Patents by Inventor Robert James Ramm

Robert James Ramm 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: 20260068669
    Abstract: A method of making an inverter comprising: a substrate; a first transistor in thermal contact with the substrate, wherein the transistor comprises a gate; the substrate sintered to a heat sink through a sintered layer; an encapsulant that at least partially encapsulates the first transistor; and a Kelvin connection to the transistor gate.
    Type: Application
    Filed: November 4, 2025
    Publication date: March 5, 2026
    Inventors: Wenjun Liu, Robert James Ramm, Alan David Tepe, Colin Kenneth Campbell, Dino Sasaridis
  • Publication number: 20240063084
    Abstract: A transistor package comprising: a substrate; a first transistor in thermal contact with the substrate, wherein the transistor comprises a gate; the substrate sintered to a heat sink through a sintered layer; an encapsulant that at least partially encapsulates the first transistor; and a Kelvin connection to the transistor gate.
    Type: Application
    Filed: October 31, 2023
    Publication date: February 22, 2024
    Inventors: Wenjun Liu, Robert James Ramm, Alan David Tepe, Colin Kenneth Campbell, Dino Sasaridis
  • Patent number: 11837523
    Abstract: A transistor package comprising: a substrate; a first transistor in thermal contact with the substrate, wherein the transistor comprises a gate; the substrate sintered to a heat sink through a sintered layer; an encapsulant that at least partially encapsulates the first transistor; and a Kelvin connection to the transistor gate.
    Type: Grant
    Filed: October 14, 2022
    Date of Patent: December 5, 2023
    Assignee: Tesla, Inc.
    Inventors: Wenjun Liu, Robert James Ramm, Alan David Tepe, Colin Kenneth Campbell, Dino Sasaridis
  • Publication number: 20230171909
    Abstract: A semiconductor device includes: a housing; a substrate inside the housing; first and second semiconductor circuits on the substrate; and first and second planar terminals electrically connected to the first and second semiconductor circuits, respectively, the first and second planar terminals stacked on top of each other, wherein each of the first and second planar terminals extends away from the housing.
    Type: Application
    Filed: January 27, 2023
    Publication date: June 1, 2023
    Inventors: Wenjun Liu, Robert James Ramm, Colin Campbell
  • Publication number: 20230037192
    Abstract: A transistor package comprising: a substrate; a first transistor in thermal contact with the substrate, wherein the transistor comprises a gate; the substrate sintered to a heat sink through a sintered layer; an encapsulant that at least partially encapsulates the first transistor; and a Kelvin connection to the transistor gate.
    Type: Application
    Filed: October 14, 2022
    Publication date: February 2, 2023
    Applicant: Tesla, Inc.
    Inventors: Wenjun Liu, Robert James Ramm, Alan David Tepe, Colin Kenneth Campbell, Dino Sasaridis
  • Patent number: 11570921
    Abstract: A semiconductor device includes: a housing; a substrate inside the housing; first and second semiconductor circuits on the substrate; and first and second planar terminals electrically connected to the first and second semiconductor circuits, respectively, the first and second planar terminals stacked on top of each other, wherein each of the first and second planar terminals extends away from the housing.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: January 31, 2023
    Assignee: Tesla, Inc.
    Inventors: Wenjun Liu, Robert James Ramm, Colin Campbell
  • Patent number: 11476179
    Abstract: A transistor package comprising: a substrate; a first transistor in thermal contact with the substrate, wherein the transistor comprises a gate; the substrate sintered to a heat sink through a sintered layer; an encapsulant that at least partially encapsulates the first transistor; and a Kelvin connection to the transistor gate.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: October 18, 2022
    Assignee: Tesla, Inc.
    Inventors: Wenjun Liu, Robert James Ramm, Alan David Tepe, Colin Kenneth Campbell, Dino Sasaridis
  • Patent number: 10886814
    Abstract: A method of fabricating a stator for an electric motor is provided. The method includes providing a plurality of stator laminations. Each stator lamination of the plurality of stator laminations is a copy of the same stator lamination pattern. The method further includes stacking the plurality of stator laminations in a sequence along an axis, comprising periodically varying rotational orientations of the stator laminations in the sequence. The method further includes joining the plurality of stator laminations as stacked in the sequence.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: January 5, 2021
    Assignee: GALATECH, INC.
    Inventors: Wenjun Liu, Robert James Ramm
  • Patent number: 10574151
    Abstract: The various implementations described herein include inverter devices and systems. In one aspect, an inverter includes: a case; a capacitor within the case having a first terminal and a second terminal; a first bus bar including a first portion within the case and a second portion extending from the case to contact a first transistor; a second bus bar including a first portion situated in the case and a second portion extending from the case to contact a second transistor; and a phase-out bus bar including a first portion situated in the case, a second portion extending from the case to contact the first transistor, and a third portion extending from the case to contact the second transistor.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: February 25, 2020
    Assignee: GALATECH, INC.
    Inventors: Wenjun Liu, Robert James Ramm
  • Publication number: 20190372409
    Abstract: A drive unit for an electric vehicle includes a stator having an axis extending through an opening in the middle of the stator, a case, a clamp to fasten the stator within the case and a fastener. The case includes a boss with an opening having an axis and a ramp adjacent to the boss and slanting toward the axis of the stator as it extends away from the opening of the boss. The clamp includes a first portion to contact a side of the stator to provide a radial force to the stator and a second portion to contact an end of the stator to provide an axial force to the stator. The fastener is inserted through the clamp into the boss. The slanted edge is configured to slide against the ramp when the fastener is inserted into the boss, to generate the radial force.
    Type: Application
    Filed: May 30, 2018
    Publication date: December 5, 2019
    Inventors: Wenjun Liu, Robert James Ramm
  • Publication number: 20190348889
    Abstract: A method of fabricating a stator for an electric motor is provided. The method includes providing a plurality of stator laminations. Each stator lamination of the plurality of stator laminations is a copy of the same stator lamination pattern. The method further includes stacking the plurality of stator laminations in a sequence along an axis, comprising periodically varying rotational orientations of the stator laminations in the sequence. The method further includes joining the plurality of stator laminations as stacked in the sequence.
    Type: Application
    Filed: May 8, 2018
    Publication date: November 14, 2019
    Inventors: Wenjun Liu, Robert James Ramm
  • Publication number: 20190260302
    Abstract: The various implementations described herein include inverter devices and systems. In one aspect, an inverter includes: a case; a capacitor within the case having a first terminal and a second terminal; a first bus bar including a first portion within the case and a second portion extending from the case to contact a first transistor; a second bus bar including a first portion situated in the case and a second portion extending from the case to contact a second transistor; and a phase-out bus bar including a first portion situated in the case, a second portion extending from the case to contact the first transistor, and a third portion extending from the case to contact the second transistor.
    Type: Application
    Filed: March 19, 2019
    Publication date: August 22, 2019
    Inventors: Wenjun Liu, Robert James Ramm
  • Patent number: 10304770
    Abstract: A semiconductor device includes housing, a substrate, a first semiconductor die, a second semiconductor die, a first terminal, and a second terminal. The first terminal in a first terminal plane couples to the first semiconductor die. The second terminal has a contact portion in a contact portion plane within the housing that couples to the second semiconductor die, a main portion in a main portion plane partially within the housing, the main portion plane substantially parallel to and offset from the first terminal plane, and the main portion plane substantially parallel to and offset from the contact portion plane, and an offsetting portion within the housing and that connects the contact portion to the main portion. At least some of the main portion of the second terminal overlaps the first terminal and the first terminal and the main portion of the second terminal extend from the housing in a same direction.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: May 28, 2019
    Assignee: Tesla, Inc.
    Inventors: Wenjun Liu, Robert James Ramm, Colin Kenneth Campbell
  • Patent number: 10290616
    Abstract: A packaged semiconductor device has a plurality of leads. A respective lead is to be welded to an electrical coupling that has a substantially rectangular end section. The end section has a width that is greater than a width of the respective lead. The respective lead is aligned within the width of the end section, such that the respective lead extends in a direction substantially perpendicular to the width of the end section. With the respective lead and the end section aligned, the respective lead is welded to the end section.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: May 14, 2019
    Assignee: GALATECH, INC.
    Inventors: Wenjun Liu, Robert James Ramm
  • Patent number: 10236786
    Abstract: The various implementations described herein include inverter devices and systems. In one aspect, an inverter includes: a case; a capacitor within the case having a first terminal and a second terminal; a first bus bar including a first portion within the case and a second portion extending from the case to contact a first transistor; a second bus bar including a first portion situated in the case and a second portion extending from the case to contact a second transistor; and a phase-out bus bar including a first portion situated in the case, a second portion extending from the case to contact the first transistor, and a third portion extending from the case to contact the second transistor.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: March 19, 2019
    Assignee: GALATECH, INC.
    Inventors: Wenjun Liu, Robert James Ramm
  • Patent number: 10211755
    Abstract: The various implementations described herein include inverter devices and systems. In one aspect, an inverter includes: a case; a capacitor within the case having a first terminal and a second terminal; a first bus bar including a first portion within the case and a second portion extending from the case to contact a first transistor; a second bus bar including a first portion situated in the case and a second portion extending from the case to contact a second transistor; and a phase-out bus bar including a first portion situated in the case, a second portion extending from the case to contact the first transistor, and a third portion extending from the case to contact the second transistor.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: February 19, 2019
    Assignee: GALATECH, INC.
    Inventors: Wenjun Liu, Robert James Ramm
  • Publication number: 20190051638
    Abstract: A packaged semiconductor device has a plurality of leads. A respective lead is to be welded to an electrical coupling that has a substantially rectangular end section. The end section has a width that is greater than a width of the respective lead. The respective lead is aligned within the width of the end section, such that the respective lead extends in a direction substantially perpendicular to the width of the end section. With the respective lead and the end section aligned, the respective lead is welded to the end section.
    Type: Application
    Filed: January 3, 2018
    Publication date: February 14, 2019
    Inventors: Wenjun Liu, Robert James Ramm
  • Publication number: 20190052184
    Abstract: The various implementations described herein include inverter devices and systems. In one aspect, an inverter includes: a case; a capacitor within the case having a first terminal and a second terminal; a first bus bar including a first portion within the case and a second portion extending from the case to contact a first transistor; a second bus bar including a first portion situated in the case and a second portion extending from the case to contact a second transistor; and a phase-out bus bar including a first portion situated in the case, a second portion extending from the case to contact the first transistor, and a third portion extending from the case to contact the second transistor.
    Type: Application
    Filed: December 4, 2017
    Publication date: February 14, 2019
    Inventors: Wenjun Liu, Robert James Ramm
  • Publication number: 20190052188
    Abstract: The various implementations described herein include inverter devices and systems. In one aspect, an inverter includes: a case; a capacitor within the case having a first terminal and a second terminal; a first bus bar including a first portion within the case and a second portion extending from the case to contact a first transistor; a second bus bar including a first portion situated in the case and a second portion extending from the case to contact a second transistor; and a phase-out bus bar including a first portion situated in the case, a second portion extending from the case to contact the first transistor, and a third portion extending from the case to contact the second transistor.
    Type: Application
    Filed: April 12, 2018
    Publication date: February 14, 2019
    Inventors: Wenjun Liu, Robert James Ramm
  • Patent number: 10199804
    Abstract: A busbar locating component includes: one or more first attachments configured for attaching a busbar layer to the busbar locating component; one or more bays each configured to contain and position an assembly of transistors essentially perpendicular to the busbar layer for connection; and a plurality of slots, each slot configured to contain and position a busbar relative to the busbar layer for connection.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: February 5, 2019
    Assignee: Tesla, Inc.
    Inventors: Robert James Ramm, Dino Sasaridis, Colin Campbell, Wenjun Liu