Integration of Inductive Position Sensor in a Rotary Transformer

Abstract

A rotary transformer with an integrated inductive position sensor is disclosed herein. The rotary transformer comprises a stationary side and a rotating side. The stationary side includes a core defining a central axis and a first printed circuit board (PCB) coupled to the core. A primary coil of the rotary transformer is positioned within the core concentric with the central axis. An excitation coil of an inductive position sensor and at least one sensing coil of the inductive position sensor is positioned on the first PCB. The rotating side includes a second PCB with a secondary coil of the rotary transformer positioned on the second PCB. Additionally, at least one target for the inductive position sensor positioned on the second PCB. The rotary transformer may be advantageously used to feed the rotor of a wound rotor synchronous machine.

Dependencies are inferred from the claim text.