Digital control of a high-voltage (2.5 kV) bidirectional DC-DC converter for driving a dielectric electro active polymer (DEAP) based capacitive actuator

Thummala, Prasanth; Zhang, Zhe; Andersen, Michael A. E.; Maksimović, Dragan

doi:10.1109/ecce.2014.6953867

Cited by 7 publications

(11 citation statements)

References 14 publications

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“…The charge and discharge efficiencies are 89.2% and 83.4%, respectively. The reasons for the lower discharge energy efficiency are explained in [33].…”

Section: Resultsmentioning

confidence: 99%

“…Several transformer winding architectures have been investigated in [32] for the high voltage capacitor charge and discharge application. A digital control technique to achieve the valley switching in a bidirectional flyback converter is proposed in [33]. This paper focuses on the power stage design of a bidirectional flyback converter, which is used to drive the incremental DEAP actuator as shown in Fig.…”

Section: A Cmentioning

confidence: 99%

“…For the bidirectional flyback converter, the primary and secondary turns are selected to avoid the saturation of the core during both charge and discharge modes. The converter operates with valley switching/BCM control during both charge and discharge processes [33].…”

Section: B Design Of Primary and Secondary Turnsmentioning

confidence: 99%

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Design of a high voltage bidirectional DC-DC converter for driving capacitive incremental actuators usable in electric vehicles (EVs)

Thummala

Zhang

Andersen

et al. 2014

2014 IEEE International Electric Vehicle Conference (IEVC)

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Abstract-This paper presents the design of a low input (24 V) and variable high output voltage (0-2.5 kV) bidirectional dc-dc converter for driving a capacitive actuator. The topology is a digitally controlled bidirectional flyback converter with a variable frequency control. The objective is, to design the converter for efficiently charging and discharging the capacitive actuator from 0 V to 2.5 kV and vice versa, respectively. The converter is used to drive a dielectric electro active polymer (DEAP) based capacitive incremental actuator, which has the potential to be used in automotive (e.g., EVs), space and medical industries. The design of the bidirectional flyback converter to charge and discharge a 400 nF capacitive actuator is presented, when 4 kV and 4.5 kV high voltage MOSFETs are used on the secondary high voltage side. The experimental results and efficiency measurements of the converter with the proposed design are provided. Keywords

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“…The charge and discharge efficiencies are 89.2% and 83.4%, respectively. The reasons for the lower discharge energy efficiency are explained in [33].…”

Section: Resultsmentioning

confidence: 99%

Section: A Cmentioning

confidence: 99%

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Design of a high voltage bidirectional DC-DC converter for driving capacitive incremental actuators usable in electric vehicles (EVs)

Thummala

Zhang

Andersen

et al. 2014

2014 IEEE International Electric Vehicle Conference (IEVC)

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“…Investigation of different transformer winding architectures (TWAs) for the same topology has been proposed in [34]. A new digital control technique to achieve the valley switching during both charge and discharge processes in a bidirectional flyback converter is proposed in [35], for better energy efficiency and improved charge and discharge speed. Primary parallel, secondary series flyback converter with multiple transformers is proposed in [36], to reduce the equivalent selfcapacitance on the secondary HV side.…”

Section: High Voltage Drivers: Conventional and Proposedmentioning

confidence: 99%

“…Primary parallel, secondary series flyback converter with multiple transformers is proposed in [36], to reduce the equivalent selfcapacitance on the secondary HV side. The HV converter used in [9], [30], [32], [35] The 4 kV, 300 mA high voltage IXYS MOSFET [37] has the following features:…”

Section: High Voltage Drivers: Conventional and Proposedmentioning

confidence: 99%

Bidirectional flyback converter with multiple series connected outputs for high voltage capacitive charge and discharge applications

Thummala

Schneider

Zhang

et al. 2015

2015 IEEE Applied Power Electronics Conference and Exposition (APEC)

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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.Balancing capacitor across a series combination of one of the splitted secondary winding and a secondary MOSFET.

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Analysis of device parasitics in a high voltage bidirectional flyback charging circuit

Satpathy

Lakshminarasamma

2016

2016 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)

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Digital control of a high-voltage (2.5 kV) bidirectional DC-DC converter for driving a dielectric electro active polymer (DEAP) based capacitive actuator

Cited by 7 publications

References 14 publications

Design of a high voltage bidirectional DC-DC converter for driving capacitive incremental actuators usable in electric vehicles (EVs)

Design of a high voltage bidirectional DC-DC converter for driving capacitive incremental actuators usable in electric vehicles (EVs)

Bidirectional flyback converter with multiple series connected outputs for high voltage capacitive charge and discharge applications

Analysis of device parasitics in a high voltage bidirectional flyback charging circuit

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