Outer rotor winding motor capable of realizing multi-turn continuous winding

Abstract

The utility model relates to the technical field of motors, and discloses an outer rotor winding motor capable of multi-turn continuous winding, which comprises a base, a motor shaft is rotatably connected in the base, the motor shaft is coaxially and fixedly connected with a casing, an outer rotor iron core is fixedly connected on the inner wall of the casing, and a plurality of first open slots are arranged on the inner side of the outer rotor iron core along the circumferential direction at intervals. One end, relatively close to the axis of the outer rotor iron core, of the first open slot penetrates through the outer rotor iron core in the radial direction, and the first open slot is used for arranging a coil of an outer rotor winding; the outer rotor winding is electrically connected with a first control assembly used for adjusting current or voltage of the outer rotor winding. A stator shaft is fixedly connected in the machine base, an inner stator iron core is fixedly connected to the position, opposite to the outer rotor, of the outer circumferential face of the stator shaft in a sleeving mode, and a plurality of second coil opening grooves used for arranging inner stator windings are formed in the outer side of the inner stator iron core in the circumferential direction at intervals. According to the utility model, the parameter design range of the motor can be expanded for adjustment and optimization, and more operation conditions and load requirements can be met.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to an external rotor wound motor capable of multiple turns of continuous winding. Background Technology

[0002] Wound rotor motors are commonly used in high-power applications. Their rotor current can be adjusted by an external power supply, allowing for a larger starting torque, making them particularly suitable for heavy-load starting applications. Traditional wound rotor motors typically employ an outer stator 1 and an inner rotor 2. The inner rotor 2 includes an iron core and windings. The inner rotor windings are usually made of hard wire directly formed from flat sintered copper wire, possessing good conductivity and mechanical strength. The coils of the inner rotor windings are wound within the core slots 4 of the inner rotor iron core 3. Due to centrifugal force, to better fix the inner rotor windings within the core slots 4, such as... Figure 1 As shown, the core slot 4 of the inner rotor core 3 is usually set as a closed slot, while the inner rotor winding is a hard wire winding. The inner rotor winding adopts an insert-type structure where the hard wire coil is inserted and assembled into the closed slot. Therefore, it is impossible to form a complete coil at the end of the inner rotor winding during manufacturing. Figure 2 As shown, the insert-type hard wire coil 5 needs to be fixed to the iron core slot 4 of the inner rotor before the end coil 6 can be used for end welding to form a complete coil. Due to the limited welding amount and process difficulty, the number of turns of the hard wire coil 5 cannot be too many. The hard wire coil 5 is generally a single turn or two turns, which results in a limited range of motor design parameters that are difficult to adjust and optimize, and is not convenient to adapt to different operating conditions and load requirements. Utility Model Content

[0003] In view of this, the present invention provides an external rotor wound motor that can be wound with multiple turns to solve the problem that the design parameters of existing wound rotor motors are limited in range and difficult to adjust and optimize, resulting in difficulty in adapting to different operating conditions and load requirements.

[0004] This utility model provides an external rotor wound motor capable of multi-turn continuous winding, comprising:

[0005] Base;

[0006] The motor shaft is rotatably connected within the base;

[0007] The stator shaft is fixedly connected inside the machine base;

[0008] The housing is coaxially and fixedly connected to the motor shaft;

[0009] An outer rotor includes an outer rotor core and an outer rotor winding, the outer rotor core is fixedly connected to the inner wall of the casing, a plurality of first open slots are arranged on the inner side of the outer rotor core along the circumferential direction of the outer rotor core, the first open slots are arranged through along the radial direction of the outer rotor core relative to the one end close to the axis of the outer rotor core, and the first open slots are used for arranging the coils of the outer rotor winding;

[0010] A first control assembly is electrically connected to the outer rotor winding, and is used for adjusting the current or voltage of the outer rotor;

[0011] An inner stator includes an inner stator core and an inner stator winding, the inner stator core is fixedly sleeved on the outer circumferential surface of the stator shaft and is arranged opposite to the outer rotor, a plurality of second open slots are arranged on the outer side of the inner stator core along the circumferential direction of the inner stator core, the second open slots are arranged through along the radial direction of the inner stator core relative to the one end away from the axis of the inner stator core, and the second open slots are used for arranging the coils of the inner stator winding; the inner stator winding is electrically connected to a second control assembly, the second control assembly is used for adjusting the current or voltage of the inner stator; and the inner stator is used for generating a rotating magnetic field by being electrified.

[0012] The outer rotor winding motor with multiple turns of winding has at least the following beneficial effects:

[0013] The plurality of first open slots are arranged on the inner side of the outer rotor core, and the one end of the first open slots facing inwards is arranged through along the radial direction of the outer rotor core, so that the complete hard wire coil can be directly nested into the first open slots from the inner side of the outer rotor core to complete the assembly, thus the coil of the outer rotor winding can be directly formed into a complete coil during manufacturing, without the need of fixing the coil in the first open slots and then welding the end part, the assembly process is simple, the coil of the outer rotor winding can be made into multiple turns, the voltage adjustment range of the first control assembly on the outer rotor is expanded, the parameter design range of the motor is expanded, and more operating conditions and load requirements can be adapted; meanwhile, the plurality of second open slots are arranged on the outer side of the inner stator core, and the one end of the second open slots facing outwards is arranged through along the radial direction of the inner stator core, so that the complete hard wire coil can be directly nested into the second open slots from the outer side of the inner stator core to complete the assembly, thus the coil of the inner stator winding can be directly formed into a complete coil during manufacturing, without the need of fixing the coil in the second open slots and then welding the end part, the assembly process is simple, the coil of the inner stator winding can be made into multiple turns, the voltage adjustment range of the second control assembly on the inner stator is expanded, the parameter design range of the motor of the embodiment is expanded for adjustment and optimization, and more operating conditions and load requirements can be adapted.

[0014] In an alternative embodiment, the portion of the outer rotor winding extending axially beyond the outer rotor core is provided as a mounting end, and the mounting end is adhered to the inner wall of the machine housing by epoxy glue relative to the end face of the inner wall.

[0015] In an alternative embodiment, the stator shaft is provided with a water channel arranged axially in a spiral shape inside the stator shaft, the water channel is arranged opposite to the inner stator, the water channel is used for flowing cooling liquid, one end of the water channel is communicated with an inlet pipe, and the other end of the water channel is communicated with an outlet pipe.

[0016] In an alternative embodiment, the stator shaft comprises a first part and a second part, the outer circumferential surface of the first part is provided with a water flow groove in an axial spiral shape, and the first part is provided in an interference fit in the second part; the water flow groove and the inner circumferential surface of the second part form the water channel.

[0017] In an alternative embodiment, the second control assembly is arranged on an outer side wall of the machine base along the axial direction, one end of the stator shaft extending out of the machine base relative to the second control assembly, and a first threading hole is arranged axially in the middle part of the stator shaft, and a second threading hole is arranged on the outer wall of the stator shaft along the radial direction of the stator shaft, and the second threading hole is communicated with the first threading hole; the second control assembly is electrically connected to the inner stator winding through a first lead wire, and the first lead wire passes through the first threading hole and the second threading hole in sequence.

[0018] In an alternative embodiment, the stator shaft is coaxially provided with an inner hole along the axial direction, the motor shaft is provided in a coaxial clearance fit in the inner hole, and the motor shaft extends out of the inner hole at both ends along the axial direction and is rotatably connected to the side wall of the machine base through a first bearing; the machine housing comprises a connecting plate coaxially connected to the outer circumferential surface of the motor shaft, and the connecting plate is provided with a mounting cylinder relative to the end face of the inner stator along the axial direction, and the outer rotor core is arranged on the inner wall of the mounting cylinder.

[0019] In an alternative embodiment, the outer rotor winding is electrically connected to the first control assembly through a slip ring carbon brush assembly, the slip ring carbon brush assembly comprises a slip ring and a carbon brush, the slip ring is fixedly sleeved on the outer circumferential surface of the motor shaft and located on the side of the connecting plate away from the mounting cylinder, and the carbon brush is connected to the inner wall of the machine base through a brush holder.

[0020] In an alternative embodiment, the machine base is detachably connected with an end cover at one end relative to the slip ring carbon brush assembly along the axial direction by means of bolts.

[0021] In an alternative embodiment, the housing comprises a cylinder, the outer rotor core is arranged on the inner wall of the cylinder, the cylinder is provided with a first connecting flange and a second connecting flange at two axial ends respectively, the first connecting flange is rotatably connected to the stator shaft through a second bearing; the end face of the second connecting flange relatively close to the first connecting flange is coaxially provided with a mounting disc, the mounting disc is rotatably connected to the end of the stator shaft through a third bearing; the motor shaft is coaxially connected to the end face of the second connecting flange relatively far away from the first connecting flange.

[0022] In an alternative embodiment, the outer rotor winding is electrically connected to the first control assembly through a slip ring carbon brush assembly, the slip ring carbon brush assembly comprises a slip ring and a carbon brush, the slip ring is fixedly sleeved on the outer circumferential surface of the motor shaft, and the carbon brush is connected to the inner wall of the housing through a brush holder; the end cover is detachably connected to the one end of the housing relatively close to the slip ring carbon brush assembly through bolts in the axial direction. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0024] Figure 1 It is a structural schematic diagram of the prior art winding rotor motor;

[0025] Figure 2 It is a partial structural schematic diagram of the prior art winding rotor motor in which the plug-in coil is fixed in the core slot of the inner rotor;

[0026] Figure 3 It is a structural schematic diagram of the first embodiment of the present application;

[0027] Figure 4 It is a partial structural schematic diagram of the first embodiment of the present application; Figure 3

[0028] Figure 5 It is a structural schematic diagram of the second embodiment of the present application;

[0029] Figure 6 It is a partial structural schematic diagram of the second embodiment of the present application; Figure 5

[0030] Figure 7 It is an assembly schematic diagram of the outer rotor core and the inner stator core in the embodiment of the present application;

[0031] ​​Figure 8 It is the partial view of the outer rotor winding assembled in the first opening slot in the embodiment of the utility model;

[0032] Figure 9 It is the partial view of the inner stator winding assembled in the second opening slot in the embodiment of the utility model.

[0033] Mark explanation:

[0034] 1-outer stator, 2-inner rotor, 3-inner rotor core, 4-core slot, 5-insertion type hard wire coil, 6-end coil

[0035] 100-machine base, 110-end cover, 120-third threading hole, 130-first hole;

[0036] 200-motor shaft, 210-first bearing, 220-output end;

[0037] 300-stator shaft, 310-water channel, 320-water inlet pipe, 330-water outlet pipe, 340-first part, 341-first threading hole, 342-second threading hole, 343-inner hole, 344-water inlet interface, 345-water outlet interface, 346-first channel, 347-second channel, 350-second part;

[0038] 400-casing, 410-connection plate, 420-mounting cylinder, 421-flow guide groove, 430-cylinder, 440-first connection flange, 441-second bearing, 450-second connection flange, 451-mounting disc, 452-third bearing;

[0039] 500-outer rotor, 510-outer rotor core, 511-first opening slot, 520-outer rotor winding, 521-mounting end, 522-epoxy glue;

[0040] 600-first control assembly, 610-second lead wire;

[0041] 700-inner stator, 710-inner stator core, 711-second opening slot, 720-inner stator winding;

[0042] 800-second control assembly, 810-first lead wire;

[0043] 910-current collector ring, 920-carbon brush, 930-brush holder. Specific implementation

[0044] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0045] In the description of the present embodiment, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present embodiment and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present embodiment. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present embodiment, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; 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 communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present embodiment can be understood according to the specific circumstances.

[0047] The embodiments of the present application will be described below in combination with Figures 3 to 9 .

[0048] According to the embodiment of the utility model provides a kind of outer rotor motor of multiple turns winding, including base 100 and outer rotor 500, the motor shaft 200 is rotatably connected in the base 100, the motor shaft 200 coaxially fixedly connected with machine shell 400, the outer rotor 500 includes outer rotor core 510 and outer rotor winding 520, the inner wall of the machine shell 400 is fixedly connected to the outer rotor core 510, the inside of the outer rotor core 510 is spaced apart and is provided with a plurality of first open slots 511 along the circumference of the outer rotor core 510, the first open slot 511 is relatively close to the axis of the outer rotor core 510 and is provided with an end along the radial direction of the outer rotor core 510, and the first open slot 511 is used to set the coil of the outer rotor winding 520;The first control assembly 600 is electrically connected to the outer rotor winding 520, and the first control assembly 600 is used to adjust the current or voltage of the outer rotor 500;The stator shaft 300 is fixedly connected in the base 100, the inner stator 700 is fixedly sleeved on the outer circumferential surface of the stator shaft 300, the inner stator 700 is arranged opposite to the outer rotor 500, and is used to generate rotating magnetic field by energization;The inner stator 700 includes inner stator core 710 and inner stator winding 720, the inner stator core 710 is fixedly sleeved on the outer circumferential surface of the stator shaft 300, the outer side of the inner stator core 710 is spaced apart and is provided with a plurality of second open slots 711 along the circumference of the inner stator core 710, the second open slot 711 is relatively far away from the axis of the inner stator core 710 and is provided with an end along the radial direction of the inner stator core 710, and the second open slot 711 is used to set the coil of the inner stator winding 720;The second control assembly 800 is electrically connected to the inner stator winding 720, and the second control assembly 800 is used to adjust the current or voltage of the inner stator 700.

[0049] The multiple turns winding motor of the embodiment is provided with a plurality of first open slots 511 on the inside of the outer rotor core 510, and an end of the first open slot 511 towards the inside is provided with an end along the radial direction of the outer rotor core 510, as shown in Figure 8 The complete hard coil can be directly nested into the first open slot 511 from the inside of the outer rotor core 510 to complete assembly, so that the coil of the outer rotor winding 520 can be directly formed into a complete coil when manufactured, without the need for fixing the coil in the first open slot 511 and then welding the end, and the assembly process is simple, and the coil of the outer rotor winding 520 can be made into multiple turns, the voltage adjustment range of the first control assembly 600 on the outer rotor 500 is expanded, thereby expanding the parameter design range of the motor of the embodiment to adjust and optimize, and further adapting to more operating conditions and load requirements. Meanwhile, a plurality of second open slots 711 are provided on the outside of the inner stator core 710, and an end of the second open slot 711 towards the outside is provided with an end along the radial direction of the inner stator core 710, as shown in Figure 9As shown, the complete hard coil is directly assembled into the second open slot 711 from the outside of the inner stator core 710, so that the coil of the inner stator winding 720 can be directly formed into a complete coil during manufacturing, without the need for fixing the coil to the second open slot 711 and then welding the end portion, so that the assembly and fixing process is simple, and the coil of the inner stator winding 720 can be made into multiple turns, thereby expanding the voltage regulation range of the second control assembly 800 on the inner stator 700, so as to expand the parameter design range of the motor of the embodiment to adjust and optimize, and thus adapt to more operating conditions and load requirements.

[0050] It should be noted that, because the centrifugal force borne by the outer rotor 500 during rotation is along the radial direction of the outer rotor core 510, the stability of the coil of the outer rotor winding 520 arranged in the first open slot 511 which is open inwardly is basically not affected by the centrifugal force, and is not prone to breakage or damage. Because the inner stator 700 is fixed and does not rotate, there is no centrifugal force acting, so that the open end of the second open slot 711 of the inner stator core 710 is arranged inwardly, which does not affect the stability of the coil installation of the inner stator winding 720.

[0051] It can be understood that the coil of the outer rotor winding 520 can be made into multiple turns, so that the matching degree of the outer rotor winding 520 and the first control assembly 600 is better, the induced voltage generated by the conductor of the outer rotor 500 can be changed in a large range according to the number of turns in series of each phase, so as to change the current of the outer rotor winding 520 in a large range, thereby adapting to more operating conditions and load requirements. The coil of the inner stator winding 720 can be made into multiple turns, so that the matching degree of the inner stator winding 720 and the second control assembly 800 is better, the current of the inner stator winding 720 can be changed in a large range according to the number of turns in series of each phase, thereby adapting to more operating conditions and load requirements.

[0052] It should be noted that the output torque process of the multi-turn winding motor of the embodiment is that: the external power source supplies power to the inner stator 700 to generate a rotating magnetic field, the coil in the outer rotor winding 520 cuts the rotating magnetic field generated by the inner stator 700 to form an induced current, the outer rotor winding 520 generates an induced magnetic field while generating an induced current, the induced magnetic field generated by the outer rotor winding 520 interacts with the rotating magnetic field generated by the inner stator 700 to generate an electromagnetic torque, so that the motor shaft 200 rotates with the outer rotor 500 and the housing 400 to output torque.

[0053] The speed regulation process of the multi-turn winding motor of the embodiment is as follows: the first control component 600 adjusts the voltage size of the external power source delivered to the outer rotor winding 520, changes the size of the induced current of the outer rotor 500, thereby adjusting the size of the electromagnetic torque generated by the interaction of the induced magnetic field generated by the outer rotor winding 520 and the rotating magnetic field generated by the inner stator 700, and further controlling the motor shaft 200 to output at different rotational speeds to realize the speed regulation function. The second control component 800 can also adjust the voltage size of the external power source delivered to the inner stator winding 720, change the size of the current delivered to the inner stator 700, thereby adjusting the size of the electromagnetic torque generated by the interaction of the rotating magnetic field generated by the inner stator 700 and the induced magnetic field generated by the outer rotor winding 520, and further controlling the motor shaft 200 to output at different rotational speeds to realize the speed regulation function.

[0054] It can be understood that the motor shaft 200, the stator shaft 300, the machine shell 400, the outer rotor 500, and the inner stator 700 are coaxially arranged, and the axial directions of the five are the same direction; the axial direction described herein refers to the axial direction of the motor shaft 200, and for the convenience of description, the axial direction shown in Figure 3 or Figure 5 is taken as the axial direction of the motor shaft 200 for description, but it should not be understood as a definite limitation of the axial direction of the motor shaft 200.

[0055] As shown in Figure 3 and Figure 5 , specifically, the part of the outer rotor winding 520 extending to the outside of the outer rotor core 510 in the axial direction is provided as a mounting end portion 521, and the mounting end portion 521 is bonded to the inner wall of the machine shell 400 by epoxy glue 522 relative to the end face of the inner wall of the machine shell 400. The mounting end portion 521 is fixed by the epoxy glue 522 to generate a support point at both ends of the outer rotor winding 520, thereby reducing the centrifugal force received during rotation.

[0056] The first control component 600 adjusts the current size or voltage size of the external power source delivered to the outer rotor winding 520 according to the actual needs of the load to realize the adjustment of the motor output rotational speed; specifically, the first control component 600 includes a variable resistor or a frequency converter. The second control component 800 adjusts the current size or voltage size of the external power source delivered to the inner stator winding 720 according to the actual needs of the load to realize the adjustment of the motor output rotational speed; specifically, the second control component 800 includes a variable resistor or a frequency converter.

[0057] In some embodiments, the stator shaft 300 is provided with a water channel 310 arranged in a spiral shape along the axial direction, the water channel 310 is arranged opposite to the inner stator 700, the water channel 310 is used for the cooling liquid to flow through, one end of the water channel 310 along the axial direction is communicated with a water inlet pipe 320, and the other end of the water channel 310 along the axial direction is communicated with a water outlet pipe 330. By arranging the water channel 310 for the cooling liquid to flow through in the stator shaft 300, the specific heat capacity of the cooling liquid is large, and the inner stator 700 is directly in contact with the part of the outer peripheral surface of the stator shaft 300 provided with the water channel 310, so that the cooling liquid flowing through the water channel 310 directly takes away the heat of the inner stator 700, so that the heat dissipation effect is more prominent; at the same time, the water inlet pipe 320 and the water outlet pipe 330 are respectively communicated with the two ends of the water channel 310 along the axial direction, so that the cooling liquid flowing from the water inlet pipe 320 can flow through the entire water channel 310 arranged in a spiral shape and then flow out through the water outlet pipe 330, so as to ensure that the cooling liquid maintains a static circulation state when flowing through the entire water channel 310 on the basis of reducing the flow resistance of the cooling liquid flowing through the water channel 310, and improve the heat dissipation and cooling effect of the inner stator 700. In specific applications, the cooling liquid can be water cooling liquid.

[0058] As shown in Figure 4 and Figure 6 specifically, one end of the water channel 310 communicated with the water inlet pipe 320 is provided as a liquid inlet end, and the other end of the water channel 310 communicated with the water outlet pipe 330 is provided as a liquid outlet end; the stator shaft 300 is provided with a water inlet interface 344 and a water outlet interface 345 at one end along the axial direction, the water inlet interface 344 and the water outlet interface 345 are arranged opposite to each other along the radial direction of the stator shaft 300, the water inlet interface 344 is communicated with the liquid inlet end of the water channel 310 through a first channel 346 in an L shape, and the water inlet interface 344 is used to connect the water inlet pipe 320; the water outlet interface 345 is communicated with the liquid outlet end of the water channel 310 through a second channel 347 in an L shape, and the water outlet interface 345 is used to connect the water outlet pipe 330; by arranging the water inlet interface 344 and the water outlet interface 345 on the same side of the stator shaft 300 along the axial direction, the water inlet pipe 320 and the water outlet pipe 330 can be arranged on the same side of the stator shaft 300 along the axial direction, so that the water inlet pipe 320 and the water outlet pipe 330 can be placed together in the vacuum pipeline for heat insulation treatment, thereby reducing the heat leakage to a certain extent and facilitating the rapid cooling of the inner stator 700.

[0059] Specifically, the stator shaft 300 includes a first part 340 and a second part 350, the outer peripheral surface of the first part 340 is provided with a water flow groove in a spiral shape along the axial direction, and the first part 340 is fitted into the second part 350 in an interference fit; the water flow groove and the inner peripheral surface of the second part 350 surround the water channel 310. By dividing the stator shaft 300 into the first part 340 and the second part 350 and combining them into a whole through interference fit, the water channel 310 can be machined in the stator shaft 300.

[0060] It should be noted that because the cooling liquid keeps a state of static circulation flowing through the entire water channel 310, the impact force applied to the inner wall of the water channel during the circulation of the cooling liquid is almost negligible, so that the axial displacement between the interference fit first part 340 and the second part 350 will not occur.

[0061] Specifically, the connection between the first part 340 and the second part 350 at both ends is sealed by welding to ensure the sealing of the water channel 310.

[0062] As shown in Figure 4 and Figure 6 Specifically, the axial dimension of the water channel 310 is greater than the axial dimension of the inner stator core 710, so that the cooling liquid circulating through the water channel 310 can basically exchange heat with each position of the inner stator core 710 along the axial direction, and the heat of the inner stator core 710 can be fully removed, which is beneficial to improve the heat dissipation and cooling effect of the inner stator 700.

[0063] As shown in Figure 5 and Figure 6 Specifically, the second control assembly 800 is arranged on an outer side wall of the stator along the axial direction, and the stator shaft 300 extends to the outside of the stator along the axial direction, and the inner wall of the stator shaft 300 is provided with a first threading hole 341, and the outer wall of the stator shaft 300 is provided with a second threading hole 342 along the radial direction of the stator shaft 300, and the second threading hole 342 is in communication with the first threading hole 341; the second control assembly 800 is electrically connected to the inner stator winding 720 through the first lead wire 810, and the first lead wire 810 passes through the first threading hole 341 and the second threading hole 342 in sequence. The first lead wire 810 is hidden and embedded through the first threading hole 341 and the second threading hole 342, which is beneficial to reduce the probability of being damaged or broken by the outside. As shown in Figure 3 and Figure 4 In another alternative scheme of the embodiment, the second control assembly 800 is arranged on an outer side wall of the stator along the axial direction, and the second control assembly 800 is electrically connected to the inner stator winding 720 through the first lead wire 810; the side wall of the stator is provided with a third threading hole 120 along the axial direction corresponding to the position of the second control assembly 800, and the third threading hole 120 is used for the first lead wire 810 to pass through.

[0064] Specifically, the motor shaft 200 extends to the outside of the stator along the axial direction to form an output end 220.

[0065] As shown in Figure 3 and Figure 4As shown, in some embodiments, the stator shaft 300 is formed with an inner hole 343 along the axial direction, the motor shaft 200 is coaxially fitted in the inner hole 343, and the motor shaft 200 extends out of the inner hole 343 at both axial ends and is rotatably connected to the side walls of the base 100 through the first bearing 210; the shell 400 includes a connecting plate 410 coaxially connected to the outer surface of the motor shaft 200, and the connecting plate 410 protrudes an installation cylinder 420 at the end surface opposite to the inner stator 700 along the axial direction, and the outer rotor core 510 is arranged on the inner wall of the installation cylinder 420. First, the motor shaft 200 is rotatably supported at both axial ends through the side walls of the base 100 along the axial direction, thereby improving the stability of the rotation of the motor shaft 200; and the installation cylinder 420 and the connecting plate 410 are used to form the shell 400 which is open at one end along the axial direction, so that the outer rotor 500 arranged on the inner wall of the shell 400 is more convenient for heat dissipation.

[0066] As shown, Figure 3 Specifically, the outer surface of the installation cylinder 420 is provided with a plurality of flow guide grooves 421 spaced apart along the axial direction, the flow guide grooves 421 are arranged opposite to the outer rotor core 510, and the flow guide grooves 421 are arranged along the circumference of the installation cylinder 420. During the rotation of the installation cylinder 420 with the motor shaft 200, the air flows in the flow guide grooves 421 to take away the heat of the outer rotor core 510 in direct contact with the inner wall of the installation cylinder 420.

[0067] In order to further improve the heat dissipation efficiency of the motor of the present embodiment, specifically, the inner wall and the outer wall of the base 100 are both provided with heat dissipation ribs.

[0068] As shown, Figure 3 Specifically, the outer rotor winding 520 is electrically connected to the first control assembly 600 through a slip ring carbon brush assembly, the slip ring carbon brush assembly includes a slip ring 910 and a carbon brush 920, the slip ring 910 is fixedly sleeved on the outer surface of the motor shaft 200 and located on the side of the connecting plate 410 opposite to the installation cylinder 420, and the carbon brush 920 is connected to the inner wall of the base 100 through a brush holder 930. By coaxially fixing the slip ring 910 to the motor shaft 200, the slip ring 910 rotates synchronously with the outer rotor 500 without differential speed, so as to ensure that the wire electrically connecting the slip ring 910 and the outer rotor winding 520 is not easily broken; and the slip ring carbon brush assembly is arranged on the side of the connecting plate 410 opposite to the installation cylinder 420, so that the slip ring carbon brush assembly, the outer rotor 500 and the inner stator 700 are arranged in different spaces along the axial direction, which is conducive to more efficient heat dissipation and improves the service life of the components.

[0069] Specifically, the end cover 110 is detachably connected to one end of the machine base 100 relatively close to the slip ring carbon brush assembly in the axial direction by a bolt. The end cover 110 protects the elements such as the slip ring 910 and the carbon brush 920 located in the machine base 100, and can be removed when the slip ring 910 and the carbon brush 920 need to be repaired and replaced.

[0070] Specifically, the first control assembly 600 is arranged at the outer top end of the machine base 100, the carbon brush 920 is electrically connected to the first control assembly 600 through the second lead wire 610, and the top end of the machine base 100 is penetrated by the first hole 130 corresponding to the position of the first control assembly 600. The first hole 130 is used for the second lead wire 610 to pass through, which simplifies the assembly difficulty.

[0071] As shown in Figure 5 and Figure 6 In some embodiments, the machine shell 400 includes a cylinder 430, the outer rotor core 510 is arranged on the inner wall of the cylinder 430, the first connecting flange 440 and the second connecting flange 450 are arranged at the two ends of the cylinder 430 in the axial direction respectively, the first connecting flange 440 is rotatably connected to the stator shaft 300 through the second bearing 441, the second connecting flange 450 is coaxially provided with a mounting disc 451 on the end face relatively close to the first connecting flange 440, the mounting disc 451 is rotatably connected to the end of the stator shaft 300 through the third bearing 452, and the motor shaft 200 is coaxially connected to the end face of the second connecting flange 450 relatively far away from the first connecting flange 440. By rotatably connecting the first connecting flange 440 and the second connecting flange 450 of the machine shell 400 to the stator shaft 300 through the second bearing 441 and the third bearing 452 respectively, and then coaxially and fixedly connecting the motor shaft 200 to the machine shell 400, the stator shaft 300 and the motor shaft 200 are arranged in different spaces in the axial direction, so that the structure of the motor of the embodiment is more compact and the assembly is more convenient.

[0072] As shown in Figure 5As shown, specifically, the outer rotor winding 520 is electrically connected to the first control assembly 600 through a slip ring carbon brush assembly, the slip ring carbon brush assembly comprises a slip ring 910 and a carbon brush 920, the slip ring 910 is fixedly sleeved on the outer circumferential surface of the motor shaft 200, and the carbon brush 920 is connected to the inner wall of the machine base 100 through a brush holder 930; the end cover 110 is detachably connected to one end of the machine base 100 along the axial direction and relative to the slip ring carbon brush assembly through a bolt. In the process of assembling, the end cover 110 can be first removed, the stator shaft 300 is fixed in the machine base 100, then the slip ring carbon brush assembly is assembled with the motor shaft 200, then the machine shell 400 is rotatably assembled on the stator shaft 300, and finally the end cover 110 is assembled to complete the motor assembly of the embodiment, and the assembly is more simplified.

[0073] Although the embodiments of the utility model are described in combination with the drawings, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations all fall within the scope defined by the appended utility model.

Claims

1. A multi-turnable outer rotor motor, characterized by, The utility model provides a kind of motor, including: Base (100); Motor shaft (200), rotationally connected in the base (100); Stator shaft (300), fixedly connected in the base (100); Machine shell (400), coaxially fixedly connected with the motor shaft (200); Outer rotor (500), including outer rotor core (510) and outer rotor winding (520), the inner wall of the outer rotor core (510) is fixedly connected to the machine shell (400), and the inner side of the outer rotor core (510) is spaced apart and is provided with a plurality of first open slots (511) along the circumference of the outer rotor core (510), and the first open slot (511) is provided with a plurality of first open slots (511) along the radial direction of the outer rotor core (510) relative to the end close to the axis of the outer rotor core (510), and the first open slot (511) is used to set the coil of the outer rotor winding (520); First control assembly (600), electrically connected with the outer rotor winding (520), the first control assembly (600) is used to adjust the current or voltage of the outer rotor (500); Inner stator (700), including inner stator core (710) and inner stator winding (720), the outer circumferential surface of the stator shaft (300) is fixedly sleeved with the inner stator core (710), and is arranged opposite to the outer rotor (500), and the outer side of the inner stator core (710) is spaced apart and is provided with a plurality of second open slots (711) along the circumference of the inner stator core (710), and the second open slot (711) is provided with a plurality of second open slots (711) along the radial direction of the inner stator core (710) relative to the end away from the axis of the inner stator core (710), and the second open slot (711) is used to set the coil of the inner stator winding (720);The second control assembly (800) is electrically connected with the inner stator winding (720), and the second control assembly (800) is used to adjust the current or voltage of the inner stator (700);The inner stator (700) is used to generate rotating magnetic field by energization.

2. A multi-turn wound external rotor motor according to claim 1, characterised in that, The part of the outer rotor winding (520) extending to the outside of the outer rotor core (510) along the axial direction is provided as a mounting end portion (521), and the mounting end portion (521) is bonded to the inner wall of the machine shell (400) by epoxy glue (522) relative to the end face close to the inner wall of the machine shell (400).

3. A multi-turn wound external rotor motor according to claim 1 or 2, characterised in that, The water channel (310) is arranged in a spiral shape along the axial direction in the stator shaft (300), and the water channel (310) is arranged opposite to the inner stator (700), and the water channel (310) is used for cooling liquid to flow through, and one end of the water channel (310) along the axial direction is communicated with the water inlet pipe (320), and the other end of the water channel (310) along the axial direction is communicated with the water outlet pipe (330).

4. A multi-turn wound external rotor motor according to claim 3, wherein The stator shaft (300) includes a first part (340) and a second part (350), and a water flow groove is formed in the outer circumferential surface of the first part (340) in a spiral shape along the axial direction, and the first part (340) is interference-fitted in the second part (350); the water flow groove and the inner circumferential surface of the second part (350) surround the water channel (310).

5. A multi-turn wound external rotor motor as claimed in claim 1 or 2, wherein, The second control assembly (800) is arranged on an outer side wall of the frame (100) along the axial direction, one end of the stator shaft (300) relatively close to the second control assembly (800) extends out of the frame (100), and a first threading hole (341) is arranged in the middle part of the stator shaft (300) along the axial direction, a second threading hole (342) is arranged on the outer wall of the stator shaft (300) along the radial direction of the stator shaft (300), and the second threading hole (342) is in communication with the first threading hole (341); the second control assembly (800) is electrically connected to the inner stator winding (720) through a first lead wire (810), and the first lead wire (810) passes through the first threading hole (341) and the second threading hole (342) in sequence.

6. A multi-turn wound external rotor motor as claimed in claim 3, wherein, The stator shaft (300) is coaxially penetrated along the axial direction to form an inner hole (343), the motor shaft (200) is coaxially gap-fitted in the inner hole (343), and the motor shaft (200) extends out of the inner hole (343) at both ends along the axial direction and is rotatably connected to the side wall of the frame (100) through a first bearing (210); the machine shell (400) comprises a connecting plate (410) coaxially connected to the outer peripheral surface of the motor shaft (200), and the connecting plate (410) is provided with a mounting cylinder (420) protruding from the end face relatively close to the inner stator (700) along the axial direction, and the outer rotor core (510) is arranged on the inner wall of the mounting cylinder (420).

7. A multi-turn wound external rotor motor as claimed in claim 6, characterised in that, The outer rotor winding (520) is electrically connected to the first control assembly (600) through a carbon brush assembly, the carbon brush assembly comprises a carbon brush (920) and a carbon brush (920), the carbon brush (920) is fixedly sleeved on the outer peripheral surface of the motor shaft (200), and is located on the side of the connecting plate (410) relatively far away from the mounting cylinder (420), and the carbon brush (920) is connected to the inner wall of the frame (100) through a brush holder (930).

8. A multi-turn wound external rotor motor as claimed in claim 7, characterised in that, The frame (100) is detachably connected to an end cover (110) at one end relatively close to the carbon brush assembly along the axial direction through bolts.

9. A multi-turn wound external rotor motor as claimed in claim 3, wherein, The machine shell (400) comprises a cylinder (430), the outer rotor core (510) is arranged on the inner wall of the cylinder (430), the cylinder (430) is provided with a first connecting flange (440) and a second connecting flange (450) at both ends along the axial direction, the first connecting flange (440) is rotatably connected to the stator shaft (300) through a second bearing (441); the second connecting flange (450) is coaxially provided with a mounting disc (451) protruding from the end face relatively close to the first connecting flange (440), and the mounting disc (451) is rotatably connected to the end of the stator shaft (300) through a third bearing (452); and the motor shaft (200) is coaxially connected to the end face of the second connecting flange (450) relatively far away from the first connecting flange (440).

10. A multi-turn wound external rotor motor as claimed in claim 9, wherein, The outer rotor winding (520) is electrically connected with the first control assembly (600) through a slip ring carbon brush assembly, the slip ring carbon brush assembly comprises a slip ring (910) and a carbon brush (920), the slip ring (910) is fixedly sleeved on the outer circumferential surface of the motor shaft (200), and the carbon brush (920) is connected to the inner wall of the machine base (100) through a brush holder (930); one end of the machine base (100) relatively close to the slip ring carbon brush assembly is detachably connected with an end cover (110) through a bolt in the axial direction.

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