Welcome to Power Electronics & Autonomous Systems (PEAS) Research Group. We are a research group with two state-of-the-art laboratories located in the Engineering Hall on the campus of Kansas State University in Manhattan, Kansas. These newly developed labs are equipped with various modern equipment and are growing.

Our goal is to perform research in the area of on-the-move energy technologies, design and control of power electronics interfaces, power quality, and grid resiliency. The present website includes highlights of our research outcomes, current research staff, and ongoing research projects.

We are always looking for opportunities to establish a working relationship. Prospective students should apply to the Electrical and Computer Engineering Department graduate program and may contact Dr. Mirafzal, Dr. Shadmand, or Dr. Fateh.

Directors of Power Electronics & Autonomous Systems Research Group.

PEAS Research Group Spotlight

  • PEAS research group in collaboration with Solar Prime LLC will develop a solar photovoltaic with battery backup small-scale test bed for cybersecurity analytics and autonomous operation. The test-bed will be located in PEAS research laboratory.
  • PEAS research group is working with COMET consortium (https://comet-iucrc.org/) to design and control high power density rectifier for more electric aircraft applications sponsored by Ultra Electronics ICE Inc.
  • PEAS group, for first time, has successfully tested a new type of GaN power devices for mobile energy technologies.
  • PEAS group has developed an ultra-fast SiC based rectifier for variable frequency applications.
  • "Powering Up", PEAS group research outcomes highlighted and published in KSU IMPACT magazine, link: https://www.engg.ksu.edu/docs/impact/archive/impact-fall-2018.pdf
  • PEAS research group congratulates our most recent Ph.D. graduate Aswad Adib. Dr. Adib is currently a postdoctoral research associate at PEAS.

Research Highlights

SiC based Ultrafast Rectifier for More Electric Aircraft and other Variable Frequency Applications

An ultrafast active rectifier is developed for wild-frequency applications where the rectifier is fed by a three-phase variable-frequency ac source. Three-phase ac-dc converters (rectifiers) are extensively implemented in motor-drives, wind turbines, electric vehicles and aircraft’s power systems. In some technologies, e.g. more electric aircraft and drones, power systems may employ variable-frequency generators for higher efficiency and reliability indices. The proposed ultrafast rectifier is equipped by a step-ahead predictive control scheme, an instantaneous phase-locked loop (PLL), and a module of six SiC MOSFETs.

Comprehensive Study of Weak Grid Impacts on the Stability of Grid-Tied Voltage Source Inverters

A weak grid can lead to voltage fluctuations at the inverter terminals and consequently cause inverter instability. In this project, impacts of circuit and control parameters on the stability of voltage source inverters are studied using a small-signal state-space model in the synchronously rotating dq-frame of reference. The full-order state-space model developed in this project is directly extracted from the pulsewidth modulation switching pattern and enables the stability analysis of concurrent variations in the three-phase circuit and control parameters. The project outcomes show that a decrease in the grid inductance does not necessarily improve the stability of grid-tied VSIs.