Summary

NewSpace Systems (NSS) offers custom-developed magnetorquer rod (NCTR-M003) that are designed to customer requirements for spacecraft attitude control. NSS' magnetorquer rod designs are TRL 9 and have extensive in-orbit heritage. Some of the larger NSS magnetorquer rods were first flown in 2014 on the SaudiSat-4 and DX-1 missions. Since then, NSS has become one of the largest magnetorquer rod manufacturers in the world, having delivered more than 200 CubeSat Rods and 1000 MicroSat Rods to a variety of international missions and constellations, all with differing performance requirements. To date, NSS magnetorquers have been baselined on three international constellations.

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 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 redundancy, 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.

Key features of the NSS magnetorquers include:

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

NSS magnetorquers can be utilized for the following applications:

  • Active damping for spin stabilised, momentum-biased and gravity-gradient-controlled satellites
  • Momentum dumping of reaction wheels in three-axis stabilised spacecraft
  • Simple magnetic stabilisation

All FM parts undergo random vibration (10 rms) as well as thermal cycling (four cycle ambiant pressure) to five degrees beyond operational thermal specifications. NSS can perform additional environmental testing if required by a client.

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Last updated: 2021-09-07

NMTR-X Custom Magnetorquer Rod

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Specs

mass per length
approx. 30 g/cm length (12 mm core)
length
12 cm up to 75 cm
width
12 cm up to 75 cm
height
12 cm up to 75 cm
magnetic moment
from 2 Am2 up to 300 Am2
linearity
< ±5% across operating range
residual moment
< 0.3 Am2 at 100 Am
power consumption per magnetic moment
1 W / 50 Am2 typical (customisable)
power supply
5 V DC - 28 V DC (customisable)
thermal (acceptance)
-25 to 70 C
mechanical vibration
21.06 gRMS (random)
connector type
9-way D-type male (micro-D on smaller rods, dual pins per winding and redundant winding options available)
can be replaced by a Molex® Pico-Lock

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