W45E Reaction Wheel
Bradford Space
Extended-capacity W45-series reaction wheel for large satellite platforms requiring maximum momentum storage.
Typed specifications40 values
Discloses 7 of 10 fields engineers filter by in this category (category median 5).
- Mass
- 4 670 g 2-channel WDE · datasheet p.2 7 450 g RWA
- Envelope (L×W×H)
- 258x181x143 2-channel WDE · datasheet p.2 Ø365×125 RWA
- Angular momentum storage
- 45 N·m·s datasheet p.2 45 N·m·s W45E
- Max torque
- 248 mN·m maximum gross torque · datasheet p.2 248 mN·m max
- Speed range
- 4 000 rpm max · maximum operational speed · datasheet p.2 4 000 rpm max · Operational
- Supply voltage
- 28 V nom. · datasheet p.2 28 V nom. · 28Vdc bus option | 50 V nom. · 50Vdc bus option | 50 V nom.
- Power consumption
- 29 W steady state at max constant speed · datasheet p.2 168 W Peak Power Consumption at max. torque and speed | 7.6 W Quiescent Power Consumption | 29 W Steady State Consumption at max. constant speed
- Data interface
- MIL-STD-1553 datasheet p.2 other analogue | MIL-STD-1553 MIL-STD-1553B
- Operating temperature
- -15 °C min · RWA · datasheet p.2 60 °C max · RWA | -15–60 °C RWA, qualification | -30–60 °C WDE, qualification
- Peak power
- 168 W at max. torque and speed · datasheet p.2
- Static imbalance
- 0.5 g·cm datasheet p.2
- Dynamic imbalance
- 5 g·cm² datasheet p.2
- Random vibration
- 10 g RMS RWA, in-plane (qualification) · datasheet p.2 15 g RMS RWA, out-of-plane (qualification) | 11.2 g RMS WDE, in-plane (qualification) | 17.4 g RMS WDE, out-of-plane (qualification)
- Flight heritage
- SOHO, RadarSat, Seastar, Olympus, INTEGRAL, XMM, Rosetta, Aeolus, BepiColombo datasheet p.1
- Shock qualification
- 2 000 g WDE · datasheet p.2 400 g min · RWA | 2 000 g max · RWA | 400–2 000 g RWA, depending on balancing requirements
- Drive electronics
- external RWA channel consists of a Reaction Wheel Assembly (RWA) and o… · datasheet p.0 external separate Wheel Drive Electronics box (WDE)
- Zero-speed crossing
- yes proven zero crossings and low RPM performance · datasheet p.1
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier17 lines, in the manufacturer's own wording
- Interface
- Analogue or Digital
- Product line
- W-series Reaction Wheel Unit
- Momentum
- 45 Nms
- Maximum Operational Speed
- 4000 RPM
- Number of pulses per revolution
- 240
- Maximum Gross Torque
- 0.248 Nm
- Typical Torque Loss at max. speed
- 0.037 Nm
- Static/dynamic imbalance
- 0.5/5.0 g. cm, g.cm2
- Dimensions
- Ø365×125 mm
- Mass
- 7.45 kg
- Torque rise/fall time
- 80 ms
- Peak Power Consumption at max. torque and speed
- 168 W
- Steady State Consumption at max. constant speed
- 29 W
- Quiescent Power Consumption
- 7.6 W
- Supply voltage
- 28Vdc or 50Vdc
- Frequency
- up to 10 Hz
- Operating temperature
- -15°C to +60°C
About
The W45E is an extended-capacity variant of Bradford Space’s W45 Reaction Wheel Unit, offering the highest angular momentum storage in the W-series line for large satellite platforms and demanding attitude control missions.
Based on the same proven RWA design as the rest of the W-series, maximising available heritage database. High torque level over full speed range with fixed torque rise time for precise, repeatable control.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.