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- Title
Soft-switching operation of the dual-interleaved boost converter over all duty ratios.
- Authors
Ahmed, Md Rishad; Todd, Rebecca; Forsyth, Andrew John
- Abstract
To extend the operating range of the snubber assisted zero-voltage and zero-current transition dual-interleaved boost converter beyond its inherent soft-switching limit of D = 0.5, a resonant pulse transformer is proposed instead of the resonant inductor. The 1 : 2 turns ratio of the transformer ensures full discharge of the snubber capacitor at all duty ratio values to facilitate zero-voltage zero-current switching at turn on of the main switching devices. The effectiveness of the topology has been confirmed by SPICE simulation and demonstrated by a 20 kW SiC metal--oxide--semiconductor field-effect transistor converter. The prototype operated at 20 kW, 112 kHz, 320--600 V achieving 98.7% efficiency and achieved 98.2% efficiency at 6 kW. Taking the additional losses in the auxiliary circuit into account, the switching losses at 20 kW are reduced by 74% compared with hard-switching operation, representing a 54% reduction in overall losses.
- Subjects
SNUBBERS (Electrical engineering); CONVERTERS (Electronics); METAL oxide semiconductor field-effect transistors; ELECTRIC inductors; ELECTRIC switchgear
- Publication
IET Power Electronics (Wiley-Blackwell), 2017, Vol 10, Issue 11, p1250
- ISSN
1755-4535
- Publication type
Article
- DOI
10.1049/iet-pel.2016.0861