公开(公告)号：US11088582B2

公开(公告)日：2021-08-10

申请号：US15827363

申请日：2017-11-30

Applicant: Tesla, Inc.

Inventor： Scott Michael Graves ,  Diego Alberto Silva Rodriguez ,  Tyler Nils Grendahl ,  Alexander Hain

IPC: H02K1/32 ,  H02K5/173 ,  H02K7/08 ,  H02K11/40 ,  H02K9/193 ,  H02K9/197 ,  H02K1/16 ,  H02K1/27 ,  H02K3/12 ,  H02K5/16 ,  H02K11/00

Abstract: An electric motor includes a case, a stator having stator windings, a rotor having a rotor shaft, and at least one main rotor bearing coupling the rotor shaft to the case. Common mode charge builds up on the rotor due to imbalances of the stator. The at least one main rotor bearing has a first electrical resistance between the rotor shaft and the case. The electric motor further includes a rotor discharge bearing coupling the rotor shaft to the case. The rotor discharge bearing has a second electrical resistance between the rotor shaft and the case that is less than the first electrical resistance, causing the common mode charge to discharge through the rotor discharge bearing. In a differing embodiment, a rotor discharge brush coupled between the case and the rotor shaft along the longitudinal axis of the rotor shaft discharges the common mode charge.

公开(公告)号：US20210367467A1

公开(公告)日：2021-11-25

申请号：US17444507

申请日：2021-08-05

Applicant: Tesla, Inc.

Inventor： Scott Michael Graves ,  Diego Alberto Silva Rodriguez ,  Tyler Nils Grendahl ,  Alexander Hain

IPC: H02K1/32 ,  H02K5/173 ,  H02K7/08 ,  H02K11/40 ,  H02K9/193 ,  H02K9/197 ,  H02K1/16 ,  H02K1/27 ,  H02K3/12 ,  H02K5/16

Abstract: An electric motor includes a case, a stator having stator windings, a rotor having a rotor shaft, and at least one main rotor bearing coupling the rotor shaft to the case. Common mode charge builds up on the rotor due to imbalances of the stator. The at least one main rotor bearing has a first electrical resistance between the rotor shaft and the case. The electric motor further includes a rotor discharge bearing coupling the rotor shaft to the case. The rotor discharge bearing has a second electrical resistance between the rotor shaft and the case that is less than the first electrical resistance, causing the common mode charge to discharge through the rotor discharge bearing. In a differing embodiment, a rotor discharge brush coupled between the case and the rotor shaft along the longitudinal axis of the rotor shaft discharges the common mode charge.

公开(公告)号：US11757320B2

公开(公告)日：2023-09-12

申请号：US17444507

申请日：2021-08-05

Applicant: Tesla, Inc.

Inventor： Scott Michael Graves ,  Diego Alberto Silva Rodriguez ,  Tyler Nils Grendahl ,  Alexander Hain

IPC: H02K1/32 ,  H02K5/173 ,  H02K7/08 ,  H02K11/40 ,  H02K9/193 ,  H02K9/197 ,  H02K1/16 ,  H02K1/274 ,  H02K3/12 ,  H02K5/16 ,  H02K11/00

CPC classification number: H02K1/32 ,  H02K1/16 ,  H02K1/274 ,  H02K3/12 ,  H02K5/16 ,  H02K5/1732 ,  H02K7/083 ,  H02K9/193 ,  H02K9/197 ,  H02K11/40 ,  H02K11/00

Abstract: An electric motor includes a case, a stator having stator windings, a rotor having a rotor shaft, and at least one main rotor bearing coupling the rotor shaft to the case. Common mode charge builds up on the rotor due to imbalances of the stator. The at least one main rotor bearing has a first electrical resistance between the rotor shaft and the case. The electric motor further includes a rotor discharge bearing coupling the rotor shaft to the case. The rotor discharge bearing has a second electrical resistance between the rotor shaft and the case that is less than the first electrical resistance, causing the common mode charge to discharge through the rotor discharge bearing. In a differing embodiment, a rotor discharge brush coupled between the case and the rotor shaft along the longitudinal axis of the rotor shaft discharges the common mode charge.

公开(公告)号：US10587162B2

公开(公告)日：2020-03-10

申请号：US15827506

申请日：2017-11-30

Applicant: Tesla, Inc.

Inventor： Bozhi Yang ,  Tomas Vianna Martins ,  Scott Michael Graves ,  Ethan Swint ,  Eric Bellemare ,  Lev Fedoseyev ,  Benjamin Dellal ,  Leif E. Olsen ,  Alexander Hain

IPC: H02K9/19 ,  H02K1/32 ,  H02K5/173 ,  H02K7/08 ,  H02K11/40 ,  H02K9/193 ,  H02K9/197 ,  H02K1/16 ,  H02K1/27 ,  H02K3/12 ,  H02K5/16 ,  H02K11/00

Abstract: An electric motor includes a case, a stator that includes end-windings, a rotor coupled to the case via at least one rotor bearing, at least one drive motor fluid pump, and drive motor electronics. The rotor includes a hollow cylindrical body, a first shaft portion, and a second shaft portion, a fluid feed tube having a fluid receive end and a fluid feed end, the fluid feed end extending into the hollow cylindrical body, and a plurality of fluid exit ports. The drive motor electronics power the stator with or without causing rotation of the rotor. The drive motor fluid pump pumps fluid into the hollow cylindrical body via the fluid feed tube, pumps the fluid out of the plurality of fluid ports, and onto the stator end-windings to collect heat from the rotor and the stator. The heated fluid may be used for heating a battery.

公开(公告)号：US20180083515A1

公开(公告)日：2018-03-22

申请号：US15827363

申请日：2017-11-30

Applicant: Tesla, Inc.

Inventor： Scott Michael Graves ,  Diego Alberto Silva Rodriguez ,  Tyler Nils Grendahl ,  Alexander Hain

IPC: H02K11/40 ,  H02K1/32 ,  H02K5/173 ,  H02K7/08

CPC classification number: H02K1/32 ,  H02K1/16 ,  H02K1/274 ,  H02K3/12 ,  H02K5/16 ,  H02K5/1732 ,  H02K7/083 ,  H02K9/193 ,  H02K9/197 ,  H02K11/00 ,  H02K11/40

Abstract: An electric motor includes a case, a stator having stator windings, a rotor having a rotor shaft, and at least one main rotor bearing coupling the rotor shaft to the case. Common mode charge builds up on the rotor due to imbalances of the stator. The at least one main rotor bearing has a first electrical resistance between the rotor shaft and the case. The electric motor further includes a rotor discharge bearing coupling the rotor shaft to the case. The rotor discharge bearing has a second electrical resistance between the rotor shaft and the case that is less than the first electrical resistance, causing the common mode charge to discharge through the rotor discharge bearing. In a differing embodiment, a rotor discharge brush coupled between the case and the rotor shaft along the longitudinal axis of the rotor shaft discharges the common mode charge.

公开(公告)号：US20220003306A1

公开(公告)日：2022-01-06

申请号：US17477402

申请日：2021-09-16

Applicant: Tesla, Inc.

Inventor： Scott Michael Graves ,  Eric Bellemare ,  Alexander Hain

IPC: F16H57/04 ,  H02K7/116 ,  B60K1/00 ,  B60K17/04 ,  H02K5/20 ,  F16C25/08 ,  H02K7/00 ,  H02K7/04 ,  H02K7/08 ,  H02K15/16 ,  H02K1/20 ,  H02K9/193

Abstract: Systems and methods for cooling power transmission systems are include providing oil through an aperture defined in a housing to a stator cooling ring, through the stator cooling ring and into stator cooling channels, through the stator cooling channels and into spaces defined between the housing and jet rings, and through holes in the jet rings and onto the end-windings. The stator cooling ring, stator cooling channels and jet rings can encircle the stator and end-windings and, via the holes in the jet rings, spray pressurized jets of oil from various angles onto the end-windings, and in particular middle regions thereof. Seals may be used between the jet rings and housing, and between the jet rings and stator ends. The seals may be compressed so as to form an interference fit between the jet rings and housing or stator ends as the case may be.

公开(公告)号：US11218045B2

公开(公告)日：2022-01-04

申请号：US16813416

申请日：2020-03-09

Applicant: Tesla, Inc.

Inventor： Bozhi Yang ,  Tomas Vianna Martins ,  Scott Michael Graves ,  Ethan Swint ,  Eric Bellemare ,  Lev Fedoseyev ,  Benjamin Dellal ,  Leif E. Olsen ,  Alexander Hain

IPC: H02K9/19 ,  H02K1/32 ,  H02K5/173 ,  H02K7/08 ,  H02K11/40 ,  H02K9/193 ,  H02K9/197 ,  H02K1/16 ,  H02K1/27 ,  H02K3/12 ,  H02K5/16 ,  H02K11/00

Abstract: An electric motor includes a case, a stator that includes end-windings, a rotor coupled to the case via at least one rotor bearing, at least one drive motor fluid pump, and drive motor electronics. The rotor includes a hollow cylindrical body, a first shaft portion, and a second shaft portion, a fluid feed tube having a fluid receive end and a fluid feed end, the fluid feed end extending into the hollow cylindrical body, and a plurality of fluid exit ports. The drive motor electronics power the stator with or without causing rotation of the rotor. The drive motor fluid pump pumps fluid into the hollow cylindrical body via the fluid feed tube, pumps the fluid out of the plurality of fluid ports, and onto the stator end-windings to collect heat from the rotor and the stator. The heated fluid may be used for heating a battery.

公开(公告)号：US20180083509A1

公开(公告)日：2018-03-22

申请号：US15827506

申请日：2017-11-30

Applicant: Tesla, Inc.

Inventor： Bozhi Yang ,  Tomas Vianna Martins ,  Scott Michael Graves ,  Ethan Swint ,  Eric Bellemare ,  Lev Fedoseyev ,  Benjamin Dellal ,  Leif E. Olsen ,  Alexander Hain

IPC: H02K9/193 ,  H02K9/197 ,  H02K1/32 ,  H02K5/173 ,  H02K7/08

CPC classification number: H02K1/32 ,  H02K1/16 ,  H02K1/274 ,  H02K3/12 ,  H02K5/16 ,  H02K5/1732 ,  H02K7/083 ,  H02K9/193 ,  H02K9/197 ,  H02K11/00 ,  H02K11/40

Abstract: An electric motor includes a case, a stator that includes end-windings, a rotor coupled to the case via at least one rotor bearing, at least one drive motor fluid pump, and drive motor electronics. The rotor includes a hollow cylindrical body, a first shaft portion, and a second shaft portion, a fluid feed tube having a fluid receive end and a fluid feed end, the fluid feed end extending into the hollow cylindrical body, and a plurality of fluid exit ports. The drive motor electronics power the stator with or without causing rotation of the rotor. The drive motor fluid pump pumps fluid into the hollow cylindrical body via the fluid feed tube, pumps the fluid out of the plurality of fluid ports, and onto the stator end-windings to collect heat from the rotor and the stator. The heated fluid may be used for heating a battery.

公开(公告)号：US11125315B2

公开(公告)日：2021-09-21

申请号：US15944990

申请日：2018-04-04

Applicant: Tesla, Inc.

Inventor： Scott Michael Graves ,  Eric Bellemare ,  Alexander Hain

IPC: H02K1/20 ,  H02K5/20 ,  H02K9/193 ,  H02K7/00 ,  F16H57/04 ,  H02K7/116 ,  B60K1/00 ,  B60K17/04 ,  F16C25/08 ,  H02K7/04 ,  H02K7/08 ,  H02K15/16 ,  F16H57/032 ,  F16H57/02 ,  F16H57/037 ,  H02K9/19 ,  B60K1/02

Abstract: Systems and methods for cooling power transmission systems are include providing oil through an aperture defined in a housing to a stator cooling ring, through the stator cooling ring and into stator cooling channels, through the stator cooling channels and into spaces defined between the housing and jet rings, and through holes in the jet rings and onto the end-windings. The stator cooling ring, stator cooling channels and jet rings can encircle the stator and end-windings and, via the holes in the jet rings, spray pressurized jets of oil from various angles onto the end-windings, and in particular middle regions thereof. Seals may be used between the jet rings and housing, and between the jet rings and stator ends. The seals may be compressed so as to form an interference fit between the jet rings and housing or stator ends as the case may be.

公开(公告)号：US20200350796A1

公开(公告)日：2020-11-05

申请号：US16813416

申请日：2020-03-09

Applicant: Tesla, Inc.

Inventor： Bozhi Yang ,  Tomas Vianna Martins ,  Scott Michael Graves ,  Ethan Swint ,  Eric Bellemare ,  Lev Fedoseyev ,  Benjamin Dellal ,  Leif E. Olsen ,  Alexander Hain

IPC: H02K1/32 ,  H02K5/173 ,  H02K7/08 ,  H02K11/40 ,  H02K9/193 ,  H02K9/197 ,  H02K1/16 ,  H02K1/27 ,  H02K3/12 ,  H02K5/16

Abstract: An electric motor includes a case, a stator that includes end-windings, a rotor coupled to the case via at least one rotor bearing, at least one drive motor fluid pump, and drive motor electronics. The rotor includes a hollow cylindrical body, a first shaft portion, and a second shaft portion, a fluid feed tube having a fluid receive end and a fluid feed end, the fluid feed end extending into the hollow cylindrical body, and a plurality of fluid exit ports. The drive motor electronics power the stator with or without causing rotation of the rotor. The drive motor fluid pump pumps fluid into the hollow cylindrical body via the fluid feed tube, pumps the fluid out of the plurality of fluid ports, and onto the stator end-windings to collect heat from the rotor and the stator. The heated fluid may be used for heating a battery.