Abstract
This paper evaluates two different implementations
of a bidirectional flyback converter for driving a capacitive
electro active actuator, which must be charged and discharged
from 0 V to 2.5 kV DC and vice versa, supplied from a 24
V battery. In one implementation, a high voltage MOSFET (4
kV) in series with a high voltage blocking diode is added, in
parallel with a high voltage freewheeling diode of a conventional
flyback topology, to enable bidirectional operation. Experimental
result from a digitally controlled bidirectional flyback converter
shows that the discharge energy efficiency is limited by the
parasitics of the high voltage active components, which also
prevent full utilization of valley switching during discharge
process. A second implementation is therefore proposed, where
the secondary of flyback transformer winding is split into multiple
windings which are connected in series by lower voltage rating
MOSFETs driven by a gate drive transformer. Simulation results
to compare the operation of conventional and proposed converters
are provided. The advantages of proposed implementation are
improved energy efficiency and lower cost. Experimental results
with two series connected secondary windings are provided to
validate the proposed implementation.
Original language | English |
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Title of host publication | Proceedings of 30th Annual IEEE Applied Power Electronics Conference and Exposition |
Publisher | IEEE |
Publication date | 2015 |
Pages | 50-56 |
DOIs | |
Publication status | Published - 2015 |
Event | 30th Applied Power Electronics Conference and Exposition - Charlotte Convention Center, Charlotte, United States Duration: 15 Mar 2015 → 19 Mar 2015 |
Conference
Conference | 30th Applied Power Electronics Conference and Exposition |
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Location | Charlotte Convention Center |
Country/Territory | United States |
City | Charlotte |
Period | 15/03/2015 → 19/03/2015 |
Keywords
- MOSFET
- Logic gates
- Windings
- Discharges (electric)
- Actuators
- Capacitance
- Inductance