Permanent magnet synchronous motor with inner rotor and outer rotor mixed structure

Abstract

The utility model provides a permanent magnet synchronous motor with an inner and outer rotor mixed structure, and relates to the technical field of motor design, the permanent magnet synchronous motor comprises an outer rotor motor, an inner rotor motor and a rotating shaft, the outer rotor motor comprises an outer rotor motor shell, an outer rotor motor stator and an outer rotor motor rotor, the outer rotor motor shell is connected to the rotating shaft, and the outer rotor motor stator is connected to the rotating shaft. The outer rotor motor stator is sleeved on the rotating shaft, the outer rotor motor rotor is fixedly connected in the outer rotor motor shell, the inner rotor motor comprises an inner rotor motor shell, an inner rotor motor stator and an inner rotor motor rotor, and the rotating shaft penetrates through the inner rotor motor shell. The inner rotor motor shell is fixedly connected with the outer rotor motor stator, the inner rotor motor rotor is sleeved on the rotating shaft, and the inner rotor motor stator is fixedly connected on the inner rotor motor shell. According to the utility model, the requirement of high rotating speed can be met while the large starting torque is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of inner rotor and outer rotor hybrid structure permanent magnet synchronous motor technical field, in particular to a kind of inner rotor and outer rotor hybrid structure permanent magnet synchronous motor. BACKGROUND

[0002] With the rapid development of power electronics technology and the improvement of the performance-price ratio of permanent magnet material, permanent magnet synchronous motor has been widely used in recent years due to its simple structure, good control performance and high efficiency, therefore, it is of great significance to study permanent magnet synchronous motor.

[0003] Currently, permanent magnet synchronous motors can be divided into inner rotor permanent magnet synchronous motors and outer rotor permanent magnet synchronous motors. Most applications use inner rotor permanent magnet synchronous motors, which have small rotational inertia and fast dynamic response speed, making them suitable for use as servo motors that need to start and stop frequently. In addition, the speed range of inner rotor permanent magnet synchronous motors is wide, making them suitable for use as high-speed motors with a speed exceeding 10,000 rpm. However, the starting torque of inner rotor motors is small, which limits their application in some situations, such as elevator drive applications that require a large starting torque. If an inner rotor motor is used, a speed changer needs to be added to increase the starting torque of the motor. The operating principle of outer rotor permanent magnet synchronous motors is the same as that of inner rotor permanent magnet synchronous motors, but their structures are quite different. The armature winding is installed on the outside of the inner stator, and the permanent magnet is installed on the inside of the outer rotor. In recent years, the application of outer rotor motors has gradually increased. Outer rotor permanent magnet synchronous motors have high torque density and can obtain high output torque with the same motor size, and have a large starting torque. However, their disadvantage is that the rotational inertia of the outer rotor is large, and the dynamic response speed is slow, making them unsuitable for servo control and high-speed operation.

[0004] Therefore, when a motor needs to have a large starting torque and achieve a high speed in some situations, such as a backward centrifugal wind wheel that needs to start in strong adverse wind conditions by increasing the ampere turns of the motor winding to increase the starting torque, but also needs the fan to reach a medium-high speed of 5,000 rpm per minute, it is difficult to meet the requirements of large starting torque and high speed with only an inner rotor motor or an outer rotor motor. UTILITY MODEL CONTENTS

[0005] To solve the problem of the existing technology that it is difficult to simultaneously meet the requirements of large starting torque and high speed, the utility model provides an inner rotor and outer rotor hybrid structure permanent magnet synchronous motor that meets the requirements of large starting torque and high speed.

[0006] To achieve the above technical effects, the technical solution of the utility model is as follows:

[0007] The application discloses an inner-outer rotor mixed structure permanent magnet synchronous motor, which comprises an outer rotor motor, an inner rotor motor and a rotating shaft, the outer rotor motor comprises an outer rotor motor shell, an outer rotor motor stator and an outer rotor motor rotor, the outer rotor motor shell is connected to the rotating shaft, the outer rotor motor stator is sleeved on the rotating shaft, and the outer rotor motor rotor is fixedly connected in the outer rotor motor shell; the inner rotor motor comprises an inner rotor motor shell, an inner rotor motor stator and an inner rotor motor rotor, the rotating shaft penetrates through the inner rotor motor shell, the inner rotor motor shell is fixedly connected with the outer rotor motor stator, and the inner rotor motor rotor is sleeved on the rotating shaft.

[0008] Preferably, the outer rotor motor shell comprises a bottom end cover and a cylindrical body, the bottom end cover is connected to the bottom of the cylindrical body, the inner wall of the cylindrical body is provided with the outer rotor motor rotor, and the hollow cavity of the cylindrical body is provided with the outer rotor motor stator; the stable connection of the bottom end cover and the bottom of the cylindrical body, the effective support of the inner wall of the cylindrical body on the outer rotor motor rotor and the reasonable accommodation of the hollow cavity on the outer rotor motor stator realize the compactness and stability of the motor structure, optimize the magnetic field distribution, and thus the operation efficiency and performance of the outer rotor motor are improved.

[0009] Preferably, the middle part of the outer rotor motor stator is provided with a first bearing, and the outer rotor motor stator is sleeved on the rotating shaft through the first bearing; the stable and low-friction rotating connection between the outer rotor motor stator and the rotating shaft is realized by providing the first bearing in the middle part of the outer rotor motor stator and sleeving the outer rotor motor stator on the rotating shaft through the first bearing, so that the stability of the outer rotor motor operation is ensured, energy loss is reduced, and the operation efficiency and service life of the outer rotor motor are improved.

[0010] Preferably, the inner rotor motor shell comprises a front end cover, a rear end cover and a cylindrical shell, the front end cover is connected to one side of the cylindrical shell, the other side of the cylindrical shell is connected with the rear end cover, the inner wall of the cylindrical shell is fixedly connected with the inner rotor motor stator, and the hollow cavity of the cylindrical shell is provided with the inner rotor motor rotor; the stable connection of the front end cover, the rear end cover and the cylindrical shell and the fixed installation of the inner wall of the cylindrical shell on the inner rotor motor stator form a complete and solid motor internal space, and good support is provided for the stable rotation of the inner rotor motor rotor.

[0011] Preferably, a second bearing is arranged in the middle part of the front end cover and sleeved on the rotating shaft. By arranging the second bearing in the middle part of the front end cover and sleeving the second bearing on the rotating shaft, the low-friction and high-stability rotary connection between the rotating shaft and the front end cover is achieved, the friction loss during the operation of the inner rotor motor is effectively reduced, the operation efficiency and service life of the inner rotor motor are improved, and the overall stability and reliability of the structure of the inner rotor motor are enhanced.

[0012] Preferably, a third bearing is arranged in the middle part of the rear end cover and sleeved on the rotating shaft. By arranging the third bearing in the middle part of the rear end cover and sleeving the third bearing on the rotating shaft, the low-friction and high-stability rotary connection between the rotating shaft and the rear end cover is achieved, the overall operation stability and durability of the inner rotor motor are improved, and the maintenance of the inner rotor motor is facilitated.

[0013] Preferably, the outer rotor motor rotor includes a plurality of outer rotor motor permanent magnets arranged at equal intervals, and the inner rotor motor rotor is embedded with a plurality of inner rotor motor permanent magnets arranged at equal intervals. By arranging the outer rotor motor permanent magnets and the inner rotor motor permanent magnets, the distribution of the magnetic field of the outer rotor motor and the inner rotor motor is optimized, the electromagnetic performance of the outer rotor motor and the inner rotor motor is improved, and the outer rotor motor and the inner rotor motor can generate more stable and powerful torque during operation, thereby improving the overall efficiency and output capacity of the outer rotor motor and the inner rotor motor.

[0014] Preferably, the outer rotor motor stator is embedded with an outer rotor motor three-phase winding, and the inner rotor motor stator is embedded with an inner rotor motor three-phase winding.

[0015] Preferably, the outer rotor motor three-phase winding includes an outer rotor motor U-phase winding, an outer rotor motor V-phase winding, and an outer rotor motor W-phase winding, and the inner rotor motor three-phase winding includes an inner rotor motor U-phase winding, an inner rotor motor V-phase winding, and an inner rotor motor W-phase winding.

[0016] Preferably, one end of the inner rotor motor U-phase winding, one end of the inner rotor motor V-phase winding, and one end of the inner rotor motor W-phase winding are electrically connected together, the other end of the inner rotor motor U-phase winding is connected to one end of the outer rotor motor U-phase winding, the other end of the outer rotor motor U-phase winding is connected to a U-phase winding of a motor controller, the other end of the inner rotor motor V-phase winding is connected to one end of the outer rotor motor V-phase winding, the other end of the outer rotor motor V-phase winding is connected to a V-phase winding of the motor controller, and the other end of the inner rotor motor W-phase winding is connected to one end of the outer rotor motor W-phase winding, and the other end of the outer rotor motor W-phase winding is connected to a V-phase winding of the motor controller.

[0017] Compared with the prior art, the beneficial effects of the technical scheme of the utility model are:

[0018] The utility model provides a kind of inner-outer rotor hybrid structure permanent magnet synchronous motor, including outer rotor motor, inner rotor motor and shaft, when permanent magnet synchronous motor is started and low-speed operation, outer rotor motor is driven under external three-phase power supply and plays leading role, when outer rotor motor stator energization generates magnetic field, outer rotor motor rotor can be driven and rotate by magnetic field, to drive shaft rotation, purpose is when starting and low-speed operation, it can obtain greater starting torque and low-speed output torque, meet the demand of motor in starting stage and low-speed operation;When permanent magnet synchronous motor enters medium-high speed operation, inner rotor motor is driven under external three-phase power supply and plays leading role, when inner rotor motor stator energization generates magnetic field, inner rotor motor rotor can be driven and rotate by magnetic field, accelerate the rotation of shaft, so that motor obtains greater high-speed output torque. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It shows that a kind of inner-outer rotor hybrid structure permanent magnet synchronous motor of the utility model embodiment is shown in schematic view of main view section;

[0020] Figure 2 It shows that a kind of inner-outer rotor hybrid structure permanent magnet synchronous motor of the utility model embodiment is shown in schematic view of main view section;

[0021] Figure 3 It shows that the outer rotor motor stator of the utility model embodiment is shown in schematic view;

[0022] Figure 4 It shows that the inner rotor motor stator of the utility model embodiment is shown in schematic view;

[0023] Figure 5 It shows that the outer rotor motor three-phase winding and the circuit connection diagram of inner rotor motor three-phase winding of the utility model embodiment are shown.

[0024] 100. outer rotor motor; 101. outer rotor motor housing; 1011. bottom end cover; 1012. cylinder body; 102. outer rotor motor stator; 103. outer rotor motor rotor; 1031. outer rotor motor permanent magnet; 104. connecting block; 200. inner rotor motor; 201. inner rotor motor housing; 2011. front end cover; 2012. rear end cover; 2013. cylindrical shell; 202. inner rotor motor stator; 203. inner rotor motor rotor; 2031. inner rotor motor permanent magnet; 300. rotating shaft; 301. first bearing; 302. second bearing; 303. third bearing; 400. outer rotor motor three-phase winding; 401. outer rotor motor V-phase winding; 402. outer rotor motor U-phase winding; 403. outer rotor motor W-phase winding; 500. inner rotor motor three-phase winding; 501. inner rotor motor U-phase winding; 502. inner rotor motor V-phase winding; 503. inner rotor motor W-phase winding. DETAILED DESCRIPTION

[0025] The accompanying drawings are only used for illustrative purposes and should not be construed as limiting the patent;

[0026] In order to better illustrate the embodiment, some parts of the drawings may be omitted, enlarged or reduced, and the description of the direction of "up", "down" and the like is not limited to the patent;

[0027] For those skilled in the art, it is understandable that some well-known content in the drawings may be omitted;

[0028] The terms used to describe the positional relationship in the drawings are only used for illustrative purposes and should not be construed as limiting the patent;

[0029] The technical scheme of the utility model will be further described below in combination with the drawings and embodiments.

[0030] Embodiment 1

[0031] As Figure 1The embodiment shown provides an inner-outer rotor mixed structure permanent magnet synchronous motor, which comprises an outer rotor motor 100, an inner rotor motor 200 and a rotating shaft 300, the outer rotor motor 100 and the inner rotor motor 200 share the rotating shaft 300; the outer rotor motor 100 comprises an outer rotor motor shell 101, an outer rotor motor stator 102 and an outer rotor motor rotor 103, the outer rotor motor shell 101 is connected to the rotating shaft 300, the outer rotor motor stator 102 is sleeved on the rotating shaft 300, and the outer rotor motor rotor 103 is fixedly connected in the outer rotor motor shell 101; the inner rotor motor 200 comprises an inner rotor motor shell 201, an inner rotor motor stator 202 and an inner rotor motor rotor 203, the rotating shaft 300 penetrates through the inner rotor motor shell 201, the inner rotor motor shell 201 is fixedly connected with the outer rotor motor stator 102 through a connecting block 104, and the inner rotor motor rotor 203 is sleeved on the rotating shaft 300.

[0032] Referring to Figure 2 The outer rotor motor shell 101 comprises a bottom end cover 1011 and a cylindrical body 1012, the bottom end cover 1011 is connected with the bottom of the cylindrical body 1012, the outer rotor motor rotor 103 is arranged on the inner wall of the cylindrical body 1012, and the outer rotor motor stator 102 is arranged in the hollow cavity of the cylindrical body 1012; through the stable connection of the bottom end cover and the bottom of the cylindrical body, the effective support of the cylindrical inner wall on the outer rotor motor rotor and the reasonable accommodation of the hollow cavity on the outer rotor motor stator, the compactness and stability of the motor structure are realized, the magnetic field distribution is optimized, and thus the operation efficiency and performance of the outer rotor motor are improved.

[0033] The inner rotor motor shell 201 comprises a front end cover 2011, a rear end cover 2012 and a cylindrical shell 2013, the front end cover 2011 is connected with one side of the cylindrical shell 2013, the other side of the cylindrical shell 2013 is connected with the rear end cover 2012, the inner wall of the cylindrical shell 2013 is fixedly connected with the inner rotor motor stator 202, and the inner rotor motor rotor 203 is arranged in the hollow cavity of the cylindrical shell 2013; the front end cover 2011 in the inner rotor motor shell 201 is fixedly connected with the outer rotor motor stator 102 through the connecting block 104, and through the stable connection of the front end cover, the rear end cover and the cylindrical shell and the fixed installation of the cylindrical inner wall on the inner rotor motor stator, a complete and solid motor internal space is formed, and good support is provided for the stable rotation of the inner rotor motor rotor.

[0034] In the embodiment, when the permanent magnet synchronous motor is started and runs at low speed, the outer rotor motor is driven by the external three-phase power supply, when the outer rotor motor stator generates a magnetic field, the outer rotor motor rotor is driven to rotate by the magnetic field, thereby driving the rotating shaft to rotate, the purpose is to obtain larger starting torque and low speed output torque when starting and running at low speed, meet the demand of the motor in the starting stage and low speed running; when the permanent magnet synchronous motor enters the medium and high speed running, the inner rotor motor is driven by the external three-phase power supply, when the inner rotor motor stator generates a magnetic field, the inner rotor motor rotor is driven to rotate by the magnetic field, accelerates the rotation of the rotating shaft, so that the motor obtains larger high speed output torque.

[0035] Embodiment 2

[0036] Referring to Figure 2 , the middle part of the outer rotor motor stator 102 is provided with a first bearing 301, and the outer rotor motor stator 102 is sleeved on the rotating shaft 300 through the first bearing 301; by providing the first bearing in the middle part of the outer rotor motor stator, and sleeving the outer rotor motor stator on the rotating shaft through the first bearing, the stable and low friction rotating connection between the outer rotor motor stator and the rotating shaft is realized, which not only ensures the stability of the outer rotor motor operation, but also reduces the energy loss, improves the operation efficiency and service life of the outer rotor motor.

[0037] The middle part of the front end cover 2011 is provided with a second bearing 302, and the second bearing 302 is sleeved on the rotating shaft 300, by providing the second bearing in the middle part of the front end cover, and sleeving the second bearing on the rotating shaft, the low friction and high stability rotating connection between the rotating shaft and the front end cover is realized, which effectively reduces the friction loss of the inner rotor motor during operation, improves the operation efficiency and service life of the inner rotor motor, and also enhances the overall stability and reliability of the inner rotor motor structure.

[0038] The middle part of the rear end cover 2022 is provided with a third bearing 303, and the third bearing 303 is sleeved on the rotating shaft, by providing the third bearing in the middle part of the rear end cover, and sleeving the third bearing on the rotating shaft, the low friction and high stability rotating connection between the rotating shaft and the rear end cover is realized, which improves the overall operation stability and durability of the inner rotor motor, and also provides convenience for the maintenance of the inner rotor motor.

[0039] Referring to Figure 3 , the outer rotor motor rotor 103 includes a plurality of outer rotor motor permanent magnets 1031 distributed at equal intervals, referring to Figure 4The inner rotor motor rotor 203 is embedded with a plurality of inner rotor motor permanent magnets 2031 distributed at equal intervals; the number of the inner rotor motor permanent magnets 2031 is the same as that of the outer rotor motor permanent magnets 1031. The inner rotor motor stator 202 and the outer rotor motor stator 102 have the same slot number. Through the outer rotor motor permanent magnets and the inner rotor motor permanent magnets, not only the distribution of the magnetic field of the outer rotor motor and the inner rotor motor is optimized, the electromagnetic performance of the outer rotor motor and the inner rotor motor is improved, but also the outer rotor motor and the inner rotor motor can generate more stable and powerful torque when running, thereby improving the overall efficiency and output capacity of the outer rotor motor and the inner rotor motor.

[0040] Embodiment 3

[0041] Referring to Figure 2 The outer rotor motor stator 102 is embedded with an outer rotor motor three-phase winding 400, and the inner rotor motor stator 202 is embedded with an inner rotor motor three-phase winding 500.

[0042] Referring to Figure 5 The outer rotor motor three-phase winding 400 includes an outer rotor motor U-phase winding 401, an outer rotor motor V-phase winding 402 and an outer rotor motor W-phase winding 403, and the inner rotor motor three-phase winding 500 includes an inner rotor motor U-phase winding 501, an inner rotor motor V-phase winding 502 and an inner rotor motor W-phase winding 503; one end of the inner rotor motor U-phase winding 501, one end of the inner rotor motor V-phase winding 502 and one end of the inner rotor motor W-phase winding 503 are commonly electrically connected, the other end of the inner rotor motor U-phase winding 501 is connected with one end of the outer rotor motor U-phase winding 401, the other end of the outer rotor motor U-phase winding 401 is connected with a U-phase winding of a motor controller, the other end of the inner rotor motor V-phase winding 502 is connected with one end of the outer rotor motor V-phase winding 402, the other end of the outer rotor motor V-phase winding 402 is connected with a V-phase winding of the motor controller, and the other end of the inner rotor motor W-phase winding 503 is connected with one end of the outer rotor motor W-phase winding 403, the other end of the outer rotor motor W-phase winding 403 is connected with a V-phase winding of the motor controller.

[0043] Embodiment 4

[0044] The embodiment provides an inner-outer rotor hybrid structure permanent magnet synchronous motor and a fan whole machine composed of a wind wheel, which comprises an outer rotor motor, an inner rotor motor, a rotating shaft, a motor controller and a wind wheel, the wind wheel is connected with the rotating shaft, the motor controller is used for controlling the outer rotor motor or the inner rotor motor to drive the rotating shaft to rotate, thereby driving the wind wheel to rotate,

[0045] The performance data comparison test is made between the inner-outer rotor mixed structure permanent magnet synchronous motor proposed in the embodiment and the experimental data of the conventional outer rotor motor driving the wind wheel alone, and the comparison test results are shown in Table 1. The wind wheel is originally driven by the outer rotor motor alone, the maximum power is 800 watts, and the highest speed is 2500 revolutions per minute. The wind wheel is driven by the inner-outer rotor mixed structure permanent magnet synchronous motor proposed in the embodiment, the maximum power can be increased to 2500 watts, and the highest speed can be increased to 3900 revolutions per minute.

[0046] Table 1 Comparison table of performance data of different motors

[0047]

[0048] From the above analysis, in the experiment of driving the wind wheel, the maximum power of the inner-outer rotor mixed structure permanent magnet synchronous motor proposed in the embodiment can be increased from the original 800 watts to 2500 watts, which is a significant increase, indicating that the inner-outer rotor mixed structure permanent magnet synchronous motor proposed in the embodiment has stronger power in providing power. At the same time, the highest speed of the inner-outer rotor mixed structure permanent magnet synchronous motor proposed in the embodiment is also increased from 2500 revolutions per minute to 3900 revolutions per minute. The increase in speed means that the wind wheel can rotate more times in a unit of time, and meets the demand of high speed while meeting the demand of large starting torque.

[0049] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not limited to the embodiments of the utility model. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. An inner-outer rotor hybrid structure permanent magnet synchronous motor, characterized in that, Include: The outer rotor motor (100), inner rotor motor (200) and shaft (300), the outer rotor motor (100) includes outer rotor motor shell (101), outer rotor motor stator (102) and outer rotor motor rotor (103), the outer rotor motor shell (101) is connected on the shaft (300), the outer rotor motor stator (102) is sleeved on the shaft (300), the outer rotor motor rotor (103) is fixedly connected in the outer rotor motor shell (101), the inner rotor motor (200) includes inner rotor motor shell (201), inner rotor motor stator (202) and inner rotor motor rotor (203), the shaft (300) penetrates the inner rotor motor shell (201), the inner rotor motor shell (201) is fixedly connected with the outer rotor motor stator (102), the inner rotor motor rotor (203) is sleeved on the shaft (300), and the inner rotor motor stator (202) is fixedly connected on the inner rotor motor shell (201).

2. The IPMSM with hybrid structure of internal and external rotor according to claim 1, characterized in that, The outer rotor motor shell (101) includes bottom end cover (1011) and cylindrical body (1012), the bottom end cover (1011) is connected with the bottom of cylindrical body (1012), the inner wall of cylindrical body (1012) is provided with the outer rotor motor rotor (103), and the hollow cavity of cylindrical body (1012) is provided with the outer rotor motor stator (102).

3. The IPMSM with hybrid structure of internal and external rotor according to claim 1, characterized in that, The middle part of the outer rotor motor stator (102) is provided with a first bearing (301), and the outer rotor motor stator (102) is sleeved on the shaft (300) through the first bearing (301).

4. The IPMSM with hybrid structure of internal and external rotor according to claim 1, characterized in that, The inner rotor motor shell (201) includes front end cover (2011), rear end cover (2012) and cylindrical shell (2013), the front end cover (2011) is connected with one side of cylindrical shell (2013), the other side of cylindrical shell (2013) is connected with the rear end cover (2012), the inner wall of cylindrical shell (2013) is fixedly connected with the inner rotor motor stator (202), and the hollow cavity of cylindrical shell (2013) is provided with the inner rotor motor rotor (203).

5. The internal-external rotor hybrid structure permanent magnet synchronous motor of claim 4, wherein, The middle part of the front end cover (2011) is provided with a second bearing (302), and the second bearing (302) is sleeved on the shaft (300).

6. The IPMSM with hybrid structure of internal and external rotor according to claim 4, characterized in that, The middle part of the rear end cover (2012) is provided with a third bearing (303), and the third bearing (303) is sleeved on the shaft (300).

7. The IPMSM with hybrid structure of internal and external rotor according to claim 1, characterized in that, The outer rotor motor rotor (103) includes a plurality of equally spaced outer rotor motor permanent magnets (1031), and the inner rotor motor rotor (203) is embedded with a plurality of equally spaced inner rotor motor permanent magnets (2031).

8. The IPMSM with hybrid structure of internal and external rotor according to claim 1, characterized by, The outer rotor motor stator (102) is embedded with an outer rotor motor three-phase winding (400), and the inner rotor motor stator (202) is embedded with an inner rotor motor three-phase winding (500).

9. The internal-external rotor hybrid structure permanent magnet synchronous motor of claim 8, wherein, The outer rotor motor three-phase winding (400) comprises an outer rotor motor U-phase winding (401), an outer rotor motor V-phase winding (402) and an outer rotor motor W-phase winding (403), and the inner rotor motor three-phase winding (500) comprises an inner rotor motor U-phase winding (501), an inner rotor motor V-phase winding (502) and an inner rotor motor W-phase winding (503).

10. The internal-external rotor hybrid structure permanent magnet synchronous motor of claim 9, wherein, One end of the inner rotor motor U-phase winding (501), one end of the inner rotor motor V-phase winding (502) and one end of the inner rotor motor W-phase winding (503) are electrically connected together, the other end of the inner rotor motor U-phase winding (501) is connected with one end of the outer rotor motor U-phase winding (401), the other end of the outer rotor motor U-phase winding (401) is connected with a U-phase winding of a motor controller, the other end of the inner rotor motor V-phase winding (502) is connected with one end of the outer rotor motor V-phase winding (402), the other end of the outer rotor motor V-phase winding (402) is connected with a V-phase winding of the motor controller, and the other end of the inner rotor motor W-phase winding (503) is connected with one end of the outer rotor motor W-phase winding (403), and the other end of the outer rotor motor W-phase winding (403) is connected with a V-phase winding of the motor controller.

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