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In this paper, we construct three Class-Φ2 resonant converters with GaN HEMT power devices, 1 kW output power, and switching frequencies of 10 MHz, 30 MHz, and 54.24 MHz. The GaN HEMTs in these converters exhibit losses, approximated thermally, that are significantly higher (up to an order of magnitude) than those predicted by simulation. To investigate, we use a Sawyer-Tower circuit to evaluate the...
This paper presents a compact RF power inverter implemented with a PCB multi-resonant input filter for driving an electrothermal plasma micro-thruster, mini Pocket Rocket 3.0 (miniPR 3.0). This miniPR 3.0 and its driving electronics are part of an investigation seeking to add micro propulsion systems to low cost CubeSats. The proposed RF power inverter and multi-resonant input filter use only air...
Electroporation is a technique that uses high pulsed electric fields to create pores in biological cell walls for medical, liquid sterilization and other applications. Many systems use mono-polar pulses for simplicity but electro-migration can limit electrode life. The following paper demonstrates a resonant circuit design for creating high voltage bi-polar dc pulses using a simple control strategy...
This paper demonstrates a high efficiency, high power density, and fast transient response dc-dc converter design capable of providing a high-voltage isolated output from a low-voltage input. Specifically, we demonstrate two 100 W, 2000 Vdc proof of concept prototype dc-dc converters operating at a switching frequency of 27.12 MHz with input voltages of 40 V and 100 V respectively. Capacitive isolation...
This paper presents the design and implementation of a 27.12 MHz, 320 W, 170 V to 28 V dc-dc resonant power converter with resonant inductors and capacitors embedded into the Printed Circuit Board (PCB). Operating at 27.12 MHz allows for small value and size resonant passive components to be implemented using traces on or within a PCB. Previous work [1]-[14] has demonstrated various ways of using...
This paper provides a performance review of select diodes for use in high frequency resonant rectifiers at modest power levels. Specifically, we evaluate the performance of several leading edge diodes for use in a 27.12 MHz Class-D type rectifier for output voltages from 170 V to 1000 V dc, and corresponding power levels between 8.5 W and 100 W. Previous work on resonant rectifiers at frequencies...
This paper presents the design and implementation of high frequency resonant converter based on the Class F/sub 2/ inverter for inductive power transfer. MHz frequency operation can allow for higher power density than conventional switching frequencies. The converter is based on the Class F/sub 2/ inverter, reducing the voltage stress across the switch compared to other resonant topologies. A prototype...
This work describes a novel, first-year graduate-level analog integrated circuit (IC) design course. The course teaches students analog circuit design; an external manufacturer then produces their designs in three different silicon chips. The students, working in pairs, then test these chips to verify their success. All work is completed within one semester, and the grading cycle in the most recent...
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