235 results about "Single coil" patented technology

A system for administering transcranial magnetic stimulation in which two or more coils are applied to the patient's body. The coils each may emit a magnetic field which when positioned in one or more configurations result in field overlapping. Magnetic field overlap achieves therapeutic effects otherwise difficult, or impossible, to achieve from traditional single coil TMS devices.

The invention discloses a single-coil winding type four-eight-pole composite iron system for beam homogenization. The composite iron system comprises a composite magnet current control device, a composite magnet main power supply and four-pole / eight-pole composite iron, the quadrupole / octupole composite iron has eight pole heads, and only one type of excitation coil is wound on each pole head; the current value of the A-type excitation coil is an absolute value of a quadrupole magnetic field excitation current value plus an octupole magnetic field excitation current value; the current value of the B-type excitation coil is an absolute value obtained by subtracting an octupole magnetic field excitation current value from a quadrupole magnetic field excitation current value; the quadrupole / octupole composite iron is used for simultaneously generating a dominant quadrupole magnetic field and an octupole magnetic field, so that the effects of quadrupole iron and octupole iron can be simultaneously realized by only installing one transmission element; the excitation coil structure of the quadrupole / octupole composite iron composite magnet is improved, and only one excitation coil is wound on each pole head, so that the size of the coil structure can be reduced, and the construction cost is reduced.

A wireless charging module can include a base, a charging coil module, and a switch. The charging coil module can be releasably securable to the base. The charging coil module can include one or more electrical connectors to electrically engage with the base when the charging coil module is secured to the base. The charging coil module can be interchangeable between a single coil module and a multi-coil module. The wireless charging module can be configured to wirelessly charge a mobile device when the charging coil module is secured to the base. The switch can be movable between a first configuration and a second configuration. The switch can be configured to secure the charging coil module to the base in the first configuration and the switch can be configured to release the charging coil module from the base in the second configuration.

The invention relates to the technical field of power transmission and distribution switches, and discloses a vacuum bypass switch, which comprises an insulating shell, a static end copper bar, a movable end copper bar, a vacuum switch tube, an insulator, a pull rod and a permanent magnetic mechanism, the pull rod is driven by a magnetic field generated by the permanent magnet assembly to drive the moving end copper bar to move in the direction away from the vacuum switch tube so as to realize opening. The first coil and / or the second coil generate / generates a target magnetic field opposite to the magnetic field generated by the permanent magnet assembly in direction under the power-on effect so as to drive the pull rod to drive the movable end copper bar to move towards the vacuum switch tube, and closing is achieved. Closing is achieved through the first coil and / or the second coil, the problem that closing cannot be achieved due to single-coil faults is avoided, and the problem of thermal runaway caused by continuous energization of the single coil is solved. The invention also discloses a bypass switch control system, which controls the energization of the first coil and the second coil through the first energizing loop and the second energizing loop respectively to ensure the reliable closing of the vacuum bypass switch.

The invention provides a metal film thickness measuring method capable of reducing a parasitic capacitance effect, and a device adopted by the method comprises a sensor coil, a front signal processing module, a data acquisition module, a communication module and an upper computer, the method comprises the following steps: respectively inputting alternating voltage to a sensor coil and a preposed signal processing circuit through a crystal oscillator in a signal generator, outputting a measured impedance value corresponding to the thickness of a metal film through the preposed signal processing circuit, inputting the impedance value into an upper computer through a data acquisition module and a communication module, and performing fitting operation in the upper computer to obtain the thickness of the metal film. Calculating to obtain a corresponding metal film thickness characteristic value; according to the invention, a single-coil sensor system is taken as a core part, and the measurement method adopts a characteristic slope method combined with differential evolution algorithm fitting, so that the nano-scale thickness resolution can be obtained, and the parasitic capacitance effect can be remarkably reduced.

The utility model discloses winding, peeling and soldering equipment for a round single coil of a flat wire. The winding, peeling and soldering equipment comprises a forming section and a processing section, wherein the forming section is used for forming a high-power chip inductor coil; the processing section is used for processing after the coil is formed; the forming section sequentially comprises a material carrying and discharging frame, a wire feeding and cutting mechanism, a winding forming mechanism and an automatic discharging mechanism according to the machining process. The machining section sequentially comprises a pin arranging mechanism, a laser peeling mechanism, a pin bending mechanism, a tin soldering mechanism and a forming and discharging mechanism according to the machining process. And the product conveying mechanism is arranged at the front ends of the other groups of mechanisms of the processing section. The integrated machining process of coil winding, peeling, pin folding and tin soldering is achieved, the effect of integrated machining is achieved, and the production efficiency and the productivity can be effectively improved; and moreover, the processing precision of automatically processed coil winding and wire leg soldering tin is higher, the quality of processed and formed products is better, and the convenient, efficient and high-quality processing requirements of enterprises in large-scale production are better met.

The utility model discloses a transcranial magnetic stimulator and system for generating repeated pairwise stimulation, the transcranial magnetic stimulator adopts a main control module, a stimulation module and a coil module which are electrically connected in sequence, and a plurality of replacement modules are respectively connected with the single coil module. Or the plurality of replacement modules are respectively connected with the plurality of coil modules in a one-to-one correspondence manner, a stimulation instruction is issued to the plurality of control units in the stimulation module through the main control module, and the stimulation instruction comprises a started lock time interval, so that the plurality of stimulation units start stimulation at a certain time interval, and multi-beat paired stimulation or single-beat paired stimulation is realized. The transcranial magnetic stimulator for generating repeated paired stimulation is simple in technology, convenient to operate, low in cost and easy to widely popularize.

The invention discloses an electromagnetic shock wave source, which comprises a base, a sealed chamber and a plurality of groups of electromagnetic units, coils of the plurality of groups of electromagnetic units are arranged according to a certain angle, and a plurality of focuses are combined according to different ranges after focusing. And a desired large focusing area which is not limited by the central strength of a single coil and consists of a plurality of focal regions can be obtained. Meanwhile, the multiple electromagnetic units are arranged according to a certain angle, although the size of a wave source output port is larger than that of an output port of a single electromagnetic unit, the size of the wave source output port is far smaller than the sum of the sizes of the output ports of the multiple electromagnetic units, on the premise that the electromagnetic shock wave source focal region is enlarged, the equipment size is reduced, and the equipment adaptability is improved. The invention further provides pressure pulse equipment which comprises the electromagnetic shock wave source, the focal region of the electromagnetic shock wave source is enlarged, the electromagnetic shock wave technology obtains focal spots of any size, various specific treatment requirements are met, and the shock wave technology is suitable for the field needing large-area treatment and physical therapy.

A coil structure for near-field wireless power transfer, integrating the traditional inductor and external capacitor structure into one single coil and forming a series resonance. The series resonance is achieved by a terminal connection and layering method. The electric field is canceled via a distributed turn-to-turn interleaving structure. With the integrated capacitor, the costs and space of a resonant capacitor can be saved. With the canceled electric field, the interference with neighboring components, such as touch-screen, can be reduced. Other benefits can include low-profile and fabrication convenience based on RGB technology. This coil can be useful for both consumer electronics and electric vehicle wireless charging.

Rotor (1) of an electrically excited synchronous machine (2) with a rotor body (4) rotatable about a rotor axis (3), the rotor body having several salient poles (5) arranged along a circumferential direction of the rotor (1), each pole pole comprising a pole shaft (6) and a pole shoe (7) arranged at the end of the pole shaft (6), the pole shafts (6) each being enclosed by a single coil (9) of an excitation winding (10) of the rotor (1), the pole shoes (7) each projecting into the adjacent pole slots (12), the pole shoe (7) of each salient pole (5) having a coil support surface (13) towards both pole slots (12) for supporting the respective single coil (9), a closing element (20) being arranged in each of the pole slots (12), which is provided for closing the respective pole slot (12) and is supported on two pole shoe support ramps (17) which are attached to mutually facing pole shoe ends (7e) of adjacent pole shoes (7) are formed, characterized by the fact that The pole shoe support slopes (17) of the respective pole shoe (7) each have an oblique angle (α) to the coil support surface (13), which is in the range between one degree and 45 degrees, in particular between two degrees and 25 degrees.

The invention discloses a hexagonal array eddy current probe, and belongs to the field of eddy current probes, the hexagonal array eddy current probe comprises a plurality of eddy current detection coils, the detection coils are self-inductance coils, the coil units are the same in size and consistent in parameter, the coils are arranged in an array according to a hexagonal rule, and the distance between the adjacent coils is equal and is smaller than the outer diameter of the coils. According to the invention, through a topological connection mode that one coil is arranged at an interval, a detection blind area right below a single coil is effectively covered and eliminated, and the detection accuracy is improved.

Rotor of an electrically excited synchronous machine (2) with a rotor body (4) rotatable about a rotor axis (3), in particular a rotor lamination stack, which has several salient poles (5) arranged along a circumferential direction of the rotor (1), each of which has a pole shaft (5.1), wherein the pole shafts (5.1) of the salient poles (5) are each enclosed by a single coil (6) of an excitation winding (7), wherein a star disk (10) is provided on each of the two end faces of the rotor body (4), each of which has an annular section (11), several tooth sections (12) projecting radially from the annular section (11) and winding receptacles (13) formed on the tooth sections (12) for receiving a winding head of the respective single coil (6), wherein connecting channels (15) are formed in at least one of the star disks (10),which each extend radially in one of the tooth sections (12) with respect to the rotor axis (3) and are part of a cooling path (16) formed in the rotor (1), characterized in that at least in one of the salient poles (5) a pole cooling channel (17) extending axially with respect to the rotor axis (3) through the salient pole (5) is provided, which is flow-connected to one of the connecting channels (15) of one of the star disks (10).

The embodiment of the invention relates to the technical field of battery processing, and discloses a pole roll thickness rebound prediction-based winding control method, system and device and a storage medium, and the method comprises the following steps: obtaining current device data of a target device for rolling a to-be-wound pole roll and a current measurement thickness of the to-be-wound pole roll after rolling; inputting the current equipment data into a trained thickness rebound prediction model to obtain a predicted rebound thickness of the to-be-wound pole roll; and according to the current measurement thickness and the predicted rebound thickness, the to-be-wound pole roll is controlled to be wound. According to the method provided by the embodiment of the invention, the to-be-wound pole roll can be jointly controlled to be wound according to the predicted rebound thickness and the current measured thickness, so that tab dislocation caused by thickness rebound of the to-be-wound pole roll in the winding process is avoided, the rejection rate of a wound battery cell and the solid consumption of a single roll are reduced, and the production cost is saved.

The invention relates to a single-coil excited medical springback tonometer, which belongs to the technical field of medical instruments, is used for measuring intraocular pressure parameters of a patient and comprises a shell, a probe assembly, a forehead support assembly, a central processing unit and a display screen, the probe assembly comprises a probe, a probe base, a cartridge shell, two head coils and a tail coil; the head coil and the tail coil realize magnetization of the tail part of the probe, popping up the probe, pulling back the probe and collecting signals based on an electromagnetic induction principle; the probe pops up and rebounds after making contact with the eyeballs, the change of the speed of the probe causes the change of electric signals of the head coil and the tail coil, and electric signal parameters are converted into intraocular pressure parameters by detecting the change of the electric signals of the head coil and the tail coil and processing the signals. The problems that an existing tonometer needs to anesthetize a patient and is complex in operation are solved, operation is easy, measurement is faster, and cost is lower.

Rotor (1) of an electrically excited synchronous machine (2) having a rotor body (4) that is rotatable about a rotor axis (3) and has multiple salient poles (5) arranged in the circumferential direction, each of the salient poles having a pole shaft (5.1). A single coil (6) of the winding (7) is placed around each pole shaft. A star disc (10) is provided on each of the two end faces of the rotor body (4), said star disc consisting of a ring portion (11), multiple tooth portions (12) protruding radially therefrom and winding receptacles (13) formed thereon for receiving a winding head of the single coil (6). In addition, connecting channels (15), which each run within the tooth portion (12) in the radial direction and are part of a cooling path (16) formed in the rotor (1), are formed in a star disc (10) and a pole cooling channel (17), which extends in the axial direction through the salient pole (5) and is fluidically connected to one of the connecting channels (15) in a star disc (10), is provided in each of the salient poles (5).

The invention relates to an in-situ substitution-based superconducting reactor alternating current loss simulation method, which comprises the following steps of: for a reactor structure, substituting other superconducting coils except a superconducting coil winding to be analyzed into regular geometric structures in situ by adopting a finite element method; a single-coil three-dimensional simplified model and a fine model of the reactor structure are constructed, inductance and magnetic field distribution parameters are solved through the single-coil three-dimensional simplified model, boundary conditions are set through the fine model in combination with the obtained inductance and magnetic field distribution parameters, and the reactor structure is obtained. Solving through a Maxwell equation set to obtain an electric field and current density in the superconducting tape; and calculating AC loss power, and calculating the AC loss of the coil winding of the superconducting reactor. Compared with the prior art, the method has the advantages that the efficiency and precision of alternating current loss calculation of the superconducting reactor can be improved, a key basis is provided for design optimization and performance evaluation of the superconducting reactor, and application of the superconducting technology in an electric power system is powerfully promoted.

The invention discloses an oil abrasive particle detection device based on pseudo-random signal excitation and an inversion method, a pseudo-random excitation module outputs pseudo-random alternating current excitation formed by combining a plurality of waveforms, and the pseudo-random waveforms are not less than three frequency waveforms; the sensing module is a three-coil balance type, double-coil mutual inductance type or single-coil self-inductance type inductance sensing unit, coils in the sensing module construct a detection area with an alternating magnetic field under the excitation of alternating current, and the alternating magnetic field has pseudo-random characteristics; the signal acquisition and fitting module detects an induced voltage signal of the coil, and signal pulses generated by the metal abrasive particles under different excitation waveforms are obtained through fitting according to pseudo-random alternating current excitation characteristics; and the abrasive particle feature inversion module performs inversion according to the abrasive particle pulse signals generated by fitting under each excitation, and calculates the equivalent radius, the conductivity and the magnetic conductivity corresponding to the abrasive particles, so as to determine the material and the size of the abrasive particles. According to the invention, the material, size and concentration information of the abrasive particles can be accurately obtained.

The utility model provides plastic single coil synchronous forming and binding equipment, which comprises a coil forming device and a book binding device, the coil forming device comprises a wire supply mechanism, a heating mechanism and a coil shaping mechanism, and the book binding device comprises a pressing ring penetrating mechanism, a book pressing mechanism and a shearing and bending mechanism. The wire supply mechanism comprises a wire roller and a wire winding roller, the heating mechanism comprises a heating inner core and a shell, a wire inlet and a wire outlet guider are arranged on the shell, the coil shaping mechanism comprises a wire winding shaft and three wire pressing rollers, and an outlet of the wire outlet guider is located at the front end of the wire winding shaft; the coil pressing and penetrating mechanism comprises three coil pressing rollers capable of rotating synchronously, the central axis between the coil pressing rollers and the winding shaft are coaxially distributed, the coil pressing mechanism comprises a coil pressing bottom plate and a coil pressing plate, and the shearing and bending mechanism comprises a pair of shearing and bending knives. According to the equipment, synchronous operation of coil forming and binding can be achieved, coil forming and binding stability is high, meanwhile, coils do not need to be cut into sections before binding, and material waste can be effectively reduced.

A single-torus ohmmeter for measuring a loop impedance Zx, includes a single transformer having a primary winding of Np coils and a secondary winding of a single coil forming the measurement loop, in which, to compensate for a stray induction produced by an AC leakage current circulating in the measurement loop without canceling a measurement current Ip generating an alternating induction of constant average value for the measurement of the loop impedance Zx, the transformer includes a second secondary winding of Na coils whose output voltage Ub representative of the AC leakage current is delivered to a processing module providing a voltage intended to be added to an alternating measurement voltage Vp in an adder delivering the current to be injected into the primary winding after passage through a voltage-current converter.

The utility model discloses a brushless motor stator which comprises a stator core, a plurality of arc-shaped plates are installed on the stator core, the arc-shaped plates are annularly distributed on the stator core, rectangular blocks are installed on the outer surfaces of the arc-shaped plates, clamping blocks are installed on the rectangular blocks, inserting grooves are formed in the bottoms of the clamping blocks, and the clamping blocks are inserted into the inserting grooves. And clamping grooves are formed in the sides, away from the clamping blocks, of the arc-shaped plates. When a single coil needs to be disassembled, the arc-shaped plate is pulled towards the top to release the limiting of the clamping block, the single arc-shaped plate can be taken down from the stator iron core, at the moment, the corresponding coil can be disassembled, the whole fixing block does not need to be disassembled, the replacement process of the winding coil is simplified, the winding coil is disassembled and assembled more directly and quickly, and the assembly and disassembly efficiency of the winding coil is improved. And the complexity of maintenance work is reduced, the problem of damage caused by dismounting the whole fixing block is avoided, and the maintenance cost is reduced.

The invention discloses a magnetic field coil hybrid optimization design method based on an array structure, and the method comprises the steps: combining a plurality of saddle-shaped coils into a coil array, and analyzing a magnetic field mathematical model of a single coil on the basis of considering the coupling effect of a high-permeability material on a coil magnetic field; and a magnetic field mathematical model of the saddle-shaped coil array is obtained according to a superposition principle. And optimizing the optimal current integer ratio between saddle-shaped coils in the array by combining the mathematical model with a particle swarm algorithm, converting the current integer ratio of the coils into a linear combination of the number of turns and the current of each coil, and optimizing the minimum number of turns and the optimal current required by each coil by using the particle swarm algorithm again. And finally, coil path planning is carried out through a depth-first search strategy, and an optimized magnetic field coil is generated. According to the invention, the uniformity of the coil is greatly improved, discretization errors are avoided, the structure is simple, and practical application is facilitated.

The invention relates to an anti-electromagnetic interference Rogowski coil winding method and an anti-electromagnetic interference Rogowski coil thereof.The anti-electromagnetic interference Rogowski coil winding method comprises the following steps that an enameled wire is continuously wound to form a plurality of hollow coils which are connected with one another, and each hollow coil comprises single coil layers which are continuously wound on a coil jig and are arranged in order according to the wire diameter; after winding of each single coil layer is completed, the next single coil layer is reversely wound on the outer side, the adjacent single coil layers on the inner side and the outer side are arranged in order, the number of the single coil layers is an odd number, and the number of the single coil layers is larger than or equal to 3; continuously winding a next hollow coil on a next coil jig which is staggered with the coil jig up and down as well as front and back; the plurality of coil jigs are sequentially arranged in a step shape, the plurality of hollow coils are taken off from the coil jigs after being wound on the plurality of coil jigs, and automatic production is completed. Therefore, the capability of resisting external magnetic field interference can be better improved.

The invention discloses a color steel coil production cost optimization method and device and a medium, and the method comprises the steps: determining the production cycle of a single coil according to the time information of a new coil ready signal and a coil unloading completion signal; collecting power data of production line equipment in the production cycle, and determining energy consumption cost according to the energy unit price; according to the preset auxiliary material unit price and the production parameters in the production cycle, the auxiliary material cost is determined; constructing a feature matrix and a unit area cost vector according to a preset batch of single volume production data to train a cost prediction model; according to a preset constraint condition, determining an optimal parameter combination through a gradient projection method so as to minimize the unit area cost; and according to the parameter combination, the coating process parameters and the formula parameters in the next production process are adjusted, so that cost optimization closed-loop control is achieved. The cost accounting error is greatly reduced by defining the single-roll production cycle and accounting the energy consumption and the auxiliary material consumption; and meanwhile, a closed loop is driven through data, so that the production cost of the color steel coil is optimized.

The utility model relates to an electromagnetic valve and a pneumatic comfort system. The electromagnetic valve comprises a valve body, a coil, a first valve element and a second valve element. The valve body is provided with a conduction chamber, and a first medium opening, a second medium opening and a third medium opening which are communicated with the conduction chamber; the coil is wound on the valve body; the first valve element comprises a first permanent magnet, and the first valve element can move to close or open the first medium opening under the excitation effect of the coil. The second valve element comprises a second permanent magnet which is homopolar and opposite to the first permanent magnet, and the second valve element can move to close or open the second medium opening under the excitation action of the coil. The electromagnetic valve is provided with the single coil, according to the power-on state of the coil, the first valve element is controlled to move to open or close the first medium opening, the second valve element is controlled to move to open or close the second medium opening, and the conduction relation among the first medium opening, the second medium opening and the third medium opening is controlled. And the functions of inflating, deflating and pressure maintaining can be realized.

The present invention discloses a large-scale combined fast-adjustable combined magnetic field testing device that is easy to adjust, including a bracket, an end bracket fixed on the top of the bracket, iron bars equidistantly installed on the ring side of the end bracket, wherein a coil is installed on the inner side of the iron bar, the coil is installed on the inner side of the iron bar through a coil fixing block, the iron bars are slidably connected through an iron bar connecting block, a cooling water pipe bracket is fixed on one side of the coil fixing block, and the iron bar is fixedly connected through a connecting flange. In the present invention, the coil is fixedly connected to the iron bar through the coil fixing block, and the iron bars are detachably connected through the iron bar connecting block, the number of coils can be freely adjusted, and single coil control is adopted to measure the magnetic field strength of different numbers of coils, which is convenient for adjusting the number of coils and can achieve the purpose of uniform distribution of central magnetic field strength.

The invention provides a three-axis coil error parameter identification method and device based on Kalman filtering, a medium and electronic equipment, and belongs to the technical field of motor control. According to the method, an error parameter identification model of a three-axis Helmholtz coil under the condition that a single-group coil offset error and a three-axis non-orthogonal error are superposed is constructed, and interference parameters in the error parameter identification model are identified by adopting a Kalman algorithm; according to identification interference parameters obtained through identification, a central uniform region vector magnetic field of the same three-axis Helmholtz coil under all current conditions is obtained through calculation; the method can effectively solve the problem that a traditional least square method or a neural network method is low in reliability of magnetic field simulation of the three-axis Helmholtz coil, magnetic field calculation errors caused by interference coefficient errors of the three-axis Helmholtz coil are remarkably reduced, and the identification accuracy is greatly improved.

To provide a rotary electric machine in which a cooling structure of a coil is simple and torque can be improved while suppressing a temperature rise bias in the coil.SOLUTION: A rotary electric machine includes an annular rotor 2 fixed to a rotation shaft 1 extending in a substantially horizontal direction, a stator core 3 in which slots 33 are formed between teeth 32 extending radially inward from a substantially annular yoke 31, and a coil 4 wound around the teeth 32. A cooling liquid is applied to the upper side of a coil end portion 41, and thereby the coil 4 is cooled. The quantity of heat generated when current flows through the coil 4 is varied for each of a plurality of portions split in the circumferential direction so that a temperature rise bias in the coil 4 is reduced. The area of a cross section of the slot 33, the number of conductive wires of the coil 4 passing through the slot 33 in the axial direction, or a current flowing through the coil 4 is varied for each of the plurality of portions split in the circumferential direction so that the torque is improved.SELECTED DRAWING: Figure 1

The utility model discloses a DC-DC boost circuit used for LED illumination, which adopts a three-pin inductor realized by a first coil and a second coil to replace a traditional two-pin inductor of a single coil, and connects a drain electrode of an MOS tube in a switch control circuit to a second connecting end of the inductor, that is, the drain electrode of the MOS tube is connected with an output end of the DC-DC boost circuit through the second coil. At the moment, the maximum voltage capable of being output by the output end of the DC-DC booster circuit is related to the turn number ratio N of the second coil to the first coil, N = N2 / N1, N1 is the coil turn number of the first coil, N2 is the coil turn number of the second coil, the larger N is, the higher the maximum voltage capable of being output by the output end of the DC-DC booster circuit is, and the larger N is. The value of N is set, so that the maximum voltage output by the output end of the DC-DC booster circuit can exceed the withstand voltage of the MOS tube; the driving circuit has the advantages that the driving circuit can be used for driving the LED light-emitting module with the working voltage higher than that of the MOS tube withstand voltage in the switch control circuit, and the application range is wide.

This invention relates to a single-coil spatial positioning method, apparatus, terminal device, and storage medium. The method involves acquiring multiple load voltages at different locations of the receiving coil; determining multiple offset distances corresponding to the load voltages based on a pre-established relationship between the load voltages of the receiving coil and the spatial offset distances of the coil's center point; determining the position information of the center point of the transmitting coil connected to the receiving coil based on the position information of the receiving coil at different locations and the corresponding offset distances; and moving the receiving coil according to the position information to ensure that the transmission efficiency of the receiving and transmitting coils exceeds a preset value. This method eliminates the need to know the vertical distance between the transmitting and receiving coils beforehand and avoids maintaining parallelism between them during positioning. It overcomes the accuracy reduction caused by the inability to maintain parallelism at all times in existing methods, and also reduces manufacturing costs and waste of space in the receiving end layout.

This application belongs to the field of wireless charging technology, specifically relating to a constant current and constant voltage wireless charging system and method based on a three-coil loosely coupled transformer, including an inverter circuit, a primary-side compensation circuit, a resonant circuit, a secondary-side compensation circuit, a rectifier circuit, and a filter capacitor; the resonant circuit has an anti-parallel coil structure, with the third coil located on the secondary side and a single coil on the primary side; its advantages are high misalignment tolerance, load-independent output, and high efficiency.