129 results about "Single coil" patented technology

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.

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 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 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

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.

This invention discloses a top-sealed water flow rate testing device for a water-cooled magnet coil, comprising a container assembly and a water-blocking assembly. The water-blocking assembly, used to block the coil under test, is disposed inside the container assembly, dividing the interior of the container assembly into a high-pressure water zone and a low-pressure water zone. The container assembly is provided with an inlet and an outlet, the inlet communicating with the high-pressure water zone and the outlet communicating with the low-pressure water zone. The water-blocking assembly includes a sealing cap and a sealing ring. The sealing cap is disposed on top of the central through-hole of the coil under test, and the outer side of the sealing ring is sealed to the inner wall of the container assembly, while the inner side is sealed to the coil under test. The advantage of this invention is that, through the setting of the water-blocking assembly, the inlet is connected to an external cooling water supply system. The flow rate entering the high-pressure water zone from the inlet can be measured by measuring the water flow rate entering the inlet using an electromagnetic flow meter, thereby realizing the testing of the water flow rate of a single coil under test.

The invention discloses a U-shaped coreless linear motor winding structure and a motor, and relates to the field of linear motors. The invention aims to solve the problems that a winding of an existing U-shaped coreless motor is complex to manufacture, single coil structures are different, and end structures are in cross contact, so that the operation reliability and the service life of the motor are seriously threatened. The motor winding structure comprises at least one unit winding, the end part of each coil in the unit winding is U-shaped, two end parts and two linear parts are alternately arranged and connected end to end to form a ring, and the two end parts are bent towards the same side of the two linear parts; the coils are sequentially arranged in the moving direction of the linear motor, the two groups of coils are arranged oppositely, so that the end parts of the two groups of coils face opposite directions, the end parts of the adjacent coils are not in contact with each other, and the linear parts of the two adjacent coils in one group of coils are embedded into the U-shaped groove of one coil in the other coil group at the same time; and when the number of the unit windings is greater than 1, the linear parts and the vacancies of two adjacent unit windings are mutually embedded.

The invention discloses an oil-immersed transformer winding structure and a winding device, relates to the technical field of oil-immersed transformers, and aims to solve the technical problem that the functionality of a coil assembly of a traditional oil-immersed transformer winding structure is limited. And an upper clamping piece is arranged above the lower clamping piece through an iron core. According to the oil-immersed transformer winding, the insulating layer on the outer side of the coil assembly is subjected to wrinkle treatment, so that the oil-immersed transformer winding effectively adapts to the tension and the drawing force of the bending radian in the winding process when being wound on the iron core to be bent; in this way, the shape of the single coil assembly can be conveniently adjusted so as to adapt to coil assemblies of different structures and shapes. According to the mode, the coil assembly is preprocessed under the adaptation of a certain size specification, then adjustment is carried out according to the coil assembly of the actual specification of the needed oil-immersed transformer winding structure, meanwhile, wrinkle treatment is carried out in cooperation with an insulating layer on the outer side of the coil assembly in the adjustment process, and the situation that the insulating layer is damaged is reduced.

This invention relates to an adjustable transformer coil mold device and method, belonging to the field of transformer manufacturing technology. The technical solution is as follows: a column (1) is fixed on a base (3), and the column (1) is provided with multiple sets of vertically arranged support crossbars (2). Each set of support crossbars (2) is evenly arranged along the circumference of the column (1), and the top of the column (1) is provided with a lifting eye bolt hole (5). The insulating block (6) is disc-shaped, and its diameter matches the diameter of the coil to be tightened. The insulating block (6) has several support bar grooves (9) that cooperate with the transformer support bars along its circumference. The insulating block (6) has a central hole (7), and the central hole (7) of the insulating block (6) is surrounded by crossbar grooves (8). The insulating block (6) is fixed to the column (1) by the support crossbars (2). The beneficial effects of this invention are: it can effectively ensure the concentricity of single coil sets and multiple coil sets, has a simple structure, and is easy to use.

A hybrid wireless power device comprises a single coil operated at two or more resonance frequencies. For example, a control circuit controls the voltage applied across a power transmission coil of a hub, and a frequency control circuit comprises a switch, such as a solid state relay, for switching between a first capacitance and a second capacitance for shifting the resonance frequency from a first resonant frequency to a second resonant frequency.

The application discloses a device for measuring the magnetic field distortion of a pulsed magnet, which comprises an arrayed measuring coil assembly and an analog integrator; the arrayed measuring coil assembly comprises multiple layers of PCB circuit boards which are placed in an upper-lower overlapping mode; each layer of the PCB circuit boards is engraved with N groups of coils which cover the field region of the pulsed magnet; the coils of different layers of the PCB circuit boards adopt the same spiral direction and are connected with each other through through holes; the analog integrator comprises a primary signal integrator for processing an induced voltage primary signal and a differential signal integrator for processing a differential signal; a single coil signal is connected to the primary signal integrator; the wires of different groups are reversely connected with each other, and the differential signal is connected to the differential integrator; and a corresponding measuring method is also disclosed.

The present invention belongs to the technical field of motors and discloses a method and system for designing the coil thickness of a fine-coarse double-layer winding magnetic levitation planar motor. The method comprises the following steps: S1 determining the operating mode and design indicators of the motor to be processed based on the operating scenario of the motor to be processed; S2 constructing a harmonic force model for a single coil of the motor to be processed and using the harmonic force model to solve the horizontal thrust fluctuation error of the single coil; S3 decoupling the entire coil array to obtain the relationship between coil thickness and electromagnetic force, combining the relationship between electromagnetic force, maximum load, and motor acceleration to solve the current of the motor to be processed in the electromagnetic force model, and using the current to construct a relationship between the total heating power of the motor to be processed; S4 using the design indicators as constraints and the minimum thickness of the coil of the motor to be processed as the goal, solving the horizontal thrust fluctuation error and total heating power, thereby obtaining the coil thickness of the motor to be processed and realizing the design of the coil thickness.

The utility model discloses a multi-section coil structure of an oil type transformer, which comprises an iron core column and a winding main body, two ends of the winding main body are provided with end insulation rings, the winding main body comprises a first winding and a second winding which are symmetrically arranged, a middle insulation ring is arranged between the windings, and the winding main body is divided into two sections. The length of the oil duct in the winding body is shortened, the flowing speed of transformer oil in the oil duct is increased, local overheating of the coil can be prevented, the temperature rise of the transformer is lower, the continuous safe operation capacity and the overload capacity are improved, and the continuous safe operation capacity and the overload capacity are improved. A traditional single-section high-voltage coil group is divided into two sections of structures, the number of turns of the first high-voltage coil group and the second high-voltage coil group is reduced by 1 / 2, the interlayer voltage difference is reduced to 1 / 4 of the original number, breakdown is not prone to occurring, the safety performance is greatly improved, the axial short-circuit force of the coils is reduced, the strength of a single coil is improved, and the short-circuit resistance of the transformer is enhanced.

The application discloses a high-frequency-response low-power-consumption aerodynamic proportional valve. The application is composed of a torque motor and an aerodynamic rotary valve; the torque motor comprises a permanent magnet, a magnetic conducting yoke, an upper armature, a lower armature, an upper framework, a framework column, a lower framework, an exciting coil, a coil framework, a spring support, a spring plate and a load spring. The torque motor in the application adopts a single-coil structure and the axis of the exciting coil coincides with the rotating axis of the armature, and the coil is placed between the upper and lower armatures, so that the structure is simple and compact and the miniaturization of the torque motor is easy to realize. The torque motor in the application has two upper and lower armatures, and the two upper and lower armatures have four armature arms, so that eight air gaps can be formed. The eight air gaps are paired, and under the excitation of the control coil, four pairs of parallel magnetic circuits are formed; under the same power consumption and size, the torque motor with two pairs of parallel magnetic circuits has greater output torque, so that the same output torque can be realized with lower power consumption and smaller size.

The utility model relates to a spliced stator coil holder structure, which comprises a single chip which comprises an outer arc part, a connecting part and an inner arc part, one side of the outer arc part is provided with an embedding groove, and the other side of the outer arc part is provided with an embedding body; the coil holder single group comprises a front coil holder and a rear coil holder, the front coil holder comprises a first baffle part, a first insertion part and a second insertion part, and a first slot is formed between the first insertion part and the second insertion part; the rear wire frame comprises a second baffle part, a third insertion part and a fourth insertion part; a second slot is formed between the third insertion part and the fourth insertion part; the first baffle part and the second baffle part extend out of the single chip, the first insertion part and the third insertion part are in butt joint to form a first side groove, and the second insertion part and the fourth insertion part are in butt joint to form a second side groove; the embedding groove of one single chip is matched with the embedding body of another single chip in an embedded mode, the outer arc portions of the multiple single chips are spliced to form a ring shape, and the first side groove of one single coil holder set is communicated with the second side groove of another single coil holder set to form a coil groove.

The invention discloses an extensible three-layer decoupling array coil structure, an extensible array coil and a wireless electric energy transmission system, and relates to the technical field of wireless electric energy transmission, a partial element equivalent method is introduced to extract inductance parameters of regular hexagonal coils, the relation between the overlapping size and mutual inductance of adjacent coils is constructed, and model calculation shows that the inductance parameters of the regular hexagonal coils are calculated to be larger than the inductance parameters of the regular hexagonal coils. And when the overlapping size between the adjacent coils is 32.42 mm, the coils are decoupled. In addition, for load position detection, a flexible film pressure sensor detects a load pressure value to realize position positioning, and single-coil, double-coil and three-coil local intelligent charging modes of the array system are switched according to different load positions, so that reasonable utilization of energy is realized.

This invention discloses a six-phase current-sharing common-mode integrated reactor, belonging to the fields of power electronic magnetic components, electromagnetic interference suppression, and multi-path current-sharing filtering. The reactor includes three winding working columns and two magnetically integrated columns, which are connected to form a closed magnetic circuit. The top of each winding working column has a coil start-up terminal block and a coil end terminal block, while the bottom has a coil middle tap terminal block, with coils wound on all three terminal blocks. The three winding working columns are arranged at intervals, and the two magnetically integrated columns are respectively positioned between adjacent winding working columns, enabling magnetic integration of the three winding magnetic circuits through the magnetically integrated columns. An air gap is provided in each winding working column. This invention utilizes the opposite winding directions of the coils to cancel out the magnetomotive forces. When the current is balanced, it is in an inductive state; when the current is unbalanced, the common-mode inductor functions to force current sharing; the differential-mode inductor is used to filter out noise. This invention achieves six-phase common-mode integration with a single-coil scheme, resulting in small size and low cost.

According to the self-energizing wedge type electromagnetic emergency brake, a symmetrical coil assembly passes through a center alignment push rod, an electric adjusting stud is driven by a servo motor, the screwing-in amount is controlled through a PLC, and a wedge-shaped group adopts the design that at least two sets of sectional wedge blocks are connected through a dovetail groove; the magnetic field is superposed at the push rod, the problem of radial deflection of the push rod caused by bias of a magnetic circuit of a traditional single coil is avoided, the motion straightness and stability of the push rod are improved, the electric adjusting stud is driven by the servo motor and is controlled by the PLC to be screwed in, and the pre-compression amount of the compression spring is adjusted. The clamping force of the wedge-shaped group on the brake disc can be dynamically adjusted by combining real-time feedback of a temperature sensor and a displacement sensor; compared with the prior art, the temperature of the contact point and the brake clearance can be monitored and properly adjusted, and the problem that the whole material is damaged by the temperature or the brake is reduced due to abrasion of the brake disc is solved.

The invention relates to a magnetic coupling mechanism, a wireless charging system and a vehicle, and the magnetic coupling mechanism comprises a first electromagnetic energy receiving unit which comprises a first coil unit; the second electromagnetic energy receiving unit comprises a second coil unit; wherein the first coil unit and the second coil unit are connected in parallel. According to the technical scheme, the first coil unit and the second coil unit are connected in parallel, so that an effective receiving area is expanded, coupling failure caused by deviation of a single coil is avoided, the total current flowing capacity is enhanced, and the higher-power charging requirement is met.

The application discloses an electromagnetic ultrasonic transducer, a monitoring system and a method for in-situ detection of high-temperature welds, comprising an adjustable magnetic circuit mechanism and a multi-channel coil assembly; the adjustable magnetic circuit mechanism can flexibly adjust the distance between the magnetic field generating part and the surface coating of the high-temperature weld of the detected object to adapt to the optimal working magnetic field of the coating; the multi-channel coil assembly comprises at least two independent coils insulated from each other, each independent coil constitutes an independent detection channel, and the size of the independent coil is matched with the size of the bottom surface of the magnetic field generating part to realize local concentrated detection. The application can solve the technical problems that the existing electromagnetic ultrasonic transducer is limited in transduction efficiency due to the mismatch between the magnetic field strength and the optimal working magnetic field required by the magnetostrictive coating, and the sensitivity of micro defect detection is insufficient due to the excessively large sound field action area of the single coil structure, improves the stability and reliability of the transducer in a high-temperature environment, and realizes efficient and accurate in-situ detection of high-temperature welds.

The utility model discloses a unicoil storage and splitting mechanism, including loading subassembly, material storage subassembly and splitting subassembly, material storage subassembly includes material storage plate, front baffle, front baffle cylinder, back baffle and back baffle cylinder, the front baffle is provided the feed end of material storage plate, and the both sides with front baffle cylinder transmission connection, back baffle cylinder transmission connection, back baffle cylinder transmission connection, back baffle cylinder transmission connection, back baffle cylinder transmission connection, back baffle cylinder transmission connection, back baffle cylinder transmission connection, back baffle cylinder transmission connection, back baffle cylinder transmission connection, back baffle cylinder transmission connection, back baffle cylinder transmission connection. The rear baffle is arranged at the discharging end of the storage plate, the bottom of the rear baffle is in transmission connection with the rear baffle air cylinder, the splitting assembly comprises a splitting conveying belt and a splitting motor, and the splitting motor is in transmission connection with the splitting conveying belt. According to the utility model, the cut plastic single coil is temporarily stored through the storage assembly, enough cooling time can be provided for the coil, the problems of deformation and the like during subsequent binding are prevented, the production speed of a subsequent production line can be adapted, and the problem of material accumulation or material shortage is avoided; and the temporarily stored coils can be split and conveyed through the splitting assembly, so that the coils do not interfere with one another, and the feeding stability is improved.

This utility model discloses a single-coil magnetic latching relay drive circuit with strong anti-interference and anti-shoo-through characteristics. In the first bridge arm circuit, the emitter of transistor Q11 is connected to the power supply, the base is connected to the power supply through R21, and the collector is connected to the collector of Q13 through R13. The base of Q13 is connected to the collector of Q17 and connected to the collector of Q15 through R14. The collector of Q15 is connected to the base of Q18 through R23. The emitter of Q17 is grounded. The second bridge arm circuit adopts the same circuit structure as above, wherein the bases of Q15 and Q16 are connected to RELAY_ON and RELAY_OFF through corresponding resistors, respectively. RLY- is connected between Q11 and R13, and the base of Q12 is connected to RLY- through R19. RLY+ is connected between Q12 and R15, and the base of Q11 is connected to RLY+ through R20. This invention optimizes the analog signal triggering path and adds a shoot-through protection mechanism, thereby reducing hardware costs and improving environmental adaptability while ensuring circuit stability.

The utility model relates to the technical field of linear transmission devices, in particular to a ball screw with a high-bearing elbow circulator, which comprises a lead screw and a nut, the nut sleeves the lead screw, a spiral channel is arranged between the nut and the lead screw, and a steel ball is arranged in the spiral channel; the bent pipe is arranged on the outer side wall of the nut, the two ends of the bent pipe are connected with the nut, a circulation channel is arranged in the bent pipe and communicated with the spiral channel, and the length of the circulation channel is 0.5-0.6 time of the length of a single circle of the spiral channel. A plurality of bent pipes with short internal strokes are arranged on the same side of the nut to shorten an invalid operation curve of the steel balls in the whole ball screw structure, so that the ratio of the number of the steel balls actually borne in the spiral channel to the total number of the steel balls is large, a circulation path is effectively shortened under the condition of large lead, and the service life of the ball screw is prolonged. The bearing capacity of the ball screw during operation is improved, and the nut can move more stably in the axial direction of the screw.

Embodiments of the present disclosure include a method and apparatus. An exemplary apparatus includes a solenoid assembly that includes a ferromagnetic core tube having a first channel and a second channel disposed on the radial exterior surface of the ferromagnetic core tube. The first channel and the second channel circumscribe the ferromagnetic core tube along a given portion of the longitudinal axis. The first channel and the second channel are spaced from one another along the longitudinal axis. The first channel has a first magnetic ring radially spaced apart from a first thin wall. The second channel has a second magnetic ring radially spaced part from a second thin wall. The solenoid assembly also includes a coil located radially outward of the ferromagnetic core tube.

The invention relates to the technical field of magnetic stimulation, and discloses a multi-mode transcranial magnetic stimulation control system and method, and the system comprises a main control unit, a first coil control module, and a second coil control module. The first coil control module comprises a first coil L1, a first control circuit and a second control circuit; the second coil control module comprises a second coil L2 and a third control circuit. According to the transcranial magnetic stimulation device, the loop of the single-coil stimulation circuit and the loop of the double-coil stimulation circuit in the transcranial magnetic stimulation device are improved, so that the single-coil stimulation can quickly send out and switch double-pulse stimulation, and the double-coil stimulation can accurately coordinate the stimulation time sequence.

This facilitates the insertion and installation of stator coils, which are capable of carrying high currents, into the stator. [Solution] A single coil with a flat rectangular cross-section, formed by die casting or the like, is inserted in a stepped manner from the axial direction into the stator core for each phase.