One or more techniques and/or systems are provided for transferring power and/or information between a stator and a rotor. The rotor includes a high voltage rectifier filter and an auxiliary regulator coupled to a power transfer apparatus (e.g., rotary transformer). The high voltage rectifier filter is configured to receive a first electrical signal, associated with a first voltage, from the power transfer apparatus and to generate a second electrical signal, associated with a second voltage, based on a frequency and/or an amplitude of the first electrical signal. The auxiliary regulator is configured to generate a third electrical signal based on the first electrical signal, where a third voltage associated with the third electrical signal is generated independent of the frequency and/or amplitude of the first electrical signal. A single bi-directional data link is used for control and/or communication between the stator and the rotor.
