Ultrahigh-Voltage Switch for Bidirectional DC-DC Converter Driving Dielectric Elastomer Actuator

Specific applications, such as dielectric elastomer actuators (DEAs) or electroactive polymers, require to switch voltage levels exceeding the ratings of existing semiconductor devices. In low-power application, reversible flyback is widely used to supply DEAs. Lowering the parallel parasitic capaci...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2020-12, Vol.35 (12), p.13172-13181
Main Authors: Pniak, Lucas, Almanza, Morgan, Civet, Yoan, Perriard, Yves
Format: Article
Language:English
Subjects:
Actuators
Capacitance
Converters
Elastomers
Electric bridges
Electric power
Electroactive polymers
Electrodes
Electronics
Energy transfer
Engineering Sciences
High voltages
High-voltage techniques
Logic gates
MOSFET
MOSFETs
Parasitic capacitance
Parasitics (electronics)
Passive components
Semiconductor devices
Switches
Transformers
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Summary:Specific applications, such as dielectric elastomer actuators (DEAs) or electroactive polymers, require to switch voltage levels exceeding the ratings of existing semiconductor devices. In low-power application, reversible flyback is widely used to supply DEAs. Lowering the parallel parasitic capacitance of the high-voltage switch is important to improve the energy transfer, while it becomes mandatory to increase the output voltage of flyback above 2.5 kV. In this article, a pulsed transformer gate driver (PTGD) is used to drive series-connected MOSFET and, therefore, push the limits from 4.5 to 16 kV. At these high-voltage levels, the structure reveals a drastic voltage unbalance related to the transformer interwinding parasitic capacitance. The compensation method proposed to achieve voltage balance only adds few passive components and reduces significantly the additional parallel capacitance of the switch compared to common load side voltage balancing methods. Finally, and as proof of concept, a half-bridge bidirectional converter was designed from this switch technology and drove an actual DEA at 16 kV.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2020.2995047