Abstract
—Transformer parasitics such as leakage inductance
and self-capacitance are rarely calculated in advance during the
design phase, because of the complexity and huge analytical error
margins caused by practical winding implementation issues. Thus,
choosing one transformer architecture over another for a given
design is usually based on experience, or a trial and error
approach. This paper presents analytical expressions for
calculating leakage inductance, self-capacitance and ac resistance
in transformer winding architectures (TWAs), ranging from the
common non-interleaved primary/secondary winding
architecture, to an interleaved, sectionalized, and bank winded
architecture. The calculated results are evaluated experimentally,
and through finite element (FEM) simulations, for a RM8
transformer with a turns ratio of 10. The four TWAs such as, noninterleaved
and non-sectioned, non-interleaved and sectioned,
interleaved and non-sectioned, and interleaved and sectioned, for
an EF25 transformer with a turns ratio of 20, are investigated and
practically implemented. The best TWA for a RM8 transformer in
a high-voltage (HV) bidirectional flyback converter, used to drive
an electro active polymer based incremental actuator, is identified
based on the losses caused by the transformer parasitics. For an
EF25 transformer, the best TWA is chosen according to whether
electromagnetic interference (EMI) due to the transformer
interwinding capacitance, is a major problem or not.
Original language | English |
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Journal | IEEE Transactions on Power Electronics |
Volume | 31 |
Issue number | 8 |
Pages (from-to) | 5786 - 5796 |
Number of pages | 12 |
ISSN | 0885-8993 |
DOIs | |
Publication status | Published - 2016 |
Keywords
- Switch-mode power converters
- High voltage dcdc converters
- Energy efficiency
- Actuator
- Transformer parasitics
- Transformer winding architectures
- High voltage transformer