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 l...
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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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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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An adjustable speed drive (ASD) is a power electronics device that controls the speed of machinery. These devices also save energy for industrial processes that require adjustable speed or controlling...
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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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Permanent magnet synchronous machines are one type of electrical rotating machine (i.e., motor or generator), which are common in hybrid vehicles and wind turbines. Although these machines have a high...
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Many commonly used machines require moving and stationary parts to generate electricity. Conventional rotating electrical machines utilize magnetic fields and/or a change in inductance between moving ...
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The two-switch phase leg – a basic building block topology for electrical power inverters – consists of a high- and a low-side semiconductor switch spanning a DC voltage source. Dead time ...
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