Rotary Variable Differential Transformers (RVDTs)
Moog's RVDTs utilize brushless, non-contacting technology to ensure long-life and reliable, repeatable position sensing with infinite resolution. Such reliable and repeatable performance assures accurate position sensing under the most extreme operating conditions.
| Model | Voltage (VRMS)* |
Frequency (Hz) |
Primary (Input) Impedance** | Scale Factor (V/Deg) | Angular Displace-ment (+/- Deg) |
Accuracy (+/- Deg) |
|---|---|---|---|---|---|---|
| AS-827-001 | 8.0 | 1,870 | 65 + j475 |
0.061 | 40 | 0.2 |
| AS-827-002 | 8.0 |
1,870 |
65 + j475 |
0.068 | 40 |
0.3 |
| AS-827-003 | 8.0 |
1,870 |
65 + j475 |
0.068 | 40 |
0.3 |
| AS-827-004 | 8.0 |
1,870 |
65 + j475 |
0.061 | 42 | 0.4, 0.6 |
| AS-887-001 |
7.0 | 3,000 | 217 + j448 |
0.052 | 30 | 0.25 |
| RV-08-B-05C | 5.7 | 3,500 | 84 + j99 |
0.019 | 80 | 0.50*** |
| PRV-15-A-15A |
3.5 | 2,879 | TBD | 0.015 | 37 | 0.2 |
*Voltage and frequencies shown are typical. RVDTs can operate at other voltages and frequencies. Our design engineers are happy to design an RVDT to meet your voltage and frequency requirements **Primary impedance is shown as nominal |
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What are RVDTs?
A Rotary Variable Differential Transformer (RVDT) is an electromechanical transducer that provides a variable alternating current (AC) output voltage that is linearly proportional to the angluar displacement of its input shaft. When energized with a fixed AC source, the output signal is linear within a specified range over the angular displacement.
Typical Applications
- Flight control actuation / navigation
- Fuel control / valves
- Cockpit controls
- Nose wheel steering systems
- Missile fin actuation