Tim Hegarty

ORCID: 0009-0009-2519-8889
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About
Contact & Profiles
Research Areas
  • Photovoltaic System Optimization Techniques
  • solar cell performance optimization
  • Multilevel Inverters and Converters
  • Power Line Communications and Noise
  • Electromagnetic Compatibility and Noise Suppression
  • Silicon Carbide Semiconductor Technologies
  • Advanced DC-DC Converters
  • Lightning and Electromagnetic Phenomena

Texas Instruments (United States)
2009-2023

A novel, high-efficiency inverter using MOSFETs for all active switches is presented photovoltaic, non-isolated, AC module applications. The proposed H6-type configuration features high efficiency over a wide load range, low ground leakage current, no need split capacitors, and output AC-current distortion. detailed power stage operating principles, PWM scheme, novel bootstrap supply the are described. Experimental results of 300 W hardware prototype show that not only MOSFET body diode...

10.1109/apec.2010.5433372 article EN 2010-02-01

Existing photovoltaic (PV) panels have widely varying input voltages based on the panel configuration and size. In this paper, a novel topology with single active switch - combining boost, flyback, charge-pump circuits is proposed in order to achieve wide range, high voltage gain, efficiency, low cost simultaneously. It meets input-voltage power-level needs of majority modern PV while still being suitable for connection highvoltage dc bus. The circuit has been designed, simulated,...

10.1109/ecce.2009.5316154 article EN 2009-09-01

This digest presents an integrated active EMI filter (AEF) solution that mitigates conducted common-mode (CM) emissions and improves power density in kilowatt-scale off-line supplies. The proposed AEF comprises circuit (IC) senses high-frequency CM noise from the lines using a set of Y -rated capacitors, while rejecting line-frequency differential-mode components. IC processes sensed injects cancelling current back into through another Y-rated capacitor, hence presenting very low impedance...

10.1109/apec43580.2023.10131427 article EN 2022 IEEE Applied Power Electronics Conference and Exposition (APEC) 2023-03-19
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