Wisconsin Alumni Research Foundation

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

Lower Cost Motor for Electric Vehicles

A class of electric machine called an interior permanent magnet (IPM) can be used as a motor inside the wheel rotor of electric or hybrid-electric vehicles to power the wheels. One of the largest cost...
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Robert Lorenz, Natee Limsuwan, Takashi Kato | P120242US01

Technology

Motor for Electric Vehicles Solves Load/Loss Tradeoff

A class of electric machine called an interior permanent magnet (IPM) can be used as a motor inside the wheel rotor of electric or hybrid-electric vehicles to power the wheels. Conventional IPM machin...
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Robert Lorenz, Natee Limsuwan, Takashi Kato | P120243US01

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

Non-Intrusive Monitoring of Combustion Chambers

Exhaust emission and fuel economy standards have put increased pressure on the auto industry to improve the efficiency of internal combustion engines. While higher standards help protect the environme...
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Michael Andrie | P08225US

Technology

Vernier Motor Uses Less Rare Earth Materials

Rare earth magnets, like neodymium and dysprosium, are used in permanent magnet (PM) motors found in wind turbines and hybrid/electric vehicles. The cost of rare earth materials is escalating because ...
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Thomas Lipo, Byungtaek Kim | P130317US01

Technology

Fuel Reactivity Method Cuts Diesel Engine Emissions

Nitrogen oxides (NOx) and soot cause acid rain and smog. They are pollutants that commonly result from the burning of fuel in diesel engines. Engine conditions that reduce NOx emissions tend to increa...
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Rolf Reitz, Reed Hanson, Derek Splitter, Sage Kokjohn | P100054US02

Technology

Induction Motor Wastes Less Power

The induction machine is by far the most heavily used industrial motor, and ranges in size from a fraction of a horsepower to more than a megawatt. It produces torque by the electromagnetic interactio...
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Thomas Lipo, Prabhdeep Virk | P140055US01

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