60 results about "Permanent magnet rotor" patented technology

The application relates to the technical field of rotor detection, and discloses a motor rotor core permanent magnet detection method, which is characterized by comprising the following steps: S1, fixing a magnetic field detection device at a tangent point position of the permanent magnet rotor; placing a detection probe of the magnetic field detection device at a certain position away from the rotor, the magnetic field detection device needs to be aligned with the diameter of the rotor, and the spacing between the detection probe and the rotor can ensure that the magnetic tiles placed later will not contact the detection probe; S2, a speed detection motor detects the rotating speed and rotating position of the rotor while the motor drives the rotor to rotate. The application compares multiple'magnetic field strength-mechanical angle' models, and compares the magnetic field strengths under the four mechanical angles of 0-90 DEG, 90-180 DEG, 180-270 DEG and 270-360 DEG in the same coordinate system, so that whether the four main tiles on the rotor appear the phenomenon of magnetic field deficiency can be intuitively analyzed.

This utility model belongs to the technical field of vertical mills and discloses a vertical mill drive system. The vertical mill drive system includes a housing, a main shaft, a stator assembly, a permanent magnet rotor, a transmission assembly, a thrust bearing, and a high-pressure pipeline. The housing has a motor cavity and a mounting cavity. The housing is provided with a lubrication channel communicating with the mounting cavity. The main shaft passes through the motor cavity, and one end of the main shaft extends out of the mounting cavity and is used to connect with the grinding disc. The stator assembly is installed on the inner wall of the motor cavity. The permanent magnet rotor is located inside the stator assembly and is sleeved on the main shaft. The transmission assembly is installed in the motor cavity, and the power input end of the transmission assembly is connected to the permanent magnet rotor, and the power output end is connected to the main shaft. The thrust bearing is sleeved on the main shaft and abuts against the grinding disc. The high-pressure pipeline is installed in the mounting cavity and communicates with the lubrication channel. The high-pressure pipeline is used to spray lubricating oil toward the thrust bearing. This vertical mill drive system has a simple structure, low installation and debugging difficulty, and is very convenient for operation and maintenance.

The application discloses a permanent magnet flywheel energy storage phase modifier system and a control method thereof. The permanent magnet flywheel energy storage phase modifier system comprises a controller, a converter, a flywheel, a permanent magnet speed regulating motor, a phase modifier and a shaft system. The phase modifier and the permanent magnet speed regulating motor are mounted on a power grid. The controller is used for acquiring the flywheel rotating speed, the active power and the frequency of the power grid, formulating an active power control strategy and sending a control signal. The flywheel and the phase modifier rotor are connected with the permanent magnet rotor and the armature rotor of the permanent magnet speed regulating motor through the shaft system. The converter is connected with the armature winding of the permanent magnet speed regulating motor and changes the power frequency according to the control instruction of the controller. The converter adjusts the rotating speed of the permanent magnet synchronous motor and the flywheel by changing the power frequency, so as to change the flywheel energy storage state. The energy is fed through the phase modifier and the permanent magnet speed regulating motor. The application can actively control the distribution process of the flywheel energy charging and discharging and the active power sending, and improves the inertia support capacity of the phase modifier.

This utility model relates to the field of geological exploration equipment and power generation technology, and in particular to a non-contact rotary power and signal transmission device for rotary geological steering. The device includes a main body with connecting components fixedly connected to its side. By integrating the power generation mechanism coaxially with the geological steering sub, this utility model avoids the need for additional power generation devices installed outside the drill string or in other locations downhole. This simplifies the overall drilling system structure, reduces space constraints caused by additional components, facilitates operation in confined wellbore environments, does not disrupt the normal drilling process, and eliminates the need for large-scale modifications to existing drilling techniques and equipment. The device can seamlessly integrate with existing rotary geological steering systems, ensuring uninterrupted geological steering functionality. Precise control of the air gap between the stator coil and the permanent magnet rotor is required to ensure high magnetic coupling efficiency while avoiding excessive mechanical vibration and damage.

The present invention relates to a smart motor (10) comprising a permanent magnet electromechanical converter (12) and an electronic control unit, wherein the electromechanical converter (12) comprises a permanent magnet rotor (121) and a stator (122) comprising a first assembly having at least three phases electrically coupled to each other in a star configuration, a second assembly having the same number of phases as the first assembly, wherein the phases of the second assembly are electrically coupled to each other in a star configuration, and impedances between the star neutral points of the first and second assemblies, and the electronic control unit (18) comprises a control inverter having the same number of independent control arms as the phases of the first assembly and the same number of independent control arms as the phases of the second assembly, wherein the control inverter is configured to control each phase of the first assembly and each phase of the second assembly via its own control arms, and the electronic control unit is configured to measure the voltage difference across the star neutral points of the first and second assemblies with respect to a voltage reference common to the first and second assemblies.

This invention provides a dual-rotor, yokeless, axial flux hybrid excitation motor and its manufacturing method, relating to the field of motor technology. It includes a coaxially arranged yokeless stator, permanent magnet rotor, salient pole rotor, AC armature winding, and DC excitation winding. The motor adopts a single-stator, dual-rotor structure. The stator is yokeless, resulting in a lightweight structure. Split teeth can be added to the stator teeth to reduce torque pulsation. The AC magnetic field generated by the armature winding acts on the two rotors through spatial coupling. The permanent magnet rotor provides the main excitation, while the salient pole rotor, in conjunction with the DC excitation winding, achieves air gap magnetic field modulation to obtain the same air gap magnetic flux density as the permanent magnet rotor side, resulting in the same main operating harmonics. By using hybrid excitation and magnetic field modulation, the limitations of traditional structures in terms of speed range and power density are overcome. This invention is applicable to high-efficiency energy-saving motors, wide-speed-range applications, and various drive devices.

This invention provides a grid-connected control method for a flywheel energy storage system based on a dual-rotor brushless motor, belonging to the field of novel energy storage equipment and motor control technology. The control method includes: using the kinematic equation between the stator magnetic field speed, the speed of the adjusting magnetic ring rotor, and the speed of the permanent magnet rotor as the first constraint; using the synchronization of the adjusting magnetic ring rotor speed with the power grid as the second constraint; determining the stator magnetic field speed as the sole control degree of freedom for adjusting the operating state; performing boundary judgment and correction on the stator magnetic field speed; and adjusting the stator magnetic field speed to make the speed of the permanent magnet rotor and the speed of the flywheel change along a linear invariant trajectory determined by the first constraint, thereby realizing the flywheel energy storage system's control requirements for the power grid. This invention has a clear control structure and well-defined constraint relationships, enabling multiple grid-connected support functions while ensuring the safe operation of the flywheel.

Improved rotor modules and methods of assembly are disclosed. For example, a rotor module may comprise a plurality of laminations, each configured to be concentrically disposed on the drive shaft; a plurality of magnets; two end rings; and two or more retaining strips. The plurality of laminations can be axially stacked to form a carrier having a plurality of axially-extending pockets, each configured to receive one or more of the plurality of magnets, and two or more axially extending slots, each configured to receive one of the two or more retaining strips. In embodiments, each of the two or more retaining strips can extend through both end rings and the corresponding slot in the carrier, and can be configured to retain the end rings onto both ends of the carrier. In embodiments, the strips may be secured in place by permanent deformation of one or more end.

This utility model relates to the field of medical device technology, and in particular to an artificial kidney dialysis solution preparation device, including a body assembly, the body assembly including a body body; two mounting slots are formed inside the body body; a synchronous drive assembly is provided at the bottom of the body body; and two permanent magnet rotors are provided at the output end of the synchronous drive assembly. This allows for the simultaneous and independent preparation of solution A and solution B, avoiding mixing and precipitation. Simultaneously, the stirring shaft inside the separate preparation tank is driven by a non-contact magnetic force transmission between the permanent magnet rotor and the permanent magnet ring, allowing the separate preparation tank to be removed from the mounting slot on the body body for easy cleaning and maintenance. Furthermore, the non-contact magnetic force transmission eliminates frictional losses associated with traditional gear or belt drives, extending equipment lifespan and reducing the risk of corrosive liquids eroding metal parts, significantly improving the working life of the preparation device.

This utility model discloses a two-stage permanent magnet rotor structure and a synchronous motor incorporating it. It includes two rotor cores arranged vertically and injection molded as a single unit. Each rotor core contains several circumferentially arranged hollow portions. Adjacent hollow portions are separated by connecting ribs. When the permanent magnet slots on the outer periphery of the two rotor cores correspond one-to-one, the connecting rib of the upper rotor core aligns with the hollow portion of the lower rotor core. The support column of the injection mold passes through the hollow portion of the lower rotor core and abuts against the connecting rib of the upper rotor core, thus leaving a gap between the end faces of the two rotor cores. The two-stage permanent magnet rotor structure of this utility model, by staggering the hollow portions of the two rotor cores and allowing the support column of the injection mold to pass through the hollow portion of the lower rotor core and abut against the connecting rib of the upper rotor core, can bring the support column closer to the outer edge of the rotor core, reducing deformation of the upper rotor core and the permanent magnets thereon.

A radial eccentric load working condition simulation and measurement device for a permanent magnet thrust bearing belongs to the technical field of permanent magnet thrust bearing detection. A three-way force sensor in the device is connected with a radial sliding platform, a stator base is fixed on the radial sliding platform, the stator base is fixedly connected with a permanent magnet stator, and a permanent magnet rotor is in contact with the permanent magnet stator. The radial sliding platform is fixed on a working platform to drive the permanent magnet stator to move radially. The radial force is measured by the three-way force sensor under the eccentric load condition, and the radial offset distance is recorded by the radial sliding platform. The permanent magnet rotor is connected with a rotor main shaft, both ends of the rotor main shaft are in contact with sliding bearings, and the sliding bearings are fixedly connected with a sliding bearing support. An electric cylinder is in contact with the rotor main shaft in the initial state and is in contact with the rotor main shaft in the working state. The device can simulate the radial eccentric load working condition of the permanent magnet bearing, simultaneously realize the loading of the axial force under the radial eccentric load working condition, measure the axial force and the radial force through the sensor, and quantify the relationship between the axial bearing capacity and the radial eccentric load of the permanent magnet thrust bearing.

The application relates to the technical field of cable winding and unwinding, and particularly relates to a control device based on winding permanent magnet constant torque and a use method. The control device based on winding permanent magnet constant torque comprises a permanent magnet constant torque control assembly, a winding assembly and a permanent magnet rotor assembly are sequentially sleeved from outside to inside, a gap is left between the inner circumferential surface of the winding assembly and the outer circumferential surface of the permanent magnet rotor assembly, the permanent magnet rotor assembly is adapted to be sequentially connected with a speed reducer and a reel, and the reel is adapted to wind a cable; and a control assembly, the winding assembly is connected with the control assembly through a current collector, so that the generated differential power during work is sequentially controlled and led out through the winding assembly, the current collector and the control assembly. The application provides the control device based on winding permanent magnet constant torque and the use method, so as to solve the problems that the eddy current on the induction disc of the motor generates heat during the cable winding and unwinding process, a large number of heat dissipation rib plates need to be arranged on the outer surface of the magnetic hysteresis coupler, and the magnetic hysteresis coupler is large in size and high in cost.

I. Summary of Dual-Rotor Dual-Permanent-Magnet Generator Set This invention discloses a dual-rotor dual-permanent-magnet fully automatic new energy generator set, belonging to the technical field of power generation equipment. This invention uses a DC backup power supply to initially start a three-phase synchronous motor, driving a permanent magnet generator rotor to rotate and generate electricity. The other permanent magnet rotor couples with the armature magnetic field to form a torque in the same direction, using the electromagnetic braking resistance generated by power generation as thrust to offset most of the operating resistance, significantly reducing the drive load and improving power generation efficiency. The main output terminal of the unit is equipped with a current-limiting and voltage-limiting protection device, stably outputting three-phase four-wire clean energy. Operation requires external initial start-up, resulting in mechanical and electromagnetic losses, which conforms to the law of conservation of energy. II. Summary of Dual-Rotor Dual-Excitation Winding Generator Set This invention discloses a dual-rotor dual-excitation winding fully automatic new energy generator set, belonging to the technical field of power generation equipment. This invention uses a DC backup power supply to initially start a three-phase synchronous motor, driving an electrically excited magnetic pole generator rotor to rotate and generate current. The armature magnetic field couples with the other excitation rotor to generate a torque in the same direction, offsetting the operating resistance of the excitation generator rotor and achieving partial torque balance. After rectification, the unit's power output supplies power to the three-phase synchronous motor and dual-excitation windings, and charges the backup power supply. The main power output terminal is equipped with current-limiting and voltage-limiting protection devices, ensuring a stable output of three-phase four-wire power. This invention utilizes electromagnetic resistance as thrust, significantly improving power generation efficiency. While it requires external initial startup and experiences various losses, it fully complies with the law of conservation of energy.

This application proposes a double-layer magnetic circuit salient-pole permanent magnet rotor and a semi-direct-drive permanent magnet generator including the same structure. The double-layer magnetic circuit salient-pole permanent magnet rotor includes a rotor core; an inner excitation assembly disposed on the outer wall of the rotor core, the inner excitation assembly containing a plurality of spaced radial permanent magnets and a fixing plate disposed between the radial permanent magnets, the magnetic poles of the radial permanent magnets being staggered; and an outer excitation assembly disposed on the outer wall of the inner excitation assembly, the outer excitation assembly containing a plurality of spaced magnetic pole cores, tangential permanent magnets, and a rotor slot wedge disposed at the radially outer end of the outer mounting slot, the magnetic poles of the tangential permanent magnets being staggered, and the tangential permanent magnets and the radial permanent magnets being staggered and aligned. The inner radial magnetic circuit of this rotor reduces the magnetic leakage coefficient, and the outer tangential magnetic circuit increases the magnetic flux per pole, generating a significant reluctance torque and improving the power factor and power density.

The utility model discloses a three -phase multi -group heavy load integrated switch, its technical key points are: including insulation fixed cylinder and with the first and last fixed connection's lead terminal fixed disc and mounting seat, the insulation fixed cylinder inner ring gap is equipped with the insulation dynamic contactor runner, and the runner structure on first and last symmetry of this is equipped with end permanent magnet rotor and tail permanent magnet rotor, end bearing and tail bearing, the insulation fixed cylinder still first and last symmetry is equipped with with the first permanent magnet rotor and tail permanent magnet rotor corresponding end electromagnet group and tail electromagnet lease, three groups three -phase dynamic contactor group are provided on the insulation dynamic contactor runner, the insulation fixed cylinder is provided with first phase static contact group, second phase static contact group and third phase static contact group respectively to three groups three -phase dynamic contactor group, the utility model discloses can realize the power supply effect of large -current automatic control under the PLC program control.

Described is a method of aligning a stationary rotor of a polyphase synchronous motor having a permanent magnet rotor to a configured rotor angle (θ). The method includes determining corresponding polyphase drive voltages for the synchronous motor based on a user-specified value of a two-axis synchronously rotating reference frame vector voltage (V) for a selected one of two axis of the two-axis synchronously rotating reference frame. Then, determining corresponding polyphase drive voltages for the synchronous motor; and applying said polyphase drive voltages for a predetermined, selected, or calculated time period to rotate the stationary rotor to align said rotor with said configured rotor angle (θ).

This invention discloses an intelligent isolation fast circuit breaker, belonging to the technical field of high-voltage switchgear. The circuit breaker includes a horizontal sealed gas chamber, a drive coil module, and a pluggable integrated control power supply compartment. The gas chamber is divided into an arc-extinguishing chamber, a permanent magnet mechanism chamber, and a sensor chamber. The moving contact shaft of the vacuum arc-extinguishing chamber is rigidly connected to the output shaft of the permanent magnet mechanism via an insulated coupling. The drive coil module is sleeved outside the gas chamber and drives the internal permanent magnet rotor to rotate through magnetic coupling in a non-contact manner, thereby causing the contacts to open and close. This completely eliminates the dynamic sealing points penetrating the gas chamber, greatly improving the long-term reliability of gas insulation. The integrated control power supply compartment adopts a modular pluggable design, integrating protection, communication, hybrid energy harvesting, and drive circuits. It can be quickly replaced in case of failure, greatly shortening maintenance time. This invention combines the advantages of high reliability, fast action, low maintenance cost, and intelligent monitoring, and is suitable for the protection and control of overhead lines in power distribution networks.

The utility model relates to the technical field of magnetic suspension heat pump, concretely relates to a vibration reduction and noise reduction type magnetic suspension heat pump, the magnetic suspension compressor includes the casing, sets up the stator coil in the casing inside, rotates through the bearing and sets up the permanent magnet rotor shaft in the casing inside and is located the stator coil center place, sets up the impeller at the permanent magnet rotor shaft one side end, and sets up the shock absorber disc at the permanent magnet rotor shaft other side end, the connecting place pipe of magnetic suspension compressor and condenser is provided with the spoiler disc that utilizes the outtake pipe to adjust the opening and closing angle, the utility model discloses the mechanical linkage design of shock absorber disc and spoiler disc, will combine the vibration suppression of magnetic suspension compressor and airflow noise control organically, realizes the self -adaptation vibration reduction and noise reduction under the airflow working condition of high and low speed, thereby slows down the casing vibration, dynamic restraint airflow howl.

The utility model relates to the technical field of extraction tank, concretely to a kind of sea cucumber polysaccharide low-temperature extraction tank, including extraction tank, low-temperature cavity is equipped between extraction tank inner wall and outer wall, the bottom of extraction tank is equipped with the liquid outlet pipe with valve, the middle part of extraction tank inner wall bottom is equipped with support column, the top of support column is rotatably connected with rotating disc by bearing, the top of rotating disc is placed with centrifugal inner barrel, the outer wall and bottom of centrifugal inner barrel are equipped with filter screen, the middle part of centrifugal inner barrel inner wall bottom is equipped with rotating shaft, the top of rotating shaft is equipped with permanent magnet rotor, the top of extraction tank is equipped with tank cover, the top of tank cover is equipped with the feeding pipe with cover, the middle part of tank cover top is equipped with motor, the output shaft of motor passes through the top of tank cover and coaxially connected with conductor rotor. The sea cucumber polysaccharide low-temperature extraction tank, centrifugal inner barrel can be freely taken out, combined with the design of openable and closable tank cover, it is convenient to clean residual, avoid cross contamination, guarantee the stability of multiple extraction operations.

This invention discloses a hybrid fully superconducting magnetic levitation bearing and its control method, belonging to the technical field of high-temperature superconducting magnetic levitation bearings. The hybrid fully superconducting magnetic levitation bearing includes a rotor assembly, a stator assembly disposed below the rotor, a cryogenic cooling assembly for maintaining the superconducting state, and a control assembly. The rotor assembly includes a permanent magnet rotor with a central rotating shaft in the middle. The stator assembly includes a high-temperature superconducting bulk material and a superconducting adjustment coil arranged sequentially from the inside out. A magnetic yoke is disposed on the outer and bottom sides of the superconducting adjustment coil. The cryogenic cooling assembly includes a cold-conducting component disposed at the bottom end of the high-temperature superconducting bulk material. The control assembly is used to control the current and magnetic field to adjust the axial balance position of the rotor. This invention solves the problems of non-adjustable stiffness and easy position drift in existing high-temperature superconducting magnetic levitation bearings, while reducing the heat generation and high AC loss risks associated with traditional active control.

A method for balancing the cogging torque of an electrical machine with permanent magnet rotor and slotted stator and corresponding electrical machine with balanced cogging torque. According to the method, the actual angular width of magnetic pole shoes of the rotor of the electrical machine is found from the equation Θm=k·Θme, where k is a correction factor taking account of edge effects with value 0.8 . . . 1.1, and Θme is effective angular width of the magnetic pole shoes of the rotor, determined from the equation Θme=(Q−1 / 2)Θsp, where ΘSp is stator pitch angle and ΘSp=360° / S and Q is the ratio of the number of slots S and the number of magnetic poles P and an integer, Q=S / P. The value of the correction factor k taking account of the edge effects is determined by modeling the construction of magnetic circuit of the electrical machine with a finite element method.

The present application relates to a kind of suspended hydraulic power generation device, including shell and lower joint, the shell is sequentially provided with lower half shaft, impeller, upper half shaft, generator permanent magnet rotor and generator stator;The generator stator is connected with lead wire;The shell is provided with water inlet hole corresponding to the position of impeller;Lower half shaft and lower joint are all provided with drain hole;The shell is provided with limiting piece for limiting the position of lower half shaft and upper half shaft;The shell end is provided with obturator, and the lead wire is worn out obturator.The present application has the effect of converting downhole liquid flow energy into electric energy, solving the problem of long-term supply of downhole electric energy.

The application discloses a rotating type solar continuous hydrogen production reactor and method with ultrasonic reinforced interface mass transfer and belongs to the technical field of high-temperature solar thermochemical fuel production. In view of the problems of intermittent operation between reduction and oxidation steps of hydrogen production by a traditional reactor, slow water vapor adsorption and hydrogen desorption rate in the pores of porous ceramic reactants, and limited reaction kinetics hydrogen production rate, three innovations are provided: 1, an ultrasonic transmission system: titanium alloy waveguide is used to directionally excite the acoustic flow effect and micro disturbance in the oxidation zone; 2, rotating mesh transmission: a permanent magnet rotor is coaxially fixedly connected with a silicon carbide connecting rod, and a trapezoidal protrusion-groove structure is used to drive the periodic rotation of the foam ceramic to switch the reactor partitions (the oxidation zone and the reduction zone); and 3, a double-channel gas path: argon / water vapor is injected in the partitions to accurately control the required environment of the reaction. The application can realize continuous hydrogen production and hydrogen production rate improvement and is suitable for cerium oxide and perovskite oxygen carrier reactant systems.

The application discloses a design method and system of a V-shaped built-in high-speed permanent magnet rotor containing multiple magnetic isolation bridges, and comprises the following steps: obtaining stress analytical relations of a central magnetic isolation bridge, an intermediate magnetic isolation bridge and two side magnetic isolation bridges according to structural characteristics of the magnetic isolation bridges, geometric characteristics of pole shoe regions, force balance equations of the magnetic isolation bridges, geometric coordination conditions, material physical equations and load forms; performing calculation and analysis based on the stress analytical relations to obtain design parameters of the intermediate magnetic isolation bridge and stress variation laws of the central magnetic isolation bridge, the intermediate magnetic isolation bridge and the two side magnetic isolation bridges; and determining optimal design parameters of the intermediate magnetic isolation bridge based on the stress variation laws. The five-magnetic-isolation-bridge V-shaped permanent magnet rotor is adopted, the width direction of the intermediate magnetic isolation bridge is perpendicular to the pole shoe surface of the rotor at the position of the intermediate magnetic isolation bridge, the mechanical strength of the permanent magnet rotor structure is remarkably improved, and the maximum operating speed of the permanent magnet rotor is further improved.

Improved rotor modules and methods of assembly are disclosed. For example, a rotor module may comprise a plurality of laminations, each configured to be concentrically disposed on the drive shaft; a plurality of magnets; two end rings; and two or more retaining strips. The plurality of laminations can be axially stacked to form a carrier having a plurality of axially-extending pockets, each configured to receive one or more of the plurality of magnets, and two or more axially extending slots, each configured to receive one of the two or more retaining strips. In embodiments, each of the two or more retaining strips can extend through both end rings and the corresponding slot in the carrier, and can be configured to retain the end rings onto both ends of the carrier. In embodiments, the strips may be secured in place by permanent deformation of one or more end.

This invention relates to the field of mechanical transmission and electrical energy conversion technology, and discloses a coaxial electromagnetic coupling continuously variable speed torque amplification drive power generation device, including a central main shaft, a power input mechanism, a coaxial electromagnetic coupler, and a power output mechanism. The whole device has a coaxial layout and adopts a front and rear axial split type. The coaxial electromagnetic coupler includes a rotor and an output stator. The rotor adopts a magnetic structure. The power input mechanism synchronously drives the permanent magnet rotor to rotate at high speed with a traction motor. The rotor magnetic field cuts the stator coil, generating an induced electromotive force and current in the output stator coil, realizing the efficient conversion of mechanical energy into electrical energy. At the same time, by utilizing the electromagnetic coupling effect, the speed is reduced and the torque is amplified during the power transmission process, outputting stable power with low speed and high torque, realizing the integration of power generation and transmission.

A molded interior permanent magnet rotor has a plurality of laminate segments arranged circumferentially around the rotor and a permanent magnet plastic material injection molded between the laminate segments. The permanent magnet plastic material forms radially extending portions arranged between the laminate segments and an inner annular portion positioned radially inward from the laminate segments. The permanent magnet plastic material once cured engages retention features in the laminate segments to limit radial displacement.

This invention discloses a levitation magnet self-generating multi-purpose wheel flange power generation device, belonging to the field of kinetic energy recovery power generation technology, solving the problems of existing technologies such as single operating conditions, poor adaptability, insufficient protection, and susceptibility to bumps and collisions. The device includes a permanent magnet rotor assembly, a fixed stator assembly, a gap adjustment support, and a power control and energy storage module. The modular permanent magnet rotor is mounted on the outer edge of various rotating carriers, adopting a passive and circuitless design, and is suspended in the air with the fixed stator, eliminating the risk of leakage and wire breakage. The device features multi-form deployment, multi-size adaptation, IP67-level sealing protection, and a bump-adaptive gap-stabilizing structure, achieving continuous zero-friction power generation under all operating conditions and adapting to all types of carriers.

Method for sensorless determination of the angular frequency (ωe) and / or position (φe) of a permanent magnet rotor of a brushless electric machine (1), in particular a linear or rotary machine, wherein a d-voltage (ud) and a q-voltage (uq) are provided to the electric machine (1), wherein a high-frequency d-test signal voltage (ud_inj) with a predetermined carrier frequency is applied to the d-voltage (ud) within the framework of an injection method, wherein several phase currents (i1, i2) of the machine (1) are measured and a demodulated current (iq_dem) is determined on the basis of the measured phase currents (i1, i2), wherein a d-voltage deviation (Δud) and a q-voltage deviation (Δuq) are determined on the basis of a motor model (9), in particular a mathematical one.wherein in a fusion device (6) the angular frequency (ωe) and / or position (φe) of the permanent magnet rotor is determined on the basis of the demodulated current (iq_dem) and the d-voltage deviation (Δud) and the q-voltage deviation (Δuq), wherein the fusion device (6) has a controller (22) with an integral component, in particular an integral controller, to which a sum signal is supplied which depends on the demodulated current (iq_dem) and the d-voltage deviation (Δud) and the q-voltage deviation (Δuq) and a feedback of the determined angular frequency (ωe) and / or position (φe) of the permanent magnet rotor, characterized in that the demodulated current (iq_dem) is supplied to a controller with a proportional component, in particular a proportional controller, and an output of the controller with a proportional component is used to generate the sum signal becomes.,