Wisconsin Alumni Research Foundation

Technology

BALANCED CURRENT-SOURCE INVERTER

UW Madison researchers have developed a switching circuit for a balanced current source inverter (CSI). The balanced CSIs utilize wide-bandgap semiconductors to address electromagnetic interference (E...
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Thomas Jahns, Hang Dai, Bulent Sarlioglu, Renato Amorim Torres | P210208US01

Technology

Control Of Small Distributed Energy Resources

A method of controlling the output inverter of a microsource in a distributed energy resource system is disclosed. Embodiments of the invention include using unit or zone power controllers that reduce...
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Robert Lasseter, Paolo Piagi | P05242US

Technology

Converter Control Using Reduced Link Capacitor

A controller selects a first switch vector based on a current, voltage, or power of a multi-phase load or power source. The first switch vector identifies a first state for each of a plurality of half...
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Venkata Giri Venkataramanan, Mahima Gupta | P160095US01

Technology

Controller For Self-Organizing Microgrid

A controller for individual sites of the microgrid controls loads, sources, the importing of power, and the exporting of power as a function of the energy storage at the site. A microgrid of such sit...
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Venkata Giri Venkataramanan, Ashray Gururaja Manur | P200047US01

Technology

Switch Network Of A Multilevel Power Converter Architecture

A power converter provides a pyramidal structure of switches communicating between a capacitive divider at the base of the pyramid and a terminal at the top of the pyramid to provide a transformation ...
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Daniel Ludois, Mahima Gupta, Venkata Giri Venkataramanan, Robert Cuzner | P170314US01

Technology

Semiconductor Switch

A semiconductor switch includes four diodes, two transistors, and a capacitor. The capacitor includes a fourth terminal and a fifth terminal. An anode of a third diode is connected to a third terminal...
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Venkata Giri Venkataramanan | P190065US01

Technology

Low Voltage Drop, Cross-Field, Gas Switch And Method Of Operation

A gas switch includes an anode and a cathode spaced apart from the anode, wherein the cathode includes a conduction surface. The gas switch also includes a plurality of magnets arranged to generate a ...
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James Lawler, William Hitchon, Tim Sommerer, David Smith, Steve Aceto, Jason Trotter, Joseph Michael, Kirk Marquard | P180151US01

Technology

Converter Control with Reduced Link Capacitor

A converter is an electrical device for converting electrical energy from one form to another, such as between alternating current (AC) and direct current (DC), between different voltages or frequenci...
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Venkata Giri Venkataramanan, Mahima Gupta | P170108US01

Technology

Inverter for Common Mode Voltage Cancellation

In a drive system, a voltage source inverter (VSI) may be used to transfer real power from a DC power source to an AC load. Conventional VSIs consist of two or three phase-legs, each of which is a ser...
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Bulent Sarlioglu, Di Han | P160142US01

Technology

Interface Switch for Distributed Energy Resources

Distributed energy resources (DER) are small power generators that are typically located near the customer’s load, where energy is used. Small DER produce low emissions, can be manufactured at l...
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Robert Lasseter, Paolo Piagi | P05322US

Technology

Combined Capacitor/Inductor with Improved Performance

Inductors and capacitors are fundamental building blocks in many electrical devices and provide energy storage. In many applications (both low- and high-powered electronics) the physical size of these...
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Daniel Ludois, Andy Schroedermeier | P150389US01

Technology

Reducing DC-DC Converter Loss for More Efficient Cars

DC-DC converters are used in a variety of devices to raise or lower voltage. They are used in the power systems of hybrid and electric vehicles to boost the battery’s output voltage. In these system...
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Robert Lorenz, Chi-Ming Wang, Masaki Wasekura | P130119US01

Technology

Dual Bridge Matrix Converter for AC to AC Power Conversion

A variety of circuit topologies using solid state switches have been developed to convert AC power at one frequency to AC power at another. One type of topology, known as the matrix converter, directl...
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Thomas Lipo, Lixiang Wei, Thomas Lipo, Thomas Lipo, Thomas Lipo | P01231US

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