Abstract
A new very high efficiency 10 kW isolated R4
boost converter for low-voltage high-power fuel cell applications is presented. Using a new concept for partially paralleling of isolated boost converters, only the critical high ac-current parts are paralleled. Four 2.5 kW power stages, consisting of fullbridge switching stages and power transformers, operate in parallel on primary side and in series on secondary side.
Current sharing is guaranteed by series connection of
transformer secondary windings and three small cascaded
current balancing transformers on primary side. The detailed design of a 10 kW prototype converter is presented. Input voltage range is 30-60 V and output voltage is 800 V. Test results, including voltage- and current waveforms and efficiency measurements, are presented. A record high converter efficiency of 98.2 % is achieved. The proposed R4 boost converter thus constitutes a low cost solution to achieve very high conversion
efficiency in high input current applications.
Original language | English |
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Title of host publication | The Eigth International Conference on Power Electronics and Drive Systems |
Place of Publication | Taiwan |
Publication date | 2009 |
Pages | 601 |
Publication status | Published - 2009 |
Event | 8th International Conference on Power Electronics and Drive Systems - Taipei, Taiwan, Province of China Duration: 2 Nov 2009 → 5 Nov 2009 Conference number: 8 http://www.peds09.ntust.edu.tw/ |
Conference
Conference | 8th International Conference on Power Electronics and Drive Systems |
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Number | 8 |
Country/Territory | Taiwan, Province of China |
City | Taipei |
Period | 02/11/2009 → 05/11/2009 |
Internet address |
Keywords
- switched mode power supply
- pulse width modulation
- Current transformers
- power electronics
- fuel cell power system