Wisconsin Discovery Portal

Researcher's Profile

Last Name

Jahns 

First Name

Thomas 

Middle Initial

Areas of Research Expertise

* Power electronics
* Power semiconductors
* Switching circuit topologies
* Electric machines and actuators
* Digital real-time control
* Sensors
* Adjustable-speed drives
* Brushless motor drives and generators
* Automotive and aerospace electric systems

Web site

University Web Page of Thomas Jahns 

Curriculum Vitae (CV)

 

Current/Active Funding

  • NREL, 2010-2013, Development of Advanced Modeling Tools for Thermal Characterization of Electric Machines in Support of Advanced Electric Traction Drive
  • WARF, 2009-2034, Lab Share Account
  • WI Office of Energy Independence, 2010-2012, CRES MOU
  • UWF, 2011-2099, ELEC. MACH & DRIVES RES. FUND
  • Mult. Donors, 2001-2099, UW FUTURE ENERGY CHALLENGE TEAM
  • Mult. Donors, 2000-2099, DISCRETIONARY RESEARCH FUNDING
  • UWF, 2002-2099, IMPROVED DESIGN TECHNIQUES FOR INTERIOR PM MACHINES INTENDED FOR HIGH-SPEED APPLICATIONS
  • Department of Energy, 2010-2013, MOU with State of Wisconsin for Center for Renewable Energy Systems
  • DOE, National Energy Technology Laboratory, 2012-2016, Scalable, Low-Cost, High-Performance Non-Rare-Earth PM Motor for Hybrid Vehicles
  • Wisconsin Energy Research Consortium, 2011-2013, Integration of Second-Life Batteries into an EV Charging Station with Renewable Energy Sources
  • Johnson Controls, 2012-2013, Development of Improved Status Estimation Algorithms for Batteries and Ultracapacitors in Demanding Applications includiing Stop-Start Operation
  • Wisconsin Energy Research Consortium, 2012-2013, Planning and Design of Advanced Microgrid Testbed Facilities in Milwaukee and Madison

Issued Patent(s)

  • 6,909,620 - Inverter configurations with shoot-through immunity, granted July 2005.
  • 5,986,419 - Quadrature axis winding for sensorless rotor angular position control of single phase permanent magnet motor, granted Nov 1999.
  • 5,838,127 - Single phase motor for laundering apparatus, granted Nov 1998.
  • 5,289,107 - Switched reluctance generator system with fault recovery capability, granted Feb 1994

USPTO Published Applications

Recent Publication(s)

  • "Scalar PWM algorithms for four-switch three-phase inverters"

An QT, Sun L, Zhao K, et al., Electronics Letters 46 (13): 900-U48 Jun 2010.  Four-switch three-phase inverters (FSTPIs) have been proposed to be used in low-cost applications because of the reduced number of semiconductor devices, and space vector pulse width modulation (SVPWM) techniques have also been introduced to control FSTPIs.  The simulation and experimental results demonstrate the validity of the proposed method.

  • "Analysis of negative-saliency permanent-magnet machines"

Moncada RH, Tapia JA, Jahns TM, IEEE Transactions on Industrial Electronics 57 (1): 122-127 Jan 2010. In this paper, a negative-saliency permanent-magnet (PM) synchronous machine analysis is presented.

  • "Winding inductances of fractional slot surface-mounted permanent magnet brushless machines"

El-Refaie AM, Zhu ZQ, Jahns TM, Howe D, Compel-The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 28(6): 1590-1606 2009. 

  • "Observer-based control methods for combined source-voltage harmonics and unbalance disturbances in PWM voltage-source converters "

Lee K, Jahns TM, Lipo TA, et al., IEEE Transactions on Industry Applications 45 (6): 2010-2021 Nov-Dec 2009. In this paper, computationally efficient sinusoidal-disturbance estimation and elimination methods are introduced into the control of an active front end (AFE) voltage-source converter (VSC) to achieve effective disturbance rejection in high power systems with slower pulsewidth-modulation switching frequencies (e.g., 5 kHz) and limited current-controller bandwidth.

Recent Artistic Works

 

Collaboration

  • Wisconsin Electric Machines and Power Electronics Consortium
  • Eaton Corporation, Kevin Lee
  • GM Advanced Technology Center, Sibaprasad Chakrabarti
  • Electric Machine Drive System Department, Ford Motor Company, Hongrae Kim
  • Virginia Polytechnic Institute

Research Tools

 

Research Facilities

 

E-mail Address

jahns@engr.wisc.edu 

Phone Number

(608) 262-5702 

Current University

UW - Madison 

Department

Electrical and Computer Engineering 

Title

Professor 

Other Appointments

 

Address Line 1

2559 Engineering Hall 

Address Line 2

1415 Engineering Drive 

City

Madison 

State

WI 

Zip Code

53706 

Bachelor's Degree

 

Master's Degree

 

PhD

PhD, Massachusetts Institute of Technology, 1978

Other Degrees

 

Technologies Available for Licensing

Attachments
Created at 6/18/2007 3:14 PM  by EXTWEB\mbrown 
Last modified at 3/6/2013 3:07 PM  by EXTWEB\jkett