An innovative solution to slip rings and plug connectors is the contactless energy transmission system which is aligned to resonance. For an efficient energy transmission high frequencies (around 100 kHz) as well as an operation in resonance is useful. Some applications need a single-phase (50 Hz) supply a new energy conversion principle can be used to solve the problem. This paper describes a new converter topology and the development of the necessary control signals for the secondary and the primary circuit which provides a single-phase 50 Hz voltage on the secondary side without a need for a DC link. Moreover, practical tests and measurements are presented.
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Dockhorn et al. (2008) studied this question.
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