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

Abstract

The utility model relates to the technical field of motors, and discloses a novel cantilever structure double permanent magnet speed regulation motor, which comprises a casing and an energy feedback assembly, a driving shaft and a motor shaft are rotatably connected in the casing, the motor shaft is coaxially in clearance fit with an inner hole of the driving shaft, and a connecting frame is coaxially fixed at 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 utility model relates to motor technical field, concretely relates to a novel cantilever structure double permanent magnet speed regulation motor. BACKGROUND

[0002] Electric motor is the energy big house in national life and industrial production, according to statistics, electric motor power consumption accounts for more than 60% of total power generation. Therefore, improve the energy efficiency of motor is significant to the achievement of energy saving target and the high-quality development of social economy. Among them, motor speed regulation operation is recognized as a very effective energy-saving way, and speed regulation mainly has the following three ways: electromagnetic speed regulation, cascade speed regulation and variable frequency speed regulation. Three ways have the following shortcomings: low speed regulation efficiency, large slip power loss and large axial length of electromagnetic speed regulation;Cascade speed regulation does not have low voltage ride through function;Variable frequency speed regulation technology is complex, high cost, high environmental requirement, difficult maintenance, so it is urgent to need a kind of high efficiency, small size and low cost speed regulation motor.

[0003] The patent with publication number "CN217282770U" discloses a speed regulation motor, which has high speed regulation efficiency, small size and low cost, but the carbon brush assembly of the collector ring is installed on the installation shell and rotates with the installation shell, and the high rotating speed leads to high carbon brush wear rate. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a novel cantilever structure double permanent magnet speed regulation motor to solve the problem of high carbon brush wear rate of the existing speed regulation motor.

[0005] The utility model provides a novel cantilever structure double permanent magnet speed regulation motor, which comprises:

[0006] The shell is rotatably connected with a driving shaft and a motor shaft, the motor shaft is coaxially fitted in the inner hole of the driving shaft, the relative front end of the motor shaft along the axial direction extends to the outside of the driving shaft, and the relative front end of the driving shaft along the axial direction is coaxially fixed with a connecting frame.

[0007] The electric part comprises a driving winding and a first permanent magnet rotor, the first permanent magnet rotor is fixedly sleeved on the outer surface of the driving shaft, and the driving winding is fixedly connected to the inner wall of the shell and arranged opposite to the first permanent magnet rotor.

[0008] The control assembly is electrically connected with the driving winding, and the control assembly is used for adjusting the output rotating speed of the motor by controlling the current size in the driving winding.

[0009] The speed regulation power generation part comprises a speed regulation winding and a second permanent magnet rotor, the second permanent magnet rotor is fixedly connected to the inner wall of the connecting frame, and the speed regulation winding is fixedly sleeved on the outer surface of the motor shaft and arranged opposite to the second permanent magnet rotor.

[0010] An energy feedback assembly for feeding back the induced current generated by the speed regulating winding to an external power source after rectification and inversion; the energy feedback assembly comprises a carbon brush assembly electrically connected to the speed regulating winding, and the carbon brush assembly is arranged on the motor shaft.

[0011] The novel cantilever structure double permanent magnet speed regulating motor has at least the following advantages:

[0012] By electrically connecting the drive winding and the control assembly, the control assembly can control the current of the drive winding in the motor part to achieve speed regulation when the external power source supplies alternating current to the drive winding, which has the advantages of high speed regulation efficiency in the existing structure; and by electrically connecting the speed regulating winding and the energy feedback assembly, the induced current generated by the interaction between the speed regulating winding and the second permanent magnet rotor can be fed back to the external power source after rectification and inversion by the energy feedback assembly, which is more energy-saving; and the carbon brush assembly is arranged on the motor shaft, which is different from the existing structure in which the carbon brush assembly is arranged on the mounting shell, the rotating speed of the carbon brush assembly of the double permanent magnet speed regulating motor is the speed after speed regulation, the rotating speed is lower, the current generated by the carbon brush is smaller, the wear rate is lower, and the service life is prolonged.

[0013] In an alternative embodiment, the motor shaft extends to the outside of the drive shaft along the axial opposite end, and the carbon brush assembly is arranged on the axial opposite end of the motor shaft.

[0014] In an alternative embodiment, a first threading hole is arranged in the axial opposite end of the motor shaft, and a second threading hole is arranged on the outer wall of the motor shaft along the radial direction of the motor shaft, and the second threading hole communicates with the first threading hole; the speed regulating winding is electrically connected to the 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 alternative embodiment, a heat dissipation fan is fixedly sleeved on the outer circumferential surface of the motor shaft, and the heat dissipation fan is located between the drive shaft and the carbon brush assembly.

[0016] In an alternative embodiment, a box body is connected to the axial opposite end of the casing through a support, the support is provided with a cavity, and the heat dissipation fan is located in the cavity; the motor shaft extends into the box body along the axial opposite end and is connected to the carbon brush assembly.

[0017] In an alternative embodiment, a first end cover is detachably connected to one end of the box body away from the support along the axial direction.

[0018] In an alternative embodiment, two connecting flanges are arranged axially in the casing, and the driving shaft is connected to the two connecting flanges at two axial ends thereof through first bearings respectively.

[0019] In an alternative embodiment, second end covers are detachably connected to two axial ends of the casing respectively, and the motor shaft is connected to the second end covers at two axial ends thereof through second bearings respectively.

[0020] In an alternative embodiment, the energy feedback assembly further comprises a feedback terminal box electrically connected to the carbon brush assembly, the feedback terminal box is arranged on the outer surface of the casing, and is used for rectifying and inverting the current output by the carbon brush assembly to feedback to an external power supply.

[0021] In an alternative embodiment, the carrier is connected between the speed regulating winding and the motor shaft, and the carrier is provided with a weight-reducing ring groove on both sides in the axial direction. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 A structural schematic diagram of a novel cantilever structure double permanent magnet speed regulating motor according to an embodiment of the present application;

[0024] Figure 2 A partial structural schematic diagram of a motor part according to an embodiment of the present application;

[0025] Figure 3 A partial structural schematic diagram of a speed regulating power generation part and an energy feedback assembly according to an embodiment of the present application.

[0026] Explanation of reference signs:

[0027] 100-casing, 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-radiating fan, 350-carrier, 351-weight-reducing ring groove;

[0030] 400-control assembly;

[0031] 500-external power supply;

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

[0033] 700-support, 710-cavity;

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

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative efforts fall within the protection scope of the utility model.

[0036] In the description of the embodiments, 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 the orientation or position relationship based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the embodiments 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 embodiments. In addition, the terms 'first','second', 'third' are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the embodiments, it should be noted that, unless otherwise explicitly specified and limited, the terms'mounting', 'connection', 'connecting' should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments can be understood according to the specific circumstances.

[0038] The specific embodiments of the utility model will be described below in combination with the drawings. Figures 1 to 3The embodiment of the utility model discloses.

[0039] According to the embodiment of the utility model provides a novel cantilever structure double permanent magnet speed regulation motor, including casing 100, motor part, speed regulation power generation part and energy feedback subassembly, the rotation is connected with drive shaft 210 and motor shaft 310 in casing 100, the inner hole of drive shaft 210 is matched in the coaxial clearance of motor shaft 310, the opposite front end of motor shaft 310 along the axial extension to drive shaft 210, the opposite front end of drive shaft 210 along the axial coaxial fixed connection frame 220 has, the motor part includes drive winding 230 and first permanent magnet rotor 240, first permanent magnet rotor 240 fixedly sleeved in the outer surface of drive shaft 210, drive winding 230 is fixedly connected to the inner wall of casing 100 and is arranged opposite with first permanent magnet rotor 240, drive winding 230 is electrically connected with control assembly 400, control assembly 400 is used to realize the adjustment of motor output speed by controlling the current size in drive winding 230, the speed regulation power generation part includes speed regulation winding 320 and second permanent magnet rotor 330, second permanent magnet rotor 330 is fixedly connected to the inner wall of connecting frame 220, speed regulation winding 320 is fixedly sleeved in the outer surface of motor shaft 310 and is arranged opposite with second permanent magnet rotor 330, the energy feedback subassembly is used to rectify the induced current of speed regulation winding 320 after inverter and feedback to external power supply 500, the energy feedback subassembly includes current collection ring carbon brush assembly 610 that electrically connects speed regulation winding 320, current collection ring carbon brush assembly 610 sets up in motor shaft 310.

[0040] The output torque and power generation process of the double-permanent-magnetic speed-regulating motor of the embodiment: the external power source 500 provides AC power to the driving winding 230 of the motor part through the control assembly 400, a rotating magnetic field is generated in the driving winding 230, and the rotating magnetic field interacts with the permanent magnetic field of the first permanent-magnetic rotor 240 to generate torque, so that the first permanent-magnetic rotor 240 rotates synchronously with the rotating magnetic field of the driving winding 230, thereby causing the driving shaft 210, the connecting frame 220 and the second permanent-magnetic rotor 330 to rotate with the first permanent-magnetic rotor 240. The second permanent-magnetic rotor 330 rotating synchronously with the driving shaft 210 generates a rotating magnetic field, which on one hand cuts the rotating magnetic field generated by the second permanent-magnetic rotor 330 to form an induced current in the speed-regulating winding 320, and the induced current is rectified and inverted by the energy feedback assembly and then fed back to the external power source 500, thereby achieving energy saving; on the other hand, the speed-regulating winding 320 is connected to the machine housing 100 and rotates with the motor shaft 310, and an induced magnetic field is generated in the speed-regulating winding 320 at the same time, so that the induced magnetic field of the speed-regulating winding 320 interacts with the rotating magnetic field of the second permanent-magnetic rotor 330 to transmit torque, thereby causing the speed-regulating winding 320 to rotate and further causing the motor shaft 310 to rotate to output torque; and the rotating speed of the motor shaft 310 is lower than that of the driving shaft 210, and the rotating speed of the carbon brush assembly 610 of the double-permanent-magnetic speed-regulating motor of the embodiment is the rotating speed of the motor shaft 310, which is lower than that of the driving shaft 210, so that the current generated by the carbon brush is smaller and the abrasion rate is lower, thereby prolonging the service life.

[0041] The speed-regulating process of the double-permanent-magnetic speed-regulating motor of the embodiment: the control assembly 400 adjusts the current delivered from the external power source 500 to the driving winding 230 to adjust the size of the induced magnetic field generated in the driving winding 230 due to the current, thereby adjusting the torque generated by the driving winding 230 on the first permanent-magnetic rotor 240, and the first permanent-magnetic rotor 240 and the second permanent-magnetic rotor 330 rotate integrally, so that the rotating speed of the second permanent-magnetic rotor 330 is adjusted, thereby adjusting the rotating speed of the speed-regulating winding 320, and finally achieving the adjustment of the output rotating speed of the motor (i.e. the rotating speed of the motor shaft 310).

[0042] The control assembly 400 adjusts the current delivered from the external power source 500 to the driving winding 230 to adjust the rotating speed of the motor according to the actual needs of the load; specifically, the control assembly 400 includes a variable resistor, which adjusts the rotating speed of the motor by changing the resistance value.

[0043] It can be understood that the machine housing 100, the driving shaft 210 and the motor shaft 310 are coaxially arranged, and the axial directions of the three are the same; the axial direction herein refers to the axial direction of the motor shaft 310, and for the convenience of description, the embodiment takes Figure 1The axial direction shown in the figure is described as the axial direction of the motor shaft 310, but should not be understood as explicitly limiting the axial direction of the motor shaft 310.

[0044] Specifically, the outer surface of the casing 100 is provided with a lifting ring 130, facilitating hoisting and transportation by hoisting equipment.

[0045] As shown in Figure 1 and Figure 3 Specifically, the connecting frame 220 includes a connecting plate 221 and a mounting cylinder 222, the connecting plate 221 is coaxially connected to the opposite front end of the drive shaft 210 by bolts, and the mounting cylinder 222 is coaxially connected to the end of the connecting plate 221 away from the drive shaft 210 by bolts; the second permanent magnet rotor 330 is connected to the inner wall of the mounting cylinder 222.

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

[0047] As shown in Figure 3 Specifically, the opposite rear end of the motor shaft 310 in the axial direction is provided with a first threading hole 311, and the outer wall of the motor shaft 310 is provided with a second threading hole 312 along the radial direction of the motor shaft 310, and the second threading hole 312 is in communication 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 passes through the second threading hole 312 and the first threading hole 311 in sequence. By providing the first threading hole 311 and the second threading hole 312 for the first lead wire 321 to be hidden and embedded, it is beneficial to reduce the probability of the first lead wire 321 being pulled off under the action of centrifugal force generated during the rotation of the motor shaft 310.

[0048] Specifically, the outer peripheral surface of the motor shaft 310 is fixedly sleeved with a cooling fan 340, and the cooling fan 340 is located between the drive shaft 210 and the collector ring carbon brush assembly 610. During the rotation of the motor shaft 310 to output torque in the double permanent magnet speed regulating motor of the embodiment, the cooling fan 340 rotates synchronously with the motor shaft 310, so that the external air enters from the opposite rear end of the casing 100 and flows through the inside of the casing 100 and flows out from the opposite front end of the casing 100, taking away the heat inside the casing 100, which is beneficial to improve the heat dissipation efficiency of the double permanent magnet speed regulating motor of the embodiment, thereby improving the service life of the parts inside the casing 100.

[0049] To further improve the heat dissipation efficiency of the dual permanent magnet speed-regulating motor in this embodiment, heat dissipation fins are specifically provided on both the inner and outer walls of the housing 100.

[0050] Specifically, the housing 100 is connected to the box 800 via a support member 700 at its axially opposite rear ends. The support member 700 has a cavity 710, and the cooling fan 340 is located in the cavity 710. The motor shaft 310 extends into the box 800 along its axially opposite rear ends and is connected to the slip ring carbon brush assembly 610. By axially spacing the electric component and the speed-regulating generator component within the housing 100, and separately housing the slip ring carbon brush assembly 610 within the box 800, and placing the cooling fan 340 within the cavity 710 of the support member 700, the installation spaces for the electric component, the speed-regulating generator component, the cooling fan 340, and the slip ring carbon brush assembly 610 are made more independent axially, allowing heat from each component to accumulate in its corresponding installation space. Furthermore, as the cooling fan 340 rotates synchronously with the motor shaft 310, outside air enters axially from the rear end of the box 800, flows through the cavity 710 of the support member 700, enters the interior of the housing 100, and exits from the front end of the housing 100. This longer flow path is more conducive to removing heat from the interior of the box 800, the cavity 710, and the housing 100, resulting in higher heat dissipation efficiency.

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

[0052] Specifically, the end of the housing 800 that is axially away from the support member 700 is detachably connected to a first end cover 810 by bolts. The first end cover 810 protects components such as slip rings and carbon brushes located inside the housing 800, and the first end cover 810 can be removed when the slip rings and carbon brushes need to be repaired or replaced.

[0053] like Figure 1 and Figure 2 As shown, specifically, two connecting flanges 110 are axially spaced within the housing 100, and the two ends of the drive shaft 210 are respectively connected to the two connecting flanges 110 via first bearings 211. On one hand, the two connecting flanges 110 provide rotational support for the two ends of the drive shaft 210 along the axial direction, improving the rotational stability 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 mounting the electric components, which helps to keep the heat generated by the electric components within the first cavity 140, minimizing its impact on the speed-regulating power generation section and the energy feedback assembly.

[0054] As shown in Figure 2 Particularly, the inner wall of the casing 100 is provided with a limiting part 170 in the direction close to the axis of the casing 100, and the connecting flange 110 is detachably connected to the limiting part 170 by bolts. After the electric part is installed inside the casing 100, the connecting flange 110 is installed by bolts, and the driving shaft 210 is rotatably installed on the two connecting flanges 110 and then installed inside the casing 100. Compared with directly installing the driving shaft 210 on the casing 100, the structure of the casing 100 is simplified, and the assembly process is simpler.

[0055] As shown in Figure 1 and Figure 3 Particularly, the two ends of the casing 100 along the axial direction are detachably connected with the second end cover 120 by bolts, and the two ends of the motor shaft 310 along the axial direction are connected to the second end cover 120 by the second bearing 313. On the one hand, the two second end covers 120 rotatably support the two ends of the motor shaft 310 along the axial direction, improving the stability of the rotation of the motor shaft 310. On the other hand, the second end cover 120 located at the end opposite to the front end, the connecting flange 110 located at the end opposite to the front end, and the inner wall of the casing 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 affecting the electric part and the energy feedback assembly. At the same time, the second end cover 120 is detachably connected to the end of the casing 100 by bolts, which is convenient for rotatably installing the motor shaft 310 on the two second end covers 120 and then installing it in 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] Particularly, the end of the motor shaft 310 opposite to the front end along the axial direction penetrates through the corresponding second end cover 120 to form an output end 314.

[0057] As shown in Figure 3 Particularly, the end of the box body 800 close to the support 700 along the axial direction is also detachably connected with the first end cover 810 by bolts; and the two ends of the support 700 along the axial direction are detachably connected to the adjacent first end cover 810 and second end cover 120, which simplifies the structure of the embodiment to facilitate the assembly of the double-permanent-magnet speed-regulating motor of the embodiment.

[0058] It can be understood that through holes are formed in the first end cover 810, the second end cover 120, and the connecting flange 110 along the axial direction, so that the air from the outside flows through the inside of the box body 800, the cavity 710, and the inside of the casing 100 under the driving of the cooling fan 340 and carries the heat to the outside for cooling.

[0059] In some embodiments, the energy feedback assembly further comprises a feedback terminal box 620 electrically connected to the slip ring carbon brush assembly 610, the feedback terminal box 620 is arranged on the outer surface of the casing 100, and is used to rectify and invert the current output by the slip ring carbon brush assembly 610 and feedback to the external power supply 500; by integrating the functions of rectification and inversion in the feedback terminal box 620, the structure is more compact.

[0060] Specifically, the feedback terminal box 620 comprises a rectifier and an inverter, and is adapted to be connected to the 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, which is converted into electrical energy by the slip ring carbon brush assembly 610, and is fed back to the external power supply 500 through the rectifier and the inverter, thereby saving more energy.

[0061] The slip ring carbon brush assembly 610 is electrically connected to the feedback terminal box 620 through a third lead wire 630, the feedback terminal box 620 is arranged on the outer surface of the box body 800, the end surface of the box body 800 close to the feedback terminal box 620 is provided with a first hole 820, and the end surface of the feedback terminal box 620 close to the box body 800 is provided with a second hole 621 corresponding to the position of 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] As shown in Figure 3 In some embodiments, the speed regulating winding 320 is connected to the motor shaft 310 through a carrier 350; the carrier 350 is provided with a weight reduction ring groove 351 on both sides in the axial direction. By the transition connection of the carrier 350, the air gap between the speed regulating winding 320 and the second permanent magnet rotor 330 in the radial direction of the motor shaft 310 is smaller, the induced electromotive force and torque generated are larger, and more energy is saved; and by providing the weight reduction ring groove 351 on the carrier 350, the overall weight of the components sleeved on the motor shaft 310 can be reduced, and the energy consumption can be reduced.

[0063] In some embodiments, the drive winding 230 is electrically connected to the control assembly 400 through a second lead wire 231; the outer surface of the casing 100 is provided with a drive terminal box 250, and the end of the second lead wire 231 away from the drive winding 230 is connected to the output end 314 of the control assembly 400 and connected to the drive terminal box 250, thereby facilitating the integration of the connection between the second lead wire 231 and the output end 314 of the control assembly 400 in the drive terminal box 250.

[0064] Specifically, the third hole 251 is arranged through the end face of the drive terminal box 250 close to the shell 100, the fourth hole 160 is arranged through the position of the end face of the shell 100 close to the drive terminal box 250 corresponding to the third hole 251, and the second lead wire 231 is arranged to pass through the third hole 251 and the fourth hole 160, so that the assembly difficulty is simplified.

[0065] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A new type of cantilever structure double permanent magnet speed-adjustable motor, characterized in that, The utility model relates to a motor, including: The casing (100) is connected with drive shaft (210) and motor shaft (310) in rotation inside, the motor shaft (310) is coaxially gap fit in the inner hole of drive shaft (210), the opposite front end of motor shaft (310) extends to the outside of drive shaft (210) along the axial direction, and the opposite front end of drive shaft (210) is fixed with the connecting frame (220) along the axial direction. The electric part includes drive winding (230) and first permanent magnet rotor (240), the first permanent magnet rotor (240) is fixedly sleeved on the outer surface of drive shaft (210), and drive winding (230) is fixedly connected to the inner wall of casing (100) and is arranged opposite to first permanent magnet rotor (240). The control assembly (400) is electrically connected with drive winding (230), and the control assembly (400) is used to realize the adjustment of motor output speed by controlling the current size in drive winding (230). The speed regulating power generation part includes speed regulating winding (320) and second permanent magnet rotor (330), the second permanent magnet rotor (330) is fixedly connected to the inner wall of connecting frame (220), and speed regulating winding (320) is fixedly sleeved on the outer surface of motor shaft (310) and is arranged opposite to second permanent magnet rotor (330). The energy feedback assembly is used to rectify and invert the induced current generated by speed regulating winding (320) and then feedback to external power supply (500), and the energy feedback assembly includes carbon brush assembly (610) electrically connected with speed regulating winding (320), and carbon brush assembly (610) is arranged on motor shaft (310).

2. A novel cantilever construction double permanent magnet speed adjustable motor according to claim 1, characterized in that, The opposite rear end of motor shaft (310) extends to the outside of drive shaft (210), and carbon brush assembly (610) is arranged on the opposite rear end of motor shaft (310) along the axial direction.

3. A novel cantilever construction double permanent magnet speed adjustable motor according to claim 2, characterized in that, The opposite rear end of motor shaft (310) is provided with first threading hole (311), and the outer wall of motor shaft (310) is provided with second threading hole (312) along the radial direction of motor shaft (310), and second threading hole (312) is communicated with first threading hole (311); speed regulating winding (320) is electrically connected with carbon brush assembly (610) through first lead wire (321), and first lead wire (321) passes through second threading hole (312) and first threading hole (311) in sequence.

4. A novel cantilever construction double permanent magnet speed adjustable motor according to claim 2, characterized in that, The outer surface of motor shaft (310) is fixedly sleeved with heat dissipation fan (340), and heat dissipation fan (340) is located between drive shaft (210) and carbon brush assembly (610).

5. A novel cantilever construction double permanent magnet speed adjustable motor according to claim 4, characterized in that, The opposite rear end of casing (100) is connected with box (800) through support (700), support (700) is provided with cavity (710), heat dissipation fan (340) is located in cavity (710), and the opposite rear end of motor shaft (310) extends into box (800) and is connected with carbon brush assembly (610) along the axial direction.

6. A novel cantilever construction double permanent magnet motor of claim 5, characterized in that, The box (800) is detachably connected with a first end cover (810) at an end axially opposite to the support (700).

7. A new type of double permanent magnet speed adjustable motor with cantilever structure according to claim 1 or 5, characterized in that, Two connecting flanges (110) are axially spaced apart in the casing (100), and the driving shaft (210) is connected to the two connecting flanges (110) through first bearings (211) at two axially opposite ends thereof.

8. A novel cantilever construction double permanent magnet speed adjustable motor according to claim 7, characterized in that, Second end covers (120) are detachably connected to the casing (100) at two axially opposite ends thereof, and the motor shaft (310) is connected to the second end covers (120) through second bearings (313) at two axially opposite ends thereof.

9. A new type of double permanent magnet speed adjustable motor with cantilever structure according to claim 1 or 4, characterized in that, The energy feedback assembly further comprises a feedback junction box (620) electrically connected to the slip ring carbon brush assembly (610), the feedback junction box (620) is arranged on the outer surface of the casing (100), and is used for rectifying and inverting the current output by the slip ring carbon brush assembly (610) and feeding back to an external power supply (500).

10. A new type of double permanent magnet speed adjustable motor with cantilever structure according to claim 1, characterized in that, The speed regulating winding (320) and the motor shaft (310) are connected through a carrier (350), and the carrier (350) is provided with weight-reducing grooves (351) at two axially opposite sides thereof.

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