A variable speed drive for an electrostatic motor provides feedback control according to rotor position and/or rotor rotational rate deduced from back currents (back-MMF). Extraction of the back curr...
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An electrical rotating machine, such as a generator or motor, communicates power from a stationary location to the rotating rotor of the rotating machine via opposed pairs of capacitor plates, one pla...
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A machine drive includes a suspension force inverter, a torque inverter, and a capacitor. The suspension force inverter provides suspension force electrical signals to suspension force electrical term...
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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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An electrostatic machine employs a high dielectric fluid comprised of a dielectric liquid with suspended dielectric particles. Electrorheological effects are minimized through small particle sizes and...
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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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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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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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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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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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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) machi...
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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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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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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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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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A carburetor is used to generate the air/fuel mixture in engines by drawing air through a venturi during the intake stroke of an engine. The influx of air lowers the pressure, drawing fuel from a smal...
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Existing power machines provide the ability to capture power from a mechanically rotating source, such as a wind turbine. One example of such power machines is the synchronous motor, which contains a ...
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Permanent magnet synchronous motors (PMSM) provide torque through the interaction of a magnetic field generated by one or more armature coils and one or more permanent magnetic elements. These motors ...
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A continuing need exists for compact, efficient, inexpensive electrical machines with high torque capability over a large speed range and the ability to control machine speed. This need is particularl...
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