Novel double-permanent-magnet speed regulation motor with cantilever structure

Abstract

The invention relates to the technical field of motors, and discloses a novel cantilever structure double-permanent-magnet speed regulation motor which comprises a machine shell and an energy feedback assembly, a driving shaft and a motor shaft are rotationally connected in the machine shell, the motor shaft is coaxially in clearance fit with an inner hole of the driving shaft, and a connecting frame is coaxially fixed to the opposite front end of the driving shaft; the driving shaft is fixedly sleeved with a first permanent magnet rotor, a driving winding is fixedly connected to the position, opposite to the first permanent magnet rotor, of the inner wall of the machine shell, the driving winding is electrically connected with a control assembly, and the control assembly is used for adjusting the output rotating speed of the motor by controlling the magnitude of current in the driving winding. A second permanent magnet rotor is arranged in the connecting frame, a speed regulation winding is fixedly connected to the position, opposite to the second permanent magnet rotor, outside the motor shaft in a sleeving mode, and the energy feedback assembly is used for conducting rectification and inversion on induction current generated by the speed regulation winding and then feeding back the induction current to an external power source. The current generated by the carbon brush is smaller, the wear rate is lower, and the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a novel cantilever structure dual permanent magnet speed regulating motor. Background Art

[0002] Electric motors are major energy consumers in national life and industrial production. According to statistics, the power consumption of electric motors accounts for more than 60% of the total power generation. Therefore, improving the energy efficiency of motors is of great significance to the achievement of energy-saving goals and the high-quality development of social economy. Among them, motor speed regulation is recognized as a very effective way to save energy. There are mainly three ways of speed regulation: electromagnetic speed regulation, cascade speed regulation and variable frequency speed regulation. Each of the three methods has its own disadvantages: electromagnetic speed regulation has low speed regulation efficiency, large slip power loss, and large axial length; cascade speed regulation does not have low-voltage ride-through function; variable frequency speed regulation technology is complex, costly, has high environmental requirements, and is difficult to maintain and overhaul, so there is an urgent need for a high-efficiency, small and low-cost speed regulation motor.

[0003] The patent with announcement number "CN217282770U" discloses a speed regulating motor, which has high speed regulating efficiency, small size and low cost. However, since the collector ring carbon brush assembly is installed in the mounting housing and rotates with the mounting housing, the speed is relatively high, resulting in a high wear rate of the carbon brush. Summary of the invention

[0004] In view of this, the present invention provides a novel cantilever structure dual permanent magnet speed regulating motor to solve the problem of high wear rate of carbon brushes in existing speed regulating motors.

[0005] The present invention provides a novel cantilever structure dual permanent magnet speed regulating motor, comprising:

[0006] A housing, in which a drive shaft and a motor shaft are rotatably connected, the motor shaft is coaxially clearance-fitted in the inner hole of the drive shaft, the front end of the motor shaft in the axial direction extends to the outside of the drive shaft, and a connecting frame is coaxially fixed to the front end of the drive shaft in the axial direction;

[0007] The electric part includes a driving winding and a first permanent magnet rotor, wherein the first permanent magnet rotor is fixedly sleeved on the outer peripheral surface of the driving shaft, and the driving winding is fixedly connected to the inner wall of the housing and arranged opposite to the first permanent magnet rotor;

[0008] A control component, electrically connected to the drive winding, and configured to adjust the output speed of the motor by controlling the current in the drive winding;

[0009] The speed regulating power generation part includes a speed regulating winding and a second permanent magnet rotor, wherein the second permanent magnet rotor is fixedly connected to the inner wall of the connection frame, and the speed regulating winding is fixedly sleeved on the outer peripheral surface of the motor shaft and arranged opposite to the second permanent magnet rotor;

[0010] The energy feedback component is used to rectify and invert the induced current generated by the speed regulating winding and then feed it back to an external power supply; the energy feedback component includes a collector ring carbon brush component electrically connected to the speed regulating winding, and the collector ring carbon brush component is arranged on the motor shaft.

[0011] A novel cantilever structure dual permanent magnet speed regulating motor according to the present invention has at least the following beneficial effects:

[0012] By electrically connecting the drive winding with the control component, when the external power supply supplies AC power to the drive winding, the control component realizes speed regulation by controlling the current of the drive winding in the electric part, which has the advantages of high speed regulation efficiency in the existing structure; and by electrically connecting the speed regulation winding with the energy feedback component, the interaction between the speed regulation winding and the second permanent magnet rotor can make the induced current generated by the conductor of the speed regulation winding be fed back to the external power supply after rectification and inversion by the energy feedback component, which is more energy-saving; at the same time, the collector ring carbon brush assembly is arranged on the motor shaft. Compared with the existing structure in which the collector ring carbon brush assembly is arranged on the mounting shell, the rotation speed of the collector ring carbon brush assembly of the dual permanent magnet speed regulation motor is the rotation speed after speed regulation, and the rotation speed is lower, so that the current generated by the carbon brush is smaller and the wear rate is lower, which is conducive to extending the service life.

[0013] In an optional embodiment, the relatively rear end of the motor shaft in the axial direction extends outside the drive shaft, and the collector ring carbon brush assembly is arranged at the relatively rear end of the motor shaft in the axial direction.

[0014] In an optional embodiment, a first threading hole is provided in the relatively rear end along the axial direction of the motor shaft, and a second threading hole is provided on the outer wall of the motor shaft along the radial direction of the motor shaft, and the second threading hole is connected to the first threading hole; the speed regulating winding is electrically connected to the collector ring carbon brush assembly through a first lead wire, and the first lead wire passes through the second threading hole and the first threading hole in sequence.

[0015] In an optional implementation, a cooling fan is fixedly sleeved on the outer circumferential surface of the motor shaft, and the cooling fan is located between the drive shaft and the collector ring carbon brush assembly.

[0016] In an optional embodiment, the relatively rear end of the casing along the axial direction is connected to a box body through a support member, the support member has a cavity, and the cooling fan is located in the cavity; the relatively rear end of the motor shaft along the axial direction extends into the box body and is connected to the collector ring carbon brush assembly.

[0017] In an optional embodiment, one end of the box body axially relatively far away from the support member is detachably connected to a first end cover.

[0018] In an optional embodiment, two connecting flanges are arranged in the casing at intervals in the axial direction, and the two ends of the drive shaft in the axial direction are respectively connected to the two connecting flanges through first bearings.

[0019] In an optional embodiment, the housing is detachably connected to second end covers at both ends along the axial direction, and the motor shaft is connected to the second end covers at both ends along the axial direction through second bearings.

[0020] In an optional embodiment, the energy feedback assembly also includes a feedback junction box electrically connected to the collector ring carbon brush assembly, the feedback junction box is arranged on the outer surface of the housing, and is used to rectify and invert the current output by the collector ring carbon brush assembly and feed it back to an external power supply.

[0021] In an optional implementation, the speed regulating winding is connected to the motor shaft via a carrier; and weight-reducing annular grooves are provided on both sides of the carrier along the axial direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic structural diagram of a novel cantilever structure dual permanent magnet speed regulating motor according to an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of a local structure with an electric part in an embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the local structure with a speed regulating power generation part and an energy feedback component in an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 100 - housing, 110 - connecting flange, 120 - second end cover, 130 - lifting ring, 140 - first cavity, 150 - second cavity, 160 - fourth hole, 170 - limiting part;

[0028] 210 - driving shaft, 211 - first bearing, 220 - connecting frame, 221 - connecting plate, 222 - mounting cylinder, 230 - driving winding, 231 - second lead wire, 240 - first permanent magnet rotor, 250 - driving terminal box, 251 - third hole;

[0029] 310-motor shaft, 311-first threading hole, 312-second threading hole, 313-second bearing, 314-output end, 320-speed regulating winding, 321-first lead wire, 330-second permanent magnet rotor, 340-cooling fan, 350-carrier, 351-weight reduction ring groove;

[0030] 400-control components;

[0031] 500-external power supply;

[0032] 610-collector ring carbon brush assembly, 620-feedback junction box, 621-second hole, 630-third lead wire;

[0033] 700-support member, 710-cavity;

[0034] 800 - box body, 810 - first end cover, 820 - first hole. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0036] In the description of this embodiment, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this embodiment 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 limiting this embodiment. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] In the description of this embodiment, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0038] Combine the following Figures 1 to 3 , describing an embodiment of the present invention.

[0039] According to an embodiment of the present invention, a novel cantilever structure dual permanent magnet speed regulating motor is provided, comprising a housing 100, an electric part, a speed regulating power generation part and an energy feedback component, wherein a drive shaft 210 and a motor shaft 310 are rotatably connected in the housing 100, the motor shaft 310 is coaxially fitted in the inner hole of the drive shaft 210, the front end of the motor shaft 310 in the axial direction extends to the outside of the drive shaft 210, and a connecting frame 220 is coaxially fixed to the front end of the drive shaft 210 in the axial direction; the electric part comprises a drive winding 230 and a first permanent magnet rotor 240, the first permanent magnet rotor 240 is fixedly sleeved on the outer peripheral surface of the drive shaft 210, the drive winding 230 is fixedly connected to the inner wall of the housing 100 and arranged opposite to the first permanent magnet rotor 240; The drive winding 230 is electrically connected to a control component 400, and the control component 400 is used to adjust the output speed of the motor by controlling the current in the drive winding 230; the speed regulating power generation part includes a speed regulating winding 320 and a second permanent magnet rotor 330, and the second permanent magnet rotor 330 is fixedly connected to the inner wall of the connection frame 220, and the speed regulating winding 320 is fixedly sleeved on the outer peripheral surface of the motor shaft 310 and arranged opposite to the second permanent magnet rotor 330; the energy feedback component is used to rectify and invert the induced current generated by the speed regulating winding 320 and then feed it back to the external power supply 500; the energy feedback component includes a collector ring carbon brush assembly 610 electrically connected to the speed regulating winding 320, and the collector ring carbon brush assembly 610 is arranged on the motor shaft 310.

[0040] The output torque and power generation process of the dual permanent magnet speed regulating motor of this embodiment are as follows: the external power supply 500 provides AC power to the driving winding 230 of the electric part through the control component 400. The rotating magnetic field generated in the driving winding 230 interacts with the permanent magnetic field of the first permanent magnet rotor 240 to generate torque, so that the first permanent magnet rotor 240 rotates synchronously with the rotating magnetic field of the driving winding 230, so that the driving shaft 210, the connecting frame 220 and the second permanent magnet rotor 330 rotate with the first permanent magnet rotor 240. The second permanent magnet rotor 330 that rotates synchronously with the driving shaft 210 will generate a rotating magnetic field. On the one hand, the conductor of the speed regulating winding 320 cuts the rotating magnetic field generated by the second permanent magnet rotor 330 to form an induced current, which is rectified and inverted by the energy feedback component and then fed back to the external power supply 500, which is more energy-efficient. On the other hand, On the one hand, because the speed regulating winding 320 is connected to the housing 100 as it rotates with the motor shaft 310, and an induced magnetic field is generated while the speed regulating winding 320 generates an induced current, the induced magnetic field of the speed regulating winding 320 interacts with the rotating magnetic field of the second permanent magnet rotor 330 to transmit torque, thereby causing the speed regulating winding 320 to rotate, thereby driving the motor shaft 310 to rotate and output torque; and the rotation speed of the motor shaft 310 is less than the rotation speed of the drive shaft 210. Compared with the existing structure in which the collector ring carbon brush assembly 610 is arranged in the mounting shell (that is, the rotation speed of the collector ring carbon brush assembly 610 is the same as the rotation speed of the drive shaft 210), the rotation speed of the collector ring carbon brush assembly 610 of the dual permanent magnet speed regulating motor of this embodiment is the rotation speed of the motor shaft 310. The lower the rotation speed, the smaller the current generated by the carbon brush, and the lower the wear rate, which is conducive to extending the service life.

[0041] The speed regulation process of the dual permanent magnet speed regulation motor of this embodiment is as follows: the control component 400 can adjust the size of the induced magnetic field generated by the driving winding 230 due to the current by adjusting the size of the current transmitted to the driving winding 230 by the external power supply 500, thereby adjusting the size of the torque of the induced magnetic field generated by the driving winding 230 on the first permanent magnet rotor 240. The first permanent magnet rotor 240 and the second permanent magnet rotor 330 rotate as a whole, so the speed of the second permanent magnet rotor 330 will be adjusted, thereby adjusting the speed of the speed regulation winding 320, and finally realizing the adjustment of the motor output speed (i.e., the rotation of the motor shaft 310).

[0042] The control component 400 adjusts the motor output speed by adjusting the current delivered from the external power supply 500 to the drive winding 230 according to the actual needs of the load; specifically, the control component 400 includes a variable resistor, which adjusts the motor speed by changing the resistance value.

[0043] It can be understood that the housing 100, the drive shaft 210 and the motor shaft 310 are coaxially arranged, and the axial directions of the three are in the same direction; the axial direction mentioned in the text refers to the axial direction of the motor shaft 310. For the convenience of description, this embodiment is based on Figure 1The axial direction shown in FIG. 3 is used as an illustration of the axial direction of the motor shaft 310 , but should not be understood as a clear limitation on the axial direction of the motor shaft 310 .

[0044] Specifically, a lifting ring 130 is provided on the outer surface of the housing 100 to facilitate lifting and transportation with the help of lifting equipment.

[0045] like Figure 1 and Figure 3 As shown, specifically, the connecting frame 220 includes a connecting plate 221 and a mounting tube 222, wherein the connecting plate 221 is coaxially connected to the relative front end of the driving shaft 210 by bolts, and the mounting tube 222 is coaxially connected to an end of the connecting plate 221 relatively away from the driving shaft 210 by bolts; the second permanent magnet rotor 330 is connected to the inner wall of the mounting tube 222.

[0046] like Figure 1 and Figure 3 As shown, in some embodiments, the rear end of the motor shaft 310 along the axial direction extends to the outside of the drive shaft 210, and the collector ring carbon brush assembly 610 is arranged at the rear end of the motor shaft 310 along the axial direction. By arranging the electric part, the speed regulating power generation part and the energy feedback assembly at intervals along the axial direction, it is conducive to more efficient heat dissipation and improves the service life of parts.

[0047] like Figure 3 As shown, specifically, the motor shaft 310 is provided with a first threading hole 311 in the relatively rear end in the axial direction, and the outer wall of the motor shaft 310 is provided with a second threading hole 312 in the radial direction of the motor shaft 310, and the second threading hole 312 is connected with the first threading hole 311; the speed regulating winding 320 is electrically connected to the collector ring carbon brush assembly 610 through the first lead wire 321, and the first lead wire 321 sequentially passes through the second threading hole 312 and the first threading hole 311. The first threading hole 311 and the second threading hole 312 are used for the first lead wire 321 to be hidden and embedded, which is conducive to reducing the probability of the first lead wire 321 being pulled off under the action of the centrifugal force generated during the rotation of the motor shaft 310.

[0048] Specifically, a cooling fan 340 is fixedly sleeved on the outer circumference of the motor shaft 310, and the cooling fan 340 is located between the drive shaft 210 and the collector ring carbon brush assembly 610. In the process of the motor shaft 310 in the dual permanent magnet speed regulating motor of this embodiment rotating to output torque, the cooling fan 340 rotates synchronously with the motor shaft 310, so that the outside air enters from the relatively rear end of the housing 100 along the axial direction and flows through the inside of the housing 100 and flows out from the relatively front end of the housing 100, taking away the heat inside the housing 100, which is beneficial to improve the heat dissipation efficiency of the dual permanent magnet speed regulating motor of this embodiment, thereby improving the service life of the internal parts of the housing 100.

[0049] In order to further improve the heat dissipation efficiency of the dual permanent magnet speed regulating motor of this embodiment, specifically, the inner wall and the outer wall of the housing 100 are both provided with heat dissipation ribs.

[0050] Specifically, the relatively rear end of the casing 100 along the axial direction is connected to the box body 800 through the support member 700, and the support member 700 is provided with a cavity 710, and the cooling fan 340 is located in the cavity 710; the relatively rear end of the motor shaft 310 along the axial direction extends into the box body 800 and is connected to the collector ring carbon brush assembly 610. By arranging the electric part and the speed regulating power generation part in the casing 100 at intervals along the axial direction, and arranging the collector ring carbon brush assembly 610 separately in the box body 800, and arranging the cooling fan 340 in the cavity 710 of the support member 700; on the one hand, the installation spaces of the electric part, the speed regulating power generation part, the cooling fan 340 and the collector ring carbon brush assembly 610 are better independent of each other along the axial direction, so that the heat dissipated by each component is accumulated in the corresponding installation space; on the other hand, in the process of the cooling fan 340 rotating synchronously with the motor shaft 310, the outside air enters from the relatively rear end of the box body 800 along the axial direction, flows through the cavity 710 of the support member 700, and then enters the interior of the casing 100 and flows out from the relatively front end of the casing 100, the flow path is longer, which is more conducive to taking out the internal heat of the box body 800, the heat in the cavity 710 and the internal heat of the casing 100, and the heat dissipation efficiency is higher.

[0051] Specifically, the collector ring of the collector ring carbon brush assembly 610 is fixedly sleeved on the relatively rear end of the motor shaft 310 along the axial direction, and the carbon brush of the collector ring carbon brush assembly 610 is fixed on the inner side of the box body 800 .

[0052] Specifically, one end of the box body 800 which is axially relatively far away from the support member 700 is detachably connected to a first end cover 810 via bolts. The first end cover 810 protects components such as collector rings and carbon brushes located inside the box body 800, and the first end cover 810 can be removed when the collector rings and carbon brushes need to be repaired and replaced.

[0053] like Figure 1 and Figure 2 As shown, specifically, two connecting flanges 110 are arranged in the housing 100 at intervals in the axial direction, and the two ends of the drive shaft 210 in the axial direction are respectively connected to the two connecting flanges 110 through first bearings 211. On the one hand, the two connecting flanges 110 are used to support the two ends of the drive shaft 210 in the axial direction, thereby improving the stability of the rotation of the drive shaft 210; on the other hand, the two connecting flanges 110 and the inner wall of the housing 100 form a first cavity 140 for installing the electric part, which is conducive to keeping the heat generated by the electric part in the first cavity 140 without substantially affecting the speed regulating power generation part and the energy feedback component.

[0054] like Figure 2 As shown, specifically, a limit portion 170 is protruded from the inner wall of the casing 100 in a direction close to the axis of the casing 100, and the connecting flange 110 is detachably connected to the limit portion 170 by bolts; so that after the electric part is installed inside the casing 100, the connecting flange 110 is installed by bolts, and the drive shaft 210 is rotatably installed on the two connecting flanges 110, and then installed in the casing 100. Compared with directly installing the drive shaft 210 on the casing 100, the structure of the casing 100 is simplified and the assembly process is simpler.

[0055] like Figure 1 and Figure 3 As shown, specifically, the two ends of the housing 100 in the axial direction are detachably connected with the second end covers 120 by bolts, and the two ends of the motor shaft 310 in the axial direction are respectively connected to the second end covers 120 by second bearings 313. On the one hand, the two second end covers 120 are used to support the two ends of the motor shaft 310 in the axial direction, thereby improving the stability of the rotation of the motor shaft 310; on the other hand, the second end covers 120 located at the relatively front ends in the axial direction, the connecting flange 110 located at the relatively front ends in the axial direction, and the inner wall of the housing 100 form a second cavity 150 for installing the connecting frame 220 and the speed regulating power generation part, which is conducive to making the heat generated by the speed regulating power generation part stay in the second cavity 150 without basically affecting the electric part and the energy feedback component. At the same time, the second end cover 120 is detachably connected to the end of the casing 100 by bolts, which facilitates the motor shaft 310 to be rotatably installed on the two second end covers 120 and then installed on the casing 100. Compared with directly rotatably installing the motor shaft 310 on the casing 100, the structure of the casing 100 is simplified and the assembly process is simpler.

[0056] Specifically, the front end of the motor shaft 310 along the axial direction penetrates the corresponding second end cover 120 to form an output end 314 .

[0057] like Figure 3 As shown, specifically, one end of the box body 800 which is relatively close to the support member 700 along the axial direction is also detachably connected to the first end cover 810 by bolts; the two ends of the support member 700 along the axial direction are detachably connected to the adjacent first end cover 810 and the second end cover 120 by bolts, thereby simplifying the structure of this embodiment so as to assemble the dual permanent magnet speed regulation motor of this embodiment.

[0058] It is understandable that through holes are formed axially through the first end cover 810, the second end cover 120 and the connecting flange 110 so that the outside air can flow through the interior of the box body 800, the cavity 710 and the interior of the casing 100 under the drive of the cooling fan 340 and bring the heat out to the outside for heat dissipation.

[0059] In some embodiments, the energy feedback component also includes a feedback junction box 620 electrically connected to the collector ring carbon brush assembly 610, and the feedback junction box 620 is arranged on the outer surface of the housing 100, and is used to rectify and invert the current output by the collector ring carbon brush assembly 610 and feed it back to the external power supply 500; by integrating the rectification and inversion functions in the feedback junction box 620, the structure is more compact.

[0060] Specifically, the feedback junction box 620 includes a rectifier and an inverter, and is suitable for connecting to an external power supply 500; the conductor of the speed regulating winding 320 cuts the rotating magnetic field generated by the second permanent magnet rotor 330 to form an induced current that is converted into electrical energy through the collector ring carbon brush assembly 610, and is fed back to the external power supply 500 through the rectifier and inverter, which is more energy-efficient.

[0061] The collector ring carbon brush assembly 610 is electrically connected to the feedback junction box 620 through the third lead wire 630. The feedback junction box 620 is arranged on the outer surface of the box body 800. A first hole 820 is penetrated by the end surface of the box body 800 relatively close to the feedback junction box 620. A second hole 621 is penetrated by the position of the feedback junction box 620 relatively close to the end surface of the box body 800 corresponding to the first hole 820. The first hole 820 and the second hole 621 are used for the third lead wire 630 to pass through, thereby simplifying the assembly difficulty.

[0062] like Figure 3 As shown, in some embodiments, the speed regulating winding 320 is connected to the motor shaft 310 through a carrier 350; both sides of the carrier 350 along the axial direction are provided with weight-reducing annular grooves 351. Through the transition connection of the carrier 350, the air gap between the speed regulating winding 320 and the second permanent magnet rotor 330 along the radial direction of the motor shaft 310 is smaller, the induced electromotive force and torque generated are larger, and more energy-saving is achieved; and by providing the weight-reducing annular grooves 351 on the carrier 350, the overall weight of the components sleeved on the motor shaft 310 can be reduced, reducing energy consumption.

[0063] In some embodiments, the drive winding 230 is electrically connected to the control component 400 via a second lead wire 231; a drive terminal box 250 is provided on the outer surface of the housing 100, and one end of the second lead wire 231 relatively away from the drive winding 230 is connected to the drive terminal box 250 with the output terminal 314 of the control component 400, so as to facilitate the integration of the connection between the second lead wire 231 and the output terminal 314 of the control component 400 in the drive terminal box 250.

[0064] Specifically, a third hole 251 is provided through the end surface of the driving terminal box 250 relatively close to the casing 100, and a fourth hole 160 is provided through the end surface of the casing 100 relatively close to the driving terminal box 250 at a position corresponding to the third hole 251. The third hole 251 and the fourth hole 160 are used for the second lead wire 231 to pass through, thereby simplifying the assembly difficulty.

[0065] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended invention.

Claims

1. A new cantilever structure dual permanent magnet speed regulating motor, characterized in that: include: A housing (100) is rotatably connected with a drive shaft (210) and a motor shaft (310) therein; the motor shaft (310) is coaxially fitted in an inner hole of the drive shaft (210) with clearance; the front end of the motor shaft (310) along the axial direction extends to the outside of the drive shaft (210); and a connecting frame (220) is coaxially fixed to the front end of the drive shaft (210) along the axial direction; The electric part comprises a driving winding (230) and a first permanent magnet rotor (240), wherein the first permanent magnet rotor (240) is fixedly sleeved on the outer peripheral surface of the driving shaft (210), and the driving winding (230) is fixedly connected to the inner wall of the housing (100) and arranged opposite to the first permanent magnet rotor (240); A control component (400) is electrically connected to the drive winding (230), and the control component (400) is used to adjust the output speed of the motor by controlling the current in the drive winding (230); The speed regulating power generation part comprises a speed regulating winding (320) and a second permanent magnet rotor (330), wherein the second permanent magnet rotor (330) is fixedly connected to the inner wall of the connection frame (220), and the speed regulating winding (320) is fixedly sleeved on the outer peripheral surface of the motor shaft (310) and arranged opposite to the second permanent magnet rotor (330); An energy feedback component is used for rectifying and inverting the induced current generated by the speed regulating winding (320) and feeding it back to an external power source (500); the energy feedback component comprises a collector ring carbon brush component (610) electrically connected to the speed regulating winding (320), and the collector ring carbon brush component (610) is arranged on the motor shaft (310).

2. According to claim 1, a novel cantilever structure dual permanent magnet speed regulating motor is characterized in that: The relatively rear end of the motor shaft (310) along the axial direction extends outside the drive shaft (210), and the collector ring carbon brush assembly (610) is arranged at the relatively rear end of the motor shaft (310) along the axial direction.

3. According to claim 2, a novel cantilever structure dual permanent magnet speed regulating motor is characterized in that: A first threading hole (311) is provided inside the relatively rear end of the motor shaft (310) in the axial direction, and a second threading hole (312) is provided on the outer wall of the motor shaft (310) in the radial direction of the motor shaft (310), and the second threading hole (312) is connected to the first threading hole (311); the speed regulating winding (320) is electrically connected to the collector ring carbon brush assembly (610) through a first lead wire (321), and the first lead wire (321) passes through the second threading hole (312) and the first threading hole (311) in sequence.

4. According to claim 2, a novel cantilever structure dual permanent magnet speed regulating motor is characterized in that: A cooling fan (340) is fixedly sleeved on the outer peripheral surface of the motor shaft (310), and the cooling fan (340) is located between the drive shaft (210) and the collector ring carbon brush assembly (610).

5. The novel cantilever structure dual permanent magnet speed regulating motor according to claim 4 is characterized in that: The housing (100) is connected to a box body (800) at a relatively rear end along the axial direction via a support member (700), and the support member (700) is provided with a cavity (710), and the cooling fan (340) is located in the cavity (710); the motor shaft (310) is extended to the box body (800) at a relatively rear end along the axial direction and is connected to the collector ring carbon brush assembly (610).

6. The novel cantilever structure dual permanent magnet speed regulating motor according to claim 5 is characterized in that: One end of the box body (800) that is relatively far away from the support member (700) in the axial direction is detachably connected to a first end cover (810).

7. A novel cantilever structure dual permanent magnet speed regulating motor according to claim 1 or 5, characterized in that: Two connecting flanges (110) are arranged in the casing (100) at intervals along the axial direction, and two ends of the driving shaft (210) along the axial direction are respectively connected to the two connecting flanges (110) through first bearings (211).

8. The novel cantilever structure dual permanent magnet speed regulating motor according to claim 7 is characterized in that: The housing (100) is detachably connected to second end covers (120) at both ends along the axial direction, and the motor shaft (310) is connected to the second end covers (120) at both ends along the axial direction via second bearings (313).

9. A novel cantilever structure dual permanent magnet speed regulating motor according to claim 1 or 4, characterized in that: The energy feedback component also includes a feedback junction box (620) electrically connected to the collector ring carbon brush assembly (610); the feedback junction box (620) is arranged on the outer surface of the housing (100) and is used to rectify and invert the current output by the collector ring carbon brush assembly (610) and feed it back to the external power supply (500).

10. The novel cantilever structure dual permanent magnet speed regulating motor according to claim 1 is characterized in that: The speed regulating winding (320) and the motor shaft (310) are connected via a carrier (350); and both sides of the carrier (350) along the axial direction are provided with weight-reducing annular grooves (351).

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