Patents by Inventor Shailesh N. Joshi

Shailesh N. Joshi 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).

  • Patent number: 11685543
    Abstract: A hybrid cooling system of an electric machine is contemplated. The hybrid cooling system comprises a propeller positioned on an exterior of an enclosure, at least one electronic component disposed within the enclosure, and a vapor chamber disposed within the enclosure, wherein the vapor chamber comprises an actuator configured to generate mist from a liquid coolant within the enclosure. In operation, in a first mode, the propeller rotates for generating air that is channeled into the enclosure via fins that are disposed on exterior portions of the enclosure, and in a second mode, the actuator generates mist within the vapor chamber, and the propeller rotates for generating air that is channeled into the enclosure via the fins disposed therein.
    Type: Grant
    Filed: March 24, 2022
    Date of Patent: June 27, 2023
    Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.
    Inventors: Shailesh N. Joshi, Hiroshi Ukegawa
  • Publication number: 20230192316
    Abstract: Systems, methods, and other embodiments described herein relate to charging a battery of an electric vehicle while the electric vehicle is hovering. In one embodiment, a method includes, responsive to determining that an electric vehicle does not include a receiver pad, inserting the receiver pad into the electric vehicle that is hovering in the air at a charging station. The method includes determining a space above a transmitter pad for the electric vehicle to hover based, at least in part, on a location and a size of the transmitter pad. The method includes charging a battery to a threshold value through the receiver pad.
    Type: Application
    Filed: December 22, 2021
    Publication date: June 22, 2023
    Inventors: Shailesh N. Joshi, Yanghe Liu
  • Publication number: 20230191743
    Abstract: A passive thermal management system and methods of using a thermoresponsive hydrogel coating configured to autonomously switch between a heating state and a cooling state based on ambient temperature. At temperature greater than a lower critical solution temperature of the thermoresponsive hydrogel, the thermoresponsive hydrogel coating becomes solar reflective and has enhanced radiative cooling ability to achieve daytime radiative cooling. At temperatures less than the lower critical solution temperature, the thermoresponsive hydrogel coating becomes transparent to facilitate absorption of solar radiation by sun absorber.
    Type: Application
    Filed: December 17, 2021
    Publication date: June 22, 2023
    Applicants: Toyota Motor Engineering & Manufacturing North America, Inc, The Board of Trustees of the University of Illinois
    Inventors: Shailesh N. Joshi, Dajie Xie, Paul Braun
  • Publication number: 20230185075
    Abstract: Systems and methods for adjusting one or more properties of a deformable lens are described herein. The deformable lens includes a photoswitch material that, when irradiated by a radiation, causes a curvature of a surface of the deformable lens to change from a first curvature to a second curvature based on the intensity of the radiation.
    Type: Application
    Filed: December 14, 2021
    Publication date: June 15, 2023
    Inventors: Shailesh N. Joshi, Ercan Mehmet Dede
  • Patent number: 11659697
    Abstract: Methods, apparatuses and systems to provide for technology to that includes a plurality of transistors including first transistors and second transistors. The first transistors are disposed opposite the second transistors in a lateral direction with a first space between the first transistors and the second transistors in the lateral direction. A gate driver is electrically connected to the plurality of transistors to operate the plurality of transistors. The gate driver has a first portion disposed between the first transistors and the second transistors in the first space.
    Type: Grant
    Filed: October 29, 2020
    Date of Patent: May 23, 2023
    Assignee: Toyota Motor Engineering and Manufacturing North America, Inc.
    Inventors: Hitoshi Fujioka, Shailesh N. Joshi, Feng Zhou, Danny J. Lohan
  • Publication number: 20230150383
    Abstract: A panel for wireless charging of an electric vehicle includes a metamaterial panel with a first shape and a second shape different than the first shape. The metamaterial panel is configured to be positioned between a transmitter coil of a wireless power transfer station (WPTS) and a receiver coil of the electric vehicle during wireless charging of the electric vehicle and change between the first shape and the second shape as a function of at least one of a size of the transmitter coil, a size of the receiver coil, and a distance between the transmitter coil and the receiver coil. A robot with at least one of a robotic arm and a robotic buggy can be included and the metamaterial panel can be coupled to the robot. And the robot is configured to position the metamaterial panel between the transmitter coil of the WPTS and the receiver coil of the electric vehicle during wireless charging of the electric vehicle.
    Type: Application
    Filed: November 15, 2021
    Publication date: May 18, 2023
    Inventors: Yanghe Liu, Shailesh N. Joshi
  • Patent number: 11647612
    Abstract: An integrated power electronic assembly includes a power electronic device, a cooling assembly offset from and thermally coupled to a second edge of the power electronic device, and a thermal spreader offset from and thermally coupled to a first edge of the power electronic device. The first edge of the power electronic device is opposite the second edge of the power electronic device, and the thermal spreader is thermally coupled to the cooling assembly.
    Type: Grant
    Filed: February 1, 2021
    Date of Patent: May 9, 2023
    Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.
    Inventors: Hitoshi Fujioka, Shailesh N. Joshi, Hiroshi Ukegawa
  • Publication number: 20230133184
    Abstract: An aerial vehicle includes a body and a wireless charging receiver pad connected to the body, whereby the aerial vehicle is configured to be wirelessly charged when parked above a wireless charging transmitter pad. The aerial vehicle includes landing gear connected to the body and extending underneath the body. The landing gear is configured for actuation to control the location of the receiver pad with respect to the transmitter pad.
    Type: Application
    Filed: October 29, 2021
    Publication date: May 4, 2023
    Inventors: Yanghe Liu, Shailesh N. Joshi
  • Publication number: 20230138653
    Abstract: Evaporator assemblies, vapor chamber assemblies, and methods for fabricating a vapor chamber are disclosed. In one embodiment, an evaporator assembly for a vapor chamber includes an evaporator surface, an array of posts extending from the evaporator surface, and an array of vapor vents within the evaporator surface. Each vapor vent of the array of vapor vents is configured as a depression within the evaporator surface. The evaporator assembly further includes a porous layer disposed on the evaporator surface, the array of posts, and the array of vapor vents.
    Type: Application
    Filed: November 3, 2021
    Publication date: May 4, 2023
    Applicant: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Shailesh N. Joshi, Danny Lohan
  • Patent number: 11638359
    Abstract: Methods, systems, and apparatus for a module electronics package. The modular electronics package includes a main circuit. The first main circuit board is configured to provide electrical interconnections to form an electric circuit. The modular electronics package includes a first power module. The first power module includes a first power device card and a first expansion slot. The first power device card is configured to be inserted into the first expansion slot and to be electrically coupled to the main circuit board via the first expansion slot.
    Type: Grant
    Filed: May 5, 2021
    Date of Patent: April 25, 2023
    Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.
    Inventors: Danny Lohan, Shailesh N. Joshi
  • Publication number: 20230104896
    Abstract: Systems, methods, computer-readable media, techniques, and methodologies are disclosed for performing fault detection and prediction for power electronics and switching devices for power electronics. Systems and methods can determine, using a machine learning model, a prediction for a value of a first switching parameter of a switching device, the prediction based on the present value of a second switching parameter of a switching device and a prior value of the first switching parameter. Systems and methods disclosed herein can further determine a residual comprising the difference between the prediction and an actual value of the switching parameter, generate a test statistic based on the residual, and compare the test statistic to a first threshold value. Systems and methods disclosed herein can determine the presence of a fault in the switching device based on a comparison of the test statistic to a threshold value.
    Type: Application
    Filed: October 1, 2021
    Publication date: April 6, 2023
    Inventors: KRISHNA PATTIPATI, MUHAMED K. FAROOQ, QIAN YANG, ALI BAZZI, SHAILESH N. JOSHI, HIROSHI UKEGAWA
  • Publication number: 20230106360
    Abstract: Systems and methods are disclosed for performing fault detection and prediction for power electronics and switching devices for power electronics, such as power inverters. Systems and methods disclosed herein can include determining, by a partial least squares model that evaluates values for one or more switching parameters for a switching device, the one or more switching parameters selected from a first set of switching parameters, a predicted value for the on-state current Ids of the switching device. The predicted value for the on-state current Ids can be based on the values of the one or more switching parameters for the switching device. Systems and methods disclosed herein can determine a residual comprising the difference between the predicted value for the another switching parameter of the switching device and an actual value of the predicted value for the another switching parameter, and generate a test statistic based on the residual.
    Type: Application
    Filed: October 1, 2021
    Publication date: April 6, 2023
    Inventors: KRISHNA PATTIPATI, MUHAMED K. FAROOQ, QIAN YANG, ALI BAZZI, SHAILESH N. JOSHI, HIROSHI UKEGAWA
  • Patent number: 11602743
    Abstract: A method of fabricating a carbon nanotube (“CNT”) array includes providing a substrate with a CNT catalyst disposed on a surface of the substrate, heating the CNT catalyst to an annealing temperature, exposing the CNT catalyst to a CNT precursor for an exposure period to pre-load the CNT catalyst, and exposing the pre-loaded CNT catalyst to a carbon source for a growth period to form the CNT array. The formed CNT array comprises a plurality of CNT bundles that are aligned with one another in an alignment direction. At least one of the plurality of bundles comprises an average structural factor of 1.5 or less along an entirety of the length thereof.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: March 14, 2023
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Vanderbilt University
    Inventors: Yuyang Song, Shailesh N. Joshi, Piran R. Kidambi, Peifu Cheng
  • Patent number: 11603975
    Abstract: Systems, apparatus, methods, and computer program products to enhance the operation of a light system. A light apparatus includes an optical member to project light, one or more elastically deformable position adjustment members, and one or more light sources. The elastically deformable position adjustment members are operable to adjust a mounting position of the optical member, and include one or more photochromatic regions to facilitate movement of the one or more elastically deformable position adjustment members from a contracted state to an expanded state in response to exposure to UV light. The one or more light sources operable to selectively emit illuminating UV light in a direction that contacts the one or more photochromatic regions to thereby adjust a mounting position of the optical member and change a direction of light emitted by the lighting apparatus.
    Type: Grant
    Filed: January 28, 2022
    Date of Patent: March 14, 2023
    Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.
    Inventors: Shailesh N Joshi, Ercan M Dede
  • Patent number: 11602087
    Abstract: A cold plate includes a first cooling surface comprising a first cooling structure bonded to an inner surface of the first cooling surface, a second cooling surface comprising a second cooling structure bonded to an inner surface of the second cooling surface, a manifold comprising an internal cavity defined by a first length, a first width, and a first height, and a flow divider defined by a second length, a second width, and a second height. The manifold is enclosed by the first cooling surface and the second cooling surface on opposing surfaces of the manifold separated by the first height. The flow divider is positioned within the internal cavity of the manifold. The flow divider supports and separates the first cooling structure and the second cooling structure by a portion of the second height of the flow divider.
    Type: Grant
    Filed: February 2, 2021
    Date of Patent: March 7, 2023
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.
    Inventors: Feng Zhou, Shohei Nagai, Shailesh N. Joshi, Hitoshi Fujioka, Danny J. Lohan, Hiroshi Ukegawa, Ercan Mehmet Dede
  • Publication number: 20230045339
    Abstract: A method to control the density of a three-dimensional photonic crystal template involves changing the irradiation time from at least four laser beams to yield a periodic percolating matrix of mass and voids free of condensed matter from a photoresist composition. The photoresist composition includes a photoinitiator at a concentration where the dose or irradiation is controlled by the irradiation time and is less than the irradiation time that would convert all photoinitiator to initiating species such that the density of the three-dimensional photonic crystal template differs for different irradiation times. A deposition of reflecting or absorbing particles can be patterned on the surface of the photoresist composition to form a template with varying densities above different areas of the substrate.
    Type: Application
    Filed: August 5, 2021
    Publication date: February 9, 2023
    Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., The Board of Trustees of the University of Illinois
    Inventors: Shailesh N. Joshi, Gaurav Singhal, Paul Vannest Braun, Danny J. Lohan, Kai-Wei Lan
  • Publication number: 20230044483
    Abstract: A method of decomposing a cured aromatic epoxy resin uses a molten salt bath at less than about 350° C. The molten salt bath includes a plurality of alkali metal hydroxides. The cured aromatic epoxy resin can be in intimate physical contact with a metal or alloy. The cured aromatic epoxy resin can be patterned by a lithographic method. The lithographic method can be multibeam interference lithography to form a three-dimensional photonic crystal template on a conductive substrate for electrodeposition of metal. Contacting the three-dimensional photonic crystal template with the electrodeposited metal with the molten salt bath can form a metal matrix device displaying a periodic pattern that is the inverse of the periodic pattern of the decomposed three-dimensional photonic crystal template.
    Type: Application
    Filed: August 5, 2021
    Publication date: February 9, 2023
    Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., The Board of Trustees of the University of Illinois
    Inventors: Shailesh N. Joshi, Gaurav Singhal, Paul Vannest Braun, Danny J. Lohan, Kai-Wei Lan
  • Publication number: 20230044343
    Abstract: A method to form a three-dimensional photonic crystal template with a gradient structure involves irradiating a photoresist composition of a thickness of at least 15 ?m from at least four laser beams to yield a periodic patterned with a percolating matrix of mass in constructive volumes of a cured photoresist composition and destructive volumes of voids free of condensed matter where the proportion of constructive volume displays a gradient from the irradiated surface to the substrate after development. For a given light intensity, photoinitiator concentration in the photoresist composition, and a given thickness, by irradiating for a relatively short period, a three-dimensional photonic crystal template displaying a gradient having greater constructive volume proximal the air interface forms and a relatively long irradiation period results in a gradient having greater constructive volume proximal the substrate.
    Type: Application
    Filed: August 5, 2021
    Publication date: February 9, 2023
    Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., The Board of Trustees of the University of Illinois
    Inventors: Shailesh N. Joshi, Gaurav Singhal, Paul Vannest Braun, Danny J. Lohan, Kai-Wei Lan
  • Publication number: 20230042586
    Abstract: A three-dimensional photonic crystal template on a reflective substrate displays a periodic patterned from multibeam interference lithography with constructive volumes of a cured photoresist composition and destructive volumes that are voids free of mass containing defects and where the reflective substrate is conductive. A method to generate the three-dimensional photonic crystal template includes using at least four laser beams of unequal intensity, oriented such that a dose of light controlled by the irradiation time generates the periodic pattern with a small dose, where the light reflected from the substrate is insufficient to activate a threshold quantity of photoinitiator in the destructive volumes for the formation of any anomalous condensed matter in the intended void volume.
    Type: Application
    Filed: August 5, 2021
    Publication date: February 9, 2023
    Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., The Board of Trustees of the University of Illinois
    Inventors: Shailesh N. Joshi, Gaurav Singhal, Paul Vannest Braun, Danny J. Lohan, Kai-Wei Lan
  • Patent number: 11573877
    Abstract: Systems and methods for detecting an anomaly in a power semiconductor device are disclosed. A system includes a server computing device and one or more local components communicatively coupled to the server computing device. Each local component includes sensors positioned adjacent to the power semiconductor device for sensing properties thereof. Each local component receives data corresponding to one or more sensed properties of the power semiconductor device from the sensors and transmits the data to the server computing device. The server computing device utilizes the data, via a machine learning algorithm, to generate a set of eigenvalues and associated eigenvectors and select a selected set of eigenvalues and associated eigenvectors. Each local component conducts a statistical analysis of the selected set of eigenvalues and associated eigenvectors to determine that the data is indicative of the anomaly.
    Type: Grant
    Filed: July 16, 2021
    Date of Patent: February 7, 2023
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., University of Connecticut
    Inventors: Ercan M. Dede, Shailesh N. Joshi, Lingyi Zhang, Weiqiang Chen, Krishna Pattipatti, Ali M. Bazzi