Motor stator and permanent magnet motor

Abstract

The embodiment of the utility model belongs to the technical field of motor equipment, and relates to a motor stator and a permanent magnet motor, and the motor stator comprises a stator iron core, a first winding, a second winding and a third winding. The stator iron core is arranged in an annular shape, the outer side face of the stator iron core is provided with a plurality of winding grooves evenly distributed in the annular circumference, and the positions, corresponding to the winding grooves, of the inner side wall of the stator iron core and the winding grooves form a winding area. And the first winding, the second winding and the third winding are sequentially wound in the winding areas which are adjacently arranged. Noise and vibration generated when the motor stator rotates can be effectively reduced, and stable rotation of the motor stator is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of audio equipment, and more specifically, to a motor stator and a permanent magnet motor. Background Art

[0002] The motor stator is a device used to drive the motor rotor so that the motor rotor obtains driving force. The motor stator generally includes a stator core and a coil winding. The stator core is provided with winding slots, and the coil winding is wound in the winding slots. A through hole is provided in the middle of the stator core, and the motor rotor is fixed at the center of the through hole. When it is necessary to drive the motor rotor to rotate, current is input into the coil winding on the winding slot to generate a magnetic field in the coil winding. The magnetic field interacts with the magnetic field of the stator core to form a torque, thereby driving the stator core to rotate. When the stator core rotates, the permanent magnet on the motor rotor is affected by the constantly changing magnetic field on the motor stator to rotate synchronously.

[0003] For three-phase motors, the winding slots on the stator core are generally arranged on the inner side of the stator core through hole, and the number of winding slots corresponds to the number of winding coils of the three-phase motor. The winding slots are formed by the inner wall of the stator core through hole being recessed toward the outer wall of the stator core. The winding slots are provided with a winding portion in the circumferential direction of the stator core, and the winding portion is composed of adjacent inner walls of the winding slots. The coil winding is wound on the winding portion to form a fixation. However, due to the structural arrangement of the winding slots, the tooth slot torque of the motor stator will be too large. At the same time, since the coil windings are independently wound in the winding slots, the winding coefficient will also be low, so that the motor stator will generate vibration and noise during rotation, and the speed will fluctuate, so that the motor stator cannot run smoothly. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the present application is how to reduce the vibration and noise of the motor stator and make the motor stator rotate smoothly.

[0005] In order to solve the above technical problems, the present application provides a motor stator, which adopts the following technical solution:

[0006] A motor stator comprises: a stator core, a first winding, a second winding and a third winding;

[0007] The stator core is arranged in a ring shape, and a plurality of winding grooves evenly distributed on the ring circumference are opened on the outer surface of the stator core. The inner wall of the stator core corresponds to the position of the winding grooves and forms a winding area with the winding grooves. The first winding, the second winding and the third winding are wound in sequence in the adjacently arranged winding areas.

[0008] Furthermore, the first winding, the second winding, and the third winding all include a head end coil group, a tail end coil group, and a connecting wire. The head end coil group and the tail end coil group of the same group are respectively connected to the two ends of the corresponding connecting wire. The connecting wire is arranged in an arc shape, and the center of the arc of the connecting wire is located on the axial centerline of the stator core.

[0009] Furthermore, the head-end coil group and the tail-end coil group of the same group are centrally symmetrical on the same cross section, and the center of symmetry is located on the axis of the stator core.

[0010] Furthermore, the connecting wire is arranged parallel to the end surface of the stator core.

[0011] Further, the connecting wires include a first connecting wire, a second connecting wire and a third connecting wire corresponding to the first winding, the second winding and the third winding respectively;

[0012] Both ends of the first connecting wire are respectively connected to connecting columns of a first height, so that there is a first height difference between the first connecting wire and the end surface of the stator core;

[0013] Both ends of the second connecting wire are respectively connected to connecting columns of a second height, so that there is a second height difference between the second connecting wire and the end surface of the stator core;

[0014] Both ends of the third connecting wire are respectively connected to connecting columns of a third height, so that there is a third height difference between the third connecting wire and the end surface of the stator core.

[0015] Furthermore, one end of the head-end coil group away from the corresponding connecting post also extends upward to form a winding head, and one end of the tail-end coil group away from the corresponding connecting post also extends upward to form a winding tail.

[0016] Furthermore, the surface of each of the head-end coil group and the tail-end coil group is evenly covered with a first insulating layer.

[0017] Furthermore, the surface of the winding area is evenly covered with a second insulating layer.

[0018] Furthermore, the winding groove includes a groove side wall and a groove bottom wall, the groove bottom wall is arranged in a circular surface, and the groove side wall and the groove bottom wall are inclined at a predetermined angle.

[0019] In order to solve the above technical problems, an embodiment of the present application further provides a permanent magnet motor, which adopts the motor stator as described above.

[0020] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0021] In this embodiment, a motor stator including a stator core, a first winding, a second winding and a third winding is provided, the stator core is provided in an annular shape, a plurality of winding grooves evenly distributed on the circumference are provided on the outer side surface of the annular circumference of the stator core, the inner side wall of the stator core corresponds to the position of the winding grooves and the winding grooves form a winding area, and the first winding, the second winding and the third winding are sequentially wound in the adjacently arranged winding areas, thereby effectively eliminating the cogging torque of the motor stator and increasing the winding coefficient of the motor stator, so as to reduce the noise and vibration generated when the motor stator rotates, and realize the smooth rotation of the motor electronics. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the motor stator of the present application;

[0024] Figure 2 This is a schematic diagram of the exploded structure of the motor stator of this application;

[0025] Figure 3 This is a schematic diagram of the circumferential surface of the motor stator of the present application;

[0026] Figure 4 This is a schematic diagram of the cross-sectional structure of the motor stator along the center line of the winding slot of the present application;

[0027] Figure markings: stator core 1, first winding 2, second winding 3, third winding 4, head end coil group 5, tail end coil group 6, connecting wire 7, winding slot 11, winding area 12, winding head 51, winding tail 61, first connecting wire 71, second connecting wire 72, third connecting wire 73, connecting column 74, first height difference A1, second height difference A2, third height difference A3, slot side wall 111, slot bottom wall 112. DETAILED DESCRIPTION

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0029] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] Embodiment of the motor stator of the present application

[0031] refer to Figure 1 to Figure 2 , the motor stator of the present application comprises: a stator core 1, a first winding 2, a second winding 3 and a third winding 4;

[0032] The stator core 1 is arranged in a ring shape, and a plurality of winding grooves 11 are evenly distributed on the ring circumference on the outer surface of the stator core 1. The inner wall of the stator core 1 corresponds to the position of the winding grooves 11 and forms a winding area 12 with the winding grooves 11. The first winding 2, the second winding 3 and the third winding 4 are wound in sequence in the adjacently arranged winding areas 12.

[0033] In this embodiment, the number of winding slots 11 is set to 6, and the 6 winding slots 11 are evenly distributed on the outer circumferential surface of the stator core 1. The inner wall of the stator core 1 is the inner circumferential surface corresponding to the outer circumferential surface, and the winding area 12 includes the winding slots 11 and the inner circumferential surface portion corresponding to the position of the winding slots 11. The first winding 2, the second winding 3, and the third winding 4 can be wound in the winding slots 11 in sequence in a clockwise or counterclockwise order.

[0034] In this embodiment, a motor stator including a stator core 1, a first winding 2, a second winding 3 and a third winding 4 is provided, the stator core 1 is set to be annular, a plurality of winding slots 11 evenly distributed on the circumference are opened on the outer side surface of the annular circumference of the stator core 1, the inner side wall of the stator core 1 corresponds to the position of the winding slots 11 and forms a winding area 12 with the winding slots 11, and the first winding 2, the second winding 3 and the third winding 4 are sequentially wound in the adjacently arranged winding areas 12, thereby effectively eliminating the cogging torque of the motor stator and increasing the winding coefficient of the motor stator, so as to reduce the noise and vibration generated when the motor stator rotates, and realize the smooth rotation of the motor electronics.

[0035] In an optional embodiment of the present embodiment, the first winding 2, the second winding 3, and the third winding 4 all include a head end coil group 5, a tail end coil group 6, and a connecting wire 7. The head end coil group 5 and the tail end coil group 6 of the same group are respectively connected to the two ends of the corresponding connecting wire 7. The connecting wire 7 is arranged in an arc shape, and the center of the arc of the connecting wire 7 is located on the axial centerline of the stator core 1.

[0036] In this embodiment, the head end coil group 5 refers to the end where the winding starts to be wound, the tail end coil group 6 refers to the end where the winding is completed, the connecting wire 7 is connected to the same side of the head end coil group 5 and the tail end coil group 6, and the head end coil group 5 and the tail end coil group 6 of the same group and the connecting wire 7 are connected to form a winding. In this embodiment, by setting the first winding 2, the second winding 3 and the third winding 4 including the head end coil group 5, the tail end coil group 6 and the connecting wire 7, the number of rotor poles of the motor is effectively controlled and the winding coefficient of the motor stator is increased. At the same time, by setting the center of the connecting wire 7 to correspond to the axis line of the stator core 1, the magnetic field generated by the connecting wire 7 when energized will not affect the rotation of the motor stator, and the stability of the device is effectively improved.

[0037] In another alternative embodiment of this embodiment, refer to Figures 2 to 4 The head end coil group 5 and the tail end coil group 6 of the same group are centrally symmetrical on the same cross section, and the center of symmetry is located on the axis of the stator core 1.

[0038] In this embodiment, when the head end coil group 5 and the tail end coil group 6 are wound in the winding groove 11, the head end coil group 5 and the tail end coil group 6 are in a diagonal relationship on the circumferential surface, and the starting position where the head end coil group 5 starts to be wound and the ending position where the tail end coil group 6 ends to be wound are located on the same side of the stator core 1. In this embodiment, the head end coil group 5 and the tail end coil group 6 are arranged symmetrically with respect to the axis of the stator core 1, so that the magnetic fields generated by the first winding 2, the second winding 3 and the third winding 4 when they are arranged will not interfere with each other, so as to improve the stability of the device.

[0039] In another optional embodiment of this embodiment, the connecting wire 7 is arranged parallel to the end surface of the stator core 1 .

[0040] In this embodiment, the end face of the stator core 1 refers to the upper and lower side faces of the stator core 1, and the connecting wires 7 of each winding are arranged parallel to the end faces of the stator core 1. In this embodiment, the connecting wires 7 are arranged parallel to the end faces of the stator core 1 so that the magnetic field generated by the connecting wires 7 is more uniform on the end faces of the stator core 1, thereby reducing the influence of the magnetic field generated by the connecting wires 7 on the magnetic field of the stator core 1, thereby effectively improving the overall stability of the device.

[0041] In another optional embodiment of the present embodiment, the connecting wire 7 includes a first connecting wire 71, a second connecting wire 72 and a third connecting wire 73 corresponding to the first winding 2, the second winding 3 and the third winding 4 respectively;

[0042] Both ends of the first connecting wire 71 are respectively connected with connecting columns 74a of a first height, so that there is a first height difference A1 between the first connecting wire 71 and the end surface of the stator core 1;

[0043] Both ends of the second connecting wire 72 are respectively connected with connecting pillars 74b of a second height, so that a second height difference A2 exists between the second connecting wire 72 and the end surface of the stator core 1;

[0044] Both ends of the third connecting wire 73 are respectively connected to connecting columns 74 c of a third height, so that a third height difference A3 exists between the third connecting wire 73 and the end surface of the stator core 1 .

[0045] In this embodiment, the first connecting line 71, the second connecting line 72 and the third connecting line 73 correspond to different circumferential angle positions on the circumference of the stator core 1, respectively. The first height difference A1 refers to the difference between the horizontal height of the first connecting line 71 and the horizontal height of the end face of the stator core 1, the second height difference A2 refers to the difference between the horizontal height of the second connecting line 72 and the horizontal height of the end face of the stator core 1, and the third height difference A3 refers to the difference between the horizontal height of the third connecting line 73 and the horizontal height of the end face of the stator core 1. In this embodiment, by setting the first connecting line 71, the second connecting line 72 and the third connecting line 73 at the positions of the first height difference A1, the second height difference A2 and the third height difference A3 from the end face of the stator core 1, the first winding 2, the second winding 3 and the third winding 4 will not interfere with each other when they are set, so that the first winding 2, the second winding 3 and the third winding 4 can be set conveniently.

[0046] In another optional embodiment of the present embodiment, one end of the head end coil group 5 away from the corresponding connecting column 74 also extends upward to form a winding head 51, and one end of the tail end coil group 6 away from the corresponding connecting column 74 also extends upward to form a winding tail 61.

[0047] This embodiment connects the winding head 51 and the winding tail 61 to the head end coil group 5 and the tail end coil group 6 respectively, so as to facilitate the connection of external powered devices, so that current can flow through the first winding 2, the second winding 3 and the third winding 4 to generate a magnetic field.

[0048] In yet another optional embodiment of the present embodiment, the surface of each of the head-end coil assembly 5 and the tail-end coil assembly 6 is uniformly covered with a first insulating layer.

[0049] In this embodiment, the head end coil group 5 and the tail end coil group 6 are immersed in insulating varnish for insulation treatment to generate a first insulating layer on their surface. In this embodiment, the first insulating layer is evenly covered on each head end coil group 5 and the tail end coil group 6, thereby effectively ensuring that the current will not cause leakage or short circuit when passing through the first winding 2, the second winding 3 and the third winding 4, thereby improving the safety of the device.

[0050] In yet another optional embodiment of the present embodiment, the surface of the winding area 12 is uniformly covered with a second insulating layer.

[0051] In this embodiment, an insulating material can be sprayed on the winding area 12 to form a uniformly covered second insulating layer. In this embodiment, by providing the second insulating layer on the winding area 12, it can effectively ensure that the current passing through the first winding 2, the second winding 3 and the third winding 4 will not affect the normal operation of the stator core 1, thereby improving the safety of the device.

[0052] In another optional embodiment of the present embodiment, the winding groove 11 includes a groove side wall 111 and a groove bottom wall 112 , the groove bottom wall 112 is arranged in a circular surface, and the groove side wall 111 and the groove bottom wall 112 are inclined at a predetermined angle.

[0053] In this embodiment, the slot bottom wall 112 is arranged in a circumferential surface corresponding to the inner side wall of the stator core 1, and a predetermined angle is formed between the slot side wall 111 and the slot bottom wall 112, and the angle of the angle is less than 90 degrees. In this embodiment, the predetermined angle is 85 degrees, which can be adjusted according to actual conditions. In this embodiment, the slot side wall 111 and the slot bottom wall 112 of the winding slot 11 are arranged at a predetermined angle, so as to effectively limit the first winding 2, the second winding 3 and the third winding 4 in the circumferential radial direction of the stator core 1, so as to improve the stability of the device.

[0054] An embodiment of the present application further provides a permanent magnet motor, which includes a motor rotor and a motor stator. The motor rotor is arranged at a middle position of the motor stator, and the motor stator adopts the motor stator described in any one of the above items.

[0055] This embodiment can effectively improve the permanent magnet motor by adopting the permanent magnet motor with the motor stator as described in any one of the above items.

[0056] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A motor stator, characterized in that: The motor stator comprises: a stator core, a first winding, a second winding and a third winding; The stator core is arranged in a ring shape, and a plurality of winding grooves evenly distributed on the ring circumference are opened on the outer surface of the stator core. The inner wall of the stator core corresponds to the position of the winding grooves and forms a winding area with the winding grooves. The first winding, the second winding and the third winding are wound in sequence in the adjacently arranged winding areas.

2. The motor stator according to claim 1, characterized in that: The first winding, the second winding, and the third winding all include a head end coil group, a tail end coil group, and a connecting wire. The head end coil group and the tail end coil group of the same group are respectively connected to the two ends of the corresponding connecting wire. The connecting wire is arranged in an arc shape, and the center of the arc of the connecting wire is located on the axial centerline of the stator core.

3. The motor stator according to claim 2, characterized in that: The head end coil group and the tail end coil group of the same group are centrally symmetrical on the same cross section, and the center of symmetry is located on the axis of the stator core.

4. The motor stator according to claim 2, characterized in that: The connecting wire is arranged parallel to the end surface of the stator core.

5. The motor stator according to claim 4, characterized in that: The connecting wires include a first connecting wire, a second connecting wire and a third connecting wire corresponding to the first winding, the second winding and the third winding respectively; Both ends of the first connecting wire are respectively connected to connecting columns of a first height, so that there is a first height difference between the first connecting wire and the end surface of the stator core; Both ends of the second connecting wire are respectively connected to connecting columns of a second height, so that there is a second height difference between the second connecting wire and the end surface of the stator core; Both ends of the third connecting wire are respectively connected to connecting columns of a third height, so that there is a third height difference between the third connecting wire and the end surface of the stator core.

6. The motor stator according to claim 5, characterized in that: One end of the head end coil group away from the corresponding connecting post further extends upward to form a winding head, and one end of the tail end coil group away from the corresponding connecting post further extends upward to form a winding tail.

7. The motor stator according to claim 6, characterized in that: The surface of each of the head-end coil group and the tail-end coil group is evenly covered with a first insulating layer.

8. The motor stator according to claim 1, characterized in that: The surface of the winding area is evenly covered with a second insulating layer.

9. The motor stator according to claim 1, characterized in that: The winding groove comprises a groove side wall and a groove bottom wall, the groove bottom wall is arranged in a circumferential surface, and the groove side wall and the groove bottom wall are inclined at a predetermined angle.

10. A permanent magnet motor, characterized in that: The permanent magnet motor adopts the motor stator according to any one of claims 1 to 9.

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