Patents by Inventor Bingnan Wang

Bingnan Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220123680
    Abstract: A system for controlling an operation of an induction motor (IM). A controller processor detects a spectrum of a current signal from received sensor data using a module. Obtain a number of rotor bars and a number of pole pairs of the IM to identify a principle slot harmonics (PSH) type IM from stored IM data. Use the PSH-type IM to identify a static eccentricity (SE) fault signature signal located at a secondary PSH frequency of the PSH-type IM. Determine a level of signal strength in the spectrum of the current signal at a location of the secondary PSH frequency, and compare to a SE fault table database to obtain a SE fault level of the PSH-type IM. Compare the SE fault level to a database to obtain a SE fault threshold, and if the SE fault level is outside the SE threshold, generate an interrupt command to the controller.
    Type: Application
    Filed: October 15, 2020
    Publication date: April 21, 2022
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Lei Zhou, Bingnan Wang, Chungwei Lin
  • Publication number: 20220123609
    Abstract: An electrical machine that is an outer runner motor having a rotor mounted rotatably about a machine axis, with the rotor rotatively attached to a shaft. A stator assembly having a stator core with a non-ferromagnetic material. An axial-flux yoke with an inner wall rigidly attached on an outer surface of a first edge wall of the stator core, or a radial-flux yoke with a continuous inner wall rigidly attached on a continuous outer wall of the stator core. Wherein the axial-flux yoke or the radial-flux yoke, include laminated sheets and slots. Windings can be positioned in the slots of either the axial-flux stator yoke or the radial-flux stator yoke. Wherein the stator core and the shaft include a spline coupling feature adapted to selectively couple and mate the stator core to the shaft.
    Type: Application
    Filed: October 15, 2020
    Publication date: April 21, 2022
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Hongyu Wang, Lei Zhou, Bingnan Wang
  • Publication number: 20220123607
    Abstract: An axial-flux and radial-flux motor including a rotor mounted rotatably about a machine axis, with the rotor rotatively attached to a shaft. A stator assembly having a core with a non-ferromagnetic material and including a first axial-flux stator yoke with an inner wall rigidly attached on an outer surface of a first edge wall of the core. A second axial-flux stator yoke having an inner wall rigidly attached on an outer surface of a second edge wall of the core. The first and the second axial-flux stator yokes each include an outer wall with slots. A radial-flux stator yoke with slots includes an inner wall rigidly attached on a continuous outer wall of the core. The radial-flux stator yoke and the first and the second axial-flux stator yokes include laminated sheets. Windings positioned in the slots of the first and the second axial-flux stator yokes and the radial-flux stator yoke.
    Type: Application
    Filed: October 15, 2020
    Publication date: April 21, 2022
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Lei Zhou, Bingnan Wang, Hongyu Wang
  • Patent number: 11293986
    Abstract: A system for thermal management of an electric motor, uses an augmented thermal circuit model of the electric motor, which relates temperatures of a set of nodes of the thermal circuit model with the temperature measurements at a first subset of nodes and heat losses of heat sources at a second subset of nodes, for joint estimation of the temperatures at the entire set of nodes and values of the heat losses in the second subset of nodes. The system solves the joint estimation using an estimator/observer. The system outputs one or combination of the values of the temperatures of the set of nodes and the values of the heat losses.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: April 5, 2022
    Assignees: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Bingnan Wang, Yebin Wang, Tong Ma, Chungwei Lin, Taiga Komatsu
  • Publication number: 20220058310
    Abstract: A system for evaluating an electromagnetic performance of a permanent magnet (PM) motor. Parameters update an electromagnetic analytical (EA) model. Each component of the PM motor is associated with regions, and assumptions of the EA model include a relative permeability of regions associated with a rotor core modeled as finite. Calculate a general solution to a governing equation to each region which include unknown coefficients to be determined. Define a set of boundary and interface (B&I) conditions for two neighboring regions, each B&I condition is defined through a set of Maxwell equations using the two neighboring regions sets of assumptions, geometries of the PM motor and electrical and magnetic properties associated with the two neighboring regions. All the unknown coefficients in the general solutions in all regions are solved with a linear system of equations obtained from the B&I conditions between the regions, to solve for a magnetic vector potential.
    Type: Application
    Filed: August 24, 2020
    Publication date: February 24, 2022
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Bingnan Wang, Kyung-Hun Shin
  • Publication number: 20210313851
    Abstract: A motor comprising a shaft, an array of stator assemblies rigidly attached to the shaft, each stator assembly includes a stator yoke having a toroid shape fixed around the shaft and having a number of slots at radial and axis directional faces with windings within the slots of the stator yoke, and a rotor assembly rotatively attached to the shaft to enclose the array of stator assemblies, the rotor assembly has a rotor drum with sections, each section embraces one stator assembly, each section has two axial-flux permanent magnet arrays attached on axial-directional inner surfaces of the section and has one radial-flux permanent magnet array attached on a radial-directional inner surface of the section furthest from the shaft, wherein the axial-flux and the radial-flux permanent magnet arrays with the number of pole pairs equals the number of the stator slots plus or minus the number of stator winding pole pair.
    Type: Application
    Filed: April 3, 2020
    Publication date: October 7, 2021
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Lei Zhou, Bingnan Wang, Chungwei Lin, Dehong Liu, Yebin Wang, Koon Hoo Teo
  • Patent number: 11099101
    Abstract: A system for estimating a severity of a bearing fault in an induction motor, uses a set of filters and a set of quantitative models designed for a set of fault frequencies. The system, upon receiving the measurements of the stator current, extracts the first fault current from the stator current using the first filter, determine the first mutual inductance variation from the first fault current using the first quantitative model, and classify the first mutual inductance variation with the fault severity classifier to determine the severity of a first type of fault in the induction motor. Similarly, the system classifies a second type of fault using the second filter and the second quantitative model. The system outputs one or combination of the severity of the first type of fault in the induction motor and the severity of the second type of fault in the induction motor.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: August 24, 2021
    Assignees: Mitsubishi Electric Research Laboratories, Inc., Mitsubishi Electric Corporation
    Inventors: Bingnan Wang, Shen Zhang, Makoto Kanemaru, Chungwei Lin, Dehong Liu, Koon Hoo Teo
  • Patent number: 11001282
    Abstract: A rail state monitoring apparatus (1) includes: first and second transmission antennas (101, 102) to transmit first and second electric signals to rails (5, 6), respectively; first reception antenna (201) to receive a surface wave (21) of the first electric signal propagated through rail (5) and guided wave (32) of the second electric signal propagated through loop coil (10); second reception antenna (202) to receive surface wave (22) of the second electric signal propagated through rail (6) and guided wave (31) of the first electric signal propagated through loop coil (10); and a processor. The processor obtains received powers of the respective electric signals received by first and second reception antennas (201, 202), determines a rail state from “good”, “rail broken”, “rail crack”, or “rail surface anomaly” based on the received powers, and outputs the rail state as rail state information.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: May 11, 2021
    Assignees: MITSUBISHI ELECTRIC CORPORATION, MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.
    Inventors: Wataru Tsujita, Kenzo Makino, Atsushi Takami, Bingnan Wang
  • Patent number: 10996400
    Abstract: An optical waveguide interferometer that includes a first optical section, a second optical section, and a set of optical waveguides configured to connect the first and second optical sections, such that light propagating between the first optical section and the second optical section passes through each optical waveguide in the set, wherein the set of optical waveguides includes a first optical waveguide having a first length and a first width and a second optical waveguide having a second length and a second width, wherein the second length is greater than the first length, and the second width is greater than the first width.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: May 4, 2021
    Assignees: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Keisuke Kojima, Bingnan Wang, Toshiaki Koike-Akino, Koichi Akiyama, Eiji Yagyu, Satoshi Nishikawa, Kosuke Shinohara
  • Patent number: 10906290
    Abstract: Spacecraft including a spacecraft bus. An additive manufacturing system of the spacecraft bus including at least one extruder for delivering feedstock to print an object outside of the spacecraft bus. A sensor for determining a pose of the spacecraft bus relative to an astronomical body. At least one processor in communication with the additive manufacturing system and the sensor, controls an operation of the additive manufacturing system as a function of the pose of the spacecraft bus, to manufacture the object outside of the spacecraft bus.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: February 2, 2021
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: William Yerazunis, Avishai Weiss, Bingnan Wang
  • Patent number: 10840163
    Abstract: A negative electroluminescent cooling device including a first layer of material; a second layer of material arranged at a non-zero distance from the first layer of material with help of a set of supporters, and an energy source to apply a reverse bias voltage to the first layer of material to cool the second layer of material. The material of the first layer is a semiconductor with a bandgap less or equal to a surface resonant energy of the second layer of material.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: November 17, 2020
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Chungwei Lin, Bingnan Wang, Koon Hoo Teo
  • Publication number: 20200348207
    Abstract: A system for estimating a severity of a bearing fault in an induction motor, uses a set of filters and a set of quantitative models designed for a set of fault frequencies. The system, upon receiving the measurements of the stator current, extracts the first fault current from the stator current using the first filter, determine the first mutual inductance variation from the first fault current using the first quantitative model, and classify the first mutual inductance variation with the fault severity classifier to determine the severity of a first type of fault in the induction motor. Similarly, the system classifies a second type of fault using the second filter and the second quantitative model. The system outputs one or combination of the severity of the first type of fault in the induction motor and the severity of the second type of fault in the induction motor.
    Type: Application
    Filed: July 18, 2019
    Publication date: November 5, 2020
    Applicants: Mitsubishi Electric Research Laboratories, Inc., Mitsubishi Electric Corporation
    Inventors: Bingnan Wang, Shen Zhang, Makoto Kanemaru, Chungwei Lin, Dehong Liu, Koon Hoo Teo
  • Publication number: 20200341062
    Abstract: A system for thermal management of an electric motor, uses an augmented thermal circuit model of the electric motor, which relates temperatures of a set of nodes of the thermal circuit model with the temperature measurements at a first subset of nodes and heat losses of heat sources at a second subset of nodes, for joint estimation of the temperatures at the entire set of nodes and values of the heat losses in the second subset of nodes. The system solves the joint estimation using an estimator/observer. The system outputs one or combination of the values of the temperatures of the set of nodes and the values of the heat losses.
    Type: Application
    Filed: September 10, 2019
    Publication date: October 29, 2020
    Inventors: Bingnan Wang, Yebin Wang, Tong Ma, Chungwei Lin, Taiga Komatsu
  • Patent number: 10795151
    Abstract: An encoder of a terahertz (THz)-based absolute positioning system used for decoding patterns from THz-band measurements. The encoder includes a scale with a multi-layer reflective/transmissive structure having a matrix with rows. Each row of the matrix corresponds to a plurality of patterns, such that each pattern is used to form a measurement. An emitter emits a THz waveform to the scale. A receiver is used to measure amplitudes of the THz waveform reflected from the scale. A memory stores data including predetermined positions of the emitter based on the patterns of the layers from the scale. Wherein one or more processors can determine a position of the emitter from the measurements of the amplitudes received by the receiver, based on the stored data. An output interface can be used to render the position of the emitter.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: October 6, 2020
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Pu Wang, Haoyu Fu, Philip Orlik, Toshiaki Koike-Akino, Rui Ma, Bingnan Wang
  • Patent number: 10797633
    Abstract: A thermal emitter including a substrate and a grating arranged atop the substrate, the grating includes a plurality of equidistant structures having a cross-section with a trapezoid shape. Material of the substrate and the grating converts incoming heat into radiation.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: October 6, 2020
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Bingnan Wang, Chungwei Lin, Jianjian Wang, Koon Hoo Teo
  • Patent number: 10658968
    Abstract: A thermoradiative device for generating power includes a thermoradiative element having a top surface and a bottom surface, wherein the thermoradiative element is a semiconductor material having a bandgap energy Eg. The device includes a thermal conductive element having a first surface and a second surface, wherein the first surface is arranged to face the bottom surface of the thermoradiative element, and the first surface is a structured surface having a periodic structure, wherein the structured surface is separated from the bottom surface with a distance d to establish near-field resonance between the bottom surface and the structured surface. The device further includes supporters configured to bond the thermoradiative element and the thermal conductive element.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: May 19, 2020
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Bingnan Wang, Chungwei Lin, Koon Hoo Teo
  • Publication number: 20200130717
    Abstract: A rail state monitoring apparatus (1) includes: first and second transmission antennas (101, 102) to transmit first and second electric signals to rails (5, 6), respectively; first reception antenna (201) to receive a surface wave (21) of the first electric signal propagated through rail (5) and guided wave (32) of the second electric signal propagated through loop coil (10); second reception antenna (202) to receive surface wave (22) of the second electric signal propagated through rail (6) and guided wave (31) of the first electric signal propagated through loop coil (10); and a processor. The processor obtains received powers of the respective electric signals received by first and second reception antennas (201, 202), determines a rail state from “good”, “rail broken”, “rail crack”, or “rail surface anomaly” based on the received powers, and outputs the rail state as rail state information.
    Type: Application
    Filed: October 24, 2018
    Publication date: April 30, 2020
    Applicants: MITSUBISHI ELECTRIC CORPORATION, MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.
    Inventors: Wataru TSUJITA, Kenzo MAKINO, Atsushi TAKAMI, Bingnan WANG
  • Patent number: 10497821
    Abstract: A thermophotovoltaic (TPV) energy converter includes a thermal emitter to generate photons of energy in response to receiving heat and a thermal receiver arranged at a distance from the thermal emitter. The thermal receiver includes a photovoltaic cell converting the received photons into electric energy. The thermal emitter includes a first layer of material arranged on a surface of the thermal emitter closest to the thermal receiver. The thermal receiver includes a second layer of material arranged on a surface of the thermal receiver closest to the thermal emitter. The first layer of material and the second layer of material have surface resonant frequencies above a bandgap of the photovoltaic cell.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: December 3, 2019
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Chungwei Lin, Bingnan Wang, Koon Hoo Teo
  • Patent number: 10451447
    Abstract: An encoder includes a layered structure including a metal plate, a dielectric layer arranged on the metal plate, and a plurality of metallic components arranged on the dielectric layer to form a pattern of resonant circuits. The encoder includes an emitter to emit a waveform of a resonant frequency to the layered structure and a receiver to measure amplitudes of the waveform reflected from the layered structure. The processor operatively connected to a memory storing data relating positions of the emitter with amplitudes of the reflected waveform determines a position of the emitter from the measurements of the amplitudes based on the data. The encoder includes an output interface to render the position of the emitter.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: October 22, 2019
    Assignees: Mitsubishi Electric Research Laboratories, Inc., Mitsubishi Electric Corpotation
    Inventors: Bingnan Wang, Wataru Tsujita, Kota Sadamoto, Yoshitsugu Sawa
  • Publication number: 20190317315
    Abstract: An encoder of a terahertz (THz)-based absolute positioning system used for decoding patterns from THz-band measurements. The encoder includes a scale with a multi-layer reflective/transmissive structure having a matrix with rows. Each row of the matrix corresponds to a plurality of patterns, such that each pattern is used to form a measurement. An emitter emits a THz waveform to the scale. A receiver is used to measure amplitudes of the THz waveform reflected from the scale. A memory stores data including predetermined positions of the emitter based on the patterns of the layers from the scale. Wherein one or more processors can determine a position of the emitter from the measurements of the amplitudes received by the receiver, based on the stored data. An output interface can be used to render the position of the emitter.
    Type: Application
    Filed: April 12, 2018
    Publication date: October 17, 2019
    Inventors: Pu Wang, Haoyu Fu, Philip Orlik, Toshiaki Koike-Akino, Rui Ma, Bingnan Wang