Wisconsin Alumni Research Foundation

Technology

Variable Magnetization Machine Controller

A variable magnetization machine controller has a current command module, a magnetization module and a reducing current module. The current command module computes a vector current command in a dq axi...
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Robert Lorenz, Chen-Yen Yu, Takashi Fukushige | P130156US01

Technology

Variable Magnetization Machine Controller

A variable magnetization machine controller including a hysteresis control component configured to receive an ideal magnetization state signal, output an actual magnetization signal based on the ideal...
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Robert Lorenz, Chen-Yen Yu, Takashi Fukushige | P140008US01

Technology

Variable Magnetization Machine Controller

A variable magnetization machine control system comprising a controller configured to generate a reversely rotating d-axis/q-axis current vector trajectory during a change in a magnetization state of ...
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Robert Lorenz, Chen-Yen Yu, Takashi Fukushige, Brent Gagas | P140170US01

Technology

Variable Magnetization Machine Controller

A variable magnetization machine control system comprising a controller configured to adjust a d-axis current waveform and a q-axis current waveform in accordance with an operating condition of a vari...
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Robert Lorenz, Brent Gagas, Takashi Fukushige, Takashi Kato | P140171US01

Technology

Permanent Magnet Synchronous Motor

A permanent magnet synchronous motor includes a stator with a stator winding, a rotor with a rotor core rotatable relative to the stator, and a magnetic structure with at least one permanent magnet mo...
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Robert Lorenz, Takashi Fukushige, Apoorva Athavale, Kensuke Sasaki, Takashi Kato | P140361US01

Technology

Sensorless Controller For Electrostatic Machine

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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Daniel Ludois, Aditya Ghule, Peter Killeen | P200015US01

Technology

Electrostatic Motor Having Unipolar Drive

A generator/controller for electrostatic motors exploits properties of a delta-connected electrostatic motor to accommodate high common mode DC offset voltages thus permitting construction of an elect...
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Daniel Ludois, Peter Killeen | P200159US01

Technology

Double Layer Capacitive Coupler

A capacitive coupler provides high coupling capacitance through the use of an electrical double layer formed on opposite plates of the coupler. The coupler can be independent or provide a hydrodynami...
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Daniel Ludois, Kevin Frankforter | P200203US01

Technology

High Power Transfer Through Load Supporting Bearings

A system for power transfer to a movable platform makes use of a capacitive interface in moving elements of load-supporting bearings for power transfer. Tank circuits associated with each bearing incr...
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Daniel Ludois, Jiejian Dai, Skyler Hagen | P160356US02

Technology

Switch Network Of A Multilevel Power Converter Architecture

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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Daniel Ludois, Mahima Gupta, Venkata Giri Venkataramanan, Robert Cuzner | P170314US01

Technology

Variable Frequency Electrostatic Drive

A variable speed drive for an electrostatic motor provides feedback control by conversion of measured current phases provided to the motor into a vector in a rotating rotor framework. This vector is u...
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Daniel Ludois, Baoyun Ge, Aditya Ghule | P170165US01

Technology

Bearing-Less Electrostatic Flywheel

A bearing-less flywheel both exchanges energy with a rotating flywheel using a regenerative controller via a rotating electrostatic field but also suspends the flywheel with an electrostatic field to ...
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Daniel Ludois, Eric Severson | P180324US01

Technology

Controller For Power Converter

A controller includes a torque command value calculation module configured to calculate a torque command based on a speed command of the motor, an output voltage controlling module configured to contr...
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Robert Lorenz, Yang Xu, Ryo Iida, Yukai Wang | P170166US01

Technology

High Force Density Three Pole Magnetic Bearing

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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Eric Severson, Nicholas Hemenway | P190159US01

Technology

Permanent Magnet Synchronous Motor

A permanent magnet synchronous motor includes a stator, a rotor rotatable relative to the stator, and a magnetic structure with a low coercive force magnet and a high coercive force magnet that are ar...
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Robert Lorenz, Apoorva Athavale, Kensuke Sasaki, Takashi Kato, Takashi Fukushige | P150276US01

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