Electromagnetic Unit (EMU) – Magnetic Torquer for Nanosatellites
Glavkosmos
The Electromagnetic Unit (EMU) is a magnetic torquer for nanosatellites, designed to create a dipole magnetic moment proportional to the current in its windings, used for attitude control and reaction wheel unloading.
Key figurescomparable across the catalogue
- Mass
- 27 kg
- Power
- 0.2 W
- Largest dimension
- 64 mm
- Design life
- 5 years
- Lead time
- 3 months
Normalised to common units so this product can be compared with others in its category. The supplier's own wording is below.
As published by the supplier
- Year of release
- 2019
- Design life
- 5 years
- Lead time
- 3 months
- Flight qualification of the product
- Yes
- Brief history of flight qualification
- Ground experimental testing.
- Possibility to adapt the product to customer requirements
- Yes
- Working orbits
- Low, medium and geostationary orbits
- Mass of emu
- 0.027 kg
- Magnetic moment
- ≥0 ,2 A·m² throughout the operating temperature range
- Residual magnetic moment
- ≤ 0.001 A·m²
- Number of windings
- 1 or 2
- Supply voltage
- 5 ± 0.1 V
- Power consumption
- ≤ 0.2 W
- Operating temperature range
- from -20 to + 55 °C
- Overall dimensions
- Ø9 × 64 mm
About
The Electromagnetic Unit (EMU) is a magnetic torquer specifically developed for nanosatellites. Its primary purpose is to generate a dipole magnetic moment, the value of which is directly proportional to the current flowing through its two independent windings. This unit is an integral component of a spacecraft’s attitude control system, facilitating the orientation of the satellite and the unloading of reaction wheels. Released in 2019, the EMU has a guaranteed service life of 5 years and an estimated production/delivery time of 3 months. It has undergone flight qualification through ground experimental testing, and there is a possibility to adapt the product to specific customer requirements. An option exists to develop and supply EMUs with a magnetic moment ranging from 0.2 to 2 A·m² based on customer needs.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.