The Latest in Phase Shift Full Bridge Topology

If you are looking to build a higher efficiency converter for applications such as AC-to-DC power supplies, battery chargers, or renewable energy, we recommend Phase Shift Full Bridge (PSFB) topology as a solution to explore. Here we provide an overview of the topology – how full bridge converter hardware is arranged, including its nodes and connecting lines – that goes into a PSFB converter.

Full Bridge Converter Topology

Over the years, full bridge switch topology has been designed and developed for high power regulators, specifically those between 100 and 1,000 watts.

New technologies and materials have led to significant improvements to these converters and regulators. The most noticeable change is the size of the converters, which are now five to ten times smaller than previous models. The efficiency of the switches has also improved, from 70% to over 95%.

 

Figure 1. Full Bridge with Center Tap

Figure 2. Full Bridge without Center Tap

Phase Shifted Full Bridge (PSFB)

Many power applications such as AC-to-DC power supplies, battery chargers, and renewable energy applications require high efficiency and high power density.

Phase shift full bridge converters are used in high DC bus voltages and low output voltage with high power applications. To lower switch losses, decrease costs, and improve efficiency, an additional resonant inductor is sometimes added into the PSFB circuit. Doing so also provides zero voltage switching (ZVS).

Customers looking to build a higher efficiency converter will often turn to PSFB topology.

For such applications, MPS can customize both a high-efficiency PSFB transformer and a resonant inductor with low losses for high current and high frequency.

Included features:

  • Designs of up to 20 KW or more
  • Customizable mounting options
  • Thermal potting for cold plate mounting

Dual Active Bridge (DAB)

Bidirectional dual active bridges are developed for use primarily in battery storage, grid-tied inverters, and interface solar systems. Similar to PSFB transformers, the output for dual active bridges is four switches that are used to generate the bidirectional functionality.

Contact MPS Today

All MPS Industries products are designed in-house and can be customized to meet your unique specifications. Our engineering team will provide you with magnetic components that best fit your application or industry, all while staying within the necessary budget. Our product line includes a number of different power transformers and inductors. Check out our line of planar transformers – including phase shift full bridge transformers – here or contact us today to find out more about our products, services, and capabilities.

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