RDR 68 Momentum and Reaction Wheels

Put more than 40 years of Rockwell Collins space-wheel technology and 7,300 years of in-orbit operational time to work for you. Our Momentum and Reaction Wheels feature external Wheel Drive Electronics (WDE) at 14-68 Nms, with cascadeable WDE 8-45.

Our TELDIX® space wheels are available with an angular momentum storage capacity spanning a range between 0.04 Nms and 68 Nms. And they accommodate the requirements of attitude control systems for spacecraft weighing between 30 kg and 7,000 kg. We also can customize a solution for you.

Contacts

Technical Support

Space Wheels
Phone 1: 49-0-6221-512-275
Email

Features & Benefits

  • Power/loss torque optimized
  • Hermetically sealed
  • Modular configuration
  • Fast adaptation to customer requirements
  • Includes space-qualified subsystems (rotor, motor, bearing unit and electronics)
  • Offers a broad spectrum of different wheel types
  • Thermal optimized
  • For satellites weighing 1,500 to 5,000 kg
  • High reliability through heritage
  • Usable as a momentum or reaction wheel
  • More than 15 years of lifetime design

Specifications

Performance

RDR 23-0 (RDR 57-0) and WDE 8-47

Angular Momentum at Nominal Speed

23 (57) Nms

Operational Speed Range

± 5,250 rpm

Speed Limiter (EMF)

< 7,500 rpm

Motor Torque at Nominal Speed

90 mNm

Loss Torque (maximum)

< 20 mNm

RDR 68-3 and WDE 8-45

Angular Momentum at Nominal Speed

68 Nms

Operational Speed Range

± 6,000 rpm

Speed Limiter (EMF)

< 7,500 rpm

Motor Torque at Nominal Speed

75 mNm

Loss Torque (maximum)

< 20 mNm

Physical Specs

RDR 23-0 (RDR 57-0) and WDE 8-47

Dimensions - Wheel (RDR)

 

     Diameter

345 mm

     Height

118 mm

     Mass

< 5.5 (7.6) kg

Dimensions - Wheel Drive Electronics (WDE)

 

     Ground plane

170 x 220 mm

     Height

56 mm

     Mass (incl. radiation shielding)

 1.45 kg

Total Mass (RDR + WDE)

< 6.95 (9.05) kg

RDR 68-3 and WDE 8-45

Dimensions - Wheel (RDR)

 

     Diameter

345 mm

     Height

118 mm

     Mass

< 7.6 kg

Dimensions - Wheel Drive Electronics (WDE)

 

     Ground plane

52 X 247 mm

     Height

145 mm

     Mass (incl. radiation shielding)

 1.25 kg

Total Mass (RDR + WDE)

< 8.85 kg

Power

Power Consumption (RDR/WDE)

 

     Standby

< 5 W

     Steady state at nominal speed

< 20 W

     Maximum torque at nominal speed

 < 90 W

Power Interface

 

     Supply voltage

24 to 51 VDC

     Input current

< 4.2 A

     Galvanic isolation between primary and secondary return

Yes

     Preceeding stage

Yes

     On/off relay

Yes

Signal Interface (WDE)

 

     Torque command and direction

Analog/bi-level

     Speed measurement and direction

Analog/bi-level

     Motor torque (current)

Analog

     Bearing temperature

Analog (thermistor)

     On/off status

Bi-level

     On/off command

Pulses

Environmental

Environmental Conditions

 

     Qualification/protoflight temperature

-10 to +55 °C (mineral oil)
-25 to +75 °C (synthetic oil)

     Operating temperature

 -5 to +50 °C (mineral oil)
-20 to +50 °C (synthetic oil)

     Survival/non-operating temperature

 -20 to +60 °C (mineral oil)
-40 to +75 °C (synthetic oil)

Lifetime

> 15 years (in orbit)

Typical System

Main Components

Please contact Rockwell Collins for additional information on this product.

Related Documents

Publications

Technical documentation is developed to your requirements for the operation and maintenance of your product.

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Training

Our instructional design specialists and staff of experienced instructors develop and support solutions to meet your operator and maintenance training requirements. We offer a host of solutions to maximize your investment. On-site and customized training are available.

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Services & Support

Tailored Services

Our facilities and capabilities allow us to offer a variety of support solutions from time and material repairs to fully integrated performance based logistics.

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