High Motor Torque Momentum and Reaction Wheels

At Rockwell Collins, you can choose high motor torque momentum and reaction wheels that integrate wheel drive electronics at 14 to 68 Nms, or pursue solutions that we can customize for you.

Our Teldix space wheels are available with an angular momentum storage capacity spanning a range between 0.04 and 68 Nms. The wheels accommodate the requirements of attitude control systems for spacecraft weighing between 30 kg and 7,000 kg.

Time-tested products that deliver superior performance. They're what we bring you, backed by more than 40 years of experience in space wheel technology. Our Teldix space wheels have more than 7,300 years of combined in-orbit operational time - far exceeding competing products.

Contacts

Technical Support

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

Features & Benefits

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

Specifications

Performance

RSI68-170/60

Angular Momentum at Nominal Speed

68 Nms

Operational Speed Range

± 6,000 rpm

Speed Limiter (eMf)

< 7,300 rpm

Motor Torque at Nominal Speed

± 170 mNm

Loss Torque

< 20 mNm

RSI12-, 18-, 25-, 50-220/45

Angular Momentum at Nominal Speed

12 Nms
18 Nms
25 Nms
50 Nms

Operational Speed Range

± 4,500 rpm

Speed Limiter (eMf)

< 7,300 rpm

Motor Torque at Nominal Speed

± 220 mNm

Loss Torque

< 20 mNm

RSI30-280/30

Angular Momentum at Nominal Speed

30 Nms

Operational Speed Range

± 3,000 rpm

Speed Limiter (eMf)

< 7,300 rpm

Motor Torque at Nominal Speed

± 280 mNm

Loss Torque

< 20 mNm

Physical Specs

RSI68-170/60

Dimensions

     Diameter

347 mm

     Height

124 mm

     Mass

< 9.50 kg

RSI12-, 18-, 25-, 50-220/45

Dimensions 

 

     Diameter

347 mm

     Height

124 mm

     Mass

RSI12: < 6.00 kg
RSI18: < 6.45 kg
RSI25: < 7.15 kg
RSI50: < 9.20 kg

RSI30-280/30

Dimensions

     Diameter

347 mm

     Height

124 mm

     Mass

< 9.20 kg

Power

RSI 220/45

Power Consumption    

 

     Steady state at nominal speed

< 20 W

     Maximum torque at nominal speed

< 150 W

Power Interface

 

     Supply voltage

98 to 102 V 

     Input current

< 2.0 A

     Galvanic isolation between primary and secondary return

yes

     Preceding stage

yes

     On/off relay

yes

     Power feedback to bus

yes

Signal Interface

 

     Torque command and direction

PWM @ 500 Hz

     Speed measurement (Tacho Pulses)

Bi-level

     Speed direction

Bi-level

     Wheel status

Bi-level

     Motor torque (current)

PWM @ 10 kHz

     Bearing temperature

analog (thermistor)

     On/off status

Relay contact

     On/off command

Pulses (relay)

Environmental

Environmental Conditions

 

     Qualification/protoflight temperature

-25 to +75 °C

     Operating temperature

-20 to +70 °C

     Survival/non-operating temperature

-40 to +70 °C

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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