Effects of leakage inductances on magnetically coupled y-source network

Yam P. Siwakoti, Poh Chiang Loh, Frede Blaabjerg, Graham E. Town

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


Coupled inductors have been used with impedance-source networks, extended from the earlier Z-source network, to keep their shoot-through times short, while providing high-voltage gains. A commonly stated requirement for these networks is that their magnetic couplings must be strong or their leakage inductances must be small. This is often difficult to achieve in practice especially at high switching frequencies. It is therefore necessary to understand the effects that leakage inductances have on the performance of these converters. In this letter, we address these issues for the latest Y-source network, showing in particular that voltage spikes will appear across its switching devices in some, but not all, cases. Experimental results verifying the findings have been obtained and presented at the end of this letter.

Original languageEnglish
Article number6819851
Pages (from-to)5662-5666
Number of pages5
JournalIEEE Transactions on Power Electronics
Issue number11
Publication statusPublished - Nov 2014

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