Permanent magnet coreless dual-rotor motor

Abstract

The utility model provides a permanent-magnet coreless dual-rotor motor, which comprises a casing, a first permanent-magnet rotor, a second permanent-magnet rotor, a stator winding, a cover and a central shaft. The first permanent magnet rotor is embedded in the inner side of the machine shell, the second permanent magnet rotor is embedded in the inner side of the machine cover, the stator winding is installed between the first permanent magnet rotor and the second permanent magnet rotor, the machine shell and the machine cover are fixedly installed in a buckled mode, and the first permanent magnet rotor, the second permanent magnet rotor and the stator winding are wrapped. The center shaft sequentially penetrates through the machine cover, the second permanent magnet rotor, the stator winding, the first permanent magnet rotor and the machine shell, and the center shaft and the stator winding are fixedly installed. The double-face electromagnetism of the stator winding is fully utilized, the utilization rate of the electromagnetism is remarkably improved, stronger driving force can be provided, and the electric energy conversion efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially relates to a permanent magnet double rotor motor without iron core. BACKGROUND

[0002] DC permanent magnet motor is the equipment of converting electric energy into mechanical energy, generally is by the alternating current in the battery or power grid through a converter conversion pure direct current through the armature winding produces magnetic field and stator permanent magnet field interaction makes the rotor rotate produces mechanical rotating force, the traditional rotor armature winding all adopts silicon steel material to do the core, and coil every turn is inlayed in silicon steel core, and only limit to utilize the helical electromagnetic field of stator winding in one direction, there are following defects in operation: 1, electric energy conversion is low, and power consumption is big;2, current passes through the core conversion magnetic field has iron loss, hysteresis, eddy current operation reaction speed is limited;3, use copper material more;4, silicon steel material is more, and temperature rises fast, 5, volume is big, and waste material 6, does not set protection function, when overload operation, winding is easy to damage;7, complex structure, manufacturing process is difficult.In industrial and agricultural production, national defense, science and technology and social daily life has played a great role, but the conversion efficiency of traditional motor is too low, causes energy waste.

[0003] Therefore, it is necessary to provide a permanent magnet double rotor motor without iron core to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a permanent magnet double rotor motor without iron core, removes the traditional silicon steel magnetic conducting material, fully utilizes the double-face positive-negative direction (N-S pole) electromagnetic field of stator winding, significantly improves the utilization of electromagnetism, can provide stronger driving force, increases electric energy conversion efficiency.

[0005] In order to realize the above-mentioned purpose, the technical scheme provided by the utility model is as follows: a permanent magnet double rotor motor without iron core, comprising a shell, a first permanent magnet rotor, a second permanent magnet rotor, a stator winding, a cover and a central shaft.

[0006] The first permanent magnet rotor is embedded on the inner side of the shell, the second permanent magnet rotor is embedded on the inner side of the cover, and the stator winding is installed between the first permanent magnet rotor and the second permanent magnet rotor.

[0007] The shell and the cover are fixedly installed by buckling, and the first permanent magnet rotor, the second permanent magnet rotor and the stator winding are wrapped, the central shaft passes through the cover, the second permanent magnet rotor, the stator winding, the first permanent magnet rotor and the shell in sequence, and the central shaft is fixedly installed with the stator winding.

[0008] Preferably, a wire hole is formed in the center of the central shaft.

[0009] Preferably, a first mounting hole is formed in the center of the casing, a second mounting hole is formed in the center of the cover, a first bearing is mounted in the first mounting hole, a second bearing is mounted in the second mounting hole, and the central shaft is inserted into the first bearing and the second bearing.

[0010] Preferably, the casing, the first permanent magnet rotor, the second permanent magnet rotor, the stator winding, the cover, the first bearing and the second bearing are coaxially arranged.

[0011] Preferably, the stator winding comprises a winding spider and a varnished coil, and the varnished coil is embedded on the winding spider.

[0012] Preferably, the number of the first permanent magnet rotor and the second permanent magnet rotor is multiple, and the multiple first permanent magnet rotors are annularly and spacedly arranged on the inner side of the casing, and the multiple second permanent magnet rotors are annularly and spacedly arranged on the inner side of the cover.

[0013] Compared with the prior art, the beneficial effects are that 1) the wires are used to pass through the central shaft and electrically connect with the stator winding to electrify the stator winding, when the stator winding is electrified, the positive and negative (N-S pole) electromagnetic fields are generated on the two sides of the stator winding, the magnetic force of repulsion is generated between the stator winding and the permanent magnet field on the two sides of the stator winding to make the first permanent magnet rotor and the second permanent magnet rotor rotate and output the rotary torque, the double-sided electromagnetic of the stator winding is fully utilized, the utilization rate of the electromagnetic is significantly improved, stronger driving force can be provided, and the electric energy conversion efficiency is increased.

[0014] 2) The design of the iron core-free structure can effectively reduce the noise and vibration in the operation process, reduce the working temperature of the whole machine, improve the user experience, and is particularly suitable for application occasions sensitive to noise.

[0015] Other features and advantages of the present application will be described in the following description, and some will be apparent from the description, or can be understood by the implementation of the present application. The features and advantages of the present application can be achieved and obtained by the elements and combinations specifically indicated in the appended claims. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings;

[0017] Figure 1 The exploded view of the permanent magnet iron core-free double-rotor motor provided by the present application.

[0018] Figure 2 For Figure 1 A perspective view of a permanent magnet coreless double rotor motor is shown.

[0019] Reference signs: 1, housing; 11, first mounting hole; 12, ventilation hole; 2, first permanent magnet rotor; 3, second permanent magnet rotor; 4, stator winding; 5, cover; 6, center shaft; 7, first bearing; 8, second bearing. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and beneficial technical effects of the utility model clearer and more understandable, the utility model will be further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described in the specification are only for the purpose of explaining the utility model and are not intended to limit the utility model.

[0021] It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0022] It should also be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing", "setting" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0023] In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third" can explicitly or implicitly include one or more features. In addition, the meaning of "multiple" and "several" is two or more, unless otherwise explicitly specified.

[0024] Please refer to Figures 1 to 2 The utility model provides a kind of permanent magnet coreless double rotor motor, including housing 1, first permanent magnet rotor 2, second permanent magnet rotor 3, stator winding 4, cover 5 and center shaft 6;

[0025] The first permanent magnet rotor 2 is embedded in the inner side of the casing 1, the second permanent magnet rotor 3 is embedded in the inner side of the cover 5, and the stator winding 4 is installed between the first permanent magnet rotor 2 and the second permanent magnet rotor 3,

[0026] The casing 1 and the cover 5 are fixedly installed by buckling, and the first permanent magnet rotor 2, the second permanent magnet rotor 3, and the stator winding 4 are wrapped, the center shaft 6 passes through the cover 5, the second permanent magnet rotor 3, the stator winding 4, the first permanent magnet rotor 2, and the casing 1 in sequence, and the center shaft 6 is fixedly installed with the stator winding 4.

[0027] In this way, the wires pass through the center shaft 6 and are electrically connected with the stator winding 4 to energize the stator winding 4, when the stator winding 4 is energized, electromagnetic fields are generated on both sides of the stator winding 4, and the magnetic forces repel each other with the permanent magnetic field on both sides of the stator winding 4 (the permanent magnetic field of the first permanent magnet rotor 2 and the second permanent magnet rotor 3) to make the first permanent magnet rotor 2 and the second permanent magnet rotor 3 rotate and output rotary torque, fully utilizing the double-sided electromagnetic field of the stator winding 4, significantly improving the utilization rate of the electromagnetic field, and being able to provide stronger driving force and increase the electric energy conversion efficiency.

[0028] In a preferred embodiment, a wire hole 61 is formed at the center of the center shaft 6 to facilitate the wires to pass through and be electrically connected with the stator winding 4.

[0029] In a preferred embodiment, a first installation hole 11 is formed at the center of the casing 1, a second installation hole 51 is formed at the center of the cover 5, a first bearing 7 is installed in the first installation hole 11, a second bearing 8 is installed in the second installation hole 51, and the center shaft 6 is inserted and installed in the first bearing 7 and the second bearing 8.

[0030] In a preferred embodiment, a ventilation hole 12 is formed on the side wall of the casing 1 to facilitate heat dissipation of the motor through the ventilation hole. It should be noted that the center shaft 6 can also use a general disc flange.

[0031] It should be noted that in the present embodiment, the end faces of the casing 1, the first permanent magnet rotor 2, the second permanent magnet rotor 3, the stator winding 4, and the cover 5 are circular, and the casing 1, the first permanent magnet rotor 2, the second permanent magnet rotor 3, the stator winding 4, the cover 5, the first bearing 7, and the second bearing 8 are coaxially arranged, which is conducive to stacking and installation, and reduces the overall volume and weight of the motor.

[0032] In a preferred embodiment, the stator winding 4 includes a winding bone disc 41 and a enameled coil 42, and the enameled coil 42 is embedded in the winding bone disc 41.

[0033] In the embodiment, the winding bone disc 42 is circular and is made of high-performance composite material (epoxy resin glue) pouring, and the winding bone disc 41 is arranged with enameled coil 42 (the enameled coil 42 is arranged and poured in a positioning mold). The number of the first permanent magnet rotor 2 and the second permanent magnet rotor 3 is multiple, and the multiple first permanent magnet rotors 2 are annularly and spacedly distributed on the inner side of the casing 1, and the multiple second permanent magnet rotors 3 are annularly and spacedly distributed on the inner side of the cover 5.

[0034] Therefore, when the motor operates, the external power supply is connected to the enameled coil 42 on the winding bone disc 41 through the wire inside the center shaft 6, the enameled coil 42 generates a magnetic field along the circumference of the winding bone disc 41 after being electrified, and the first permanent magnet rotor 2 and the second permanent magnet rotor 3 on both sides of the stator winding 4 are moved under the action of the magnetic field force, so as to drive the whole casing 1 and the cover 5 to rotate around the center shaft.

[0035] The utility model discloses a no core structure design, can effectively reduce the noise and vibration in the operation process, reduce the whole machine operating temperature, improve user experience, especially suitable for the application occasion of sensitive to noise. It should be noted that, in the embodiment, the whole machine of the permanent magnet no core double rotor motor is made of no silicon steel magnetic material.

[0036] The utility model discloses not only limit to the description in the specification and the embodiment, therefore for the person skilled in the field can easily realize additional advantages and modification, therefore under the condition of not deviating from the general concept of the spirit and scope defined by the claims and equivalent range, the utility model is not limited to specific details, representative equipment and the drawing example shown and described here.

Claims

1. A permanent magnet coreless dual rotor electric machine characterized by, The machine shell (1), the first permanent magnet rotor (2), the second permanent magnet rotor (3), the stator winding (4), the machine cover (5) and the central shaft (6) are provided. The first permanent magnet rotor (2) is embedded in the inner side of the machine shell (1), the second permanent magnet rotor (3) is embedded in the inner side of the machine cover (5), and the stator winding (4) is installed between the first permanent magnet rotor (2) and the second permanent magnet rotor (3). The machine shell (1) and the machine cover (5) are fixedly installed by buckling, and the first permanent magnet rotor (2), the second permanent magnet rotor (3) and the stator winding (4) are wrapped, the central shaft (6) passes through the machine cover (5), the second permanent magnet rotor (3), the stator winding (4), the first permanent magnet rotor (2) and the machine shell (1) in sequence, and the central shaft (6) is fixedly installed with the stator winding (4).

2. The coreless double rotor permanent magnet motor of claim 1, wherein, A wire hole (61) is formed in the center of the central shaft (6).

3. The coreless double rotor permanent magnet motor of claim 1, wherein, A first mounting hole (11) is formed in the center of the machine shell (1), a second mounting hole (51) is formed in the center of the machine cover (5), a first bearing (7) is installed in the first mounting hole (11), a second bearing (8) is installed in the second mounting hole (51), and the central shaft (6) is inserted and installed in the first bearing (7) and the second bearing (8).

4. The coreless double rotor permanent magnet motor of claim 3, wherein, The machine shell (1), the first permanent magnet rotor (2), the second permanent magnet rotor (3), the stator winding (4), the machine cover (5), the first bearing (7) and the second bearing (8) are coaxially arranged.

5. The coreless double rotor permanent magnet motor of claim 1, wherein, The stator winding (4) comprises a winding bone disc (41) and a enameled coil (42), and the enameled coil (42) is embedded in the winding bone disc (41).

6. The coreless double rotor permanent magnet motor of claim 1, wherein, The number of the first permanent magnet rotor (2) and the second permanent magnet rotor (3) is multiple, and multiple first permanent magnet rotors (2) are annularly and spacedly distributed in the inner side of the machine shell (1), and multiple second permanent magnet rotors (3) are annularly and spacedly distributed in the inner side of the machine cover (5).

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