Interleaved DC-DC Converter Topology With Phase-Shifted Transformers

The patent divides the transformer into multiple independent winding sets (first plurality of primary windings, second plurality of primary windings, and corresponding secondary windings). Each winding set can operate independently or in combination, enabling fault tolerance where the converter can continue operating with reduced capacity if one winding fails. This segmentation directly resolves the contradiction by providing adaptability through multiple operational configurations while managing complexity through modular design.

The multiple primary windings are configured to perform multiple functions: they can operate individually for fault tolerance, combine in series for voltage multiplication, or be selectively activated based on load requirements. The secondary windings similarly provide multiple output configurations. This multi-functionality enables the single transformer to replace what would traditionally require multiple transformers or complex switching arrangements, improving adaptability while controlling overall device complexity.

The patent implements dynamic phase shift control where the phase difference between primary and secondary windings can be adjusted based on operating conditions. The controller varies the phase difference to optimize power transfer efficiency across different load conditions and voltage ratios. This dynamic adjustment resolves the contradiction by maximizing energy efficiency through adaptive phase control while the controller manages the complexity of coordinating multiple windings with different phase relationships.

The system changes the phase difference parameter as a control variable to optimize voltage conversion efficiency. By adjusting the phase shift between primary and secondary windings, the converter achieves maximum power transfer at different operating points. This parameter change approach enables efficient voltage conversion across varying conditions while the controller handles the complexity of implementing multi-phase coordination.

The patent combines multiple secondary side switching networks into a unified interleaved control architecture where the switching operations of different windings are coordinated to achieve current sharing and reduced ripple. The multiple switching networks operate in parallel with phase-shifted timing, effectively combining their power conversion capabilities to increase overall productivity. This merging approach improves voltage conversion rate while the coordinated control manages the complexity of multiple switching devices.

The interleaved control implements periodic switching actions with different phase shifts for each secondary switching network. By distributing the switching events across different time periods and phases, the system achieves continuous power transfer with reduced ripple and improved efficiency. This periodic action with phase distribution increases productivity by utilizing multiple switching networks simultaneously while the rhythmic coordination pattern manages the control complexity.