Erik A Johnson

US Patent:

20220416636, Dec 29, 2022

Filed:

Aug 24, 2022

Appl. No.:

17/894791

Inventors:

- Los Angeles CA, US
Arbi GHARAKHANI SIRAKI - Los Angeles CA, US
Erik JOHNSON - Los Angeles CA, US
Shahriyar BEIZAEE - Los Angeles CA, US
Rachel OZER - Los Angeles CA, US
Ju Hyung KIM - Los Angeles CA, US

International Classification:

H02K 41/03
H02K 3/24
G01R 33/385
H02K 1/20
H02K 3/22
H02K 15/02
H02K 3/04
H02K 9/22
H02K 19/10

Abstract:

Homopolar linear synchronous machines are provided herein that include a mover device. The mover device includes a cold plate with ferromagnetic cores extending through slots in the cold plate. Layers of armature coils are located around the ferromagnetic cores on opposite sides of the cold plate. The mover device further includes at least one field coil.

US Patent:

20220384077, Dec 1, 2022

Filed:

Nov 5, 2020

Appl. No.:

17/774038

Inventors:

- Los Angeles CA, US
Noel GODINEZ - Los Angeles CA, US
Erik JOHNSON - Los Angeles CA, US
George TIRONE - Los Angeles CA, US

International Classification:

H01F 7/08
H01F 27/28
H01F 7/06

Abstract:

An electromagnetic actuator for generating force is provided. The electromagnetic actuator includes a ferromagnetic body extending along a longitudinal axis, the ferromagnetic body comprising: a back-iron portion; and a pair of pole portions, extending from the back-iron portion, the back-iron portion connecting the pair of pole portions. The electromagnetic actuator further includes one or more magnetic-flux changing components at the pole portions, a respective magnetic-flux changing component located at a respective pole face, the respective magnetic-flux changing component configured to change magnetic flux density at a respective track-facing surface relative to the respective pole face. The electromagnetic actuator further includes electrical windings around the pole portions.

US Patent:

20220385162, Dec 1, 2022

Filed:

Nov 5, 2020

Appl. No.:

17/773940

Inventors:

- Los Angeles CA, US
Arbi GHARAKHANI SIRAKI - Los Angeles CA, US
Rachel OZER - Los Angeles CA, US
Shahriyar BEIZAEE - Los Angeles CA, US
Erik JOHNSON - Los Angeles CA, US

International Classification:

H02K 49/04
H02K 11/21
H02K 11/25
H02K 41/025

Abstract:

A system (), electromagnetic actuator () and track () for braking are provided. The actuator () includes pole portions () extending from back-iron portions. Respective longitudinal axes () of the pole portions () are arranged about parallel to one another and about perpendicular to a common movement axis (). A pole pitch of the pole portions () is selected to induce eddy currents in a segmented track (), such that the eddy currents are present in a skin depth at more than one surface of segments () of the segmented track () when the pole portions () are moving at given speeds. Eddy current generated losses occupy about an entirety of a volume of a segment () of the track () below a given intermediate speed, and the eddy current generated losses occupy at least one third of the volume of the segment () at a given maximum speed greater than the given intermediate speed. Individually controllable electrical windings are around respective pole portions ().

US Patent:

20220376595, Nov 24, 2022

Filed:

Nov 5, 2020

Appl. No.:

17/773888

Inventors:

- Los Angeles CA, US
Tim LAMBERT - Los Angeles CA, US
Erik JOHNSON - Los Angeles CA, US

International Classification:

H02K 41/03
H02K 1/20
H05K 7/20
H02K 5/22

Abstract:

An electromagnetic machine for generating force is provided. The electromagnetic machine includes a magnet having opposing sides extending along a longitudinal axis. The electromagnetic machine includes a pair of ferromagnetic bodies respectively extending along the opposing sides of the magnet, and along the longitudinal axis, each of the ferromagnetic bodies comprising: a back-iron portion; and a pole portion extending from the back-iron portion. The magnet and the ferromagnetic bodies include reciprocal retention devices at the opposing sides along the longitudinal axis. The electromagnetic machine includes electrical windings around respective pole portions of the ferromagnetic bodies, the electrical windings around the respective pole portions being independently controllable. The electromagnetic machine includes at least one cold plate configured to thermally isolate the magnet from the electrical windings.

US Patent:

20230018436, Jan 19, 2023

Filed:

Sep 28, 2022

Appl. No.:

17/955027

Inventors:

- Los Angeles CA, US
Arbi Gharakhani SIRAKI - Pasadena CA, US
Erik JOHNSON - Los Angeles CA, US
Shahriyar BEIZAEE - Woodland Hills CA, US
Rachel OZER - Los Angeles CA, US
Ju Hyung KIM - Los Angeles CA, US

Assignee:

HYPERLOOP TECHNOLOGIES, INC. - Los Angeles CA

International Classification:

H02K 41/03
H02K 3/24
G01R 33/385
H02K 1/20
H02K 3/22
H02K 15/02
H02K 3/04
H02K 9/22
H02K 19/10

Abstract:

A moving member of a machine can include a cold plate that serves as a primary structural member for the moving member. The cold plate can have one or more cooling channels formed within the cold plate. A plurality of armature windings can be fixed to the cold plate. One or more field windings can be fixed to the cold plate. A plurality of ferromagnetic cores can be fixed to the cold plate, each ferromagnetic core positioned within a loop of at least one of the plurality of armature windings. Other embodiments are described.

US Patent:

20210408886, Dec 30, 2021

Filed:

Sep 8, 2021

Appl. No.:

17/469615

Inventors:

- Los Angeles CA, US
Arbi Gharakhani Siraki - Pasadena CA, US
Erik Johnson - Los Angeles CA, US
Shahriyar Beizaee - Woodland Hills CA, US
Rachel Ozer - Los Angeles CA, US
Ju Hyung Kim - Los Angeles CA, US

International Classification:

H02K 41/03
H02K 3/24
G01R 33/385
H02K 1/20
H02K 3/22
H02K 15/02

Abstract:

Disclosed is a machine having a moving member. The moving member including a cold plate having a plurality of slots through the cold plate. The moving member also including a plurality of ferromagnetic cores coupled to the cold plate, each of the plurality of ferromagnetic cores protruding through a respective one of the plurality of slots, creating gaps between the plurality of ferromagnetic cores. The moving member also including a plurality of armature windings coupled to the cold plate, the plurality of armature windings occupying the gaps between the plurality of ferromagnetic cores.

US Patent:

20210336511, Oct 28, 2021

Filed:

Sep 18, 2019

Appl. No.:

17/274886

Inventors:

- Los Angeles CA, US
Arbi GHARAKHANI SIRAKI - Los Angeles CA, US
Erik JOHNSON - Los Angeles CA, US
Shahriyar BEIZAEE - Los Angeles CA, US
Rachel OZER - Los Angeles CA, US
Ju Hyung KIM - Los Angeles CA, US

International Classification:

H02K 9/22
H02K 19/10
H02K 3/04

Abstract:

Homopolar linear synchronous machines () are provided herein that include a mover device (). The mover device () includes a cold plate with ferromagnetic cores extending through slots in the cold plate. Layers of armature coils are located around the ferromagnetic cores on opposite sides of the cold plate. The mover device () further includes at least one field coil.

US Patent:

20200088819, Mar 19, 2020

Filed:

Sep 19, 2019

Appl. No.:

16/576610

Inventors:

- Los Angeles CA, US
Arbi Gharakhani Siraki - Pasadena CA, US
Erik Johnson - Los Angeles CA, US
Shahriyar Beizaee - Woodland Hills CA, US
Rachel Ozer - Los Angeles CA, US
Ju Hyung Kim - Los Angeles CA, US

International Classification:

G01R 33/385
H02K 1/20
H02K 15/02
H02K 3/22

Abstract:

A moving member of a machine can include a cold plate that serves as a primary structural member for the moving member. The cold plate can have one or more cooling channels formed within the cold plate. A plurality of armature windings can be fixed to the cold plate. One or more field windings can be fixed to the cold plate. A plurality of ferromagnetic cores can be fixed to the cold plate, each ferromagnetic core positioned within a loop of at least one of the plurality of armature windings. Other embodiments are described.