Double-layer iron core transverse flux motor and transformer integrated equipment

Abstract

The invention relates to a double-layer iron core transverse magnetic flux motor and transformer integrated device, which comprises a stator assembly comprising an inner stator, an outer stator and armature windings wound on the inner stator and the outer stator respectively, the inner stator and the outer stator are coaxially arranged, and the inner stator and the outer stator respectively comprise a plurality of groups of U-shaped iron cores and permanent magnets; the rotor assembly is coaxially arranged between the inner stator and the outer stator, two rows of rotor teeth are arranged inside and outside the rotor assembly in the circumferential direction respectively, and the two rows of rotor teeth are distributed in a staggered mode. By means of the structural design of the double-layer iron core transverse magnetic flux switching motor, large power output is provided in a small size, the motor is reconstructed into an efficient transformer, electric energy transmission is achieved, extra assemblies and cost are reduced, the manufacturing cost of a system is reduced, the weight of an automobile is reduced, and the service life of the automobile is prolonged. And the energy efficiency and the endurance mileage of the electric vehicle can be improved, so that a more efficient and more convenient solution for charging the electric vehicle is provided.

Description

Technical Field

[0001] The present invention relates to the technical field of motor manufacturing, and in particular to a double-layer iron core transverse flux motor and transformer integrated equipment. Background Art

[0002] With the current shortage of fossil fuels and the aggravation of social and environmental pollution, electric vehicles with zero emissions due to the use of clean energy have received more and more attention around the world, which has also put forward higher requirements for various technologies of electric vehicles. Among them, battery charging technology has a profound impact on the charging efficiency of electric vehicles, and motor drive technology is directly related to the user's driving experience. The controllers of both occupy a lot of space inside the electric vehicle and increase the weight of the vehicle. The integrated on-board charging system can achieve convenient and fast on-board charging without adding additional devices by time-sharing and reasonably reconstructing the drive motor windings, which has attracted continuous attention from academia and industry.

[0003] As a new type of electric vehicle charging solution, the integrated on-board charging system integrates a charging device into the electric power transmission system of the electric vehicle, allowing the electric vehicle to be charged while the vehicle is driving or parked. This integrated on-board charging system helps to reduce charging time and improve charging efficiency. Therefore, further development of the integrated on-board charging system and coping with torque pulsation, voltage matching and other problems that occur during use have become a new research and development direction for those skilled in the art, and play a vital role in the development of electric vehicles. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a double-layer iron core transverse flux motor and transformer integrated device.

[0005] The present invention is achieved through the following technical solutions:

[0006] A double-core transverse flux motor and transformer integrated device, comprising:

[0007] The stator assembly comprises an inner stator and an outer stator which are coaxially arranged, and armature windings which are respectively wound on the inner stator and the outer stator, wherein the inner stator and the outer stator respectively comprise a plurality of groups of U-shaped iron cores and permanent magnets;

[0008] The rotor assembly is coaxially arranged between the inner stator and the outer stator. Two rows of rotor teeth are arranged inside and outside the rotor assembly along the circumferential direction respectively, and the two rows of rotor teeth are staggered.

[0009] According to the above technical solution, preferably, the double-layer iron core transverse flux motor and transformer integrated device has a driving mode and a charging mode. In the driving mode, the inner stator and the outer stator work together to drive the rotor assembly to rotate. In the charging mode, the inner stator and the outer stator work together to reconstruct into a transformer to charge the battery pack.

[0010] According to the above technical solution, preferably, each of the permanent magnets is placed between two adjacent U-shaped cores, and the two adjacent permanent magnets are magnetized along the tangential direction with opposite magnetization directions.

[0011] According to the above technical solution, preferably, the permanent magnets include U-shaped permanent magnets and I-shaped permanent magnets, and the U-shaped permanent magnets and I-shaped permanent magnets are alternately arranged along the circumferential direction so that the armature winding is wound between two adjacent I-shaped permanent magnets.

[0012] According to the above technical solution, preferably, two rows of rotor teeth are arranged inside and outside the rotor assembly along the circumferential direction respectively, and the two rows of rotor teeth are staggered and spatially differ by 25.71°.

[0013] According to the above technical solution, preferably, the outer stator and the inner stator are each provided with 12 U-shaped iron cores and 12 permanent magnets, the total number of the rotor teeth is set to 28, and the inner and outer sides of the rotor assembly are each provided with two rows of rotor teeth, each row has 7 rotor teeth, which are spatially staggered along the circumference and differ in space by 25.71°.

[0014] According to the above technical solution, preferably, the U-shaped core and the rotor assembly are made of silicon steel sheets or amorphous alloy materials, and the permanent magnets are made of neodymium iron boron, samarium cobalt or ferrite permanent magnet materials.

[0015] According to the above technical solution, preferably, the armature winding adopts a concentrated winding structure to form four sets of three-phase windings.

[0016] According to the above technical solution, preferably, the armature winding includes three-phase windings, namely, an A-phase winding, a B-phase winding and a C-phase winding, and the three-phase windings are spatially spaced at an electrical angle of 120°.

[0017] The beneficial effects of the present invention are:

[0018] Due to the structural design of the double-layer iron core transverse flux switching motor, the present invention can achieve higher torque density and power density, reduce magnetic field leakage, and reduce electromagnetic interference to the external environment, providing a larger power output in a relatively small volume, further meeting the requirements of lightweight and convenient integrated vehicle charging system;

[0019] At the same time, independent armature windings are wound on the inner and outer stators of the motor, which can be operated individually or in series. The windings of the outer stator are connected in series as low-voltage windings, and the windings of the inner stator are connected in series as high-voltage windings. Since the high- and low-voltage side windings are coupled by magnetic flux, electrical isolation is ensured, which improves the safety of the vehicle system. By reconstructing the motor into an efficient transformer, the transmission of electric energy is achieved, reducing additional components and costs, thereby providing a more efficient and convenient electric vehicle charging solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the stator core assembly part of the present invention.

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the rotor assembly part of the present invention.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the permanent magnet part of the present invention.

[0024] Figure 5 It is a schematic diagram of the winding distribution of the stator component part of the present invention.

[0025] Figure 6 This is a working principle diagram of the motor of the present invention when operating in a driving mode.

[0026] Figure 7 This is a working principle diagram of the motor of the present invention when operating in charging mode.

[0027] In the figure: 1. outer stator; 2. inner stator; 3. U-shaped iron core; 4. permanent magnet; 5. rotor assembly; 6. rotor teeth; 7. armature winding; 8. permanent magnet teeth; 9. U-shaped permanent magnet; 10. I-shaped permanent magnet. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and the best embodiment. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the invention.

[0029] In the description of the invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the invention.

[0030] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] As shown in the figure, the present invention includes: a stator assembly, including a coaxially arranged inner stator 2, an outer stator 1, and an armature winding 7 wound on the inner stator 2 and the outer stator 1, respectively, wherein the inner stator 2 and the outer stator 1 respectively include a plurality of groups of U-shaped iron cores 3 and permanent magnets 4; a rotor assembly 5, coaxially arranged between the inner stator 2 and the outer stator 1, and having air gaps between the outer stator 1 and the inner stator 2, and two rows of rotor teeth 6 are arranged inside and outside the rotor assembly 5 in the circumferential direction, respectively, and the two rows of rotor teeth 6 are staggered. A double-layer iron core transverse flux motor and transformer integrated device disclosed in the present application adopts a stator permanent magnet structure, has good heat dissipation capacity, high rotor robustness, and due to the double stator structure, has high output torque, and the outer stator 1 and the inner stator 2 are redundant with each other, and have strong fault tolerance, thereby ensuring the safety and continuity of the driving function.

[0032] Among them, each of the permanent magnets 4 is respectively placed between two adjacent U-shaped cores 3. In this example, the magnetic teeth of the two adjacent U-shaped cores 3 and the permanent magnets 4 embedded therein together constitute permanent magnet teeth 8, and the number of permanent magnet teeth 8 of the inner stator 2 is equal to the number of permanent magnet teeth 8 of the outer stator 1. At the same time, in this example, the permanent magnet 4 includes U-shaped permanent magnets 9 and I-shaped permanent magnets 10, and the U-shaped permanent magnets 9 and I-shaped permanent magnets 10 are alternately arranged along the circumferential direction, so that the armature winding 7 is wound between two adjacent I-shaped permanent magnets 10. In addition, the two adjacent permanent magnets 4 are magnetized along the tangential direction, and the magnetization directions are opposite, which can reduce the loss of the magnetic field, make the magnetic field more concentrated, and make it easier for the system to adjust and control the intensity of the magnetic field, simplify the system design, reduce the complexity of the system, and thus improve the reliability of the motor.

[0033] Two rows of rotor teeth 6 are arranged inside and outside the rotor assembly 5 along the circumferential direction, and the number of rotor teeth 6 on the inner and outer sides of the yoke is equal, and the spatial position is the same. The two rows of rotor teeth 6 are staggered and differ by 25.71° in space. Specifically, in this example, the outer stator 1 and the inner stator 2 are preferably provided with 12 U-shaped cores 3 and 12 permanent magnets 4, and the total number of rotor teeth 6 is preferably 28, and two rows of rotor teeth 6 are arranged on the inner and outer sides of the rotor assembly 5, each row has 7 rotor teeth 6, and are staggered along the circumference in space, and differ by 25.71° in space. Through the staggered arrangement of the rotor teeth 6, the torque pulsation of the motor can be significantly reduced, the power density can be improved, and the motor can run more smoothly. Relying on the principle of magnetic flux switching, the motor generates alternating magnetic flux to offset the back electromotive force even harmonics, and the special slot level matching can suppress the tooth torque and improve the steady-state performance of the motor.

[0034] The U-shaped core 3 and the rotor assembly 5 are made of silicon steel sheets or amorphous alloy materials, and the permanent magnet 4 is made of NdFeB, SmCo or ferrite permanent magnet materials. The permanent magnet 4 and the U-shaped core 3 are alternately spliced ​​along the circumference, which can reduce the inhomogeneity of the magnetic field, improve the conduction efficiency and heat dissipation performance of the magnetic field, and thus improve the efficiency of the system.

[0035] The armature winding 7 adopts a concentrated winding structure to form four sets of three-phase windings. Specifically, the armature winding 7 includes three-phase windings, namely, an A-phase winding, a B-phase winding and a C-phase winding, and the phases are spaced 120° apart in electrical angle. By changing the connection method of the motor armature winding 7, the motor is reconstructed into a transformer. Among the four sets of three-phase windings, the two sets of three-phase windings of the outer stator 1 are connected in series as the low-voltage side windings of the transformer, and the two sets of three-phase windings of the inner stator 2 are connected in series as the high-voltage side windings of the transformer. The integrated design of the double-layer iron core transverse flux switching motor and the transformer in this example simplifies the charging process of the vehicle, reduces the manufacturing cost of the system, reduces the weight of the vehicle, and helps to improve energy efficiency and the cruising range of electric vehicles.

[0036] Therefore, the present application discloses a double-layer iron core transverse flux motor and transformer integrated device, which has a driving mode and a charging mode. In the driving mode, the inner stator 2 and the outer stator 1 work together to drive the rotor assembly 5 to rotate. In the charging mode, the inner stator 2 and the outer stator 1 work together to reconstruct into a transformer to charge the battery pack.

[0037] Working principle of the present invention:

[0038] The double-core transverse flux switching motor can realize the inner and outer motors to work separately or simultaneously, realizing more flexible motor performance adjustment. By reasonably controlling the magnetic field of the inner and outer stators, the motor can achieve high-efficiency operation and adjustable output under different working conditions. The double-core transverse flux motor has two modes: drive mode and charging mode. In the drive mode, as the rotor position changes, an alternating magnetic flux can be generated in the stator coil, thereby generating an alternating back electromotive force, and then an alternating current is passed through the i d =0 control mode can generate output torque; in charging mode, by reconstructing the motor into a transformer, the two sets of three-phase windings on the low-voltage side are connected to the AC power grid, and the two sets of three-phase windings on the high-voltage side cooperate with the inverter to charge the battery pack, achieving efficient charging and simplifying the system design. The special structural characteristics of the double-layer iron core motor allow the problems of voltage matching and torque pulsation to be solved simultaneously without adding additional devices. Different charging strategies can be achieved by flexibly controlling the connection method of the windings. In driving mode, the two stators can work simultaneously or separately according to different working conditions; in charging mode, the two stators work together to achieve energy transfer. The flexibility of this motor structure makes it widely used in different applications.

[0039] The present invention discloses a double-layer iron core transverse flux motor and transformer integrated device. Due to the structural design of the double-layer iron core transverse flux switching motor, it can achieve higher torque density and power density, reduce magnetic field leakage, and reduce electromagnetic interference to the external environment. It provides a larger power output in a relatively small volume, further meeting the requirements of lightweight and convenient integrated on-board charging systems. In addition, one of the ideas for adding electrical isolation function to the integrated on-board charging system is to construct a transformer in the power stage. The inner and outer stators of the motor are surrounded by independent armature windings, which can be operated alone or in series. The windings of the outer stator are connected in series as low-voltage windings, and the windings of the inner stator are connected in series as high-voltage windings. Since the high and low voltage side windings are coupled by magnetic flux, electrical isolation is ensured, which improves the safety of the on-board system. By reconstructing the motor into an efficient transformer, the transmission of electric energy is achieved, and additional components and costs are reduced, thereby providing a more efficient and convenient electric vehicle charging solution.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A double-core transverse flux motor and transformer integrated device, characterized in that: include: A stator assembly comprises a coaxially arranged inner stator (2), an outer stator (1), and an armature winding (7) wound on the inner stator (2) and the outer stator (1), respectively, wherein the inner stator (2) and the outer stator (1) respectively comprise a plurality of groups of U-shaped iron cores (3) and permanent magnets (4); The rotor assembly (5) is coaxially arranged between the inner stator (2) and the outer stator (1), and two rows of rotor teeth (6) are arranged inside and outside the rotor assembly (5) along the circumferential direction, respectively, and the two rows of rotor teeth (6) are staggered.

2. The double-core transverse flux motor and transformer integrated device according to claim 1, characterized in that: The double-core transverse flux motor and transformer integrated device has a driving mode and a charging mode. In the driving mode, the inner stator (2) and the outer stator (1) work together to drive the rotor assembly (5) to rotate. In the charging mode, the inner stator (2) and the outer stator (1) work together to be reconfigured into a transformer to charge the battery pack.

3. The double-core transverse flux motor and transformer integrated device according to claim 1, characterized in that: Each of the permanent magnets (4) is placed between two adjacent U-shaped cores (3). Furthermore, two adjacent permanent magnets (4) are magnetized along the tangential direction, and the magnetization directions are opposite.

4. The double-core transverse flux motor and transformer integrated device according to claim 3, characterized in that: The permanent magnet (4) comprises a U-shaped permanent magnet (9) and an I-shaped permanent magnet (10). Furthermore, the U-shaped permanent magnets (9) and the I-shaped permanent magnets (10) are alternately arranged along the circumferential direction, so that the armature winding (7) is wound between two adjacent I-shaped permanent magnets (10).

5. The double-core transverse flux motor and transformer integrated device according to claim 4, characterized in that: Two rows of rotor teeth (6) are arranged inside and outside the rotor assembly (5) along the circumferential direction respectively, and the two rows of rotor teeth (6) are staggered and spaced 25.71 degrees apart.

6. The double-core transverse flux motor and transformer integrated device according to claim 5, characterized in that: The outer stator (1) and the inner stator (2) are each provided with 12 U-shaped iron cores (3) and 12 permanent magnets (4). The total number of the rotor teeth (6) is 28, and two rows of rotor teeth (6) are provided on the inner side and the outer side of the rotor assembly (5), each row having 7 rotor teeth (6), which are spatially staggered along the circumference and have a spatial difference of 25.71°.

7. The double-core transverse flux machine and transformer integrated device according to any one of claims 1 to 6, characterized in that: The U-shaped iron core (3) and the rotor assembly (5) are made of silicon steel sheets or amorphous alloy materials, and the permanent magnet (4) is made of neodymium iron boron, samarium cobalt or ferrite permanent magnet material.

8. The double-core transverse flux motor and transformer integrated device according to claim 6, characterized in that: The armature winding (7) adopts a concentrated winding structure to form four sets of three-phase windings.

9. The double-core transverse flux motor and transformer integrated device according to claim 8, characterized in that: The armature winding (7) comprises three-phase windings, namely, an A-phase winding, a B-phase winding and a C-phase winding, and the phases of the three-phase windings are spaced apart by an electrical angle of 120°.

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