment and power to meet optimal system requirements
  • Redundant windings available
  • Simple interface


mass< 50 g
magnetic moment1.19 A m^2
residual moment< 0.005 A m^2
length94 mm
height13 mm
mechanical vibration14 Grms
linearity< 5 %
power< 800 mW
voltage dc5 V
operating temperaturemin: -20 C, max: 60 C
width15 mm



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Last updated: 2019-02-01