A UW-Madison researcher developed new power electronics conversion circuit designs and modulation and control techniques improve power levels, power density, and efficiency. For the circuit topologies...
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UW-Madison researchers have designed a bidirectional switch based on an AlGaN/GaN structure with BaTiO3 to achieve the ideal target of ~1-1.1x resistance. The design is scalable from 100 V - 10 kV. T...
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UW Madison researchers have developed a current-source inverter topology (H7-CSI-BD) combined with two new modulation schemes that have four-quadrant power flow, high power density, high efficiency, h...
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Researchers at the University of Wisconsin-Platteville have created a technique for detecting stator intermittent ground faults in utility-scale generators. These intermittent ground faults can cause ...
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UW-Madison researchers have developed improved Group III-nitride based high electron mobility transistors (HEMTs). The HEMTs combine a high-aluminum-content barrier layer with a recessed gate that pro...
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Typically, bidirectional switching elements are fabricated using two FET devices, for example, arranged in series with opposite polarities, each device shunted by a diode to steer current to the prope...
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A UW researcher has developed a new power tether for aerial devices, such as balloons or drones, that uses as few as one conductor, providing a ground return by capacitive coupling between the aerial ...
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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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A microsource is provided, which includes an energy storage device, a power generation device, and a controller. The energy storage device is operably coupled for power transfer to a load through a fi...
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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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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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An aqueous rechargeable zinc ion battery is provided, the battery comprising a cathode comprising a V3O7.H2O-graphene composite, the composite comprising a plurality of V3O7.H2O nanostructures in cont...
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A core function of firetrucks and tenders are to haul initial water to an emergency and often serve as a sole source when water is not nearby from a hydrant or other source. As part of their key roles...
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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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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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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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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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A switching circuit includes a diode, a semiconductor switch, and a first bidirectional switch. The semiconductor switch is configured to conduct a first current from a second terminal to a third term...
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High-power electrical equipment such as electrical motors are increasingly powered using alternating current (AC) synthesized using semiconductor devices. Desirably, the semiconductors are operated in...
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Although horizontal axis wind turbines currently dominate the wind power industry, their vertical axis counterparts offer several advantages. For example, vertical axis systems are powered by wind com...
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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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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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Inductors and capacitors are fundamental building blocks in many electrical devices and provide energy storage. Inductors store energy in the form of a magnetic field in the vicinity of a coiled condu...
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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 low c...
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As a byproduct of normal operation, electrical circuits can induce unwanted signals, or noise, in other circuits, thereby degrading performance. This problem, known as electromagnetic interference (EM...
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