Radial composite structure motor, driving system and working method

Abstract

The invention provides a radial composite structure motor, a driving system and a working method.The motor comprises a composite stator, a permanent magnet rotor and a salient pole rotor, the composite stator is located between the two rotors, a first salient pole is arranged on the side, close to the composite stator, of the salient pole rotor, and the composite stator comprises a composite stator iron core; the composite stator iron core is divided into a second stator and a first stator by a magnetism isolating ring, the first stator comprises a first stator iron core and a first stator winding, a plurality of first iron cores are arranged on the side, close to the salient pole rotor, of the first stator iron core, and a first permanent magnet is arranged between every two adjacent first iron cores; the first stator comprises a first permanent magnet and a first iron core adjacent to the first permanent magnet, the first stator winding is arranged on the first permanent magnet and the first iron core adjacent to the first permanent magnet, the second stator comprises a second stator iron core, a second iron core is arranged on the second stator iron core, a second stator winding is arranged on the second iron core, and the permanent magnet rotor comprises a rotor iron core provided with a second permanent magnet. While the torque density and the power density of the motor are improved, the driving requirements of the automobile under different driving working conditions are considered.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a radial composite structure motor, a drive system and a working method. Background Art

[0002] With the increasing pollution in the world, energy conservation, emission reduction, low carbon and environmental protection have become the consensus of mankind. Among them, the growing number of cars has caused the pollution of exhaust emissions to the environment to attract human attention. The emergence of new energy vehicles such as pure electric and hybrid vehicles has greatly reduced the pollution of automobile exhaust to the environment. Pure electric vehicles are pollution-free, but the current battery technology causes pure electric vehicles to have defects such as limited driving mileage and excessive dependence on charging piles; and although hybrid electric vehicles have slight pollution, due to their strong endurance and the advantages of getting rid of excessive dependence on charging piles, hybrid electric vehicles will still be the main direction of new energy vehicle development in the future.

[0003] At present, hybrid vehicles usually use two motors as the integration of the drive and power system. One motor is directly connected to the internal combustion engine to operate as a generator, and the generated electrical energy is stored in the battery through the stator winding. The other motor is connected to the wheel drive system to operate as an electric motor.

[0004] However, the use of existing dual-motor drive technology solutions has certain limitations: on the one hand, the control difficulty and accuracy requirements for the electric drive system will be greatly increased, especially when switching between different working modes; on the other hand, it is limited by the installation space of the vehicle chassis, and the fact that the electric motor drive motor wheel system generally requires a reducer, so the design and installation of the two motors of the hybrid vehicle make the drive and power system low in integration and complex in installation. The multi-motor drive system puts higher requirements on the limited space inside the electric vehicle, which also limits the further promotion of the multi-drive motor system.

[0005] At the same time, in recent years, people's design requirements for electric vehicle drive motors have mainly focused on improving endurance by changing the torque density of the motor, with less improvement in motor integration and efficiency. In addition, electric vehicles have a variety of operating conditions during actual driving, such as long operation time under non-rated conditions such as starting, braking, frequent acceleration and deceleration, heavy-load climbing, and high-speed cruising, and the existing drive system is difficult to meet the drive requirements. It is necessary to take into account the drive requirements of the car under different driving conditions while improving the torque density and power density of the motor.

[0006] Therefore, how to achieve multi-mode operation of the motor while improving the motor torque density and space utilization has become an important research topic in the field of new energy hybrid vehicle drive. Summary of the invention

[0007] In order to solve the problems in the background technology, the present invention proposes a radial composite structure motor, a drive system and a working method. The radial composite structure motor includes a composite stator, a permanent magnet rotor and a salient pole rotor. The composite stator is located between the permanent magnet rotor and the salient pole rotor. The salient pole rotor is provided with a plurality of first salient poles distributed along the circumferential direction on a side close to the composite stator. The composite stator includes a composite stator core and a magnetic isolation ring. The composite stator core is separated by the magnetic isolation ring into a second stator and a first stator arranged radially. The first stator includes a first stator core and a plurality of first stator windings. The first A plurality of first cores and first permanent magnets distributed along the circumferential direction are provided on one side of the stator core close to the salient pole rotor, the first permanent magnet is arranged between two adjacent first cores, each of the first stator windings is arranged on the first permanent magnet and its adjacent first core, the second stator includes a second stator core and a second stator winding, a plurality of second cores distributed along the circumferential direction are provided on the second stator core, and each second core is provided with a second stator winding, the permanent magnet rotor includes a rotor core and a plurality of second permanent magnets distributed along the circumferential direction, the second permanent magnets are arranged on the rotor core. Preferably, a rotor inner sleeve is provided on a side of the rotor core close to the second stator, and a rotor outer sleeve is provided on a side of the rotor core away from the second stator, and the inner sleeve and the outer sleeve cover the second permanent magnet.

[0008] Preferably, the second permanent magnet includes a NdFeB permanent magnet and two composite permanent magnets, the two composite permanent magnets are respectively located on both sides of the NdFeB permanent magnet and are symmetrically arranged, the length direction of the NdFeB permanent magnet is perpendicular to the axis direction of the rotor core, the materials at both ends of the length direction of the composite permanent magnet are NdFeB and ferrite respectively, the end of the composite permanent magnet material being NdFeB is inclined toward the NdFeB permanent magnet, and the end of the composite permanent magnet material being NdFeB is far away from the second stator, and the end of the composite permanent magnet material being ferrite is close to the second stator, and a magnetic isolation bridge is provided between adjacent NdFeB permanent magnets.

[0009] Preferably, the salient pole rotor and the first salient poles are both made of magnetic conductive materials, the salient pole rotor and the first salient poles are integrally formed, and the number of the first salient poles is ten.

[0010] Preferably, the first iron core is in an inverted U shape, the first permanent magnet is installed between two inverted U-shaped first iron cores to form a first stator armature tooth, the number of the first stator armature teeth is 12, and the first stator winding is in the form of a concentrated winding installed on the first stator armature teeth.

[0011] Preferably, the first permanent magnet is a built-in rectangular structure, the first permanent magnet is tangentially magnetized, and the magnetization directions of two adjacent first permanent magnets are opposite, and the material of the first permanent magnet is neodymium iron boron.

[0012] The drive system includes a drive controller, a battery, a first inverter, a first DC-DC device, a second inverter and a second DC-DC device. The salient pole rotor and the first stator form a flux switching motor, the second stator and the permanent magnet rotor form a permanent magnet synchronous motor, the first stator winding is connected to the first DC-DC device through the first inverter, the second stator winding is connected to the second DC-DC device through the second inverter, the battery is connected to the first DC-DC device and the second DC-DC device respectively, one end of the salient pole rotor output shaft is connected to the internal combustion engine, the permanent magnet rotor is connected to the rear wheel drive mechanism of the vehicle, and the drive controller is connected to the front wheel drive mechanism of the vehicle, the rear wheel drive mechanism of the vehicle, the battery and the internal combustion engine respectively.

[0013] Preferably, one end of the salient pole rotor output shaft is connected to the internal combustion engine through a first clutch, and the other end of the salient pole rotor output shaft is connected to the front wheel drive mechanism of the vehicle through a second clutch. The first clutch and the second clutch are not closed at the same time, and both the first clutch and the second clutch are connected to the drive controller.

[0014] The working method comprises the following steps: the flux switching motor is connected to the internal combustion engine to operate as a generator, and the generated electrical energy is stored in a battery through a first inverter and a first DC-DC device; The battery supplies power to the permanent magnet synchronous motor through the second inverter and the second DC-DC device, and the permanent magnet synchronous motor operates as the motor of the rear wheel drive mechanism of the vehicle.

[0015] Preferably, when the battery power reaches the lower limit of charging, the vehicle drive controller detects the battery power and sends a signal to control the first clutch to connect the flux switching motor and the internal combustion engine, and the front wheel drive mechanism of the vehicle is disengaged from the second clutch. At this time, the flux switching motor is connected to the internal combustion engine through the first clutch to operate as a generator, and the generated power is stored in the battery through the first inverter and the first DC-DC device; When the battery energy reaches the upper limit of charging and the car is operating in normal working conditions or complex driving conditions, the car drive controller detects the battery energy status and sends a signal to control the flux switching motor to disengage from the first clutch. The flux switching motor is connected to the front wheel drive mechanism of the car through the second clutch. Both the flux switching motor and the permanent magnet synchronous motor absorb electrical energy from the battery to operate as motors. The permanent magnet synchronous motor operates as the motor of the rear wheel drive mechanism of the car, and the flux switching motor assists the permanent magnet synchronous motor in driving.

[0016] The beneficial effects of the present invention are: 1. The radial composite structure motor of the present invention has permanent magnets installed on the first core of the first stator and on the permanent magnet rotor, and the flux switching motor and the permanent magnet synchronous motor share the composite stator core, thereby improving the power density, torque density and driving efficiency of the composite motor.

[0017] 2. The salient pole rotor of the radial composite structure motor of the present invention is a salient pole structure without windings and permanent magnets. The salient pole rotor is connected to an internal combustion engine to generate electricity, which can extend the vehicle's endurance. The permanent magnet rotor uses an inner sheath and an outer sheath to fix the second permanent magnet, which can prevent the second permanent magnet from separating from the permanent magnet rotor core and ensure the normal operation of the motor. The flux switching motor and the permanent magnet synchronous motor share a composite stator core, which makes the motor structure compact and suitable for high-speed operation applications.

[0018] 3. The composite structure motor of the present invention is an integration of a flux switching motor and a permanent magnet synchronous motor. The flux switching motor is connected to the internal combustion engine to operate as a generator, and the permanent magnet synchronous motor is connected to the automobile drive mechanism to operate as a motor. The generator mechanism and the drive mechanism can be controlled independently, which reduces the difficulty of the control system, saves the installation space of the drive system, and improves the integration and reliability of the automobile power system.

[0019] 4. The two output ends of the flux switching motor shaft of the composite structure motor of the present invention are respectively connected to the internal combustion engine and the front wheel drive mechanism of the automobile. When the battery pack power reaches the lower limit of charging, the flux switching motor is connected to the internal combustion engine through the first clutch to operate as a generator. When the battery pack power reaches the upper limit of charging, and the automobile is operating in normal working conditions, acceleration, high speed or other various complex driving conditions, the flux switching motor is connected to the front wheel drive mechanism of the automobile through the second clutch, absorbing electric energy from the battery to operate as a motor to assist the permanent magnet synchronous motor to drive more efficiently under various complex conditions, thereby meeting the driving requirements of the automobile under different driving conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a radial composite structure motor in a specific implementation mode 1 of the present invention; Figure 2 This is a schematic diagram of the structure of the second permanent magnet of the radial composite structure motor of the present invention; Figure 3 This is a schematic diagram of the structure of a radial composite structure motor in a second specific implementation mode of the present invention; Figure 4 This is a schematic diagram of a driving system in a third specific implementation mode of the present invention; Figure 5 It is a schematic diagram of a drive system in a fourth specific implementation mode of the present invention.

[0021] Numbers in the figure: 1, composite stator; 2, permanent magnet rotor; 21, rotor core; 22, second permanent magnet; 221, NdFeB permanent magnet; 222, composite permanent magnet; 2221, NdFeB; 2222, ferrite; 3, salient pole rotor; 4, first salient pole; 5, first stator; 51, first stator core; 52, first stator winding; 6, second stator; 61, second stator core; 62, second stator winding; 7, first core; 8, first permanent magnet ; 9. second iron core; 10. inner sheath; 11. outer sheath; 12. flux switching motor; 13. permanent magnet synchronous motor; 14. drive controller; 15. battery; 16. first inverter; 17. first DC-DC device; 18. second inverter; 19. second DC-DC device; 20. first clutch; 21. second clutch; 22. front wheel drive mechanism of the vehicle; 23. rear wheel drive mechanism of the vehicle; 24. internal combustion engine; 25. magnetic isolation ring. DETAILED DESCRIPTION

[0022] In order to make the present invention clearer and more understandable, the technical solution of the present invention is further described in detail below in combination with the accompanying drawings and embodiments. It should be understood that the given embodiment is only one of the implementation methods and does not represent all embodiments.

[0023] In this article, the terms "inside" and "outside" are established based on the positional relationship shown in the drawings. Depending on the different drawings, the corresponding positional relationship may also change accordingly. Therefore, they cannot be understood as an absolute limitation on the scope of protection. Specific implementation method 1 Combined with Figure 1 -Attached Figure 2Description: A radial composite structure motor provided in a specific embodiment of the present invention includes a composite stator 1, a permanent magnet rotor 2 and a salient pole rotor 3. The composite stator 1 is located between the permanent magnet rotor 2 and the salient pole rotor 3. The salient pole rotor 3 is provided with a plurality of first salient poles 4 distributed along the circumferential direction on a side close to the composite stator 1. The composite stator 1 includes a composite stator 1 core and a magnetic isolation ring 25. The composite stator 1 core is separated by the magnetic isolation ring 25 into a second stator 6 and a first stator 5 arranged radially, that is, the first stator core 51 and the second stator core 61 are an integrated structure. The first stator core 51 and the second stator core 61 are formed by separating the composite stator 1 core through the magnetic isolation ring 25. The first stator 5 includes a first stator core 51. and a plurality of first stator windings 52, a plurality of first cores 7 and first permanent magnets 8 distributed circumferentially are provided on the side of the first stator core 51 close to the salient pole rotor 3, the first permanent magnet 8 is arranged between two adjacent first cores 7, each of the first stator windings 52 is arranged on the first permanent magnet 8 and its adjacent first core 7, the second stator 6 includes a second stator core 61 and a second stator winding 62, a plurality of second cores 9 distributed circumferentially are provided on the second stator core 61, and a second stator winding 62 is provided on each second core 9, the permanent magnet rotor 2 includes a rotor core 21 and a plurality of second permanent magnets 22 distributed circumferentially, the second permanent magnets 22 are arranged on the rotor core 21. The permanent magnet rotor 2 , the second stator 6 , the magnetic isolation ring 25 , the first stator 5 and the salient pole rotor 3 are arranged in sequence from outside to inside along the radial direction of the motor.

[0025] Specifically, a rotor inner sheath 10 is provided on the side of the rotor core 21 close to the second stator 6, and a rotor outer sheath 11 is provided on the side of the rotor core 21 away from the second stator 6. The inner sheath 10 and the outer sheath 11 cover the second permanent magnet 22, and the inner sheath 10 and the outer sheath 11 can protect and fix the second permanent magnet 22 to prevent the second permanent magnet 22 from detaching from the rotor core 21 when the permanent magnet rotor 2 rotates. The second permanent magnet 22 is installed in the following manner: an installation groove is provided on the rotor core 21, and the second permanent magnet 22 is inserted into the installation groove.

[0026] Specifically, the second permanent magnet 22 includes a NdFeB permanent magnet 221 and two composite permanent magnets 222. The two composite permanent magnets 222 are respectively located on both sides of the NdFeB permanent magnet and are symmetrically arranged. The length direction of the NdFeB permanent magnet is perpendicular to the axial direction of the rotor core 21. The materials of the two ends of the length direction of the composite permanent magnet 222 are NdFeB 2221 and ferrite 2222 respectively. One end of the composite permanent magnet 222 made of NdFeB 2221 is inclined toward the NdFeB permanent magnet 221, and one end of the composite permanent magnet 222 made of NdFeB 2221 is far away from the second stator 6, and one end of the composite permanent magnet 222 made of ferrite 2222 is close to the second stator 6. An air gap is provided between the second stator 6 and the permanent magnet rotor 2, and a magnetic isolation bridge is provided between adjacent NdFeB permanent magnets 221. The arrangement of the second permanent magnet 22 has a magnetic field focusing effect and can enhance the permanent magnetic field.

[0027] Specifically, the salient pole rotor 3 and the first salient poles 4 are both made of magnetic conductive materials, the salient pole rotor 3 and the first salient poles 4 are integrally formed, and the number of the first salient poles 4 is ten.

[0028] Specifically, the first iron core 7 is in an inverted U shape, and the first permanent magnet 8 is installed between two inverted U-shaped first iron cores 7 to form a first stator armature tooth, that is, the first iron core 7 includes two iron cores that are arranged at intervals and extend radially toward the salient pole rotor 3. The two iron cores form an inverted U shape on the first stator iron core 51, and the first permanent magnet 8 is arranged between two adjacent first iron cores 7. The number of the first stator armature teeth is 12, and the first stator winding 52 is a concentrated winding form installed on the first stator armature teeth.

[0029] Specifically, the first permanent magnet 8 is a built-in rectangular structure, that is, the first permanent magnet 8 is a cuboid structure arranged in the first core 7, the first permanent magnet 8 is tangentially magnetized, and the magnetization directions of two adjacent first permanent magnets 8 are opposite, and the material of the first permanent magnet 8 is neodymium iron boron. Specific implementation method 2 Combined with Figure 3 It is explained that a radial composite structure motor is provided in the second specific embodiment of the present invention. The basic structural properties of the radial composite structure motor in this specific embodiment are consistent with those of the radial composite structure motor in the first specific embodiment. The difference is that the permanent magnet rotor 2, the second stator 6, the magnetic isolation ring 25, the first stator 5 and the salient pole rotor 3 in this specific embodiment are arranged in sequence from the inside to the outside along the radial direction of the motor. Specific implementation method three Combined with Figure 4Description: A drive system provided in a third specific embodiment of the present invention includes a drive controller 14, a battery 15, a first inverter 16, a first DC-DC (direct current-direct current) device 17, a second inverter 18 and a second DC-DC device 19. The salient pole rotor 3 in the radial composite structure motor and the first stator 5 form a flux switching motor 12, the second stator 6 and the permanent magnet rotor 2 form a permanent magnet synchronous motor 13, the first stator winding 52 is connected to the first DC-DC device 17 through the first inverter 16, and the second stator winding 62 is connected to the second DC-DC device 19 through the second inverter 18. The battery 15 is connected to the first DC-DC device 17 and the second DC-DC device 19 respectively, one end of the output shaft of the salient pole rotor 3 is connected to the internal combustion engine 24, the permanent magnet rotor 2 is connected to the rear wheel drive mechanism 23 of the vehicle, and the drive controller 14 is connected to the front wheel drive mechanism 22 of the vehicle, the rear wheel drive mechanism 23 of the vehicle, the battery 15 and the internal combustion engine 24 respectively. The drive controller 14 controls the normal operation of the front-wheel drive mechanism 22 , the rear-wheel drive mechanism 23 and the internal combustion engine 24 , and is used to monitor the power status of the battery 15 .

[0032] The working method comprises the following steps: the flux switching motor 12 is connected to the internal combustion engine 24 to operate as a generator, and the generated electric energy is stored in the battery 15 through the first inverter 16 and the first DC-DC device 17; The battery 15 supplies power to the permanent magnet synchronous motor via the second inverter 18 and the second DC-DC device 19 , and the permanent magnet synchronous motor operates as the motor of the rear wheel drive mechanism 23 of the vehicle.

[0033] In this specific embodiment, the flux switching motor 12 is only connected to the internal combustion engine 24 and is only used as a generator, and the permanent magnet synchronous motor 13 operates as a drive motor. The electric vehicle using this specific embodiment is a hybrid extended-range electric vehicle. Specific implementation method four Combined with Figure 5 It is explained that a drive system provided in the fourth embodiment of the present invention has the same basic structural properties as the drive system in the third embodiment, except that one end of the output shaft of the salient pole rotor 3 is connected to the internal combustion engine 24 through the first clutch 20, and the other end of the output shaft of the salient pole rotor 3 is connected to the front wheel drive mechanism 22 of the automobile through the second clutch 21, the first clutch 20 and the second clutch 21 are not closed at the same time, and the first clutch 20 and the second clutch 21 are both connected to the drive controller 14. The drive controller 14 is also used to control the first clutch 20 and the second clutch 21.

[0035] The working method comprises the following steps: when the electric energy of the battery 15 reaches the lower limit of charging, the vehicle drive controller 14 detects the electric energy of the battery 15 and sends a signal to control the first clutch 20 to close, connect the magnetic flux switching motor 12 and the internal combustion engine 24, at this time the second clutch 21 is released, the front wheel drive mechanism 22 of the vehicle is disengaged from the second clutch 21, the magnetic flux switching motor 12 is connected to the internal combustion engine 24 through the first clutch 20 to operate as a generator, and the generated electric energy is stored in the battery 15 through the first inverter 16 and the first DC-DC device 17; When the power of the battery 15 reaches the upper limit of charging, and the vehicle is running in normal conditions or in acceleration, high speed or other various complex driving conditions, the vehicle drive controller 14 detects the power status of the battery 15 and sends a signal to control the flux switching motor 12 to disengage from the first clutch 20, and the flux switching motor 12 is connected to the front wheel drive mechanism 22 of the vehicle through the second clutch 21, that is, the first clutch 20 is released and the second clutch 21 is closed, the flux switching motor 12 and the permanent magnet synchronous motor both absorb power from the battery 15 to operate as motors, the permanent magnet synchronous motor operates as the motor of the rear wheel drive mechanism 23 of the vehicle, and the flux switching motor 12 assists the permanent magnet synchronous motor to drive more efficiently.

[0036] While embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A radial composite structure motor, characterized in that: The invention comprises a composite stator (1), a permanent magnet rotor (2) and a salient pole rotor (3), wherein the composite stator (1) is located between the permanent magnet rotor (2) and the salient pole rotor (3), a side of the salient pole rotor (3) close to the composite stator (1) is provided with a plurality of first salient poles (4) distributed in the circumferential direction, the composite stator (1) comprises a composite stator core and a magnetic isolation ring (25), the composite stator core is divided into a second stator (6) and a first stator (5) arranged in the radial direction by the magnetic isolation ring (25), the first stator (5) comprises a first stator core (51) and a plurality of first stator windings (52), a side of the first stator core (51) close to the salient pole rotor (3) is provided with a plurality of first stator windings (52) distributed in the circumferential direction, The invention relates to a stator comprising a first permanent magnet (52) and a rotor core (7), wherein the first permanent magnet (8) is arranged between two adjacent first iron cores (7), each of the first stator windings (52) is arranged on the first permanent magnet (8) and its adjacent first iron core (7), the second stator (6) comprises a second stator iron core (61) and a second stator winding (62), a plurality of second iron cores (9) distributed along the circumferential direction are arranged on the second stator iron core (61), and each of the second iron cores (9) is provided with a second stator winding (62), and the permanent magnet rotor (2) comprises a rotor iron core (21) and a plurality of second permanent magnets (22) distributed along the circumferential direction, and the second permanent magnets (22) are arranged on the rotor iron core (21).

2. The radial composite structure motor according to claim 1, characterized in that: A rotor inner sleeve (10) is provided on a side of the rotor core (21) close to the second stator (6), and a rotor outer sleeve (11) is provided on a side of the rotor core (21) away from the second stator (6), wherein the inner sleeve (10) and the outer sleeve (11) cover the second permanent magnet (22).

3. The radial composite structure motor according to claim 1, characterized in that: The second permanent magnet (22) comprises a neodymium iron boron permanent magnet (221) and two composite permanent magnets (222), the two composite permanent magnets (222) being located on both sides of the neodymium iron boron permanent magnet (221) and symmetrically arranged, the length direction of the neodymium iron boron permanent magnet (221) being perpendicular to the axis direction of the rotor core (21), and the materials of the two ends of the length direction of the composite permanent magnet (222) being neodymium iron boron (2221) and iron. The composite permanent magnet (222) is made of a ferrite (2222), one end of the composite permanent magnet (222) made of a neodymium iron boron (2221) is inclined toward the neodymium iron boron permanent magnet (221), and one end of the composite permanent magnet (222) made of a neodymium iron boron (2221) is away from the second stator (6), and one end of the composite permanent magnet (222) made of a ferrite (2222) is close to the second stator (6), and a magnetic isolation bridge is provided between adjacent neodymium iron boron permanent magnets (221).

4. The radial composite structure motor according to claim 1, characterized in that: The salient pole rotor (3) and the first salient poles (4) are both made of magnetically conductive materials; the salient pole rotor (3) and the first salient poles (4) are integrally formed; and the number of the first salient poles (4) is ten.

5. The radial composite structure motor according to claim 4, characterized in that: The first iron core (7) is in an inverted U shape, the first permanent magnet (8) is mounted between two inverted U-shaped first iron cores (7) to form first stator armature teeth, the number of the first stator armature teeth is 12, and the first stator winding (52) is in the form of a concentrated winding mounted on the first stator armature teeth.

6. A radial composite structure motor according to claim 1 or 5, characterized in that: The first permanent magnet (8) is a built-in rectangular structure, the first permanent magnet (8) is tangentially magnetized, and the magnetization directions of two adjacent first permanent magnets (8) are opposite, and the material of the first permanent magnet (8) is neodymium iron boron.

7. A drive system using the radial composite structure motor according to claim 1, characterized in that: The invention comprises a drive controller (14), a battery (15), a first inverter (16), a first DC-DC device (17), a second inverter (18) and a second DC-DC device (19); the first stator (5) and a salient pole rotor (3) form a flux switching motor (12); the second stator and a permanent magnet rotor (2) form a permanent magnet synchronous motor (13); the first stator winding (52) is connected to the first DC-DC device (17) via the first inverter (16); the second stator winding (62) is connected to the first DC-DC device (17) via the first inverter (16); and the second stator winding (62) is connected to the first DC-DC device (17) via the first inverter (16). The second inverter (18) is connected to the second DC-DC device (19), the battery (15) is connected to the first DC-DC device (17) and the second DC-DC device (19), one end of the output shaft of the salient pole rotor (3) is connected to the internal combustion engine (24), the permanent magnet rotor (2) is connected to the rear wheel drive mechanism (23) of the vehicle, and the drive controller (14) is connected to the front wheel drive mechanism (22) of the vehicle, the rear wheel drive mechanism (23) of the vehicle, the battery (15) and the internal combustion engine (24).

8. A driving system according to claim 7, characterized in that: One end of the output shaft of the salient pole rotor (3) is connected to the internal combustion engine (24) via a first clutch (20), and the other end of the output shaft of the salient pole rotor (3) is connected to the front wheel drive mechanism (22) of the vehicle via a second clutch (21). The first clutch (20) and the second clutch (21) are not closed at the same time, and both the first clutch (20) and the second clutch (21) are connected to a drive controller (14).

9. A method for operating a drive system according to claim 8, characterized in that: The following steps are involved: The flux switching motor (12) is connected to the internal combustion engine (24) to operate as a generator, and the generated electrical energy is stored in the battery (15) through the first inverter (16) and the first DC-DC device (17); The battery (15) supplies power to the permanent magnet synchronous motor (13) via a second inverter (18) and a second DC-DC device (19), and the permanent magnet synchronous motor (13) operates as a motor of a rear wheel drive mechanism (23) of the vehicle.

10. A working method of a driving system according to claim 9, characterized in that: The following steps are involved: When the electric energy of the battery (15) reaches the lower limit of charging, the vehicle drive controller (14) detects the electric energy of the battery (15) and sends a signal to control the first clutch (20) to connect the magnetic flux switching motor (12) and the internal combustion engine (24), and the front wheel drive mechanism (22) of the vehicle is disengaged from the second clutch (21). At this time, the magnetic flux switching motor (12) is connected to the internal combustion engine (24) through the first clutch (20) to operate as a generator, and the generated electric energy is stored in the battery (15) through the first inverter (16) and the first DC-DC device (17); When the electric energy of the battery (15) reaches the upper limit of charging, and the vehicle is operating in a normal operating condition or a complex driving condition, the vehicle drive controller (14) detects the electric energy of the battery (15) and sends a signal to control the magnetic flux switching motor (12) to disengage from the first clutch (20), the magnetic flux switching motor (12) is connected to the front wheel drive mechanism (22) of the vehicle through the second clutch (21), the magnetic flux switching motor (12) and the permanent magnet synchronous motor (13) both absorb electric energy from the battery (15) to operate as motors, the permanent magnet synchronous motor (13) operates as the motor of the rear wheel drive mechanism (23), and the magnetic flux switching motor (12) assists the permanent magnet synchronous motor (13) in driving.

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