An adjustable inductance resonant generator

Abstract

The application belongs to the technical field of generator manufacturing, and particularly relates to a resonant generator with adjustable inductance. The saturated inductance method is applied to install a stator permanent magnet on the yoke or the slot bottom of a stator, the magnetic field of the permanent magnet passes through the pole teeth and pole shoes to form a magnetic circuit, when the rotor rotates, the magnetic field of the rotor with cross magnetic poles is continuously and alternately attracted and repelled with the magnetic field of the pole shoes and pole teeth, the magnetic flux of the pole teeth is automatically, periodically and cyclically changed, thereby the inductance of the coil with the pole teeth as a magnetic core is automatically, periodically and cyclically changed, the mutual inductance resonance and coupling resonance of the coil are generated, and the ferromagnetic resonance is automatically excited. Compared with the prior art, the application has the beneficial effects that the inductance of the coil is automatically and periodically adjusted by the saturated inductance method, the mutual inductance resonance and coupling resonance of the coil are generated, the ferromagnetic resonance is automatically excited, the generator operates in the ferromagnetic resonance state, thereby the rotational magnetic resistance of the rotor is reduced, the magnetic force of the permanent magnet is led out, and the efficiency of the generator is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of generator manufacturing technology, and specifically relates to an adjustable inductive resonant generator. Background Technology

[0002] There are many types of generators. Their basic structure includes components such as motor housing, stator, coil winding, rotor, central shaft, bearings, end cover, and fan. Their working principle is based on the laws of electromagnetic induction and electromagnetic force. The general principle of their construction is to use appropriate magnetic and electrical materials to form magnetic circuits and electrical circuits that mutually induce electromagnetic forces in order to generate electromagnetic power and achieve the purpose of energy conversion.

[0003] Various commercial generators have always used the law of electromagnetic force to generate electricity by cutting magnetic lines of force. The rotor or stator is equipped with permanent magnets or electromagnetic devices. The rotor rotates to cut magnetic lines of force and generate electricity. Whether it is N-pole cutting or S-pole cutting, the absolute value of the change in magnetic flux of the coil winding is roughly the same. The power generation efficiency of the generator body is low. Regardless of the development of material technology or the optimization of mechanical structure, the proportion of mechanical energy converted into electrical energy of the generator can usually only reach about 72%. On May 15, 2020, the official website of Thornger Automotive, a leading global supplier of automotive generators, featured a media report stating that its application of semiconductor technology and active rectification technology improved generator efficiency by 7%-8%, achieving a breakthrough in generator efficiency of over 80%. On April 30, 2025, the *China Science Daily* reported that the "Chulong 105" synchronous electric generator boasted a comprehensive efficiency of 98.8%. On November 25, 2025, Baidu Encyclopedia's entry on "Permanent Magnet Synchronous Generator" recorded an energy conversion efficiency of 92%-96% for its magnetic strips. However, these efficiencies mostly refer to the overall efficiency of the generator set, not the efficiency of the generator itself. Currently, among global generator manufacturers, only Thornger promotes its generator's intrinsic power generation efficiency as exceeding 80%, with no further technological breakthroughs. Commercial generator technology and intrinsic efficiency still need improvement.

[0004] An adjustable inductor is an inductor whose inductance can be manually adjusted. Inductance adjustment methods are mainly divided into two categories: physical adjustment and electronic control. Physical adjustment methods (manual or mechanical) primarily involve changing the position of the magnetic core, changing the number of coil turns (tap switching), or changing the coil geometry to adjust the inductance. Electronic control methods (automatic or dynamic adjustment) mainly include saturation inductance method, switching control method (thyristor control), quadrature core control method, and digital control adjustable inductor (emerging technology). The principle of the saturation inductance method is to set a control winding on the magnetic core, and apply a direct current to change the magnetic saturation of the core, thereby adjusting the equivalent inductance of the working winding. The control winding of the saturation inductance method can be replaced by a permanent magnet. The magnetic field of the permanent magnet changes the magnetic saturation of the core, thereby achieving dynamic adjustment of the inductance value. By mechanically changing the relative position of the permanent magnet and the coil or magnetic core (such as sliding or rotating), the magnetic flux coupling strength can be continuously adjusted, achieving continuous inductance adjustment.

[0005] Adjustable inductor technology is widely used in applications such as wireless charging systems, radio frequency tuning circuits, and impedance matching networks. However, there are currently no known application cases in generator design and manufacturing.

[0006] Ferromagnetic resonance is a special nonlinear resonance phenomenon in power systems. It is mainly caused by the interaction between iron-core inductive elements (such as electromagnetic voltage transformers and unloaded transformers) and system capacitive elements under specific conditions. Its core characteristic lies in the nonlinearity of the iron-core inductance. When the magnetic flux of the inductor core is saturated, its inductive reactance decreases significantly, thus forming a resonance condition with the system capacitance. Once ferromagnetic resonance occurs, it has a long-term self-sustaining characteristic. The occurrence of ferromagnetic resonance requires the simultaneous fulfillment of three basic conditions: First, the existence of a nonlinear inductance provided by an iron-core inductive element (such as a PT). After the excitation voltage rises to the saturation point, a small increase in voltage will cause a sharp increase in excitation current and a drastic decrease in equivalent inductance. Second, the existence of system-to-ground capacitance, such as the transformer winding-to-ground capacitance and the parasitic capacitance of the coil winding, which together with the nonlinear inductance of the PT form a possible resonant circuit. Third, the existence of an excitation source, such as a sudden change in system voltage, current surge, or other form of energy injection, causing the system parameters to shift from the normal operating state to the resonant state.

[0007] Ferromagnetic resonance can be divided into three main types: fundamental resonance, frequency division resonance, and high-frequency resonance. After ferromagnetic resonance occurs, the voltage and current in the system will show significant changes. The voltage and current generally increase by about 3 times. When frequency division resonance occurs, the current can reach 30-100 times the rated value.

[0008] Saturated ferroresonance specifically refers to a particular form of ferroresonance induced by the magnetic saturation of the iron core. Once this resonance is formed, it can be maintained for a long time even if the external disturbance disappears. After the iron core is saturated, the inductive reactance decreases sharply with the increase of current, forming a negative differential characteristic. The circuit impedance changes abruptly from inductive to capacitive, producing a phase reversal phenomenon (phase tilt). The phase of the circuit current reverses by 180°. During the oscillation process, the iron core periodically enters and exits the saturation state, continuously absorbing energy from the power frequency power supply to compensate for circuit losses and maintain resonance.

[0009] Currently, there are no reports of applying the ferroresonance phenomenon and physical principles to generator design and manufacturing. In particular, the phase reversal phenomenon generated by saturated ferroresonance, when applied to generator design and manufacturing, will significantly improve the efficiency of the generator itself. Summary of the Invention

[0010] To address the problems existing in the prior art, the present invention provides an adjustable inductive resonant generator.

[0011] The technical solution adopted by this invention to solve its technical problem is as follows: An adjustable inductive resonant generator, which uses the saturated inductance method, installs a stator permanent magnet in the yoke of the stator or at the bottom of the slot. The magnetic field of the permanent magnet is connected to the magnetic circuit through the pole teeth and pole shoes. When the rotor rotates, the rotor magnetic field with the cross-pole arrangement and the magnetic field of the pole shoes and pole teeth continuously and cyclically generate attraction and repulsion, automatically and periodically changing the magnetic flux of the pole teeth, thereby automatically and periodically changing the inductance of the coil with the pole teeth as the magnetic core, so that the coil generates mutual inductance resonance and coupling resonance, and automatically excites ferromagnetic resonance.

[0012] Preferably, the coil adopts a unit winding connection method: one or more coils whose inductance increases synchronously when the rotor rotates are connected in series with one or more coils whose inductance decreases synchronously to form a unit winding, and the unit windings are connected in series, parallel or mixed series and parallel to extract electrical energy.

[0013] Preferably, the coil adopts a two-layer or more stacked winding or stacked installation structure, with adjacent coils wound in opposite directions, and coils wound in clockwise / counterclockwise directions are installed crosswise; or, half of the coils are single-layer spiral reciprocating windings or bundled windings integrated into a single-layer coil, and the other half of the coils adopt a two-layer or more stacked winding or stacked installation structure, with the two types of coils wound in opposite directions and installed crosswise; or, the clockwise winding coils have the same number of turns, the counterclockwise winding coils have the same number of turns, the clockwise and counterclockwise winding coils have different numbers of turns, and the clockwise / counterclockwise winding coils are installed crosswise.

[0014] Preferably, capacitors are connected in parallel at the beginning and end of adjacent windings of the coil to form an LC or LLC resonant circuit.

[0015] Preferably, capacitors are connected in series at the beginning and end of adjacent windings of the coil, and the capacitors are connected to the ground of the motor housing.

[0016] Preferably, the magnetic poles of the stator permanent magnet are all N-pole pointing towards the axis, or the magnetic poles of the stator permanent magnet are all S-pole pointing towards the axis; the magnetic poles of the rotor permanent magnet or excitation magnet are N-pole and S-pole pointing towards the axis in an alternating manner.

[0017] Preferably, the magnetic pole direction of the stator permanent magnet and the direction of the rotor magnetic pole are radially deflected by a certain angle, with the deflection angle being within 45 degrees.

[0018] Preferably, it includes a coaxial ring-shaped layered structure: the outermost layer is the motor housing, and a central shaft is provided in the center. The central shaft passes through the rotor and is locked together with a key pin to form a whole. From the center outwards, the components are: rotor permanent magnets distributed circumferentially on the rotor, coils wound around the stator teeth, and stator permanent magnets mounted on the stator. The stator is placed between the motor housing and the rotor; The stator pole shoe is asymmetrical on both sides with the pole tooth as the axis of symmetry. One side of the stator pole shoe is the thin side, and the other side is the thick side. When the stator is manufactured in a modular manner, the lap joint groove is set such that the thin side of the pole shoe is a groove and the thick side of the pole shoe is a protrusion.

[0019] Preferably, when the stator permanent magnet is installed at the bottom of the stator slot, there is a stator magnetic gap between the stator yoke, the middle of the pole teeth and the pole shoe. The magnetic gap is connected and divides the pole teeth and pole shoes into independent sides. The length of the magnetic gap in the yoke is not less than one-third of the arc length of the magnet.

[0020] Preferably, the output terminal of the coil winding is connected to a rectifier module to output DC power.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By applying the saturated inductance method to automatically and periodically adjust the coil inductance, the coil generates mutual inductance resonance and coupling resonance, automatically stimulating ferromagnetic resonance. The generator operates in a ferromagnetic resonance state, thereby reducing the rotor's rotational magnetic reluctance and extracting the magnetic force of the permanent magnet. The adjustable inductance resonant generator of this invention can significantly improve the generator's power generation efficiency.

[0022] 2. By applying inductance automatic, cyclic, and periodic adjustment technology, using two or more layers of coils connected in series, or a combination of two layers and a single layer, or a combination of coils with different winding turns, and in conjunction with the special connection method of the unit winding, the generator can be automatically excited and maintained to operate in a saturated ferromagnetic resonance state, causing the current phase to reverse 180°, greatly reducing the rotor rotational magnetic resistance, and converting the mutual attraction and repulsion between the stator permanent magnet and the rotor permanent magnet into electricity, thus greatly improving the efficiency of the generator body.

[0023] 3. By adopting a radial deflection design of magnetic poles and an asymmetrical pole shoe structure, inductive energy can be extracted when the coil current is reversed. This energy, together with the attraction and repulsion of the rotor and stator permanent magnets, supplies the energy required to maintain saturated ferromagnetic resonance, thus maintaining the generator in ferromagnetic resonance state and greatly improving the generator's power generation efficiency.

[0024] In summary, the adjustable inductor resonant generator of the present invention can significantly improve the generator's power generation efficiency, greatly reduce power generation costs and carbon dioxide emissions, and enhance the economic and environmental benefits for the whole society. Attached Figure Description

[0025] Figure 1 This is a front cross-sectional view of an adjustable inductor resonant generator.

[0026] Figure 2 This is the front view of the stator assembly.

[0027] Figure 3 This is a front view of the stator structure with the magnets mounted at the bottom of the slot.

[0028] In the diagram: 1. Motor housing; 2. Stator assembly; 3. Magnet gasket; 4. Stator permanent magnet; 5. Coil; 6. Insulating frame; 7. Rotor; 8. Rotor permanent magnet; 9. Central shaft; 10. Thin side of pole shoe; 11. Thick side of pole shoe; 12. Shaft key pin; 13. Stator yoke; 14. Magnet mounting slot; 15. Pole tooth; 16. Slot bottom; 17. Stator magnetic gap. Detailed Implementation

[0029] To facilitate understanding of the present invention, it will be described in more detail below with reference to the accompanying drawings and specific embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention.

[0030] An adjustable inductive resonant generator employs the saturated inductance method. A stator permanent magnet 4 is installed on the yoke of the stator or at the bottom of the slot. The magnetic field of the stator permanent magnet 4 is connected to the magnetic circuit through the pole teeth 15 and the pole shoes. When the rotor 7 rotates, the rotor magnetic field with the cross-pole arrangement continuously and cyclically attracts and repels the magnetic field of the pole shoes and the pole teeth 15, automatically and periodically changing the magnetic flux of the pole teeth 15. This automatically and periodically changes the inductance of the coil 5 with the pole teeth 15 as the magnetic core, causing the coil 5 to generate mutual inductive resonance and coupled resonance, automatically stimulating ferromagnetic resonance, and enabling the generator to operate in a ferromagnetic resonance state.

[0031] In one embodiment, the coil 5 adopts a unit winding connection method: one or more coils 5 whose inductance increases synchronously when the rotor 7 rotates are connected in series with one or more coils 5 whose inductance decreases synchronously to form a unit winding. The unit winding uses series, parallel or series-parallel connection to extract electrical energy. The surge voltage and current generated by voltage and current change automatically excite ferromagnetic resonance.

[0032] In one embodiment, coil 5 adopts a two-layer or more stacked winding or stacked mounting structure. It utilizes the interlayer voltage difference and parasitic capacitance caused by the rotor magnetic field gradient distribution, and the transformer mutual inductance effect of the same magnetic core is superimposed to transfer energy. The winding directions of adjacent coils are opposite, and they are arranged in a clockwise / counterclockwise alternating manner. The coil connection method of the above-mentioned unit winding causes the pole teeth 15 to generate magnetic saturation when the current flows, which automatically excites saturated ferromagnetic resonance.

[0033] In one embodiment, half of the coils 5 adopt a two-layer or more stacked winding or stacked installation structure, and the other half adopts a single-layer spiral reciprocating winding or bundled winding integrated single-layer coil structure. The two coil winding directions are opposite and are cross-installed in the slots and on the pole teeth to form a saturated ferromagnetic resonance condition.

[0034] In one embodiment, the clockwise wound coil 5 has the same number of turns, the counterclockwise wound coil 5 has the same number of turns, the clockwise and counterclockwise wound coil 5 have different numbers of turns, and the clockwise and counterclockwise wound coil 5 are installed alternately to form a saturated ferromagnetic resonance condition.

[0035] In one embodiment, capacitors are connected in parallel at the beginning and end of the adjacent windings of coil 5 to form an LC or LLC resonant circuit. Under the same frequency resonance state, the impedance of coil 5 is greatly reduced, which enhances the energy exchange between adjacent magnetic poles, improves the conversion efficiency, and forms the conditions for automatically exciting saturated ferromagnetic resonance.

[0036] In one embodiment, capacitors are connected in series at the beginning and end of adjacent windings of coil 5, and the capacitors are connected to the ground of motor housing 1 to increase the capacitance of coil 5 winding to ground, thus creating conditions for exciting ferromagnetic resonance.

[0037] In one embodiment, the magnetic poles of the stator permanent magnet 4 are all N poles pointing towards the axis, or the magnetic poles of the stator permanent magnet 4 are all S poles pointing towards the axis; the magnetic poles of the rotor permanent magnet or excitation magnet are N poles and S poles pointing towards the axis in an alternating manner; when the rotor 7 rotates, the rotor magnetic field and the magnetic field of the stator pole shoes and pole teeth 15 periodically attract and repel each other, causing the magnetic flux of the pole teeth 15 to change in a sinusoidal periodic pattern.

[0038] In one embodiment, the magnetic pole direction of the stator permanent magnet 4 and the direction of the rotor magnetic pole are radially deflected by a certain angle. This is used to adjust the rate of change of magnetic flux of the pole teeth 15 and pole shoes when the rotor 7 rotates, thereby adjusting the rate of change of inductance of the coil 5 and thus adjusting the surge voltage and current. The magnetic pole deflection angle is within 45 degrees; exceeding 45 degrees will result in magnetic pole reversal.

[0039] In one embodiment, the generator structure is a coaxial ring-shaped layered structure: the outermost layer is the motor housing 1, and the center is provided with a central shaft 9, which passes through the rotor and is locked together by a shaft key pin 12 to form a whole. From the center outwards, the components are: rotor permanent magnets 8 distributed circumferentially on rotor 7, coils 5 wound around stator teeth, and stator permanent magnets 4 mounted on stator. The stator is placed between the motor housing 1 and the rotor body 7; With the pole tooth 15 as the axis of symmetry, the two sides of the stator pole shoe are asymmetrical. One side of the stator pole shoe is the thin side 10, and the other side is the thick side 11. The thickness of the thin side 10 and the thick side 11 is the same near the pole tooth 15. The thin side 10 is thinned towards the edge, while the thickness of the thick side 11 is consistent. When energized, the magnetic force of the thick side 11 is greater than that of the thin side 10. This, combined with the deflection of the rotor magnetic poles, reduces the rotor's rotational magnetic resistance. When the current switches, the inductor energy storage can drive the rotor to rotate.

[0040] When the stator is manufactured in a modular manner, the concave-convex lap joint groove is set in such a way that the thin side 10 of the pole shoe is a groove and the thick side 11 of the pole shoe is a protrusion. When energized, the magnetic force of the thick side 11 of the pole shoe is stronger than that of the thin side, which, together with the deflection of the rotor magnetic poles, reduces the rotor rotation magnetic resistance.

[0041] In one embodiment, when the stator permanent magnet 4 is installed at the bottom 16 of the stator slot, there is a stator magnetic gap 17 between the stator yoke 13, the pole teeth 15 and the pole shoes. The magnetic gap is connected, dividing the pole teeth 15 and the pole shoes into independent sides. The length of the magnetic gap in the yoke is not less than one-third of the arc length of the magnet, so that the magnetic flux of the pole teeth 15 changes in a sinusoidal period when the rotor 7 rotates.

[0042] In one embodiment, the output terminal of the coil winding is connected to a rectifier module to output direct current.

[0043] Example 1: An adjustable inductor resonant generator, based on the basic structure of a general generator, applies the saturated inductance method to automatically, periodically, and cyclically adjust the magnetic flux of the generator pole teeth 15, thereby automatically, periodically, and cyclically adjusting the inductance of the coil 5 with the pole teeth 15 as the magnetic core, causing the coil 5 to generate mutual inductance resonance and coupled resonance, automatically exciting ferromagnetic resonance. Specifically: Combination Figure 1-3The outermost layer is the motor housing 1. The stator assembly 2 is circumferentially and equidistantly embedded in the motor housing 1 in a concave-convex overlapping manner. The stator permanent magnet 4 is embedded on the stator assembly 2. The stator permanent magnet 4 has a magnetic pad 3 on its outer side, which is integrally embedded in the stator yoke with the stator permanent magnet 4. The insulating frame 6 is fitted on the pole teeth 15. The coil 5 is installed in the stator slot. The central shaft 9 passes through the rotor 7 and is locked into one piece by the shaft key pin 12. The rotor 7 is circumferentially embedded with the rotor permanent magnet 8. The rotor 7, the central shaft 9, the assembly stator and the motor housing 1 are installed coaxially.

[0044] Stator permanent magnets 4 are installed in the stator yoke 13 or at the bottom of the slot 16. The magnetic field of the stator permanent magnets 4 is connected to the magnetic circuit through the pole teeth 15 and pole shoes, meaning that magnetic flux passes through the pole teeth 15 and pole shoes, which are equivalent to the magnetic core. When the rotor 7 rotates, the rotor permanent magnets 8 with their cross-pole arrangement automatically, cyclically, and alternately attract and repel the pole shoes and pole teeth 15. During attraction, the pole teeth 15 and pole shoes exhibit periodic changes in the upper half of a sine wave of magnetic flux; during repulsion, the pole teeth 15 and pole shoes exhibit periodic changes in the lower half of a sine wave of magnetic flux. The periodic changes in the magnetic flux of the pole teeth 15 automatically adjust the inductance of the coil 5, which uses the pole teeth 15 as the magnetic core, to exhibit a periodic sine wave change. The rotor permanent magnets 8 have N and S poles crossing circumferences on the rotor. The installation causes the magnetic flux change period of the coil 5 on adjacent pole teeth 15 to differ by 1 / 2 period. That is, the inductance of the coil 5 installed on adjacent pole teeth 15 changes simultaneously, one is the change of the upper half of the sine wave, and the other is the change of the lower half of the sine wave. The change of inductance causes changes in physical quantities related to current flow, such as inductance time constant and impedance, resulting in voltage and current fluctuations and surge voltage and current, thereby generating mutual inductance resonance, coupling resonance, and resonance of the same waveform and frequency, and exciting ferromagnetic resonance.

[0045] Ferromagnetic resonance causes abnormal changes in voltage and current. Specifically, sub-frequency resonance can lead to a voltage increase of no more than 2 times and a primary winding current in the PT reaching 30-50 times or even higher than the normal rated current; fundamental resonance can lead to a voltage increase of no more than 3 times and a current increase of more than 3 times; high-frequency resonance can lead to a voltage increase of 3-3.5 times or more and a current increase of about 3 times. Saturated ferromagnetic resonance specifically refers to a particular form of ferromagnetic resonance induced by core magnetic saturation. Once the resonance is formed, it can be maintained for a long time even if external disturbances disappear. After core magnetic saturation, the inductive reactance decreases sharply with increasing current, forming a negative differential characteristic. The circuit impedance abruptly changes from inductive to capacitive, producing a phase reversal phenomenon (phase tilt). The circuit current phase reverses by 180°, and the voltage and current waveforms produce tooth waves.

[0046] The connection method of coil 5 winding is to take one or more coils 5 with increasing inductance at the same time when the rotor body 7 rotates, and one or more coils 5 with decreasing inductance at the same time in series as a unit winding. The unit windings are connected in series, parallel or mixed series and parallel to output electrical energy. This connection method can make the change of inductance double the effect on the circuit, resulting in huge changes in voltage and current, generating surge voltage and current, and forming the conditions for exciting ferromagnetic resonance.

[0047] The winding method of coil 5 adopts the technology disclosed in patent applications CN119995281A and CN120956005A, using a single-strand wire or multiple strands combined into one. Because the magnetic flux of the excitation or permanent magnet of the generator rotor body 7 is gradient-distributed, the voltage of each turn of the stator coil 5 also exhibits a gradient distribution due to its distance from the magnetic poles of the rotor body 7 when the rotor body 7 rotates. When coil 5 is wound in two or more layers, or stacked on top of each other and installed on the generator, the gradient distribution of magnetic flux to the magnetic poles of the rotor body 7 leads to voltage differences between the layers of coil 5, increasing the parasitic capacitance between the layers and causing inconsistencies in voltage and current between them. Since each layer of coil 5 uses the same magnetic core, a transformer structure is formed, and the current flow in each layer generates mutual inductance, transferring energy to other layers through the magnetic core. The stator yoke 13, pole teeth 15, and pole shoes (10, 11) of the generator conduct magnetic circuits of adjacent magnetic poles. There is also a transformer structure with stator magnetic gap 17 between the magnetic poles. The self-resonance of the magnetic poles can cause coupling resonance between adjacent magnetic poles, which can induce each other and transfer energy. The above energy transfer and the increase of parasitic capacitance, the superposition of one or more coils 5 with simultaneously increased inductance, the series connection of one or more coils 5 with simultaneously decreased inductance, and the magnetic flux introduced into the pole teeth 15 by the stator permanent magnet 4 can lead to magnetic saturation, excite saturated ferromagnetic resonance, and greatly improve the power generation efficiency of the generator body.

[0048] The coil 5 winding adopts the technology disclosed in patent applications CN119995281A and CN120956005A, with parallel capacitors connected in the winding layers to form an inductor-capacitor (LC) resonance or LLC resonance. The tail and head ends of adjacent winding conductors of coil 5 are led out and connected in parallel with capacitors to form an LC parallel resonance. Coils 5 can be connected in series, parallel, or a hybrid series-parallel connection to achieve resonance at the same frequency. At the self-resonant frequency, the impedance of coil 5 is significantly reduced, and the magnetic reluctance of rotor 7 can be further reduced. In the same-frequency resonance state, the mutual inductance of coil 5 enhances the energy exchange between adjacent magnetic poles, thereby improving the generator's power generation efficiency. Alternatively, the tail and head ends of adjacent winding conductors of coil 5 are led out, connected in series with capacitors, and then grounded to increase the coil winding's capacitance to ground, forming the conditions for ferromagnetic resonance excitation.

[0049] The magnetic poles of the stator permanent magnet 4 are all N-pole pointing towards the axis, or the magnetic poles of the stator permanent magnet 4 are all S-pole pointing towards the axis; the magnetic poles of the permanent magnet or excitation magnet of the rotor body 7 are N-pole and S-pole pointing towards the axis in an alternating manner. This structure ensures the periodic change of magnetic flux of the pole teeth 15 when the rotor body 7 rotates.

[0050] The magnetic poles of the stator permanent magnet 4 and the rotor body 7 are radially deflected by a certain angle to adjust the change in magnetic flux in accordance with the change in inductance time constant. This also allows the coil 5 to extract inductance energy when the current direction changes, and to extract the attraction and repulsion forces of the magnets as electrical energy. A deflection angle of 45 degrees is the limit angle; exceeding 45 degrees will cause the magnetic poles to commutate.

[0051] The stator pole shoes are asymmetrical; when the stator is manufactured using modular components, such as... Figure 2 As shown, the stator block 2 is asymmetrical with the pole tooth 15 as the axis of symmetry. One side is the thin side 10 of the pole shoe, and the other side is the thick side 11 of the pole shoe. The main difference lies in their thickness. This design utilizes the characteristics of an electromagnet. When current flows through the coil 5, the magnetic force on the thicker side of the pole shoe is greater than that on the thinner side. Combined with the deflection of the magnetic poles of the rotor body 7 magnet, this further reduces the rotational magnetic resistance of the rotor body 7. When the current direction in the coil 5 changes, the inductive energy storage can drive the rotor body 7 to rotate.

[0052] When installing the stator permanent magnet 4 at the bottom 16 of the stator slot, see Figure 3 A stator magnetic gap 17 is provided between the stator yoke 13, the pole teeth 15, and the pole shoes. This magnetic gap connects the pole teeth and pole shoes, dividing them into two sides. This allows the magnetic fields of the permanent magnets on both sides of the pole teeth 15 to form a closed magnetic circuit through the pole teeth 15 and pole shoes. Without this magnetic gap, the mutually repelling stator permanent magnets 4 cannot stably conduct the magnetic circuit through the pole teeth 15 and pole shoes, and cannot cause a sinusoidal change in the magnetic flux of the pole teeth 15 and pole shoes when the rotor body 7 rotates. The distance of the stator magnetic gap 17 is an empirical value; the gap distance varies depending on the material. The magnetic gaps of the stator yoke 13, the pole teeth 15, and the pole shoes (10, 11) are connected, and the length of the yoke magnetic gap is not less than one-third of the magnet arc length.

[0053] When installing the stator permanent magnet 4 on the stator yoke 13, a magnet mounting groove 14 is formed on the stator yoke 13. The stator permanent magnet 4 is symmetrically placed in the magnet mounting groove 14 on both sides with the pole tooth 15 as the axis of symmetry. See Figure 1 This design ensures that the magnetic flux of the pole teeth 15 and pole shoes changes sinusoidally when the rotor body 7 rotates.

[0054] The adjustable inductor resonant generator generates a large number of resonant waves due to resonance, so it cannot be directly output as AC power. The coil 5 winding is connected to the rectifier module to output DC power.

[0055] The combined use of interdisciplinary technologies makes it possible to significantly improve the power generation efficiency of generators. The inventors have creatively applied adjustable inductance technology and ferromagnetic resonance technology to design and manufacture generators, and have disclosed this technological achievement in the context of this breakthrough in efficiency.

[0056] The beneficial effects of this invention are as follows: By automatically and periodically adjusting the coil inductance using the saturated inductance method, mutual inductance resonance and coupling resonance are excited, and ferromagnetic resonance is automatically excited, which can reduce the magnetic reluctance of the generator rotor. Using a single-winding method to connect the coil, and employing special designs such as two or more layers of coil windings, combinations of single and multiple windings, and combinations of different winding turns, saturated ferromagnetic resonance can be generated, significantly reducing rotor magnetic reluctance and greatly improving power generation efficiency. The radial deflection design of the magnetic poles and the asymmetrical pole shoe structure can extract inductive energy storage and the attraction / repulsion force of the permanent magnet into electrical energy during coil current commutation, fully recovering and utilizing magnetic energy and reducing energy loss. The reserved stator magnetic gap 17 design can increase the magnetic flux of the pole teeth. The resonant excitation process is controllable due to the sinusoidal periodic variation and the special connection method of the unit winding. The stator block 2 adopts a concave-convex overlapping assembly structure, and the coil 5 can adopt various processes such as single-strand / multi-strand parallel winding and multi-layer stacking to adapt to the design requirements of generators of different power levels, with low production and assembly difficulty. The winding output end is connected to the rectifier module to directly output DC power, avoiding the impact of a large number of harmonics generated by resonance on electrical equipment. It can be directly adapted to DC power consumption scenarios or subsequent inverter links, simplifying the power processing process. The application of the adjustable inductor resonant generator of this invention significantly improves the generator's power generation efficiency, greatly reduces power generation costs and carbon dioxide emissions, and enhances the economic and environmental benefits of the whole society.

[0057] Example 2: The present invention relates to an implementation of installing a stator permanent magnet 4 on the stator yoke 13.

[0058] The principle of the small adjustable inductive resonant generator is designed and manufactured. The rotor permanent magnet 8 is a multi-pole permanent magnet, such as 12 poles, or simply a 12-pole permanent magnet. The N pole and S pole are arranged alternately. The stator has 12 poles. 12 permanent magnets are embedded in the yoke of the stator poles and in the center of the pole teeth 15 to adjust the inductance of the coils 5 on the poles. The N pole points to the axis. The magnetic field direction of the stator poles and the rotor body 7 poles is deflected radially to the axis by a certain angle.

[0059] The winding method is as follows: The starting point of the conductor is fixed at the junction of the stator pole teeth and the yoke. Using pole tooth 15 as the axis, the conductor is wound clockwise 15 turns towards the pole shoe, then clockwise 15 turns towards the yoke, repeating this spiral winding for 10 layers, totaling 150 turns, forming the first layer of coil 5. Next, adjacent to the first layer, using pole tooth 15 as the axis, the first layer of coil 5 is continued towards the pole shoe, repeating this spiral winding for 10 layers, totaling 150 turns, forming the second layer of coil 5. This results in a coil 5 with two layers and 300 turns. When current flows through coil 5, the magnetic field direction of each winding layer is the same, as determined by the right-hand screw rule. Adjacent coils 5 are wound in the same way but in opposite directions, with the winding directions of the 12 poles alternating between clockwise and counterclockwise. The coil 5 with 12 magnetic poles is connected in series with two adjacent coils 5 wound clockwise and counterclockwise to form a unit winding. The six unit windings are connected in series in two groups and then in parallel to form the generator low magnetic reluctance coil 5 winding, which is connected to the junction box and connected to the rectifier module to output DC power.

[0060] Actual test of the generator's power generation efficiency: The generator was tested using a single-phase frequency-modulated speed-regulating motor with a nominal power of 2 kW and a maximum speed of 3000 rpm. At 2500 rpm, the motor power consumption was 1175 watts, and after rectification, the stable output DC resistive load was 842 watts. The electro-to-electric conversion efficiency was measured to be 71.65%. Based on the speed-regulating motor power consumption multiplied by 0.75, the power generation efficiency of the adjustable inductor resonant generator in this embodiment was estimated to be greater than 95%, which is much higher than that of generators reported on the market.

[0061] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. An adjustable inductance resonant electric generator, characterized by, By applying the saturated inductance method, a permanent magnet is installed in the yoke of the stator or at the bottom of the slot. The magnetic field of the permanent magnet is connected to the magnetic circuit through the pole teeth and pole shoes. When the rotor rotates, the magnetic field of the rotor with its cross-pole arrangement and the magnetic field of the pole shoes and pole teeth continuously and cyclically generate attraction and repulsion, automatically and periodically changing the magnetic flux of the pole teeth, thereby automatically and periodically changing the inductance of the coil with the pole teeth as the magnetic core, causing the coil to generate mutual inductance resonance and coupling resonance, and automatically exciting ferromagnetic resonance.

2. The tunable inductive resonant electric generator of claim 1, wherein, The coil adopts a unit winding connection method: one or more coils with synchronously increasing inductance as the rotor rotates are connected in series with one or more coils with synchronously decreasing inductance to form a unit winding. The unit windings are connected in series, parallel or mixed series and parallel to extract electrical energy.

3. The tunable inductive resonant electric generator of claim 1, wherein, The coils adopt a two-layer or more stacked winding or stacked installation structure, with adjacent coils wound in opposite directions, and clockwise / counterclockwise coils installed alternately; or, half of the coils are single-layer spiral reciprocating windings or bundled windings integrated into a single-layer coil, and the other half of the coils adopt a two-layer or more stacked winding or stacked installation structure, with the two types of coils wound in opposite directions and installed alternately; or, the clockwise winding coils have the same number of turns, the counterclockwise winding coils have the same number of turns, the clockwise and counterclockwise winding coils have different numbers of turns, and the clockwise / counterclockwise winding coils are installed alternately.

4. The tunable inductive resonant electric generator of claim 3, wherein, After the first and last ends of adjacent windings of the coil are led out, capacitors are connected in parallel to form an LC or LLC resonant circuit.

5. The adjustable inductive resonant generator according to claim 3, characterized in that, After the first and last ends of adjacent windings of the coil are led out, capacitors are connected in series, and the capacitors are connected to the motor housing and grounded.

6. The adjustable inductive resonant generator according to claim 1, characterized in that, The stator permanent magnet has all N poles pointing towards the axis, or the stator permanent magnet has all S poles pointing towards the axis; the rotor permanent magnet or excitation magnet has N and S poles pointing towards the axis in an alternating pattern.

7. The adjustable inductive resonant generator according to claim 6, characterized in that, The direction of the stator permanent magnet and the direction of the rotor magnetic pole are radially deflected by a certain angle, which is within 45 degrees.

8. The adjustable inductive resonant generator according to any one of claims 1-7, characterized in that, The structure includes a coaxial, ring-shaped, layered arrangement: the outermost layer is the motor housing, and a central shaft is located in the center. The central shaft passes through the rotor and is locked together with a key pin to form a single unit. From the center outwards, the components are: rotor permanent magnets distributed circumferentially on the rotor, coils wound around the stator teeth, and stator permanent magnets mounted on the stator. The stator is placed between the motor housing and the rotor; The stator pole shoe is asymmetrical on both sides with the pole tooth as the axis of symmetry. One side of the stator pole shoe is the thin side, and the other side is the thick side. When the stator is manufactured in a modular manner, the concave-convex lap joint groove is set such that the thin side of the pole shoe is a groove and the thick side of the pole shoe is a protrusion.

9. The adjustable inductive resonant generator according to claim 8, characterized in that, When the stator permanent magnet is installed at the bottom of the stator slot, there is a stator magnetic gap between the stator yoke, the middle of the pole teeth and the pole shoe. The magnetic gap is connected and divides the pole teeth and pole shoe into two independent sides. The length of the magnetic gap in the yoke is not less than one-third of the arc length of the magnet.

10. The adjustable inductive resonant generator according to claim 1, characterized in that, The output terminal of the coil winding is connected to the rectifier module to output DC power.

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