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47 Results for 'Electric machines'
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Technology
CURRENT SOURCE INVERTER USING BIDIRECTIONAL SWITCHES WITH BIDIRECTIONAL POWER FLOW CAPABILITY
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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Thomas Jahns, Hang Dai, Bulent Sarlioglu, Renato Amorim Torres, Woongkul Lee | P210209US02
Technology
ELECTRIC MOTOR PROVIDING BEARING-FORCE UNLOADING
UW-Madison researchers have developed a hybrid electric machine bearing system that uses both gas and electromagnetic shaft support. The windings of the electric motor are used to reduce the loading o...
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Eric Severson, Nathan Petersen | P230289US01
Technology
BEARINGLESS ELECTRICAL MACHINES WITH REDUCED NUMBER OF INVERTERS
UW researchers invented a novel twin bearingless machine drive configuration that uses a reduced number of inverters. Twin bearingless machine configurations have two bearingless machines rated for ha...
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Eric Severson, Zhouzhou Wang | P220108US01
Technology
BALANCED CURRENT-SOURCE INVERTER
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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Thomas Jahns, Hang Dai, Bulent Sarlioglu, Renato Amorim Torres | P210208US01
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
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
Method And Apparatus For Integrating Current Sensors In A Power Semiconductor Module
An improved system for measuring current within a power semiconductor module is disclosed, where the system is integrated within the power module. The system includes a point field detector sensing a ...
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Robert Lorenz, Minhao Sheng, Hiroyuki Nogawa, Yoshinari Ikeda, Eiji Machizuki | P160204US01
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, 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
Technology
Magnetization State Control Method And Magnetization State Control Device
A magnetization state control method for a variable magnetization machine, the method includes generating a flux linkage vector while changing a magnetization state of the variable magnetization machi...
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Robert Lorenz, Brent Gagas, Kensuke Sasaki, Takashi Kato, Takashi Fukushige | P150275US01
Technology
Integrated Rotor for an Electrical Machine and Compressor
An electric machine includes a rotor, a stator, and a winding. The rotor includes a rotor core and blades extending from the rotor core. Each blade is curved in an axial direction along the rotor core...
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Bulent Sarlioglu, Yingjie Li | P140123US01
Technology
Controller For Power Converter And Motor Driving Systems
A controller for a power convertor includes: a torque command value calculation module to calculate a first torque command value to a power convertor; a torque command limit module to receive the firs...
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Robert Lorenz, Yang Xu, Chikara Morito | P180332US01
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
Electrostatic Rotating-Machine Employing Dielectric Substrates With Surface Conductors
An electrostatic rotating electrical machine employs axially extending electrically conductive electrodes on a rotor interacting with a corresponding set of axially extending electrodes on a stator, w...
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Daniel Ludois, Baoyun Ge | P170167US01
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
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
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
Vernier Machine With Shaped Permanent Magnet Groups
An electric machine includes a rotor, permanent magnets, a stator, and a stator winding wound about a plurality of teeth to form a number of stator magnetic poles. The rotor includes a rotor core and ...
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Thomas Lipo, Wenbo Liu | P180005US01
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
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
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
Fixed Gap Capacitive Power Transfer Coupling For Wound Field Synchronous Machines
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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Daniel Ludois, Skyler Hagen | P190295US01