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High Motor Torque Momentum and Reaction Wheels 14 - 68 Nms
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Overview
Rockwell Collins TELDIX® momentum and reaction wheels are available in five different sizes with an angular momentum storage
capacity spanning a range between 0.04 Nms and 68 Nms. The wheels accommodate the requirements of attitude control systems
for satellites weighing less than 65 kg as well as for geostationary satellites reaching a mass of three tons and more.
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Description
This wheel family, covering the momentum range from 14 to 68 Nms, features a versatile design capable of dealing with a great
variety of applications in all possible satellite orbits. The basic design consists of a highly reliable bearing unit, a spoked
flywheel mass, and a DC motor in a vacuum tight, evacuated housing. The modular design allows adaptation for program specific
requirements.
The motor is capable of developing a torque of up to 300 mNm. The wheel contains a built-in Wheel Drive Electronics with an
interface to:
- PWM (pulse width modulated) torque command
- Analog / bi-level telemetry
- Power feedback during braking
All versions may be used either as momentum or as reaction wheels.
These wheels are intended for satellites with a life expectancy of 15 years and more. The 15-year wheel design life is achieved
by using a dedicated oil-resupply-system in the bearing unit, invented by Rockwell Collins. The system is activated by centrifugal
forces and it guarantees adequate, permanent lubrication replenishment during its entire lifetime.
Applications
This wheel class was developed for the Avionique4000 platform. The adaptation for application in other programs and on other
platforms is under development.
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