Rotary variable differential transformer (RVDT) sensor assembly with auxiliary output signal

摘要

Disclosed are assemblies, systems, devices and methods, including an assembly to determine an angular position of a rotatable structure external to the assembly. The assembly includes a sensor including a rotatable member, a main winding set and at least one auxiliary winding, and also a coupling element to couple the sensor to the external rotatable structure to cause rotation of the rotatable member of the sensor in response to rotation of the external rotatable structure. Resultant voltages at the main winding set and at the at least one auxiliary winding are produced based, at least in part, on an angular position of the rotatable member of the sensor. The angular position of the external rotatable structure is determined based on the resultant voltages at the main winding set and at the at least one auxiliary winding.

主权项

1. An assembly to determine an angular position of a rotatable structure external to the assembly, the assembly comprising:
a sensor including a rotatable member, a main winding set including a main primary winding proximate the rotatable member and a main secondary winding set proximate the rotatable member, and at least one auxiliary winding including at least one auxiliary primary winding proximate the rotatable member and at least one auxiliary secondary winding proximate the rotatable member; and a coupling element to couple the sensor to the external rotatable structure to cause rotation of the rotatable member of the sensor in response to rotation of the external rotatable structure; wherein resultant one or more voltages at the main secondary winding set correspond to at least two possible angular positions of the rotatable member of the sensor, and wherein at least one resultant voltage at the at least one auxiliary secondary winding is used to determine a correct angular position of the rotatable member, the correct angular position corresponding to the angular position of the external rotatable structure, from the at least two possible angular positions of the rotatable member corresponding to the resultant one or more voltages at the main secondary winding set.