Brushless motor

Abstract

The utility model discloses a brushless motor, and relates to the technical field of motors, the brushless motor comprises a plurality of first electromagnetic elements and a plurality of second electromagnetic elements, one of the first electromagnetic elements and the second electromagnetic elements is a coil, the other is a magnetic block, the coil is fixedly connected with a stator, and the magnetic block is fixedly connected with a rotor; the plurality of first electromagnetic elements are uniformly arranged along the circumferential direction to form a cylindrical inner electromagnetic element layer, and the outer side of the inner electromagnetic element layer is provided with a cylindrical outer electromagnetic element layer formed by uniformly arranging a plurality of second electromagnetic elements along the circumferential direction. The two radial sides of the inner electromagnetic element layer are each provided with an annular side electromagnetic element layer formed by evenly arranging a plurality of second electromagnetic elements in the circumferential direction, and the axes of the outer electromagnetic element layer, the inner electromagnetic element layer and the side electromagnetic element layers are collinear. According to the brushless motor, the side electromagnetic element layers are added, the number of coils or magnetic blocks is increased, the interaction force is increased, and then the torque is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a brushless motor. Background Art

[0002] The working principle of the brushless motor is that the electronic commutator (such as the Hall sensor) detects the position of the rotor and sends a signal to the controller. The controller controls the on and off and flow direction of the current in the stator coil according to the position of the rotor and the control strategy of the motor. In this process, when the stator coil is energized and generates a magnetic field, this magnetic field interacts with the magnetic field of the magnetic block on the rotor to generate torque to drive the rotor to rotate. By continuously changing the direction of the current in the stator coil, torque can be continuously generated to drive the motor to rotate continuously.

[0003] There are two types of brushless motors currently, one is a coil rotor and the other is a pole rotor. Usually only one set of coil layers and magnetic block layers are set between the two rotors and the stator. Regardless of the coil rotor or the pole rotor, the magnetic field generated on both sides of the radial direction is not utilized, which limits the output torque.

[0004] Therefore, it is necessary to propose a brushless motor to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The utility model aims to provide a brushless motor which can improve the utilization of magnetic field and thus increase the torque, so as to solve the problems raised in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the utility model is implemented through the following technical solutions: a brushless motor, comprising a plurality of first electromagnetic elements and a plurality of second electromagnetic elements, wherein one of the first electromagnetic element and the second electromagnetic element is a coil and the other is a magnetic block, the coil is fixedly connected to the stator, and the magnetic block is fixedly connected to the rotor;

[0009] A plurality of the first electromagnetic elements are evenly arranged along the circumferential direction to form a cylindrical inner electromagnetic element layer, a cylindrical outer electromagnetic element layer formed by a plurality of second electromagnetic elements evenly arranged along the circumferential direction is provided on the outer side of the inner electromagnetic element layer, and an annular side electromagnetic element layer formed by a plurality of second electromagnetic elements evenly arranged along the circumferential direction is provided on both radial sides of the inner electromagnetic element layer, and the axes of the outer electromagnetic element layer, the inner electromagnetic element layer and the side electromagnetic element layer are collinear.

[0010] Further, the first electromagnetic element is a coil, and the second electromagnetic element is a magnetic block;

[0011] The stator comprises a base, and the coil is fixedly connected to the base;

[0012] The rotor comprises a moving housing, the magnetic block is fixedly connected to the moving housing, a first rotating shaft is fixed to the middle of the moving housing, and the first rotating shaft is rotatably connected to the base.

[0013] Further, the first electromagnetic element is a magnetic block, and the second electromagnetic element is a coil;

[0014] The stator comprises a stator housing, and the coil is fixedly connected to the stator housing;

[0015] The rotor comprises a second rotating shaft, the magnetic block is fixedly connected to the second rotating shaft, and the second rotating shaft is rotatably connected to the stator housing.

[0016] Furthermore, the magnetic block is a permanent magnet.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a brushless motor with the following beneficial effects:

[0019] The brushless motor increases the number of coils or magnetic blocks and the interaction force between the stator and the rotor by arranging side electromagnetic element layers on both radial sides of the inner electromagnetic element layer, thereby increasing the torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure cross section of the first embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the distribution of coils and magnetic blocks in the first embodiment of the utility model;

[0022] Figure 3 This is a schematic cross-sectional view of the structure of the second embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of the distribution of coils and magnetic blocks in the second embodiment of the utility model.

[0024] In the figure: 1, outer electromagnetic component layer; 2, inner electromagnetic component layer; 3, side electromagnetic component layer; 4, machine base; 5, bearing; 6, first rotating shaft; 7, moving housing; 8, iron core; 9, fixed housing; 10, second rotating shaft. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "outside", "radial sides", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the present invention, unless otherwise clearly defined and limited, the terms "rotational connection", "fixed connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the description of this specification, the description with reference to the terms "some embodiments", "examples", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0029] See also Figure 1-4 As shown, it includes a plurality of first electromagnetic elements and a plurality of second electromagnetic elements, wherein the plurality of first electromagnetic elements are evenly arranged along the circumferential direction to form a cylindrical inner electromagnetic element layer 2, a cylindrical outer electromagnetic element layer 1 formed by a plurality of second electromagnetic elements evenly arranged along the circumferential direction is provided on the outer side of the inner electromagnetic element layer 2, and an annular side electromagnetic element layer 3 formed by a plurality of second electromagnetic elements evenly arranged along the circumferential direction is provided on both radial sides of the inner electromagnetic element layer 2, and the axes of the outer electromagnetic element layer 1, the inner electromagnetic element layer 2, and the side electromagnetic element layer 3 are collinear;

[0030] The first electromagnetic element and the second electromagnetic element, one is a coil and the other is a magnetic block;

[0031] The coil is fixedly connected to the stator, and the magnetic block is fixedly connected to the rotor.

[0032] Specifically, the magnetic block is a permanent magnet, and the coil is wound around the outside of the iron core 8 .

[0033] The working principle of the current brushless motor is that the electronic commutator (such as the Hall sensor) detects the position of the rotor and sends a signal to the controller. The controller controls the on and off and flow direction of the current in the stator coil according to the position of the rotor and the control strategy of the motor. In this process, when the stator coil is energized and generates a magnetic field, this magnetic field interacts with the magnetic field of the magnetic block on the rotor to generate torque to drive the rotor to rotate. By continuously changing the direction of the current in the stator coil, torque can be continuously generated to drive the motor to rotate continuously.

[0034] On the basis of the existing brushless motor, by adding a side electromagnetic element layer 3, the number of coils or magnetic blocks is increased, and the interaction force thereof is increased, thereby increasing the torque.

[0035] Embodiment 1

[0036] See also Figure 1-2 As shown, in this embodiment, the first electromagnetic element is a coil, and the second electromagnetic element is a magnetic block; the stator includes a base 4, and the coil is fixedly connected to the base 4; the rotor includes a moving housing 7, and the magnetic block is fixedly connected to the moving housing 7, and a first rotating shaft 6 is fixed in the middle of the moving housing 7, and the first rotating shaft 6 is rotatably connected to the base 4 through a bearing 5.

[0037] By adding side electromagnetic element layers 3 on both radial sides of the inner electromagnetic element layer 2 composed of multiple coils, when the coils are energized, the magnetic fields of the magnetic blocks of the side electromagnetic element layer 3 and the magnetic blocks of the outer electromagnetic element layer 1 act together on the magnetic field generated by the coils located in the inner electromagnetic element layer 2, thereby increasing the interaction force and thus increasing the torque. When the magnetic field generated by the coils being energized interacts with the magnetic field of the magnetic blocks on the rotor and drives the housing moving housing 7 to rotate, the housing moving housing 7 drives the first rotating shaft 6 to rotate, and the power is output through the first rotating shaft 6.

[0038] Embodiment 2

[0039] See also Figure 3-4 As shown, in this embodiment, the first electromagnetic element is a magnetic block, and the second electromagnetic element is a coil; the stator includes a stator housing 9, and the coil is fixedly connected to the stator housing 9; the rotor includes a second rotating shaft 10, the magnetic block is fixedly connected to the second rotating shaft 10, and the second rotating shaft 10 is rotatably connected to the stator housing 9 through a bearing 5.

[0040] By adding side electromagnetic element layers 3 on both radial sides of the inner electromagnetic element layer 2 composed of multiple magnetic blocks, after the coil is energized, the magnetic fields generated by the coils of the side electromagnetic element layer 3 and the coils of the outer electromagnetic element layer 1 act together on the magnetic blocks located in the inner electromagnetic element layer 2, thereby increasing the interaction force and thus increasing the torque. When the magnetic field generated by the coil being energized interacts with the magnetic field of the magnetic blocks on the rotor and drives the inner electromagnetic element layer 2 to rotate, the stator shell 9 drives the second rotating shaft 10 to rotate, and the power is output through the second rotating shaft 10.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brushless motor, characterized in that: It comprises a plurality of first electromagnetic elements and a plurality of second electromagnetic elements, wherein one of the first electromagnetic element and the second electromagnetic element is a coil and the other is a magnetic block, the coil is fixedly connected to the stator, and the magnetic block is fixedly connected to the rotor; A plurality of the first electromagnetic elements are evenly arranged in a circumferential direction to form a cylindrical inner electromagnetic element layer (2); a cylindrical outer electromagnetic element layer (1) formed by a plurality of second electromagnetic elements evenly arranged in a circumferential direction is provided on the outer side of the inner electromagnetic element layer (2); and an annular side electromagnetic element layer (3) formed by a plurality of second electromagnetic elements evenly arranged in a circumferential direction is provided on both radial sides of the inner electromagnetic element layer (2); the axes of the outer electromagnetic element layer (1), the inner electromagnetic element layer (2), and the side electromagnetic element layer (3) are collinear.

2. A brushless motor according to claim 1, characterized in that: The first electromagnetic element is a coil, and the second electromagnetic element is a magnetic block; The stator comprises a machine base (4), and the coil is fixedly connected to the machine base (4); The rotor comprises a moving housing (7), the magnetic block is fixedly connected to the moving housing (7), a first rotating shaft (6) is fixed in the middle of the moving housing (7), and the first rotating shaft (6) is rotatably connected to the base (4).

3. A brushless motor according to claim 1, characterized in that: The first electromagnetic element is a magnetic block, and the second electromagnetic element is a coil; The stator comprises a stator housing (9), and the coil is fixedly connected to the stator housing (9); The rotor comprises a second rotating shaft (10), the magnetic block is fixedly connected to the second rotating shaft (10), and the second rotating shaft (10) is rotatably connected to the stator housing (9).

4. A brushless motor according to claim 1, characterized in that: The magnetic block is a permanent magnet.

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