A first radial force value and a second radial force value is received by a radial magnetic bearing controller. Coefficients are computed for a first equation using the first and second radial force v...
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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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Diesel compression ignition engines offer higher efficiency and lower CO2 emissions than their gasoline spark ignition counterparts; however, controlling NOx and soot emissions while achieving high ef...
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The vernier permanent magnet (VPM) machine first appeared about 20 years ago. This motor has the potential to create torque well beyond other types of permanent magnet machines and compete with rare e...
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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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As of 2016, 39% of the total 614,387 bridges in the US had exceed their design lives. In China, almost 10% of its 779,159 bridges are classified as structurally deficient. Other countries in South Ame...
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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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Despite recent advances in additive manufacturing, especially rapid plastic prototyping, there is still a need for better 3-D metal printers. Current techniques are relatively slow and not up to the t...
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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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“Rectennas” are antennas that can receive radio signals and rectify them to generate electrical power for wireless power transfer. Potential applications for rectennas range from large-scale power...
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Nanotubes and nanowires are used extensively to tailor material properties. However, wide implementation of their extraordinary characteristics has been difficult due to their 1-D geometry and limited...
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Mechanical engineers commonly employ a software modeling tool called finite element analysis (FEA) to virtually simulate a design prior to physical prototyping.  In FEA, a three dimensional (3-D) mod...
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Biological microarrays are valuable tools that enable the parallel analysis of thousands of different analytes. However, one of the chief problems with existing protein microarrays is the nonspecific ...
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Permanent magnet (PM) machines are used in today’s hybrid and electric vehicles due to their ideal performance characteristics. However, due to cost uncertainty and overseas sourcing, other types of...
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Photoreceptors are specialized cells that capture and convert light into signals that can be processed by the retina and visual centers of the brain. Supportive cells called the retinal pigment epithe...
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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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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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Permanent magnet machines (PMs) are common in electric and hybrid vehicles, renewable energy and other industrial applications. These utilize permanent magnets made from rare earth materials (such as ...
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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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‘Electrostatic’ motors and generators make torque using moving plates and electrical fields. They are lighter and cheaper than conventional electromagnetic designs that rely on iron, copper windin...
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Electrostatic machines are attracting more and more interest because they are lighter and cheaper than conventional electromagnetic designs that rely on semi-precious metals and rare earth materials. ...
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Lamination includes various techniques of manufacturing materials in multiple layers or ‘plies.’ Laminates are commonly used in the automotive, aerospace, medical and consumer industries. A simple...
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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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High speed electric machines are needed in many applications including HVAC, industry, flywheels, fans, fuel-efficient vehicles, aircraft and much more.Flux-switching permanent magnet (FSPM) machines ...
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