1038 results about "Magnetic reluctance" patented technology

The invention discloses a grinding machine internal part temperature anomaly detection method based on vibration signal analysis, which comprises the following steps that grinding data are collected through sensor deployment, and the sensors comprise a temperature sensor, a vibration sensor, an infrared thermal imaging sensor, a magnetic resistance current sensor and an inductance type particle sensor; carrying out preprocessing and feature extraction on the collected data; model construction and training are carried out based on data of preprocessing and feature extraction; according to the method, the abnormal condition of the temperature of the part is predicted by detecting the vibration signal of the internal part, the content of metal particles in lubricating oil is detected through the oil analysis sensor, and the abrasion degree of the bearing is judged in combination with the vibration signal. And motor current harmonic characteristics are monitored, and overload or rotor imbalance problems are identified.

A magnetoresistive random access memory (MRAM) includes a magnetic tunnel junction (MTJ) having a reference layer, a free layer and a tunnel barrier disposed between the reference layer and the free layer. A bottom electrode is centrally disposed to be located within a periphery of the MTJ. The bottom electrode has sloped sidewalls that slope inwardly to connect to the MTJ.

The invention discloses a molded case circuit breaker short-circuit fault positioning method, and the method comprises the steps: obtaining the current differential response data of all branches of a molded case circuit breaker control loop when a short-circuit fault occurs based on a magnetoresistive sensor, obtaining a first data set, analyzing the first data set, and extracting the wavefront features of each branch; wavefront arrival time is obtained based on wavefront features, the first data set is input into a wave velocity calibration model to obtain frequency-dependent wave velocities of all branches, and the wavefront arrival time and the frequency-dependent wave velocities are input into a short-circuit fault positioning model to obtain space coordinates of fault points; and carrying out confidence evaluation on the fault point space coordinates to obtain an evaluation result, and judging whether to send the fault point space coordinates to a terminal user based on the evaluation result. The current differential response data is obtained based on the magnetoresistive sensor, the wavefront features are extracted, the frequency-varying wave velocity calibration and path compensation optimization model is combined, the problems of insufficient signal capture, wave velocity modeling deviation and low time difference detection precision in a traditional method are solved, and the short-circuit fault positioning method has the advantage of improving the short-circuit fault positioning precision and reliability.

The invention relates to a multi-phase reluctance type micro servo motor parameter design method, system and device, and the method comprises the steps: obtaining excitation magnetic field characteristics and target performance demands of a servo motor, and carrying out the structure differentiation configuration, and obtaining mechanical structure parameters; performing multi-phase excitation electromagnetic performance calculation on the mechanical structure parameters according to motor thermal boundary conditions of the servo motor to generate an electromagnetic performance index set; performing integrated heat dissipation structure design based on the electromagnetic performance index set and the mechanical structure parameters to obtain heat dissipation structure data; and iteratively integrating the mechanical structure parameters, the electromagnetic performance index set and the heat dissipation structure data to obtain a motor structure design scheme. By integrating an electromagnetic performance index set and mechanical structure parameters in integrated heat dissipation construction, collaborative optimization of a heat dissipation network and an electromagnetic core is realized.

The invention relates to the technical field of permanent magnet motors, in particular to a salient pole rate reversible degree enhanced permanent magnet motor and a design method thereof. The salient pole rate reversible degree enhanced permanent magnet motor comprises a rotating shaft, a rotor sleeving the rotating shaft, and a stator coaxially sleeving the rotor; eight trapezoidal magnetic barriers with centers on a q axis and eight bread-type permanent magnets with centers on a d axis are embedded in the rotor along the circumferential direction in a staggered manner; the bread-type permanent magnets are magnetized along the inner and outer thickness directions, and the magnetizing directions are opposite; and two sides of each bread-shaped permanent magnet are respectively provided with a bulb-shaped magnetic barrier contacted with the bread-shaped permanent magnet. According to the invention, a plurality of variable magnetic resistances instead of a single magnetic resistance can be innovatively introduced into the rotor by ingeniously changing the armature current under different working conditions, so that the leakage magnetic flux and the effective magnetic flux of the motor are changed, meanwhile, the target of enhancing the reversible degree of the salient pole rate under all working conditions is achieved, and the diversified performance requirements under different working conditions can be met.

The invention belongs to the technical field of mechanical transmission, and discloses a conductor ring and magnetic resistance array composite permanent magnet thrust bearing and a damping force calculation method. The conductor ring and magnetic resistance array combined type permanent magnet thrust bearing realizes the bearing of non-contact magnetic thrust through the combination of the eddy current ring and the magnetic group array. When thrust from a propeller at the stern end of a propulsion shafting acts, the rotor magnetic group array axially moves, axial traction force is generated between the rotor magnetic group array and the stator magnetic resistance array to counteract the thrust action from the axial direction, meanwhile, the magnetic group array cuts the vortex ring, induction damping is generated on the surface of the vortex ring, damping force is formed, and the vortex ring is driven to rotate. And therefore, the longitudinal vibration during transmission of the propulsion shafting is reduced, and the propulsion shafting system is more silent and stable during operation. In addition, the damping force calculation method does not need complex three-dimensional structure modeling and grid division, is simple in solution, high in universality and short in calculation time consumption, and has high engineering application practical value.

The invention provides a switched reluctance motor low-speed rotor position estimation method, and belongs to the technical field of switched reluctance motor control. The method comprises the following steps: firstly, discretizing a winding voltage equation of the switched reluctance motor, obtaining predicted current of each phase through programming calculation and formula recombination of a controller, and acting the predicted current on hysteresis control of a conduction region; secondly, in combination with a partition PWM hysteresis variable-duty-ratio pulse injection method, setting three high-frequency pulses with different duty ratios to be injected into a conduction region, a follow current region and a non-conduction region respectively, and increasing the number of sampling current slope difference values when a switch tube in the conduction region is switched off; and finally, performing logic combination and comparison on the three-phase current slope difference curve generated by calculation to obtain a real-time rotor position. According to the method, the rotor position estimation precision is improved, the rotating speed range is widened, the amplitude of response current in a non-conducting region is limited, negative torque is avoided, and low-speed stable operation of the motor is facilitated.

The invention is suitable for the field of motor driving and control, and provides a dead-beat predictive current control method and system for a direct-current bias vernier reluctance motor, and the method comprises the steps: obtaining the operation data of a target motor, and carrying out the preprocessing of the obtained operation data; inputting the preprocessed operation data into an extended state observer with coupling compensation, and outputting extended state prediction parameters; inputting the extended state prediction parameter into a dead-beat prediction current control model to obtain a dq0-axis regulation voltage; carrying out coordinate transformation on the adjusting voltage of the dq0 axis, and carrying out space vector pulse width modulation to obtain a switching sequence of dual-inverter SVPWM (Space Vector Pulse Width Modulation); acting the switching sequence on a phase winding of the target motor; according to the method, disturbance caused by voltage coupling is considered in the process of predicting current and disturbance; this allows compensation of voltage coupling interference, thereby reducing the influence of interference caused by parameter changes and coupling voltage, and enhancing dynamic response capability.

A memory device includes a spin-orbit torque (“SOT”) conductor, a magnetic tunneling junction (“MTJ”) structure above the SOT conductor, a two-terminal read selector above the MTJ structure, a two-terminal write selector above the MTJ structure, and a bit line below the SOT conductor. The two-terminal read selector is conductively connected to the pinned layer in the MTJ structure. The two-terminal write selector is conductively connected to a first terminal of the SOT conductor. The bit line is conductively connected to a second terminal of the SOT conductor.

An electronic device in a wireless power system may be operable with a removable accessory such as a case. The device may convey wireless power to, from, or through the case while the device is coupled to the case. The device may have coplanar power transmitting and power receiving coils. The removable accessory may have an embedded switchable ferrimagnetic core and a coil that overlaps the switchable ferrimagnetic core. The switchable ferrimagnetic core may be operable in a first state where the switchable ferrimagnetic core is unsaturated. The switchable ferrimagnetic core may be operable in a second state where the switchable ferrimagnetic core is saturated by a magnetic field from a permanent magnet in a wireless power transmitting device. In the second state, the switchable ferrimagnetic core may have a lower magnetic permeability and higher magnetic reluctance than in the first state.

The utility model provides a motor, and relates to the technical field of motors. The motor comprises a rotor, a stator and magnetic steel. A mounting groove for mounting magnetic steel is formed in the circumferential surface of one side, facing the stator, of the rotor, at least one glue containing groove is formed in the mounting groove, and the groove bottom area of each glue containing groove is smaller than or equal to half of the groove bottom area of the mounting groove. The magnetic steel and the rotor can be bonded more smoothly, glue is saved, the magnetic circuit reluctance of the motor is reduced, and the performance of the motor is improved.

The invention discloses a super-flat wire common-winding motor and a design method, and belongs to the technical field of motor design and manufacturing. The invention discloses an equal-pole common-winding axial magnetic flux motor and a design method, the equal-pole common-winding axial magnetic flux motor comprises a motor winding, a stator, a rotor, a casing and the like, and is characterized in that the number of magnetic poles of the stator and the number of magnetic poles of the rotor are equal, all the magnetic poles of the stator or the rotor on the same disc are excited through the same annular coil winding, and the winding can be a conventional round wire, a flat wire or a super-flat wire; alternatively, two or more concentric circle winding units, such as an outer ring winding unit and an inner ring winding unit, can be arranged on the same disc, radially adjacent iron cores can be shared or can also be independently arranged, meanwhile, the radial size of the shared iron core can be wider in consideration of the magnetic saturation problem, or the radial size of the shared iron core can be smaller in consideration of the magnetic saturation problem. The radial sizes of the iron core and the winding in the small-diameter area can be larger; the working principle can be a reluctance type, a switch reluctance type, a permanent magnet synchronous type, a direct-current motor type or an alternating-current motor type; the direct current motor can be a commutator or a plane commutator; or a brushless control scheme; the alternating current motor can be square wave, sine wave or other waveform; the phase difference of the three-phase alternating current can be 120 degrees; or two-phase or four-phase alternating current or other phase difference current with the phase difference of 90 degrees.

The invention relates to the technical field of electric energy storage, and provides a flywheel energy storage motor and a use method. The rotor is rotationally connected to the interior of the shell, and magnetic resistance of the rotor is non-uniformly distributed in the circumferential direction of the rotor; the stator is arranged on the outer side of the rotor in a surrounding mode in the circumferential direction of the rotor, and the stator is connected with the shell; a stator coil is connected to one surface, facing the rotor, of the stator and is used for generating a rotating magnetic field capable of rotating around the axis of the rotor; gaps are formed between the stator and the rotor and between the stator coil and the rotor; the two ends, in the axis direction of the rotor, of the rotor are each provided with at least one magnet exciting coil, the magnet exciting coils are connected with the shell, the axes of the magnet exciting coils are parallel to the axis of the rotor, and gaps exist between the magnet exciting coils and the stator. According to the invention, the technical problems of complex structure, high manufacturing cost, poor high-temperature adaptability and great bearing burden caused by mainly adopting a flywheel permanent magnet motor in the existing flywheel energy storage technology can be solved.

The invention discloses an on-line monitoring device and method for tiny leakage of a safety valve, in the on-line monitoring device, a variable reluctance type power generation device is placed in a detection pipeline, an electric control device is arranged on the detection pipeline and is connected with the variable reluctance type power generation device through a wire, and a float flowmeter is connected with the detection pipeline through a threaded hole. The float flowmeter is connected with the automatic opening and closing device; when large-flow airflow passes through the detection pipeline, the float flowmeter controls the automatic opening and closing device to be opened through upward movement of a float. After the relief of the safety valve is completed, the electric control device sends an electric signal to the second coil to control the closing of the automatic opening and closing device; at the moment, the gas flow is calculated through the induced electromotive force of the coil; when small-flow airflow passes through the detection pipeline, the gas flow is calculated through the displacement of a floater in the floater flowmeter. On the premise that normal relief of the safety valve is not affected, flow measurement of two working conditions of fault leakage and overpressure relief of the safety valve is completed, and the detection efficiency is high.

The invention provides an asymmetric rotor structure for improving the torque density of a motor, a motor and a method, the rotor structure comprises an iron core, the iron core is provided with a shaft hole, a plurality of magnetic steel groups are distributed in the circumferential direction of the shaft hole of the iron core at equal intervals, and each magnetic steel group comprises a plurality of permanent magnet mounting groove structures, an air groove structure and a plurality of permanent magnet structures, each permanent magnet mounting groove structure is correspondingly provided with one permanent magnet structure; any number of permanent magnet mounting groove structures are configured to have a first arrangement direction on the iron core, and the air groove structures are configured to have a second arrangement direction on the iron core; wherein the first layout direction and the second layout direction are asymmetrically arranged in a space coordinate; a magnetic flux path is blocked, and magnetic flux leakage is reduced. The asymmetric design can optimize the magnetic field distribution of the permanent magnet, so that the phase difference between the reluctance torque component and the permanent magnet torque component is greatly reduced, and the effective torque superposition of the reluctance torque component and the permanent magnet torque component under wider working conditions is realized.

The invention discloses a rotating speed loop control method for stable magnetic adjustment of a magnetic flux adjustable permanent magnet synchronous motor, belongs to the field of motor control, and aims to solve the problem that reluctance torque changes drastically during online magnetic adjustment of the magnetic flux adjustable permanent magnet synchronous motor. The method comprises the following steps of: 1, training a neural network model by taking an inductance parameter and a permanent magnet flux linkage which change along with a magnetization state and a direct-axis current as a data set; step 2, obtaining motor quadrature-direct axis current according to the collected stator current and rotor position information, and obtaining prediction values of motor inductance parameters and permanent magnet flux linkage through the trained model; 3, inputting the motor quadrature-direct axis current, the inductance parameter prediction value and the permanent magnet flux linkage prediction value into a torque-current gain adjuster to obtain a reluctance torque corresponding component prediction value and an adjusted torque-current gain; 4, obtaining a given value of quadrature-axis current, and further obtaining a driving signal of the inverter; and repeating the steps 2-4, and suppressing the torque rotating speed pulsation during the magnetic adjusting period.

The present invention relates to the technical field of intelligent control of reluctance motors, and discloses an intelligent control system and method for a switched reluctance motor, comprising an acquisition module for acquiring the inductance, magnetic flux and winding current of a magnetic circuit, a data processing module for processing the acquired data and calculating the rotor angular position and outputting the electromagnetic torque, a torque monitoring unit for monitoring the electromagnetic torque of the switched reluctance motor, a control module for controlling the operation of the motor, a fault monitoring module for monitoring abnormal conditions, and an energy recovery module for recovering energy generated during motor braking. The intelligent control system and method integrate control strategies and algorithms, and can dynamically adjust parameters such as motor torque and angle according to the operating status of the motor, thereby improving the operating efficiency and response speed of the motor.

This magnetic array includes a substrate, a first unit, a second unit, a word line, a first read line, a second read line, a first gate line, a second gate line, and a source line. Each of the units includes a magnetoresistance effect element, a first switching element, and a second switching element. The magnetoresistance effect element includes a laminate and a wiring provided on the laminate. The first switching element is connected to a reference layer of the laminate. The second switching element is connected to the wiring. Each of the read lines is connected to the first switching element. The word line is connected to the second switching element. The gate lines are respectively connected to the first switching element and the second switching element of different units. The source line is connected to the wiring.

The invention discloses a position sensorless control method for a switched reluctance motor, and belongs to the technical field of motor control. According to the method, current chopping control is carried out in a conduction interval, low-threshold chopping control is carried out in a non-conduction interval, and the current hysteresis width changes along with the rotation speed, so that the rotor position estimation precision when the rotation speed is increased is ensured. According to the method, current information of each phase is collected, a current slope difference value is calculated, three-phase inductance is obtained through calculation according to the current slope difference value, the inductance obtained through calculation is compared with a preset inductance threshold value, and on-off signals of each phase and pulse signals of special position points can be obtained. According to the time interval between the rising edges of the adjacent position pulse signals and the corresponding rotor position angle difference value, the real-time rotating speed of the motor is obtained through calculation, and the motor rotor position at any moment is estimated. The method is simple in structure and convenient to implement, is not affected by inductance saturation, and is high in position estimation reliability and universality.

Disclosed in the present invention is a method for constructing a decoupling controller of a permanent-magnet-assisted bearingless synchronous reluctance electric motor. A decoupling controller formed by an IDBO-FNN dynamic prediction module and an IDBO-FNN system is connected to a composite controlled object, wherein the IDBO-FNN dynamic prediction module is formed by three parallel IDBO-FNN prediction modules, three parallel control increment calculation modules, three parallel prediction value calculation modules and a composite signal calculation module; and the IDBO-FNN system is formed by means of connecting a second-order difference processor and first-order difference processor of a fourth IDBO parameter optimization module before a fourth fuzzy neural network model, each IDBO parameter optimization module using an improved dung beetle optimizer to optimize the membership function width, membership function center value and weight of a fuzzy neural network. The structure of a fuzzy neural network is optimized, such that the degree of dependence of the fuzzy neural network on expert experience is reduced, the convergence speed of the weight and membership function of the fuzzy neural network is improved, high robustness is achieved, and various good static and dynamic performances such as rotor radial position control and electric motor speed control can be obtained.

The present invention relates to the technical field of automatic control, and provides a unified suppression method for external disturbances and internal levitation force ripples of a magnetic levitation motor system, comprising: acquiring time-varying levitation force data of a magnetic levitation motor, and converting the time-varying levitation force data of the magnetic levitation motor into nominal levitation force feedback data of a time-invariant levitation force; designing a Kalman observer on the basis of the nominal levitation force feedback data; the Kalman observer observing and acquiring external disturbance and internal levitation force ripple data of a magnetic levitation motor system; and forwards feeding and supplementing the external disturbance and internal levitation force ripple data of the magnetic levitation motor system into a levitation control system of the magnetic levitation motor, thereby achieving unified suppression of external disturbances and internal levitation force ripples of the magnetic levitation motor system. The present invention can effectively reduce the influence of external disturbances and internal levitation force ripples on a magnetic levitation switched reluctance motor, thereby effectively improving the levitation precision and the anti-disturbance performance of a magnetic levitation switched reluctance motor system.

A magnetic memory device including a tunneling magnetoresistance layer and a memory device including the magnetic memory device are provided. The magnetic memory device includes the tunneling magnetoresistance layer, including a free layer, a tunneling barrier layer, and a pinned layer, and a spin orbit torque (SOT) layer configured to provide a spin current to change a magnetization direction of the free layer of the tunneling magnetoresistance layer, wherein the SOT layer includes an orbital Hall conductance (OHC) material layer configured to provide an orbital Hall current and a conversion layer configured to convert the orbital Hall current of the OHC material layer into the spin current, and the OHC material layer includes at least one material of iridium (Ir), manganese (Mn), vanadium (V), chromium (Cr), niobium (Nb), molybdenum (Mo), ruthenium (Ru), tantalum (Ta), tungsten (W), and rhenium (Re), or an alloy thereof.

Electroacoustic drivers that can be utilized in loudspeaker systems that utilize drivers having a magnetic negative spring (MNS). The magnets of the MNS can be arranged for radial stability and / or to provide for linear magnetic forces. A variable reluctance device can be used to vary the resonant frequency of electroacoustic driver in response to a feedback signal.

The present invention discloses an inductive rotor and a switched reluctance motor, belonging to the field of switched reluctance motors. The inductive rotor of the present invention includes a rotor core and a conducting ring. The rotor core is provided with salient poles, and the salient poles are provided with pole bodies. The conducting ring is arranged on the rotor by surrounding the pole bodies of the salient poles. The switched reluctance motor of the present invention includes a rotor and a stator, and the rotor used therein adopts the above-mentioned inductive rotor. By arranging a conducting ring on the salient poles of the rotor core, an induced current is generated in the conducting ring during the working process to form induced magnetic poles, so that the magnetic circuit is concentrated on the rotor salient poles, thereby increasing the magnetic energy utilization rate and the output torque.

The invention discloses a rotor information determination method and device, equipment and a storage medium, and relates to the technical field of conveying. The method is applied to a mover information determination device, and the mover information determination device is used for identifying a mover moving on a stator and the position of the mover. The rotor is provided with a magnetic strip, and the stator is provided with a plurality of Hall sensors and a plurality of anisotropic magnetic resistance AMR sensors. The method comprises the following steps: acquiring sensing data of each AMR sensor and sensing data of each Hall sensor; determining a target position of the magnetic stripe according to sensing data of each AMR sensor; according to the target position and the sensing data of each Hall sensor, determining coded data of the magnetic stripe; and determining a target mover corresponding to the coded data according to a preset corresponding relationship between the coded data and the mover. Therefore, the technical problem of low rotor identification efficiency in the prior art can be solved.

The invention discloses a transformer processing device, and belongs to the technical field of transformers. A transformer processing device comprises a roller conveying belt and further comprises a fixed high table arranged on one side of the roller conveying belt, a guide wire coil is arranged on the inner side of the top of the fixed high table, and an insertion type rotating shaft rotationally connected with the fixed high table is arranged on one side of the lower portion of the guide wire coil. A winding clamping assembly is further arranged on the outer side of the plug-in rotating shaft. The device comprises a guide wire positioning structure, an anti-loosening structure, a silicon steel sleeving structure and an auxiliary adding structure. By means of the bidirectional guide wire attaching function of the wire loosening preventing structure and precise adjustment of the guide wire positioning structure, it is ensured that the wires are tightly and orderly arranged all the time in the winding process, and it is avoided that due to the fact that the wires are too loose, turn-to-turn insulation is uneven or an insulating layer is damaged due to the fact that the wires are too tight; the silicon steel sleeving structure is matched with accurate alignment of the pneumatic rotating disc and the insertion sleeve, so that the air gap between the silicon steel sheet and the winding is effectively reduced, and the magnetic resistance is reduced.

The present invention discloses a modeling method for a permanent magnet synchronous motor based on the d-axis magnetic network method, which relates to the technical field of permanent magnet synchronous motor modeling. It solves the technical problems of the small applicable range of the prior art and the inability to accurately diagnose faults and quantitatively evaluate the degree of faults in permanent magnet synchronous motors. By calculating the magnetomotive force of the permanent magnet, the armature magnetomotive force, and each magnetic resistance on the d-axis magnetic circuit through the size parameters and material parameters of the motor body, the present invention provides an accurate analysis method for the demagnetization fault, eccentricity fault, inter-turn short circuit and open circuit fault of the permanent magnet synchronous motor, and can effectively analyze the fault type and the degree of the fault of the motor. The modeling method using the d-axis magnetic circuit effectively avoids the influence of the q-axis current. In the d-axis magnetic network, the torque ripple will not affect the rotation result, which not only reduces the analysis difficulty, but also improves the robustness of the system, and has a wider applicable range.

The invention discloses a unipolar motor based on magnetic pole modulation and harmonic slot collaborative optimization, which comprises a unipolar rotor punching sheet, the peripheral surface of the unipolar rotor punching sheet is provided with alternate first magnetic poles and second magnetic poles, the polarities of the first magnetic poles and the second magnetic poles are opposite, the periphery of the first magnetic poles is provided with a first arc, and the periphery of the second magnetic poles is provided with a second arc. The periphery of the first magnetic pole is provided with a first arc, the periphery of the second magnetic pole is provided with a second arc, the first arc and the second arc are concentrically arranged relative to the center of the unipolar rotor punching sheet, and the radius of the first magnetic pole is greater than that of the second magnetic pole, so that the air gap magnetic resistance is increased and the motor efficiency is ensured under the condition that the effective area of the air gap magnetic flux is not obviously changed; the amplitude of each order harmonic electromagnetic radial force caused by a rotor magnetic field is reduced, and the purpose of reducing the vibration noise of the motor is achieved. The motor has wide application prospects in the fields of new energy automobiles, aerospace, numerical control machine tools and the like, and the comfort and high-end quality of products can be effectively improved.

The invention provides a motor train unit door opening and closing electromagnetic valve fault detection method, device and equipment, and can be applied to the technical field of rail transit. The motor train unit door opening and closing electromagnetic valve fault detection method comprises the steps that in response to a motor train unit door opening and closing electromagnetic valve detection request, a current signal, changing along with time, of a coil in an electromagnetic valve is obtained through measurement, and the size of the current signal is related to the working state of a valve element in the electromagnetic valve; on the basis of processing of the current signal, the working state of a valve element of the electromagnetic valve is divided into N working states, and N is an integer larger than 1; on the basis of the N sets of target current signals in the N working states, the magnetic resistance change rate index and the action performance index of the electromagnetic valve are obtained through calculation, and each working state corresponds to one set of target current signals; and determining fault information of the electromagnetic valve according to the magnetic resistance change rate index and the action performance index.

The invention provides a brush reluctance motor, and belongs to the technical field of motor equipment, the brush reluctance motor comprises a stator and a rotor, the stator mainly comprises a stator core, a carbon brush support, a carbon brush and a stator end cover; the rotor mainly comprises a rotor iron core, a rotor armature coil winding, a phase converter and a rotating shaft; the inner side of the stator core is provided with at least two salient poles, and the salient poles are not wound with any form of coil windings; the carbon brush is assembled on the carbon brush bracket, and the carbon brush bracket is fixed on the stator end cover; the stator core is fixed in the shell; the rotor iron core and the phase converter are assembled and fixed on the rotating shaft; an armature coil winding is wound on each rotor core salient pole; a brush AC / DC dual-purpose motor which is simple in structure and good in energy-saving effect is designed and manufactured by utilizing the structural form of a brush motor and the principle that a reluctance motor generates electromagnetic pulling force.