Hollow cup stator yoke iron core structure for fan

Abstract

The utility model discloses a hollow cup stator yoke part iron core structure for a fan, which comprises a stator iron core, a mounting frame is inserted in the stator iron core, copper wires are symmetrically wound on the periphery of the mounting frame in the circumferential direction, and the yoke part of the stator iron core is provided with a groove part for threading. The beneficial effects of the utility model are that a stator tooth part is canceled, the yoke part is directly slotted, the torque ripple of the motor is reduced and the motor is more stable because the iron core has no teeth and the motor has no cogging torque, compared with the existing coreless motor, the magnetic resistance is reduced, the magnetic flux leakage is reduced and the performance of the motor is improved because no plastic mounting rack is arranged, and the winding tooth part is canceled, so that the cost is reduced. As the air gap is not changed, the outer diameter of the rotor can be correspondingly increased, and the torque of the rotor is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a hollow cup stator yoke iron core structure for a fan. Background Art

[0002] The coreless fan structure eliminates the iron core, which essentially solves the various problems caused by the iron core structure. Therefore, in addition to the high power density brought by the small size, the coreless fan motor also has the characteristics of high efficiency, fast speed, and fast response, and is widely used in fans.

[0003] The stator core of the existing brushless hollow cup motor is composed of silicon steel sheets and a plastic mounting frame. The plastic mounting frame is prone to deformation due to its insufficient rigidity, so it has extremely high requirements on the winding process and magnetic leakage occurs. Utility Model Content

[0004] The utility model aims to provide a hollow cup stator yoke core structure for a fan to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hollow cup stator yoke core structure for a fan, comprising a stator core, a mounting frame is inserted inside the stator core, copper wires are symmetrically wound around the mounting frame in a circumferential direction, and a groove for threading is provided on the stator core yoke.

[0006] For further optimization, the surface of the slot for threading the wires provided in the yoke of the stator core is coated with an insulating layer.

[0007] For further optimization, the inner wall of the stator core is symmetrically provided with protrusions for plug-in connection with the mounting frame.

[0008] As a further optimization, a groove for plugging and connecting with the protruding portion is provided on the outer side of the mounting frame.

[0009] For further optimization, the copper wire is a flat wire structure, and the flat wire structure is installed corresponding to the mounting beams arranged around the mounting frame in a circumferential direction.

[0010] Beneficial Effects

[0011] The utility model provides a hollow cup stator yoke core structure for a fan, eliminates the stator teeth and directly slots the yoke. Since the core has no teeth, the motor has no tooth slot torque, which reduces the torque fluctuation of the motor and makes the motor more stable. Compared with the existing hollow cup motor, the magnetic resistance is reduced and the leakage magnetic flux is reduced due to the lack of a plastic mounting frame, thereby improving the motor performance. Since the winding teeth are eliminated, the inner diameter of the stator is increased, and since the air gap remains unchanged, the outer diameter of the rotor can be increased accordingly, thereby increasing the rotor torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic top view of the overall structure of the utility model;

[0013] Figure 2 It is an exploded schematic diagram of the overall structure of the utility model. DETAILED DESCRIPTION

[0014] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0015] Example

[0016] like Figure 1-2 As shown, a hollow cup stator yoke core structure for a fan includes a stator core 1, a mounting frame 3 is inserted inside the stator core 1, copper wires 2 are symmetrically wound around the mounting frame 3 in a circumferential direction, and a groove for threading is opened on the yoke of the stator core 1.

[0017] In this embodiment, the surface of the groove for threading provided on the yoke of the stator core 1 is coated with an insulating layer. The inner wall of the stator core 1 is symmetrically provided with protrusions 4 for plugging and connecting with the mounting frame 3, which makes plugging and connecting more convenient and the connection tighter. A groove 5 for plugging and connecting with the protrusion 4 is provided on the outer side of the mounting frame 3. The copper wire 2 is a flat wire structure, and the flat wire structure is installed corresponding to the mounting beam provided around the mounting frame 3 in a circumferential direction. The inner wall of the stator core 1 is symmetrically provided with protrusions 4 for plugging and connecting with the mounting frame 3. The protrusions 4 can be provided on the outer wall of the mounting frame 3, and the inner wall of the stator core 1 is provided with corresponding grooves 5, and the two can be replaced according to actual needs;

[0018] The brushless hollow cup stator structure in the prior art is composed of a yoke core and a plastic mounting frame, and the coil is fixed on the plastic mounting frame, which reduces the weight of the stator core, thereby reducing iron loss and improving efficiency. However, due to the insufficient rigidity of the plastic mounting frame, it is easy to deform, and the winding process is extremely demanding. In addition, due to the absence of a toothed core, the magnetic resistance becomes larger, which is easy to cause magnetic leakage, affecting the performance of the motor.

[0019] Reduce torque fluctuation; reduce motor leakage, improve motor performance and torque; reduce motor failure caused by weak rigidity of plastic mounting frame; modularize and facilitate maintenance, slots can be directly opened on the stator core yoke, insulation can be applied in the slotted area, and concentrated winding can be used.

[0020] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the utility model content within the protection scope of the utility model.

Claims

1. A hollow cup stator yoke core structure for a fan, characterized in that: It comprises a stator core (1), wherein a mounting frame (3) is inserted inside the stator core (1), copper wires (2) are symmetrically wound around the mounting frame (3) in a circumferential direction, and a groove for threading the wires is provided on the yoke of the stator core (1).

2. The hollow cup stator yoke core structure for a fan according to claim 1, characterized in that: The surface of the slot for threading the wire, which is provided on the yoke of the stator core (1), is coated with an insulating layer.

3. The hollow cup stator yoke core structure for a fan according to claim 1, characterized in that: The inner wall of the stator core (1) is symmetrically provided with protrusions (4) for being plug-in-connected with the mounting frame (3).

4. The hollow cup stator yoke core structure for a fan according to claim 3, characterized in that: The outer side of the mounting frame (3) is provided with a groove (5) for insertion connection with the raised portion (4).

5. The hollow cup stator yoke core structure for a fan according to claim 1, characterized in that: The copper wire (2) is a flat wire structure, and the flat wire structure is installed corresponding to the installation beams arranged around the installation frame (3) in a circumferential direction.

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