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Influence of Inverse Coupled Inductors on Fault-Tolerant Operation of Two-Phase DC-DC Converters
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| Author(s) |
Michael GLEISSNER |
| Abstract |
Multiphase DC-DC converters with coupled inductors are applied to increase the power density andefficiency. But coupling also creates an interference between still active and failed phases as well asinfluences the inductance characteristic. This paper investigates the fault-tolerance of multiphase DCDCconverters with focus on the behaviour of the total as well as phase current ripples and the inductorsaturation depending on duty cycle and coupling coefficient. Compared to non-coupled inductors, thetotal current ripple can be kept similar after loss of a converter phase if no saturation occurs. Moreover,the influence of the induced voltage due to coupling on the deactivated phase is analysed. Design hints forfault-tolerant strategies with coupled inductors are presented. Measurement results with various coupledinductors prove the theoretical considerations. |
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| Filename: | 0018-epe2015-full-12584399.pdf |
| Filesize: | 2.404 MB |
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| Type |
Members Only |
| Date |
Last modified 2016-06-08 by System |
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