公开(公告)号：US12097776B2

公开(公告)日：2024-09-24

申请号：US17963629

申请日：2022-10-11

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Ji Wu ,  Yang Xu ,  Michael W. Degner ,  Wei Wu

IPC: B60L53/24 ,  B60L53/53

CPC classification number: B60L53/24 ,  B60L53/53

Abstract: An electric drive system is actively controlled while an electrified vehicle is being towed. The inverter switches are manipulated to preclude exceeding a maximum voltage of a DC bus and also to preclude exceeding a maximum phase current magnitude. During a transition from an inverter off state to a short-circuit state, field-oriented control is utilized.

公开(公告)号：US11018567B2

公开(公告)日：2021-05-25

申请号：US15720754

申请日：2017-09-29

Applicant: Ford Global Technologies, LLC

Inventor： Feng Liang ,  Lusu Guo ,  Michael W. Degner ,  Wei Wu ,  Chun Tang

IPC: H02K23/04 ,  H02K1/17 ,  H02K23/42 ,  H02K1/12 ,  H02K1/27

Abstract: A permanent magnet machine includes a rotor and an irregular polyhedron shaped magnet assembly. The rotor may define at least one magnet opening and may be configured to rotate within a circular opening defined by a stator. The irregular polyhedron shaped magnet assembly may be disposed in the magnet opening and may define a magnetization direction, wherein a height along the magnetization direction and perpendicular with a lamination plane of the rotor is greater at both ends than at a central portion disposed therebetween.

公开(公告)号：US09035522B2

公开(公告)日：2015-05-19

申请号：US14010208

申请日：2013-08-26

Applicant: Ford Global Technologies, LLC

Inventor： Feng Liang ,  Wei Wu ,  Michael W. Degner ,  Franco Leonardi

IPC: H02K21/12 ,  H02K1/27 ,  H02K29/03 ,  B60L11/12 ,  B60L11/14

CPC classification number: H02K1/276 ,  B60L11/123 ,  B60L11/14 ,  H02K1/27 ,  H02K1/2766 ,  H02K1/2773 ,  H02K29/03 ,  H02K2201/06 ,  Y02T10/6217 ,  Y02T10/641 ,  Y02T10/7077

Abstract: An internal permanent magnet machine has multiple rotor sections, each section having multiple rotor laminations. Permanent magnets are placed asymmetrically in lamination openings to attenuate oscillations in torque caused by harmonic components of magnetic flux. Asymmetry is achieved by placing adjacent permanent magnets or magnet sets on the rotor periphery with different rotor magnetic pole arc angles.

Abstract translation: 内部永磁机具有多个转子部分，每个部分具有多个转子叠片。 永磁体在层叠开口中不对称地放置，以衰减由磁通量的谐波分量引起的扭矩振荡。 通过将不同的转子磁极角度放置在转子周边上的相邻永磁体或磁体组件来实现不对称。

公开(公告)号：US20240116377A1

公开(公告)日：2024-04-11

申请号：US17963629

申请日：2022-10-11

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Ji Wu ,  Yang Xu ,  Michael W. Degner ,  Wei Wu

IPC: B60L53/24 ,  B60L53/53

CPC classification number: B60L53/24 ,  B60L53/53

Abstract: An electric drive system is actively controlled while an electrified vehicle is being towed. The inverter switches are manipulated to preclude exceeding a maximum voltage of a DC bus and also to preclude exceeding a maximum phase current magnitude. During a transition from an inverter off state to a short-circuit state, field-oriented control is utilized.

公开(公告)号：US11705849B2

公开(公告)日：2023-07-18

申请号：US17491703

申请日：2021-10-01

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Ji Wu ,  Wei Wu

IPC: H02P27/08 ,  H02M7/5387 ,  B60L50/60 ,  B60K6/28 ,  B60K6/26

CPC classification number: H02P27/08 ,  H02M7/53871 ,  B60K6/26 ,  B60K6/28 ,  B60L50/60 ,  B60Y2200/91 ,  B60Y2200/92 ,  B60Y2400/61 ,  H02P2207/05

Abstract: A vehicle includes a battery, an inverter, a permanent magnet electric machine, and a controller. The controller commands discharge of a storage element of the inverter through the permanent magnet electric machine via a current having a zero quadrature axis component and a positive direct axis component.

公开(公告)号：US20240266933A1

公开(公告)日：2024-08-08

申请号：US18163385

申请日：2023-02-02

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Wei Wu ,  Dexiang Dallis Sun ,  Devan James Anderson

IPC: H02K21/14 ,  H02K7/00 ,  H02K15/03

CPC classification number: H02K21/14 ,  H02K7/003 ,  H02K15/03

Abstract: A permanent magnet synchronous motor includes a shaft with an integrally formed flange and resolver rotor. The resolver rotor is formed by machining a set of cutouts in the flange. The rotor body, which includes the permanent magnets, is assembled onto the shaft from the end of the shaft opposite the flange and resolver rotor. Features, such as keyways on the shaft and keys on the rotor body establish a rotational position relationship between the shaft and the permanent magnets.

公开(公告)号：US20230421027A1

公开(公告)日：2023-12-28

申请号：US17851963

申请日：2022-06-28

Applicant: Ford Global Technologies, LLC

Inventor： Ji Wu ,  Michael W. Degner ,  Wei Wu

IPC: H02K11/38

CPC classification number: H02K11/38 ,  H02K2213/03

Abstract: A controller, responsive to a signal indicating deactivation of a vehicle and disconnection of a traction battery from an inverter, generates a d-axis current command for the inverter having a ramp portion that defines a rate of change in current magnitude that depends on an electric angle between a rotor and stator of an electric machine.

公开(公告)号：US11539255B2

公开(公告)日：2022-12-27

申请号：US16828192

申请日：2020-03-24

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Adeeb Ahmed ,  Wei Wu

IPC: H02K3/14 ,  H02K3/28 ,  H02K3/48

Abstract: An electric machine includes a stator core defining slots and a single-layer winding disposed in the core and having first and second parallel paths. Each path includes hairpins interconnected to form a continuous circuit between a terminal and a neutral. The hairpins of the first path include a first type of hairpins each having a first leg, a second leg, a crown connecting between the legs, an outwardly extending twist joined to the first leg, and an inwardly extending twist joined to the second leg, wherein the legs are spaced apart by a span of five slots, and a second type of hairpins each having a first leg, a second leg, a crown connecting between the legs, an inwardly extending twist joined to the first leg, and an outwardly extending twist joined to the second leg, wherein the legs are spaced apart by a span of seven slots.

公开(公告)号：US10958120B2

公开(公告)日：2021-03-23

申请号：US15710073

申请日：2017-09-20

Applicant: Ford Global Technologies, LLC

Inventor： Chun Tang ,  Feng Liang ,  Wei Wu ,  Michael W. Degner

IPC: H02K1/27 ,  H02K29/03

Abstract: A permanent magnet machine is provided. The permanent magnet machine may include a plurality of laminations stacked to form a rotor. Each of the laminations may define a d-axis, and first and second, recessed notches on an outer circumference. The first and second recessed notches may be disposed at ±180/N electrical degrees with respect to the d-axis. N may be a multiple of 6.

公开(公告)号：US10797544B2

公开(公告)日：2020-10-06

申请号：US15380022

申请日：2016-12-15

Applicant: Ford Global Technologies, LLC

Inventor： Chun Tang ,  Wei Wu ,  Feng Liang ,  Michael W. Degner

IPC: H02K1/27 ,  H02K21/14

Abstract: An electric machine may include a rotor defining a cavity containing a magnet, an outer periphery and a top bridge therebetween. The top bridge defines at least two segments. Each of the segments has a width that is minimum closest to a Q-axis, is maximum closest to a D-axis, and monotonically increases from the minimum to the maximum such that during operation a rate of change of rotor magnetomotive force associated with each segment differs.