公开(公告)号：US10052730B2

公开(公告)日：2018-08-21

申请号：US15563328

申请日：2016-03-31

Applicant: Peng Cheng ,  Bengt Oelmann ,  Stefan Haller

Inventor： Peng Cheng ,  Bengt Oelmann ,  Stefan Haller

IPC: H02K23/04 ,  B23Q5/16 ,  H02K29/06 ,  H02K29/14 ,  H02P7/28 ,  H02K21/28 ,  H02K29/03

CPC classification number: B23Q5/16 ,  H02K21/28 ,  H02K29/00 ,  H02K29/03 ,  H02K29/06 ,  H02K29/14 ,  H02P7/28

Abstract: A variable-speed direct current motor comprising a stator (22), a rotor (23) arranged within the stator, and a motor drive device (40) arranged partly at the stator and partly at the rotor, wherein the stator comprises a yoke (25) defining a cylindrical cavity (31), and a plurality of permanent magnets (24) arranged at the yoke, wherein the rotor comprises a cylindrical core (26) and a conductor structure (47) arranged at the core, wherein the motor drive device comprises an alternating current transformer (41) having a primary winding (42) arranged at the stator and a secondary winding (43) arranged at the rotor, a rectifier device (44) arranged at the rotor and connected with the secondary winding, a direct current supply device (45) arranged at the rotor (23) and connected with the rectifier device (44), and with the conductor structure (47), and an operation control device (48) comprising a first unit (49) arranged at the rotor (23) and a second unit (50) arranged externally of the rotor and wirelessly communicating with the first unit.

公开(公告)号：US20180233974A1

公开(公告)日：2018-08-16

申请号：US15513734

申请日：2015-09-16

Applicant: TM4 INC.

Inventor： Ruisheng Shi ,  Arbi Gharakhani

IPC: H02K1/27 ,  B60L11/00 ,  H02K29/03 ,  H02K1/24 ,  H02K21/22 ,  H02K15/03 ,  H02K1/28

CPC classification number: H02K1/2786 ,  B60L50/00 ,  B60L50/90 ,  H02K1/246 ,  H02K1/28 ,  H02K15/03 ,  H02K21/22 ,  H02K29/03 ,  H02K2213/03 ,  Y02T10/641

Abstract: A reluctance assisted external rotor permanent magnet machine provided with fewer magnets without scarifying performance is described herein. Torque ripple and cogging torque reductions are discussed.

公开(公告)号：US20180205274A1

公开(公告)日：2018-07-19

申请号：US15745860

申请日：2016-12-16

Applicant: Hanon Systems

Inventor： Jeong Gil Heo ,  Chan Ho Baek ,  Bong Kyun Seo

IPC: H02K1/27 ,  H02K1/32 ,  H02K1/16

CPC classification number: H02K1/276 ,  H02K1/16 ,  H02K1/24 ,  H02K1/27 ,  H02K1/2766 ,  H02K1/32 ,  H02K21/14 ,  H02K29/03 ,  H02K2213/03

Abstract: A rotor is for a permanent magnet embedded-type motor and a motor using the same. A rotor for a permanent magnet embedded-type motor includes a rotor core having a rotary shaft fixed to a center and having a plurality of magnet insertion holes formed to be spaced along a circumferential direction and a plurality of pairs of permanent magnets, respectively, inserted into each of the plurality of magnet insertion holes in a V-shape to be gradually spaced apart from each other toward a radially outer side. Each of the plurality of magnet insertion holes includes a pair of inner sides facing each other, and a barrier hole is formed to expand an inner space of each of the magnet insertion holes to protrude from the pair of inner sides, respectively.

公开(公告)号：US20180198330A1

公开(公告)日：2018-07-12

申请号：US15575422

申请日：2015-09-30

Applicant: Mitsubishi Electric Corporation

Inventor： Yuji TAKIZAWA ,  Satoru AKUTSU ,  Masafumi OKAZAKI ,  Hiroshi AIDA ,  Yu HIROTANI ,  Kazumasa ITO

IPC: H02K1/27 ,  H02K21/14 ,  H02K29/03 ,  H02K1/16

CPC classification number: H02K1/274 ,  H02K1/16 ,  H02K1/27 ,  H02K21/14 ,  H02K29/03 ,  H02K2201/06

Abstract: It has been discovered that torque ripples can be reduced by adopting a shape in which: the width of a shoe connection formed in a stator of a permanent magnet motor is equal to or smaller than the thickness of each of core pieces constituting a stator core; and a relationship of 0.7≤Wm/(Tm×Gm)≤3.3 is satisfied, where Wm is the length of the long side of a flat plate-shaped permanent magnet embedded in a rotor, Tm is the length of the short side of the permanent magnet, and Gm is the maximum distance from the outer circumference of the rotor to the permanent magnet.

公开(公告)号：US09991772B2

公开(公告)日：2018-06-05

申请号：US15149101

申请日：2016-05-07

Applicant: Philip Totaro

Inventor： Philip Totaro ,  Fang Deng ,  Daniel M. Saban ,  Seong T. Lee ,  Murtuza Lokhandwalla ,  Joel Hetrick ,  Janne Kinnunen

IPC: H02K21/14 ,  H02K29/03 ,  H02K1/16 ,  H02K1/27 ,  H02K1/28 ,  H02K21/22 ,  H02K7/18

CPC classification number: H02K21/14 ,  H02K1/16 ,  H02K1/278 ,  H02K1/28 ,  H02K7/1838 ,  H02K21/22 ,  H02K29/03 ,  H02K2201/06 ,  H02K2213/03

Abstract: A rotor or stator hub for an electric machine includes a plurality of magnets arranged in a predetermined same pattern on a plurality of uniformly sized carrier plates. A plurality of permanent magnets are uniformly mounted on each of the carrier plates proximate a first edge of the carrier plate and spaced away from a second edge of the carrier plate. The carrier plates may be mounted on a rotor or stator hub in a predetermined configuration to create a plurality of axial array groups.

公开(公告)号：US09985507B2

公开(公告)日：2018-05-29

申请号：US14758298

申请日：2013-04-22

Applicant: Mitsubishi Electric Corporation

Inventor： Masatsugu Nakano ,  Yu Hirotani ,  Satoru Akutsu ,  Toyoaki Udo ,  Yuji Takizawa

IPC: H02K1/27 ,  H02K29/03 ,  H02K3/12 ,  H02K3/28 ,  B62D5/04 ,  H02P25/22 ,  H02P6/10 ,  H02K21/14 ,  H02K11/33

CPC classification number: H02K29/03 ,  B62D5/0424 ,  H02K1/2773 ,  H02K1/278 ,  H02K3/12 ,  H02K3/28 ,  H02K11/33 ,  H02K21/14 ,  H02K2201/06 ,  H02K2213/03 ,  H02P6/10 ,  H02P25/22

Abstract: To provide a permanent magnet type motor having reduced torque ripple, in which torque ripples for electric angle sixth order and twelfth order are both reduced with a small skew angle.Driving is performed such that phases of currents flowing in two sets of three-phase armature windings 26-1 and 26-2 are different from each other by 20 degrees to 40 degrees in electric angle. A rotor 11 is composed of m stages of rotor component units arranged in the axial direction. The m stages of rotor component units are skewed to have a stage-skew structure such that a skew angle θ (unit: degree) between the adjacent units satisfies 26/m≤θ≤43.2/m (m is an integer equal to or greater than 2) in electric angle.

公开(公告)号：US09966804B2

公开(公告)日：2018-05-08

申请号：US14722723

申请日：2015-05-27

Applicant: Industrial Technology Research Institute

Inventor： Shou-Long Yu ,  Yang-Guang Liu ,  Chia-Hao Hsu ,  Liang-Chiao Huang ,  Yu-Choung Chang

IPC: H02K1/06 ,  H02K1/14 ,  H02K29/03

CPC classification number: H02K1/146 ,  H02K29/03 ,  H02K2213/03

Abstract: An outer-rotor permanent magnet brushless motor is disclosed, which comprises an outer-rotor and an inner-stator. The outer-rotor configured with P poles, P is a natural number and denotes a multiple of 4. The inner-stator has a stator axle, and S teeth which configured on outer surface of stator, S=P−1, S is a natural number. A circle is formed about a center of the stator axle from the center of the outer end surface. A correction angle a1 and an original angle a are defined from the center of the outer end surface. T The ratio of a1/a is defined by the following formula: 0.2

公开(公告)号：US20180115202A1

公开(公告)日：2018-04-26

申请号：US15562980

申请日：2015-04-22

Applicant: Mitsubishi Electric Corporation

Inventor： Yu HIROTANI ,  Kazumasa ITO ,  Yuji TAKIZAWA ,  Satoru AKUTSU ,  Hiroshi AIDA ,  Shusuke HORI

IPC: H02K1/16 ,  H02K1/18 ,  H02K3/48 ,  H02K3/32 ,  H02K1/27

CPC classification number: H02K1/16 ,  B62D5/04 ,  H02K1/146 ,  H02K1/18 ,  H02K1/185 ,  H02K1/2706 ,  H02K1/2746 ,  H02K3/32 ,  H02K3/48 ,  H02K29/03 ,  H02K2201/06 ,  H02K2213/03

Abstract: In the rotary electric machine according to the present invention, a plurality of core sheets include linked core sheets that include linking portions that protrude circumferentially from flange portions so as to link together tip portions of adjacent tooth portions, at least one sheet of the linked core sheets is formed such that a tooth tip portion shape is mirror-asymmetrical relative to a tooth central axis that passes through a circumferential center of the tooth portions, and a stator core is configured by laminating the linked core sheets such that circumferential positions of the linking portions are offset.

公开(公告)号：US20180097414A1

公开(公告)日：2018-04-05

申请号：US15720963

申请日：2017-09-29

Applicant: Huangshi Dongbei Electrical Appliance Co., LTD.

Inventor： Flavio Jorge Haddad KALLUF ,  Paulo Rogério Carrara COUTO

IPC: H02K1/30 ,  H02K1/27 ,  H02K5/04

CPC classification number: H02K1/30 ,  H02K1/2706 ,  H02K1/278 ,  H02K1/28 ,  H02K5/04 ,  H02K29/03

Abstract: The present invention relates to a rotor (2) for brushless type motor with surface magnets (1), having radial stoppers (7) for limiting the angular displacement of the magnets during the assembly of the rotor, and having further axial stoppers (12) to limit the axial displacement of the magnets (1) during the assembly. The stoppers (7, 12) ensure the correct positioning of the magnets without the need for addition of other components, and also guarantee good performance, further avoiding problems related to noise or vibration.

公开(公告)号：US20180062462A1

公开(公告)日：2018-03-01

申请号：US15557587

申请日：2015-06-15

Applicant: Mitsubishi Electric Corporation

Inventor： Atsushi ISHIKAWA ,  Masahiro NIGO

IPC: H02K1/27 ,  H02K29/03 ,  H02K1/02 ,  F25B31/02

CPC classification number: H02K1/276 ,  F25B31/02 ,  H02K1/02 ,  H02K1/148 ,  H02K21/14 ,  H02K29/03 ,  H02K2201/06 ,  H02K2213/03

Abstract: A rotor of a permanent-magnet-embedded electric motor includes an annular rotor core having a plurality of magnet insertion holes formed in a circumferential direction, and permanent magnets inserted into the magnet insertion holes, respectively. The rotor core is formed by alternately stacking a first core block and a second core block in an axial direction of the rotor core, the first core block not having slits between each of the magnet insertion holes and a circumferential surface of the rotor core, and the second core block having the slits between each of the magnet insertion holes and the circumferential surface of the rotor core. One of the slits and one end of the permanent magnet are arrayed in a radial direction, and the other slit and the other end of the permanent magnet are arrayed in the radial direction.