Mechanical flux-adjusting stator separation type transformer

Abstract

The invention provides a mechanical flux-adjusting stator separation type transformer. The mechanical flux-adjusting stator separation type transformer comprises a first stator assembly, a second stator assembly, a first rotor and a second rotor, a first air gap is formed between the first rotor and the first stator assembly; a second air gap is formed between the second rotor and the second stator assembly. The first stator assembly comprises a plurality of U-shaped iron cores and a plurality of permanent magnets which are respectively arranged in gaps among the U-shaped iron cores; the second stator assembly comprises a plurality of stator teeth which are in one-to-one correspondence with the U-shaped iron cores or the permanent magnets. When the central lines of the U-shaped iron cores and the central lines of the stator teeth are in one-to-one correspondence and coincide, the permanent magnet generates two first permanent magnet linkages. When the center lines of the permanent magnets and the stator teeth are in one-to-one correspondence and coincide, the permanent magnets generate a first permanent magnet flux linkage and a second permanent magnet flux linkage. The invention provides a mechanical magnetic adjustment stator separation type transformer, and aims to solve the problem that an iron core magnetic field of a traditional motor-transformer integrated product cannot be adjusted in the prior art.

Description

Technical Field

[0001] This invention belongs to the field of transformer manufacturing technology, specifically relating to a mechanically adjustable stator-separated transformer. Background Technology

[0002] With the rapid development of science and technology and the economy, applications requiring precise control (such as robots, automated production lines, and wind turbines) necessitate motors that can quickly and accurately adjust their speed to adapt to different operational demands. Furthermore, integrated on-board charging systems that reuse motor drivers as chargers have gained widespread attention from academia and industry in recent years. This innovative design reconfigures the topology and control strategy of the motor drive system, allowing it to function as a motor driver while the vehicle is in motion, and then be reconfigured as a high-performance on-board charger in charging mode, thus achieving efficient reuse of hardware resources. This conversion between motor and charger utilizes existing hardware such as motor windings and inverters, and through specific switching network reconfiguration, transforms a three-phase motor into a transformer with electrical isolation. This reconfiguration not only significantly reduces the additional components required by traditional standalone chargers, lowering system cost and size, but more importantly, it achieves electrical isolation between the primary and secondary sides through magnetic coupling, effectively avoiding the risk of leakage during charging and greatly enhancing system safety.

[0003] In existing technologies, traditional integrated motor-transformer products have non-adjustable core magnetic fields, which affects the speed range of the motor and limits the saturation of the transformer's magnetic field, resulting in poor practicality. Summary of the Invention

[0004] This invention provides a mechanically adjustable stator-separated transformer, which aims to solve the problem of the non-adjustable core magnetic field in traditional integrated motor-transformer products.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A mechanically adjustable stator-separated transformer is provided, comprising a first stator assembly, a second stator assembly, a first rotor corresponding to the first stator assembly, and a second rotor corresponding to the second stator assembly; a first air gap is formed between the first rotor and the first stator assembly; a second air gap is formed between the second rotor and the second stator assembly; wherein the first stator assembly comprises a plurality of U-shaped iron cores arranged in a ring-like interval and a plurality of permanent magnets respectively disposed in the gaps between each of the U-shaped iron cores; the second stator assembly comprises a plurality of stator teeth that correspond one-to-one with each of the U-shaped iron cores or each of the permanent magnets; When the center lines of each U-shaped iron core and each stator tooth correspond one-to-one and coincide, the permanent magnet generates two first permanent magnet chains that are connected in parallel and pass through the first air gap and the second air gap respectively; when the center lines of each permanent magnet and each stator tooth correspond one-to-one and coincide, the permanent magnet generates a first permanent magnet chain and a second permanent magnet chain, and the second permanent magnet chain is connected in parallel with the first permanent magnet chain.

[0006] In one possible implementation, the second stator component further includes: The stator tuning magnet core has each of the aforementioned stator teeth; A magnet adjustment module is located between the first stator assembly and the stator magnet core.

[0007] In one possible implementation, the magnetizing module includes multiple magnetizing blocks, each of which is configured to correspond one-to-one with each of the stator teeth.

[0008] In one possible implementation, any two adjacent permanent magnets are tangentially magnetized in opposite directions.

[0009] In one possible implementation, the mechanically adjustable stator-separated transformer further includes multiple armature windings, each armature winding being wound on each of the U-shaped iron cores; each armature winding is wound on two adjacent U-shaped iron cores, connecting the two adjacent U-shaped iron cores.

[0010] In one possible implementation, the armature windings form a three-phase winding, with an angle of 120° between any two adjacent phases.

[0011] In one possible implementation, the number of U-shaped iron cores is 24, and the number of permanent magnets is 24.

[0012] In one possible implementation, the number of stator teeth is 24.

[0013] In one possible implementation, the permanent magnet is made of neodymium iron boron material.

[0014] In one possible implementation, each of the U-shaped iron cores and each of the stator teeth are made of silicon steel sheets.

[0015] The beneficial effects of the mechanically adjustable stator-separated transformer provided by this invention are as follows: Compared with the prior art, when the center lines of each U-shaped iron core and each stator tooth correspond one-to-one and coincide, the permanent magnet generates two first permanent magnet chains. These two first permanent magnet chains are connected in parallel. One of the first permanent magnet chains passes through the U-shaped iron core, exits the first air gap, passes through the first rotor, enters the first air gap, and closes at the U-shaped iron core, forming a closed magnetic circuit. The other first permanent magnet chain passes through the stator teeth in the second stator assembly, exits the second air gap, passes through the second rotor, enters the second air gap, and closes at the stator teeth, forming a closed magnetic circuit. The two closed magnetic circuits are connected in parallel and decoupled from each other (decoupling refers to using a certain method or technique to make systems, modules, variables, or processes that are originally interdependent or tightly coupled independent of each other, reducing or eliminating their direct correlation, thereby improving the system's flexibility, maintainability, and scalability). As the first and second rotors rotate, electromagnetic torque is generated when current is applied.

[0016] When the centerlines of each permanent magnet correspond and coincide with the centerlines of each stator tooth, the permanent magnets generate a first permanent magnet flux linkage and a second permanent magnet flux linkage. The second permanent magnet flux linkage is connected in parallel with the first permanent magnet flux linkage. The first permanent magnet flux linkage passes through the U-shaped iron core, exits the first air gap, passes through the first rotor, enters the first air gap again, and closes in the U-shaped iron core, forming a closed magnetic circuit. The second permanent magnet flux linkage passes through the second stator assembly, passes through the U-shaped iron core, and closes in the second stator assembly, forming a closed magnetic circuit. The second permanent magnet flux linkage generated by the permanent magnets closes in the stator teeth of the second stator assembly and no longer passes through the second air gap. The second permanent magnet flux linkage descends, increasing the speed regulation range, which is suitable for applications involving field weakening speed regulation. Attached Figure Description

[0017] Figure 1 A schematic diagram of a mechanically adjustable stator-separated transformer provided in this embodiment of the invention. Figure 1 ; Figure 2 A schematic diagram of a mechanically adjustable stator-separated transformer provided in this embodiment of the invention. Figure 2 ; Figure 3 This is a schematic diagram of the fixing structure of a mechanically adjustable stator-separated transformer provided in an embodiment of the present invention; Figure 4 A schematic diagram of two parallel first permanent magnet flux linkages in a mechanically adjustable stator-separated transformer provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the parallel connection of the first permanent magnet flux linkage and the second permanent magnet flux linkage in a mechanically adjustable stator-separated transformer, provided as an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 10. First stator assembly; 11. U-shaped iron core; 12. Permanent magnet; 20. Second stator assembly; 21. Stator adjusting magnet core; 22. Adjusting magnet module; 30. First rotor; 40. Second rotor; 50. Armature winding; 60. Fixing structure; 61. Fixing ring; 62. Snap-fit ​​block; 70. First air gap; 80. Second air gap. Detailed Implementation

[0019] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0020] It should be noted that the terms "length", "width", "height", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", and "tail" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0021] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0023] Please refer to the following: Figures 1 to 5The present invention will now describe a mechanically adjustable stator-separated transformer. This mechanically adjustable stator-separated transformer includes a first stator assembly 10, a second stator assembly 20, a first rotor 30 corresponding to the first stator assembly 10, and a second rotor 40 corresponding to the second stator assembly 20. A first air gap 70 is formed between the first rotor 30 and the first stator assembly 10. A second air gap 80 is formed between the second rotor 40 and the second stator assembly 20. The first stator assembly 10 includes a plurality of U-shaped iron cores 11 and a plurality of permanent magnets 12. The U-shaped iron cores 11 are arranged in a ring-shaped interval, and the permanent magnets 12 are respectively disposed in the intervals between the U-shaped iron cores 11. The second stator assembly 20 includes a plurality of stator teeth, each stator tooth corresponding one-to-one with each U-shaped iron core 11 or each permanent magnet 12. When the center lines of each U-shaped iron core 11 correspond and coincide with the center lines of each stator tooth, the permanent magnet 12 generates two first permanent magnet chains. The two first permanent magnet chains are arranged in parallel, with one of the first permanent magnet chains passing through the first air gap 70 and the other passing through the second air gap 80. When the center lines of each permanent magnet 12 correspond and coincide with the center lines of each stator tooth, the permanent magnet 12 generates a first permanent magnet chain and a second permanent magnet chain, with the second permanent magnet chain connected in parallel with the first permanent magnet chain.

[0024] In this embodiment, the first stator assembly 10 includes multiple U-shaped iron cores 11 and multiple permanent magnets 12. The U-shaped iron cores are arranged in a ring at intervals, and a permanent magnet 12 is disposed between any two adjacent U-shaped iron cores 11. The second stator assembly 20 includes multiple stator teeth that correspond one-to-one with each U-shaped iron core. The first rotor 30 is disposed corresponding to the first stator assembly 10, and a first air gap 70 is provided between the first rotor 30 and the first stator assembly 10. The second rotor 40 is disposed corresponding to the second stator assembly 20, and a second air gap 80 is provided between the second rotor 40 and the second stator assembly 20.

[0025] When the center lines of each U-shaped iron core 11 correspond and coincide with the center lines of each stator tooth, the permanent magnet 12 generates two first permanent magnet chains. The two first permanent magnet chains are arranged in parallel, and one of the first permanent magnet chains passes through the U-shaped iron core 11, exits through the first air gap 70, passes through the first rotor 30, enters through the first air gap 70, and closes at the U-shaped iron core 11, forming a closed magnetic circuit. The other first permanent magnet chain passes through the stator teeth in the second stator assembly 20, exits through the second air gap 80, passes through the second rotor 40, enters through the second air gap 80, and closes at the stator teeth, forming a closed magnetic circuit.

[0026] When the center lines of each permanent magnet 12 correspond and coincide with the center lines of each stator tooth, the permanent magnet 12 generates a first permanent magnet flux linkage and a second permanent magnet flux linkage. The second permanent magnet flux linkage is connected in parallel with the first permanent magnet flux linkage. The first permanent magnet flux linkage passes through the U-shaped iron core 11, exits the first air gap 70, passes through the first rotor 30, enters the first air gap 70, and closes at the U-shaped iron core 11, forming a closed magnetic circuit. The second permanent magnet flux linkage passes through the second stator assembly 20, passes through the U-shaped iron core 11, and closes at the second stator assembly 20, forming a closed magnetic circuit.

[0027] Specifically, the air gap refers to the air gap between the stator and rotor (or between different iron core sections in the magnetic circuit) in a motor or transformer. It is an important component of the magnetic circuit and directly affects the electromagnetic performance, efficiency, and mechanical characteristics of the motor.

[0028] This invention provides a mechanically adjustable stator-separated transformer. Compared with the prior art, when the center lines of each U-shaped iron core 11 correspond and coincide with the center lines of each stator tooth, the permanent magnet 12 generates two first permanent magnet chains. These two first permanent magnet chains are connected in parallel. One of the first permanent magnet chains passes through the U-shaped iron core 11, exits through the first air gap 70, passes through the first rotor 30, and enters the first air gap 70 again, closing at the U-shaped iron core 11 to form a closed magnetic circuit. The other first permanent magnet chain passes through the stator teeth in the second stator assembly 20, exits through the second air gap 80, passes through the second rotor 40, and enters the second air gap 80 again, closing at the stator teeth to form a closed magnetic circuit. The two closed magnetic circuits are connected in parallel and decoupled from each other (decoupling refers to using a method or technique to make systems, modules, variables, or processes that are originally interdependent or tightly coupled independent of each other, reducing or eliminating their direct correlation, thereby improving the system's flexibility, maintainability, and scalability). As the first rotor 30 and the second rotor 40 rotate, electromagnetic torque is generated when current is applied.

[0029] When the center lines of each permanent magnet 12 correspond and coincide with the center lines of each stator tooth, the permanent magnet 12 generates a first permanent magnet flux linkage and a second permanent magnet flux linkage. The second permanent magnet flux linkage is connected in parallel with the first permanent magnet flux linkage. The first permanent magnet flux linkage passes through the U-shaped iron core 11, exits the first air gap 70, passes through the first rotor 30, enters the first air gap 70, and closes at the U-shaped iron core 11, forming a closed magnetic circuit. The second permanent magnet flux linkage passes through the second stator assembly 20, passes through the U-shaped iron core 11, and closes at the second stator assembly 20, forming a closed magnetic circuit. The second permanent magnet flux linkage generated by the permanent magnet 12 closes at the stator teeth in the second stator assembly 20 and no longer passes through the second air gap 80. The second permanent magnet flux linkage descends, increasing the speed regulation range, which is suitable for applications involving field weakening speed regulation.

[0030] In some embodiments, please refer to Figure 1 and Figure 2The second stator assembly 20 also includes a stator adjusting magnet core 21 and a magnet adjusting module 22. The stator adjusting magnet core 21 has stator teeth. The magnet adjusting module 22 is located between the first stator assembly 10 and the stator adjusting magnet core 21. In this embodiment, the magnet adjusting module 22 is located between the first stator assembly 10 and the stator adjusting magnet core 21. The magnet adjusting module 22 can directly adjust the magnetic flux density inside the U-shaped iron core 11 and the stator adjusting magnet core 21, thereby changing the operating characteristics when operating as a motor or transformer, without increasing losses or reducing efficiency. Specifically, magnetic flux density is short for magnetic induction intensity, also known as magnetic flux density, which represents the number of magnetic field lines perpendicularly passing through a unit area, and is used to quantify the strength and distribution of the magnetic field.

[0031] Furthermore, the stator tuning magnet core 21 has a salient pole structure (a salient pole structure refers to a rotor or stator magnetic pole of a motor that protrudes significantly, forming a clear gap with adjacent magnetic poles. This structure contrasts with the non-salient pole structure, where the magnetic pole surface is relatively smooth and there are no obvious protrusions).

[0032] Furthermore, the magnetizing module 22 is located between the first stator assembly 10 and the second stator assembly 20.

[0033] In some embodiments, please refer to Figure 1 and Figure 2 The magnetic adjustment module 22 includes multiple magnetic adjustment blocks, each corresponding to a stator tooth. In this embodiment, each magnetic adjustment block corresponds to a stator tooth, and each stator tooth corresponds to a U-shaped iron core 11, thereby facilitating direct adjustment of the magnetic flux density inside each U-shaped iron core 11 and improving the reliability and stability of the motor.

[0034] In some embodiments, any two adjacent permanent magnets 12 are tangentially magnetized in opposite directions. In this embodiment, the adjacent permanent magnets 12 are tangentially magnetized, meaning their magnetic fields are in the same direction (both tangential), forming a series magnetic circuit through a magnetic core (such as a rotor core). The magnetic fields are superimposed in the air gap, significantly increasing the air gap magnetic flux density. Tangential magnetization results in a more uniform magnetic field distribution in the air gap, reducing torque pulsation and cogging effects, improving motor operation smoothness, and reducing vibration and noise. When adjacent permanent magnets 12 are magnetized in opposite directions, the N pole of one magnet is adjacent to the S pole of another, forming a closed magnetic circuit. This highly concentrates the magnetic field in the magnet gap, significantly enhancing the local magnetic field strength. In motors or magnetic systems, this arrangement generates a more uniform air gap magnetic field, reducing eddy current losses and improving efficiency. Reverse magnetization concentrates magnetic lines of force between adjacent magnets, reducing outward leakage flux, reducing heat generation caused by local magnetic flux saturation, and extending device lifespan.

[0035] In some embodiments, please refer to Figure 1 and Figure 2 The mechanically adjustable stator-separated transformer provided in this embodiment of the invention further includes multiple armature windings 50, each armature winding 50 being wound on a U-shaped iron core 11; each armature winding 50 is wound on two adjacent U-shaped iron cores 11, connecting the two adjacent U-shaped iron cores 11. In this embodiment, multiple armature windings 50 are provided, each armature winding 50 being wound on two adjacent U-shaped iron cores 11, connecting the two adjacent U-shaped iron cores 11. The armature windings 50 are coils made of insulated wire wound according to a certain pattern, embedded in the slots of the armature iron core, and connected to the external circuit through a commutator (DC motor) or slip ring (AC motor) to realize the mutual conversion of electrical energy and mechanical energy. The armature windings 50 are responsible for inducing electromotive force or generating electromagnetic torque in a magnetic field.

[0036] In some embodiments, please refer to Figure 1 The armature winding 50 constitutes a three-phase winding, with an angle of 120° between any two adjacent phases. In this embodiment, when the angle between any two adjacent phases of the three-phase winding is 120°, the sum of the instantaneous values ​​of the three-phase voltage or current is zero at any given time, allowing power transmission without a neutral wire (when balancing the load). When a current with a 120° phase difference is applied to the three-phase winding, the resulting magnetic field is a magnetic field with constant amplitude and uniform rotation (a circular rotating magnetic field), resulting in smooth motor torque, no pulsation, and high efficiency.

[0037] Furthermore, when each magnetizing block is aligned with the center position of the corresponding armature winding 50, the mechanically magnetized stator-separated transformer operates in a field-weakening mode, and the permanent magnet circuit forms a closed loop between adjacent stator teeth of the stator magnetizing core 21. When each magnetizing block is aligned with the center position of two adjacent armature windings 50, the mechanically magnetized stator-separated transformer operates in a high torque density mode, and the permanent magnet circuit forms a closed loop only within a single stator tooth of the stator magnetizing core 21.

[0038] By adjusting the magnetizing module 22, the permanent magnet circuit flow mode between the first stator assembly 10 and the second stator assembly 20 is changed. At the same time, the magnetizing module 22 is an axial flux structure. The magnetizing module 22, located near the inner diameter of the stator magnetizing core 21, can suppress the saturation effect of the U-shaped iron core 11 of the first stator assembly 10 and the stator magnetizing core 21 in the second stator assembly 20 through the weakening magnetic effect. In addition, by adjusting the axial length of the magnetizing module 22, the slot area of ​​the U-shaped iron core 11 of the first stator assembly 10 is effectively increased, so that the motor can be designed with a larger armature current during the design stage, thereby increasing the torque density of the motor.

[0039] The magnetic flux path generated by the permanent magnet 12 in the first stator assembly 10 is adjusted by the magnetization module 22 and is perpendicular to and opposite in direction to the magnetic flux path in the second stator assembly 20.

[0040] This invention can adjust the permanent magnet field by changing the position of the adjusting block, thereby improving the speed regulation capability of the motor; moreover, the adjusting block does not compete with the permanent magnet 12 for space, which is beneficial to improving the torque density of the motor. Using the adjusting block to achieve mechanical magnetization improves the reliability and stability of the motor, effectively reduces the saturation of the iron core magnetic field when operating as a transformer, and enhances energy conversion efficiency.

[0041] Furthermore, the mechanically adjustable stator-separated transformer disclosed in this invention can be operated as both an electric motor and a transformer, and can be used as a standard component in multiple scenarios, thus having great market application prospects.

[0042] In some embodiments, please refer to Figure 1 and Figure 2 The number of U-shaped iron cores 11 is 24, and the number of permanent magnets 12 is 24.

[0043] In some embodiments, please refer to Figure 1 and Figure 2 The stator teeth number 24. In this embodiment, each stator tooth corresponds one-to-one with each U-shaped iron core 11, therefore the number of stator teeth is 24.

[0044] In some embodiments, the permanent magnet 12 is made of neodymium iron boron (NdFeB). NdFeB has a much higher magnetic energy product than other permanent magnet materials (such as ferrite and AlNiCo), providing an extremely strong magnetic field. After magnetization, the magnet maintains a high-intensity magnetic field and has strong resistance to demagnetization. Its unit magnetic energy cost is lower than other high-performance magnets (such as samarium cobalt), making it suitable for large-scale applications.

[0045] In some embodiments, each U-shaped iron core 11 and each stator tooth is made of silicon steel sheet. Silicon steel sheets have high magnetic permeability, enabling efficient conduction of magnetic field lines and reducing energy loss in the magnetic circuit. High magnetic induction intensity (saturation magnetic flux density typically 1.5~2.0T) can be achieved even under a relatively weak external magnetic field. The addition of silicon to the silicon steel sheet reduces magnetic property fluctuations caused by temperature changes, making it suitable for long-term operation in high-temperature environments (such as the heat generated during transformer operation). Silicon steel sheets are 100% recyclable, meeting green manufacturing requirements.

[0046] In some embodiments, each magnetic adjustment block is made of a magnetically conductive material. Magneticly conductive materials (also known as magnetic materials) are materials that can be significantly magnetized by a magnetic field or affect the distribution of the magnetic field, and are widely used in fields such as power, electronics, communications, and medicine. Based on their magnetization characteristics and applications, magnetically conductive materials are mainly divided into soft magnetic materials and hard magnetic materials (permanent magnet materials). Soft magnetic materials have high permeability, low coercivity (easily magnetized and easily demagnetized), and low hysteresis loss. Hard magnetic materials have high coercivity, large remanence, and can maintain their magnetism for a long time after magnetization.

[0047] In some embodiments, please refer to Figures 1 to 3The mechanically adjustable stator-separated transformer provided in this embodiment of the invention further includes a fixing structure 60, which includes a fixing ring 61 and snap-fit ​​blocks 62. The fixing ring 61 is sleeved on the outer periphery of the stator adjusting magnet core 21 and the adjusting module 22, and is used to fix each stator tooth and each adjusting magnet block. Multiple snap-fit ​​blocks 62 are provided, and each snap-fit ​​block 62 is spaced apart around the axis of the fixing ring 61, with each snap-fit ​​block 62 located between any two adjacent adjusting magnet blocks (or stator teeth), enhancing the fixing effect on each stator tooth and each adjusting magnet block. Specifically, the radial height of the fixing ring 61 in the first stator assembly 10 is less than the height of each armature winding 50.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mechanically adjustable stator-separated transformer, characterized in that, The system includes a first stator assembly, a second stator assembly, a first rotor corresponding to the first stator assembly, and a second rotor corresponding to the second stator assembly; a first air gap is formed between the first rotor and the first stator assembly; a second air gap is formed between the second rotor and the second stator assembly; wherein the first stator assembly includes a plurality of U-shaped iron cores arranged in a ring-shaped interval and a plurality of permanent magnets respectively disposed in the gaps between each of the U-shaped iron cores; the second stator assembly includes a plurality of stator teeth that can correspond one-to-one with each of the U-shaped iron cores or each of the permanent magnets; When the center lines of each U-shaped iron core and each stator tooth correspond one-to-one and coincide, the permanent magnet generates two first permanent magnet chains that are connected in parallel and pass through the first air gap and the second air gap respectively; when the center lines of each permanent magnet and each stator tooth correspond one-to-one and coincide, the permanent magnet generates a first permanent magnet chain and a second permanent magnet chain, and the second permanent magnet chain is connected in parallel with the first permanent magnet chain.

2. The mechanically adjustable stator-separated transformer as described in claim 1, characterized in that, The second stator assembly further includes: The stator tuning magnet core has each of the aforementioned stator teeth; A magnet adjustment module is located between the first stator assembly and the stator magnet core.

3. A mechanically adjustable stator-separated transformer as described in claim 2, characterized in that, The magnetic adjustment module includes multiple magnetic adjustment blocks, each of which is configured to correspond one-to-one with each of the stator teeth.

4. A mechanically adjustable stator-separated transformer as described in claim 1, characterized in that, Any two adjacent permanent magnets are tangentially magnetized, and the magnetization directions are opposite.

5. A mechanically adjustable stator-separated transformer as described in claim 1, characterized in that, The mechanically adjustable stator-separated transformer also includes multiple armature windings, each armature winding being wound on each of the U-shaped iron cores; each armature winding is wound on two adjacent U-shaped iron cores, connecting the two adjacent U-shaped iron cores.

6. A mechanically adjustable stator-separated transformer as described in claim 5, characterized in that, The armature winding constitutes a three-phase winding, with the included angle between any two adjacent phases being 120°.

7. A mechanically adjustable stator-separated transformer as described in claim 1, characterized in that, The number of U-shaped iron cores is 24, and the number of permanent magnets is 24.

8. A mechanically adjustable stator-separated transformer as described in claim 7, characterized in that, The number of stator teeth is 24.

9. A mechanically adjustable stator-separated transformer as described in claim 1, characterized in that, The permanent magnet is made of neodymium iron boron material.

10. A mechanically adjustable stator-separated transformer as described in claim 1, characterized in that, All of the U-shaped iron cores and stator teeth are made of silicon steel sheets.

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