Rotary Variable Differential Transformers (RVDT)

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 angular 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.

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.

Learn more about the latest Smart Sensor™ technology >

Model Voltage (VRMS)* Frequency (Hz) Primary (Input) Impedance** Scale Factor (V/Deg) Angular Displacement  
(+/- Deg)
AS-827-001 8.0 1870 65 + j475 0.061 40
AS-827-002 8.0
1870
65 + j475
0.068
40

AS-827-003
8.0
1870
65 + j475
0.068
40
AS-827-004 8.0 1870
65 + j475
0.061
42
AS-865-001 6.0 3000 50 + j455
0.061
40

AS-887-001
7.0 3000 217 + j448
0.052
30
RV-08-B-05C 5.7 3500 84 + j99
0.019
80
PRV-15-A-15A 3.5 2879 TBD
0.015
37
PRV-14-E-21E
7.0
5000
50 + j113
0.155
35

*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

Product Spotlight

Leveraging its experience in Rotary Variable Differential Transformers (RVDT), analog / digital circuit design, and digital signal processing, Moog has developed a turnkey solution to rotary position sensing which improves RVDT accuracy and ease of integration.

View Model 307 Smart Sensor Technology Data Sheet

Typical Applications

  • Flight control actuation / navigation
  • Fuel control / valves
  • Cockpit controls
  • Nose wheel steering systems
  • Missile fin actuation