Rotary transformers are adopted to transfer energy from primary to secondary in situations in
which the two sides are in relative rotation. These devices are cylindrical transformers with …

This paper concerns the optimal design and comparative analysis of resonant and non-
resonant high-frequency GaN-based rotating transformers. A multi-physical design …

In this work, a brushless, harmonic-excited wound-rotor synchronous machine is
investigated which utilizes special stator and rotor windings. The windings magnetically …

Wound rotor synchronous machines require a brushless excitation system to reach higher
speeds reliably and avoid maintenance issues. This paper presents the design, assembly …

For energizing the rotating field winding of electric machines without mechanical contact, the
contactless energy transfer (CET) with power converter and rotary transformer (RT) is a …

Estimation of electrical losses for machines is important to operating them efficiently.
Although copper loss is typically the dominant form of electrical losses in an electric …

Traditional ice protection systems for helicopters convey electrical power from generators to
blade heaters through flimsy carbon contacts embedded in" slipring" devices. However, the …

The rotary transformer (RT) converter transfers power from a stationary winding to a rotary
winding via power electronics converter, and it is a promising solution to achieve brushless …

This paper concerns a multi-physical modeling framework based on the spectral element
method (SEM) for axisymmetric wireless power transfer systems. The modeling framework …

Wireless power transfer allows the transfer of energy from a transmitter to a receiver across
an air gap, without any electrical connections. Technically, any device that needs power can …