公开(公告)号：US11764630B2

公开(公告)日：2023-09-19

申请号：US17512030

申请日：2021-10-27

Applicant: Jing-Jin Electric Technologies Co., Ltd.

Inventor： Kaihe Zhang ,  Kunxing Sun ,  Liangliang Zhang ,  Chunxia Cai ,  Xuan Zou ,  Chunshuang Feng

IPC: H02K3/28

CPC classification number: H02K3/28 ,  H02K2203/06 ,  H02K2213/03

Abstract: The present disclosure discloses a stator assembly and motor. The stator assembly comprises a stator core and a multi-branch rectangular conductor winding, an even number of stator slots are provided on an inner circumference of the stator core, and each of the stator slots is divided into multiple layers for accommodating rectangular conductors. The multi-branch rectangular conductor winding is provided in the stator slots, and the multi-branch rectangular conductor winding comprises B number of parallel branches, and B is an integer multiple of 4. The number of slots per phase per pole, Q, of the stator assembly is an odd number, and Q and B satisfy a relationship that both (Q+1)*2/B and (Q−1)*2/B are integers. In the stator assembly of the present disclosure, by way of the special winding connection design, there is no phase difference of magnetic fields between the parallel branches, and each parallel branch equally passes through each layer in the stator slots, which fundamentally inhibits the generation of circulating current between the parallel branches, suppresses the harmonics, and improves the efficiency of the motor.

公开(公告)号：US20190036432A1

公开(公告)日：2019-01-31

申请号：US15747426

申请日：2017-01-20

Applicant: Jing-Jin Electric Technologies Co., Ltd.

Inventor： Liangliang Zhang ,  Pei Zhang

IPC: H02K21/16 ,  H02K1/02 ,  H02K1/14 ,  H02K1/27

Abstract: The present disclosure discloses a permanent magnet electric motor, which is a radial flux electric motor, consisting of a stator and a rotor, wherein an inner circle of the stator is provided with N stator teeth evenly in circumferential direction, each of the stator teeth is wound by a coil, and the N coils form stator windings, wherein, the N is an integer not less than 12. Additionally, the number of magnetic poles of the rotor is not less than 12 so that widths and the centrifugal forces of the magnets under each of the magnetic poles are limited, thereby facilitating the high speed operation of the electric motor and improving the safety. The stator is manufactured by laminating a plurality of annular thin sheets with a same shape, and the material of the annular thin sheets is an amorphous magnetic conductive material, whose power loss in an alternating magnetic field is lower than that of silicon steel, which hugely increases the efficiency of the electric motor.

公开(公告)号：US11699931B2

公开(公告)日：2023-07-11

申请号：US17364030

申请日：2021-06-30

Applicant: Jing-Jin Electric Technologies Co., Ltd.

Inventor： Xuan Zou ,  Liangliang Zhang ,  Chunshuang Feng ,  Chunxia Cai ,  Lei Han ,  Yang Zhang ,  Dandan Qi ,  Xin Xu ,  Kaihe Zhang ,  Biqing Sun

IPC: H02K1/27 ,  H02K1/276 ,  H02K1/24

CPC classification number: H02K1/2766 ,  H02K1/246 ,  H02K2213/03

Abstract: A rotor structure of a magnet motor includes a rotating shaft and an iron core on the rotating shaft. Magnet grooves are disposed inside the iron core along a circumferential direction with a magnet provided therein. A distance between an edge line of the magnet groove close to a circumferential edge of the iron core and the circumferential edge of the iron core varies so that a width of a flux barrier formed varies. One end of a long side of the magnet groove close to the circumferential edge is formed with an anti-demagnetization groove communicating with the magnet groove, and an edge line of the anti-demagnetization groove tilts toward the circumferential edge of the iron core. Process slots are provided between the magnet grooves and the circumferential edge of the iron core that are used to increase a salient rate and reluctance torque of the motor.

公开(公告)号：US11670996B2

公开(公告)日：2023-06-06

申请号：US17374307

申请日：2021-07-13

Applicant: Jing-Jin Electric Technologies Co., Ltd.

Inventor： Kaihe Zhang ,  Liangliang Zhang ,  Longyu Ju

IPC: H02K29/03 ,  H02K1/276

CPC classification number: H02K29/03 ,  H02K1/276 ,  H02K2201/06 ,  H02K2213/03

Abstract: A rotor core is provided for a step-skewing motor that includes rotor core segments mutually staggered by a preset angle. Each of the rotor core segments includes magnet slots along a circumferential direction, with a magnet provided in the magnet slot. An outer circular surface of each of the rotor core segments is provided thereon with a number of auxiliary grooves extending across the segment in an axial direction, and positions and/or cross-sectional shapes of the auxiliary grooves on the rotor core segments are not completely same so as to suppress torque ripple and vibration noise when the motor rotates.

公开(公告)号：US20230050332A1

公开(公告)日：2023-02-16

申请号：US17876342

申请日：2022-07-28

Applicant: Jing-Jin Electric Technologies Co., Ltd.

Inventor： Xin Xu ,  Liangliang Zhang ,  Lei Han ,  Chunxia Cai

IPC: H02K3/42 ,  H02K1/16 ,  H02K3/24

Abstract: A stator structure and a flat wire motor are provided. The stator structure comprises a stator core, stator windings and an avoidance layer. The stator core has an inner cylinder cavity, and a plurality of iron core slots arranged at intervals in a circumferential direction on an end face of the stator core. The iron core slot is communicated with the inner cylinder cavity via a slot opening. The stator windings have a plurality of layers of flat wire conductor wound in the iron core slots. The avoidance layer is located between the slot opening and a first layer of flat wire conductor in a radial direction of the stator core. During the operation of the flat wire motor with this stator structure, the skin effect caused by the high-frequency change of the magnetic field will act on the avoidance layer, thereby reducing the skin effect generated at the first layer of flat wire conductor, weakening the influence of the slot leakage flux on the first layer of flat wire conductor, reducing the eddy current loss of the first layer of flat wire conductor, and further reducing the eddy current loss of the whole motor, and thus achieving the technical effect of improving the motor efficiency.

公开(公告)号：US20220255385A1

公开(公告)日：2022-08-11

申请号：US17512030

申请日：2021-10-27

Applicant: Jing-Jin Electric Technologies Co., Ltd.

Inventor： Kaihe Zhang ,  Kunxing Sun ,  Liangliang Zhang ,  Chunxia Cai ,  Xuan Zou ,  Chunshuang Feng

IPC: H02K3/28

Abstract: The present disclosure discloses a stator assembly and motor. The stator assembly comprises a stator core and a multi-branch rectangular conductor winding, an even number of stator slots are provided on an inner circumference of the stator core, and each of the stator slots is divided into multiple layers for accommodating rectangular conductors. The multi-branch rectangular conductor winding is provided in the stator slots, and the multi-branch rectangular conductor winding comprises B number of parallel branches, and B is an integer multiple of 4. The number of slots per phase per pole, Q, of the stator assembly is an odd number, and Q and B satisfy a relationship that both (Q+1)*2/B and (Q−1)*2/B are integers. In the stator assembly of the present disclosure, by way of the special winding connection design, there is no phase difference of magnetic fields between the parallel branches, and each parallel branch equally passes through each layer in the stator slots, which fundamentally inhibits the generation of circulating current between the parallel branches, suppresses the harmonics, and improves the efficiency of the motor.