公开(公告)号：US20180358851A1

公开(公告)日：2018-12-13

申请号：US15620003

申请日：2017-06-12

Applicant: BorgWarner Inc.

Inventor： Seong Taek Lee

IPC: H02K1/26 ,  H02K1/27 ,  H02K1/02

CPC classification number: H02K1/265 ,  H02K1/02 ,  H02K1/27 ,  H02K1/2766 ,  H02K2201/03 ,  H02K2213/03

Abstract: An electric machine including a stator and rotor. The rotor has a core wherein each pole includes first and second axially extending magnet slots positioned in an outwardly opening V-shape. Permanent magnets are positioned in the magnet slots. The magnet slots define first and second opposing major edges wherein the first major edge is disposed nearer the outer radial perimeter of the rotor core. First and second opposing minor edges extend between the major edges and the first minor edge is disposed nearer the outer radial perimeter. The first and second slots are reflectively symmetrical with one symmetrical aberration. The symmetrical aberration being formed by an axially extending non-symmetric gap defined by the first major edge of the second magnet slot proximate the first minor edge. Demagnetization may be reduced by operating the machine with the second magnet slot trailing the first magnet slot during rotation of the rotor.

公开(公告)号：US20180269762A1

公开(公告)日：2018-09-20

申请号：US15918360

申请日：2018-03-12

Applicant: MINEBEA MITSUMI Inc.

Inventor： Hiroshi ABE ,  Takashi NAKAGAWA

IPC: H02K24/00 ,  H02K1/24 ,  H02K11/21

CPC classification number: H02K24/00 ,  G01D1/00 ,  G01D5/2046 ,  G01D5/24442 ,  H02K1/246 ,  H02K1/28 ,  H02K11/21 ,  H02K2201/03

Abstract: A rotor in one embodiment includes an annular rotor main unit and a fitting portion that extends inward or outward one of an inner circumference and an outer circumference of the rotor main unit to be connected with a rotary shaft. The fitting portion is formed at a position at which a centerline of the fitting portion is offset in parallel with respect to a normal line that is associated with a tangent line of the one of the inner circumference and the outer circumference.

公开(公告)号：US10056808B2

公开(公告)日：2018-08-21

申请号：US15356629

申请日：2016-11-20

Applicant: Michael Pozmantir ,  Sergey Pozmantir

Inventor： Michael Pozmantir ,  Sergey Pozmantir

IPC: H02K11/215 ,  H02K1/02 ,  H02K1/14 ,  H02K1/27 ,  H02K3/28 ,  H02K7/14 ,  H02K11/33 ,  F04D19/00 ,  F04D25/06 ,  F04D25/08 ,  H02K21/16 ,  H02K21/22 ,  H02P1/00

CPC classification number: H02K11/215 ,  F04D19/002 ,  F04D25/0646 ,  F04D25/068 ,  F04D25/08 ,  H02K1/02 ,  H02K1/146 ,  H02K1/2706 ,  H02K1/2786 ,  H02K3/28 ,  H02K7/14 ,  H02K11/33 ,  H02K21/16 ,  H02K21/222 ,  H02K2201/03 ,  H02P1/00

Abstract: A brushless DC motor utilizing a single pole double throw reed switch as a rotor position sensor. In one embodiment, the motor has a four-pole internal stator with bifilar windings providing alternating polarization for each subsequent pole, and a hollow outer rotor with radially magnetized ring-shaped permanent magnet. The rotor magnet has magnetically uninterrupted four-pole torque generating surface and incorporates features to interact with the reed switch. A non-uniform air gap between the stator poles and an inner surface of the rotor magnet allows generating a complementary reluctance torque between the energization pulses. The motor includes means to limit the electric current through the reed switch.

公开(公告)号：US20180191213A1

公开(公告)日：2018-07-05

申请号：US15740988

申请日：2016-06-08

Applicant: Robert Bosch GmbH

Inventor： Dirk BUEHLER ,  Milorad RISTICEVIC ,  Steven Andrew EVANS

IPC: H02K1/27 ,  H02K1/16

CPC classification number: H02K1/2786 ,  H02K1/16 ,  H02K21/22 ,  H02K29/03 ,  H02K2201/03 ,  H02K2213/03

Abstract: The invention describes an electrical machine comprising a stator and a rotor which is separated from the stator by an air gap and has a plurality of shell-like magnet segments which are fastened to a magnetic return path element. In this case, the magnet segments are arranged opposite one another in pairs in each case and each have a plurality of magnetically differently polarized sections in the circumferential direction, said sections each forming a magnetic pole of the rotor. In this case, recesses which each serve as outer detached pole portions are provided on that side which faces the stator in the edge zones of the magnet segments which are arranged in the circumferential direction. Furthermore, further recesses are provided on that side which faces the stator in the transition zones between the magnetically differently polarized sections of the magnet segments, said recesses serving as inner detached pole portions.

公开(公告)号：US20180183287A1

公开(公告)日：2018-06-28

申请号：US15735763

申请日：2016-06-08

Applicant: AXCO-Motors Oy

Inventor： Asko PARVIAINEN

IPC: H02K1/27 ,  H02K15/03 ,  H02K1/32 ,  H02K9/02

CPC classification number: H02K1/2766 ,  H02K1/32 ,  H02K9/02 ,  H02K15/03 ,  H02K21/028 ,  H02K21/042 ,  H02K2201/03 ,  H02K2213/09

Abstract: The invention relates to a method and to an arrangement for adjusting the magnetization of a permanent magnet machine, i.e. the magnetic flux induced by permanent magnets of a rotor in a stator, i.e. the air gap flux. According to the invention, the air gap flux is adjusted by adjusting the leakage flux of the permanent magnet.

公开(公告)号：US20180159385A1

公开(公告)日：2018-06-07

申请号：US15805356

申请日：2017-11-07

Applicant: Sunonwealth Electric Machine Industry Co., Ltd.

Inventor： Alex Horng ,  Chi-Min Wang ,  Ku-Ling Liu

IPC: H02K1/14 ,  H02K1/02

CPC classification number: H02K1/146 ,  H02K1/02 ,  H02K1/2773 ,  H02K2201/03 ,  H02K2213/03

Abstract: A silicon steel plate used to form a stator of a motor is disclosed. The silicon steel plate includes a plurality of magnetic pole units. Each of the plurality of magnetic pole units includes a magnetic yoke portion, a pole portion and a boost portion. The magnetic yoke portions of the plurality of magnetic pole units are connected as a magnetic yoke ring. The boost portion includes an inner face, and the inner faces of the boost portions of the plurality of magnetic pole units form a receiving hole. The receiving hole has a maximal diameter, the silicon steel plate has a maximal diameter, and a ratio of the maximal diameter of the receiving hole to the maximal diameter of the silicon steel plate is 0.54-0.84.

公开(公告)号：US20180115200A1

公开(公告)日：2018-04-26

申请号：US15703334

申请日：2017-09-13

Applicant: AISIN SEIKI KABUSHIKI KAISHA

Inventor： Akihiro YASUI ,  Nobuyasu MIWA ,  Takemitsu SUMIYA ,  Eisuke UMEMURA

IPC: H02K1/14 ,  H02K1/27 ,  H02K3/12 ,  H02K3/28 ,  H02K21/16

CPC classification number: H02K1/146 ,  H02K1/2753 ,  H02K3/12 ,  H02K3/28 ,  H02K3/325 ,  H02K21/16 ,  H02K2201/03 ,  H02K2213/03

Abstract: A brushless motor includes: a magnet rotor rotatable integrally with a rotary shaft; and a stator disposed to face the magnet rotor with a gap therebetween in a diameter direction of the magnet rotor, The stator includes first teeth each having a first counter surface facing the magnet rotor with a first air gap therebetween, second teeth provided between the first teeth adjacent to each other in a circumferential direction of the stator and each having a second counter surface facing the magnet rotor through a second air gap, and drive coils formed by concentrically winding a conductive wire around only the first teeth. A length of the second counter surface is shorter than that of the first counter surface, each of the first and second counter surfaces is a curved surface, the first and second air gaps become larger from the center thereof toward an edge thereof, respectively

公开(公告)号：US09934924B2

公开(公告)日：2018-04-03

申请号：US14912925

申请日：2014-08-12

Applicant: Chih-Chuan Liang

Inventor： Chih-Chuan Liang

IPC: H01H51/22 ,  H01H50/22 ,  H01H50/64 ,  H01H50/44 ,  H02K26/00 ,  H02K1/14 ,  H02K7/06 ,  H01F7/122 ,  H01F7/14

CPC classification number: H01H50/22 ,  H01F7/122 ,  H01F7/14 ,  H01H50/44 ,  H01H50/643 ,  H01H50/645 ,  H01H51/2263 ,  H01H2205/002 ,  H02K1/143 ,  H02K7/06 ,  H02K26/00 ,  H02K2201/03

Abstract: A bistable relay and a bistable actuator are provided. The bistable actuator includes a magnetic latching mechanism and an electromagnet. The magnetic latching mechanism includes a rotation shaft, a pillar-shaped permanent magnet, a columnar hollow magnetic conductor and two shells, and operates between a first and second stable states. The columnar hollow magnetic conductor surrounds the pillar-shaped permanent magnet wrapping the rotation shaft, and maintains a gap with the pillar-shaped permanent magnet. The electromagnet is connected to the columnar hollow magnetic conductor for driving the pillar-shaped permanent magnet to rotate, so as to switch the magnetic latching mechanism to the stable state. During a process that the magnetic latching mechanism is switched to the stable state, the rotation shaft rotates synchronously along with the magnetic latching mechanism to drive an impact system to move relative to a contact system, so as to contact or disconnect the contact points.

公开(公告)号：US09923423B2

公开(公告)日：2018-03-20

申请号：US14969677

申请日：2015-12-15

Applicant: Regal Beloit America, Inc.

Inventor： Subhash Marutirao Brahmavar ,  Lester Benjamin Manz ,  Ludovic Andre Chretien ,  Changiz Rashidzadeh ,  Dan Mircea Ionel

IPC: H02K1/27 ,  H02K15/03 ,  H02K21/16 ,  H02K3/02

CPC classification number: H02K1/2773 ,  H02K3/02 ,  H02K15/03 ,  H02K21/16 ,  H02K2201/03 ,  H02K2213/03 ,  Y10T29/49012

Abstract: In one embodiment, a permanent magnet rotor is provided. The permanent magnet rotor includes at least one permanent magnet and a substantially cylindrical rotor core including an outer edge and an inner edge defining a central opening. The rotor core includes a radius R, at least one pole, and at least one radial aperture extending radially though the rotor core from the outer edge to a predetermined depth less than the radius. The at least one radial aperture is configured to receive the at least one permanent magnet. The rotor further includes at least one protrusion extending into the at least one radial aperture, the at least one protrusion positioned substantially along a bottom of the at least one radial aperture and configured to facilitate retention of the at least one permanent magnet within the at least one radial aperture.

公开(公告)号：US20180054098A1

公开(公告)日：2018-02-22

申请号：US15557336

申请日：2016-03-08

Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

Inventor： Naotaka TOIDA ,  Taizo KUSADOME ,  Motoki SHIMOGAWA

IPC: H02K1/24 ,  H02K1/27

CPC classification number: H02K1/246 ,  H02K1/27 ,  H02K1/276 ,  H02K21/14 ,  H02K29/03 ,  H02K2201/03 ,  H02K2213/03

Abstract: A rotor for a rotating electrical machine includes a cylindrical rotor core configured to be arranged radially inside of a stator with a coil wound therearound. An outer circumferential surface of the rotor core is opposed to the stator with a gap therebetween. The rotor core has a plurality of magnetic pole regions in a circumferential direction and also has, in each of the magnetic pole regions, a flux barrier extending along q-axis magnetic paths. An inner wall of the flux barrier has a radially outer wall surface and a radially inner wall surface. The radially inner wall surface is broadened to be closer to the adjacent magnetic pole region than a position along the q-axis magnetic paths.