405results about "Magnetic bearings" patented technology

The invention relates to the technical field of magnetic suspension bearings, and provides a magnetic leakage prevention bearing structure which comprises a flux sleeve, a shell, a magnetic part, an inner-layer magnet yoke and an outer-layer magnet yoke. The shell is sleeved outside the flux sleeve, and an inner ring of the shell is provided with a mounting space; the magnetic part is arranged in the mounting space; the inner-layer magnet yoke is arranged in the mounting space and connected with the shell, the inner-layer magnet yoke is concaved inwards to form a first containing groove, and the magnetic part is contained in the first containing groove; the outer-layer magnet yoke is arranged in the installation space and connected with the shell, the outer-layer magnet yoke is concaved inwards to form a second containing groove, and the inner-layer magnet yoke is contained in the second containing groove. A closed magnetic circuit is formed through a double-layer magnet yoke nested structure, the axial magnetic shielding layer design is matched, magnetic flux leakage is effectively restrained, the magnetic field energy utilization rate is increased, electromagnetic interference to external equipment is reduced, and meanwhile the bearing performance and operation stability of the bearing are remarkably improved by optimizing magnet yoke thickness distribution and the permanent magnet arrangement mode.

The invention discloses a modular five-degree-of-freedom magnetic suspension compressor rotor system and a control method, and belongs to the field of compressor rotors, the modular five-degree-of-freedom magnetic suspension compressor rotor system comprises a magnetic suspension rotor main shaft and a driving motor arranged in the middle of the magnetic suspension rotor main shaft, and a centrifugal impeller and a cooling impeller are installed at the two ends of the magnetic suspension rotor main shaft correspondingly; the magnetic suspension rotor main shaft between the driving motor and the centrifugal impeller and the magnetic suspension rotor main shaft between the driving motor and the cooling impeller are respectively and sequentially provided with an axial magnetic bearing assembly and a radial magnetic bearing assembly; the axial magnetic bearing assembly is of a non-thrust disc structure in which a magnetic field is directly coupled; the radial magnetic bearing assembly is of a modular structure with partitioned magnetic poles. According to the modularized five-degree-of-freedom magnetic suspension compressor rotor system and the control method, the axial magnetic bearing assembly directly coupled with the magnetic field is adopted, a thrust disc is omitted, the assembly process of the axial magnetic bearing is simplified, meanwhile, the partitioned magnetic poles are adopted, redundancy control is achieved, and stability is higher.

An axial active magnetic bearing includes a rotating shaft, a magnetic yoke, a permanent magnet, a magnetic barrier structure and an electromagnetic coil. The rotating shaft includes a main shaft and a thrust plate; first and second air gaps with a projected area size having an error smaller than 5% are formed between the magnetic yoke and the thrust plate; the permanent magnet is provided on the magnetic yoke, and a third air gap is formed between the thrust plate and the permanent magnet; a permanent magnet magnetic flux is formed between the permanent magnet and the magnetic yoke; the magnetic barrier structure is provided on the magnetic yoke and positioned in the path of the permanent magnet magnetic flux, the permanent magnet magnetic flux is passed through the barrier structure, the first air gap and the third air gap; the electromagnetic coil is provided in a magnetic yoke chamber.

The invention discloses a radial two-degree-of-freedom hybrid magnetic bearing with external permanent magnets. The radial two-degree-of-freedom hybrid magnetic bearing comprises a stator and a rotor. The rotor comprises a rotor iron core, a rotating shaft, two rotor U-shaped grooves, two rotor magnetic isolation aluminum rings and two rotor permanent magnet rings, the stator comprises a stator iron core, a coil, two stator U-shaped grooves, two stator magnetic isolation aluminum rings and two stator permanent magnet rings, and the polarities of the stator and the rotor permanent magnet rings which are opposite up and down are opposite; the permanent magnet rings are respectively embedded into the corresponding U-shaped grooves and are arranged on two sides of the stator core and the rotor core through the magnetic isolation aluminum rings, eight magnetic poles are uniformly distributed in the stator core, eight coils are wound on the magnetic poles, the coils on two poles in the + X,-X, + Y and-Y directions are respectively and reversely connected in series to form suspension windings in the + X,-X, + Y and-Y directions, and then the suspension windings are driven by the four switch power amplifiers. The radial two-degree-of-freedom hybrid magnetic bearing provided by the invention has the advantages of no coupling of permanent magnetic flux and suspension magnetic flux, high suspension precision, low power consumption, easiness in processing and assembling and high suspension force density.

The axial self-balancing three-degree-of-freedom magnetic bearing is characterized in that a stator part comprises a stator yoke, a left attraction iron core, a right attraction iron core, a left repulsive iron core and a right repulsive iron core which are all mounted on an aluminum alloy bracket, and four poles wound with coils are uniformly distributed on the inner circumference of the stator yoke; an axial control winding is embedded in the attraction iron core, and a stator permanent magnet is embedded in the repulsive iron core. The rotor part comprises a rotor core and a rotating shaft, a radial air gap and an axial air gap are respectively arranged between the rotor core and the radial iron core, between the attraction iron core and the repulsive force iron core, rotor permanent magnets are arranged on two sides of the rotor core and at positions corresponding to the stator permanent magnets of the repulsive force iron core, and the polarities of the stator permanent magnets and the rotor permanent magnets facing the axial air gap are the same. The radial magnetic flux magnetic circuit, the axial control magnetic flux magnetic circuit and the permanent magnetic flux magnetic circuit are completely independent and free of coupling, axial static balance of the rotor is achieved, suspension is achieved in the radial direction, control is easy, and the controllable suspension force is large.

The invention discloses a five-degree-of-freedom permanent magnet biased magnetic suspension blood pump which comprises a pump shell, a rotor impeller, a magnetic suspension bearing and a motor used for driving the rotor impeller to rotate and do work, the magnetic suspension bearing comprises a bearing stator and a bearing rotor, and the bearing stator is fixed in an inlet pipe; the stator comprises an annular stator core and stator magnetic rings distributed at the two axial ends of the stator core, a plurality of first stator teeth are arranged on the inner wall of the stator core in the radial direction, and each first stator tooth is wound with a first coil; the bearing rotor is fixed in the pump rotor, the bearing rotor comprises a rotor iron core, rotor teeth are arranged on the outer circumferential surface of the rotor iron core, and the multiple first stator teeth are arranged opposite to the rotor teeth in the radial direction; the stator magnetic rings located at the two axial ends of the stator iron core are magnetized in the axial direction, the magnetizing directions are opposite, and closed magnetic loops can be formed between the stator magnetic rings and the stator iron core and between the stator magnetic rings and the rotor iron core. Five-degree-of-freedom suspension control can be achieved, the size is small, and power consumption is low.

The invention discloses a motor magnetic bearing assembly calibration method and system, electronic equipment and a medium, and the method comprises the steps: building a correlation model between a control current and a motor three-phase current under a rotor rotating coordinate system during the calibration of a magnetic bearing; the rotation angle of the rotor is adjusted by changing the control current, the motor correspondingly adjusts the three-phase current according to the control current, and rotation operation on the rotor is executed; taking the initial position of the rotor in a rotating coordinate system as a 0-degree position, sequentially controlling the rotor to rotate for a circle according to 45-degree intervals, controlling the rotor to suspend to a balance position through a magnetic bearing controller at the 0-degree position and after each rotation, and calibrating the magnetic bearing at each angle, according to the invention, the control strategy of the motor to the rotation of the rotor can be simplified, the position of the rotor can be accurately controlled, manual participation is reduced, the operation time is saved, and the efficiency and accuracy of multi-angle calibration are greatly improved.

The invention relates to the technical field of flywheel energy storage, in particular to a stability control method for a magnetic suspension flywheel energy storage system with time delay feedback. Determining axial bearing capacity and radial bearing capacity demand parameters of the flywheel energy storage device based on gravity and impact load of the flywheel rotor and centrifugal force and unbalanced force generated during high-speed rotation; according to the bearing capacity demand parameters, U-shaped stator structure design is carried out on the axial electromagnetic bearing, an inner ring and outer ring magnetic pole equal-area structure is adopted, the axial electromagnetic bearing is made of electrical pure iron, octupole electromagnetic bearing design is carried out on the radial electromagnetic bearing, and a stator and a rotor are made of silicon steel sheets formed through pressing; and carrying out temperature field distribution simulation analysis on the axial electromagnetic bearing and the radial electromagnetic bearing by adopting a bidirectional coupling mode of an electromagnetic field and a temperature field. The method further comprises the steps that an auxiliary bearing protection system is arranged, differential working mode control is adopted, and dynamic adjustment of the bearing capacity of the electromagnetic bearing under different working conditions is achieved by adjusting bias current and control current.

The invention discloses a magnetic suspension flywheel energy storage device which comprises a shell, a flywheel disc rotor assembly, a permanent magnet synchronous motor assembly, a radial magnetic suspension bearing system, an axial magnetic suspension bearing system and a vacuum operation system. The motor rotor is arranged on the flywheel disc rotor assembly; the radial magnetic suspension bearing system and the axial magnetic suspension bearing system are used for supporting the flywheel disc rotor assembly; the vacuum operation system is used for vacuumizing the inner cavity of the shell; and the cooling system is used for cooling the motor stator. When the permanent magnet synchronous motor assembly drives the flywheel disc rotor assembly to operate, the flywheel disc rotor assembly is in a suspension state, meanwhile, friction damage of the flywheel disc rotor assembly during operation can be reduced through the vacuum environment, and the energy storage efficiency can be effectively improved. The cooling system is used for cooling the motor stator with high heat productivity, so that stable operation of the motor stator can be effectively guaranteed, and reliable operation of the energy storage device is further guaranteed.

The invention discloses a double-sliding-table linear module and a control method, and the double-sliding-table linear module comprises a base which is provided with an electromagnetic coil group on the inner surface; permanent magnet arrays are fixed at the bottoms of the first sliding table and the second sliding table, and the first sliding table and the second sliding table suspend above the base through electromagnetic force; the two ends of the elastic linkage rod are hinged to the two sliding tables through universal joints, and a piezoelectric ceramic sensor is arranged in the rod; the piezoelectric actuators are embedded into the four corners of the base and used for generating reverse damping waves to suppress vibration; and the vibration accelerometer is installed at the center of the sliding table, the FFT analysis module and the damping wave generation module are connected, and the damping wave generation module outputs a reverse phase signal to the piezoelectric actuator. According to the invention, the electromagnetic coil group and the permanent magnet array interact to generate suspension force, so that the sliding table is suspended on the base; the piezoelectric sensor detects deformation and triggers compensation; the piezoelectric actuator generates reverse mechanical waves to counteract vibration energy so as to construct a non-contact driving double-sliding-table infrastructure, friction is eliminated through magnetic suspension, and the elastic linkage rod reduces the cooperation error.

Disclosed are a magnetic bearing and a compressor. The magnetic bearing comprises a first axial iron core and a radial iron core, wherein the first axial iron core has a first accommodating space, in which an annular positioning boss is arranged; the annular positioning boss has an axial positioning surface and a radial positioning surface; and a magnetic conductive ring is arranged in the first accommodating space, the magnetic conductive ring can be connected to both the axial positioning surface and the radial positioning surface in a fitting manner to achieve positioning of the magnetic conductive ring in both an axial direction and a radial direction of the first axial iron core, and the magnetic conductive ring is sleeved on an outer circumferential wall of the radial iron core. In the magnetic bearing and the compressor, the positioning of the radial iron core is more accurate, so as to effectively avoid the problem of great positioning accuracy error of a radial iron core in the prior art due to association of the positioning with magnetic steel.

The invention provides a midpoint potential balancing system based on a multi-level magnetic suspension bearing driver, and belongs to the technical field of magnetic suspension bearing control, and the system comprises a three-level four-bridge-arm driver which comprises a switch bridge arm module and a capacitor bridge arm module which are connected in parallel and is used for obtaining winding current data, the neutral-point voltage balancing module is in communication connection with the current controller and is used for adjusting the voltage of the switch bridge arm module based on the voltage control signal so as to balance the neutral-point potential of the capacitor bridge arm module, and the neutral-point voltage balancing module is in communication connection with the current controller and is used for balancing the neutral-point potential of the capacitor bridge arm module based on the average voltage of the switch bridge arm module. The neutral-point voltage balancing module is used for balancing the neutral-point voltage to obtain zero-sequence voltage, the duty ratio updating module is in communication connection with the neutral-point voltage balancing module and is used for obtaining switching time based on the zero-sequence voltage and average voltage of the switching bridge arm module, and the modulation module is in communication connection with the duty ratio updating module and is used for receiving the switching time and obtaining a voltage control signal based on the switching time.

The invention discloses an elastic support liquid magnetic composite bearing journal bearing which comprises a bearing bush, a base body arranged on the outer side of the circumference of the bearing bush and a support layer arranged between the base body and the bearing bush, the bearing bush comprises a first permanent magnet layer and a lining layer arranged between the first permanent magnet layer and a journal, the lining layer is provided with a liquid film, the liquid film is arranged between the lining layer and the journal, and the first permanent magnet layer is arranged on the lining layer. The first permanent magnet layer comprises a permanent magnet and a protective shell thereof; a second permanent magnet layer is further arranged on the inner side of the circumference of the liquid film, and the supporting layer comprises an elastic layer arranged between the bearing bush and the base body; the elastic layer comprises elastic elements; according to the bearing, the liquid film is arranged between the lining layer and the shaft neck, and the permanent magnets are arranged in the first permanent magnet layer and the second permanent magnet layer, so that a dynamic complementary mechanism of liquid film dynamic pressure and magnetic suspension force is formed, and the comprehensive bearing capacity is improved.

The electromagnetic bearing rotating part comprises a target shaft sleeve, a magnetic steel shaft sleeve assembly and an auxiliary bearing shaft sleeve which are sequentially installed on a rotating shaft, and the assembling tool comprises a tool shaft sleeve, an extrusion assembly and a driving part. The tool shaft sleeve can be arranged on the rotating shaft in a sleeving mode and abut against the target shaft sleeve, at least part of the extrusion assembly can be arranged on the rotating shaft in a sleeving mode and abut against the magnetic steel shaft sleeve assembly or the auxiliary bearing shaft sleeve, and the driving part is used for applying axial pressure to the tool shaft sleeve and / or the extrusion assembly. According to the assembly tool, the problem of assembly defects occurring in the hot jacket cooling process of the electromagnetic bearing rotating part is solved, it can be ensured that the relative positions of the electromagnetic bearing rotating part and the rotating shaft are kept unchanged, the assembly precision is improved, it can be ensured that silicon steel sheets are always tightly laminated, and therefore the performance and reliability of an electromagnetic bearing are ensured.

An electric motor system includes a first thrust magnetic bearing portion and a second thrust magnetic bearing portion, an electric motor arranged between both bearing portions, and a detection unit that detects the axial position of a drive shaft. Greater external force acts on the drive shaft in a first direction than in a second direction. The first bearing portion produces electromagnetic force on the drive shaft in the first direction. The second bearing portion produces electromagnetic force on the drive shaft in the second direction. The electromagnetic force of the second bearing portion is greater than the electromagnetic force of the first bearing portion. The detection unit is arranged on a side closer to the second bearing portion with respect to the first bearing portion.

A vacuum pump (1), preferably a turbo molecular pump, comprises a rotor shaft (9) configured to have one or more rotor blades (8) coupled thereto, and the rotor shaft (9) defines a bearing seat (7) housing a permanent magnet bearing in an interference fit configuration, the magnetic bearing insert comprises one or more permanent magnet alloy rings (3, 4, 5) of a rotor bearing half of a permanent magnet bearing and a radially outwardly extending sleeve (16) coupled thereto around an outer periphery of the or each permanent magnet alloy ring (3, 4, 5), and the outer surface of the permanent magnet bearing insert (3) engages with the inwardly facing wall of the bearing seat (7) to provide an interference fit wherein the coefficient of thermal expansion of the radially outwardly extending sleeve (16) is at least substantially the same as the coefficient of thermal expansion of the material of the rotor shaft (9) defining the engaged bearing seat wall.

The invention discloses a power supply system for a magnetic suspension bearing controller. The power supply system comprises an alternating current / direct current voltage conversion unit, a switch control unit, a voltage selection unit, an energy storage unit, a motor, a rectification filtering unit and a direct current / direct current voltage conversion unit, the rectifying and filtering unit rectifies and filters alternating-current voltage output by the motor to generate second direct-current voltage, the direct-current / direct-current voltage conversion unit boosts or reduces the second direct-current voltage to generate third direct-current voltage, and the switch control unit controls on-off of branches where the rectifying and filtering unit and the direct-current / direct-current voltage conversion unit are located. According to the power supply system provided by the invention, natural seamless switching among three power supplies can be realized in the whole process of a magnetic suspension motor system from normal working to tripping power failure to the speed reduction of a rotor below a safe speed value and stopping on an auxiliary bearing, so that safe shutdown of a magnetic suspension motor under a power loss condition is ensured.

A magnetic bearing device is proposed for the contactless magnetic bearing of a rotor (3) comprising a disk-shaped or ring-shaped magnetically effective core (31), wherein the magnetic bearing device has a stator (2) comprising a plurality of coil cores (25), each of which comprises a longitudinal leg (26) extending from a first end (261) in an axial direction (A) to a second end (262), and a transverse leg (27) arranged at the second end (262) of the longitudinal leg and extending in a radial direction perpendicular to the axial direction (A), wherein at least one concentrated winding (61) is provided on each longitudinal leg (26) surrounding the respective longitudinal leg (26), wherein the stator (2) further comprises a cup-shaped recess (211) into which the rotor (3) can be inserted.wherein the cup-shaped recess (211) is arranged at an axial end of the stator (2), wherein the transverse legs (27) are arranged around the cup-shaped recess (211), and wherein a plurality of magnetic field sensors (8) for determining the position of the rotor (3) are arranged around the cup-shaped recess (211). An annular holding device (9) for the magnetic field sensors (8) is provided, and that in the magnetic bearing device, a circuit board (7) is arranged between the windings (61) and the transverse legs (27) with respect to the axial direction (A), on which all magnetic field sensors (8) are arranged, and that the holding device (9) is designed to receive the circuit board (7). Furthermore, a centrifugal pump with such a magnetic bearing device is proposed.

The invention relates to a three-degree-of-freedom target disc type vertical active magnetic suspension bearing structure. A multi-end pole shoe type electromagnetic circuit assembly comprises a magnet yoke, and a plurality of pole shoes are led out from the single side of the magnet yoke; the plurality of multi-end pole shoe type electromagnetic circuit assemblies are uniformly distributed on the mounting plate at equal angles; the mounting plate is fixed on an external supporting structure, and a round hole is formed in the center of the mounting plate; the rotor assembly comprises a rotating shaft and a rotor magnetic gathering disc which are fixed into a whole; one side of the rotor magnetic gathering disc is provided with a plurality of concentric annular magnetic gathering teeth which directly face the pole shoes one by one, and the rotating shaft vertically penetrates through the circular hole and is matched with the circular hole. According to the invention, magnetic focusing coupling is formed by magnetic flux at the end parts of the electromagnets and the inner and outer ring magnetism gathering teeth of the rotor, so that magnetic force concentration and effective bearing are realized, non-contact suspension support is obtained by using fewer actuators and more direct magnetic circuit action, the system complexity and the manufacturing cost are reduced on the structure level, and the reliability of the system is improved. And meanwhile, the adaptability to miniaturized machinery and lower control precision conditions is improved.

This application provides a displacement sensor and a magnetic levitation system. The magnetic levitation system includes a magnetic levitation bearing and a displacement sensor. The displacement sensor includes: a first magnetic source mounted on the rotor shaft of the magnetic levitation bearing, used to generate a magnetic field; a substrate fixedly disposed at a distance from the first magnetic source, with a central hole for the rotor shaft to pass through; and a Hall array including multiple Hall chips, each attached to and electrically connected to the substrate. The Hall chips are distributed around the central hole, and each Hall chip can detect the magnetic flux density at its respective location to obtain position information of the first magnetic source and the rotor shaft. Compared to traditional magnetic levitation bearings, this application uses fewer displacement sensors, thus reducing the installation space occupied by the displacement sensors. It is also suitable for applications where the rotor shaft is extended.

This invention provides a combined bearing, comprising a housing, a motor, a spindle, an axial support assembly, and a radial support assembly. The motor is mounted on the middle of the spindle, and the axial and radial support assemblies are respectively mounted on both ends of the spindle along its axial direction. The axial support assembly includes an axial magnetic levitation bearing, an angular contact ball bearing, and an axial displacement sensor. The radial support assembly includes a radial magnetic levitation bearing, a deep groove ball bearing, and a radial displacement sensor. The inner rings of both the deep groove ball bearing and the angular contact ball bearing are formed by the spindle, and the outer rings of the angular contact ball bearing and the axial magnetic levitation bearing are anti-rotationally fitted, as are the outer rings of the deep groove ball bearing and the radial magnetic levitation bearing. Addressing the shortcomings of existing technologies, this invention provides a combined bearing with compact axial dimensions, long service life, and strong fault tolerance.

The invention discloses a magnetic suspension and air suspension hybrid bearing system and a rotor structure and a control method thereof, and relates to the technical field of fans, and the system comprises a permanent magnet biased rotor structure, a stator core, a magnet exciting coil and an air dynamic pressure foil bearing assembly. The foil of the bearing assembly is made of a magnetic conductive material, so that the foil and the magnet exciting coil share the same radial air gap, and the air gap serves as a magnetic field channel and a dynamic pressure air film space at the same time. According to the operation control method, based on a rotating speed signal, magnetic suspension bearing is achieved through the magnet exciting coil in the starting and low-speed stages, and gas film complete bearing is switched in the high-speed stage. Through structure fusion and time-sharing control, the problem of magnetic circuit shielding is solved, the advantages of magnetic suspension friction-free starting and stopping and high speed and high efficiency of an air floating bearing are integrated, the state monitoring function is achieved, the system is compact and reliable, and the cost is optimized.

A passive magnetic bearing assembly (10) for a vacuum pump and a vacuum pump having such a bearing are disclosed. The invention relates to a passive magnetic bearing assembly having a plurality of pairs of ring magnets (20, 30) arranged in a stack, one of the ring magnet pairs being arranged on a stator side (4) of the bearing and the other of the ring magnet pairs being arranged on a rotor side (2). The ring magnets are radially magnetized and each rotor ring magnet comprises at least a first harmonic of magnetic inhomogeneity, where the magnetic inhomogeneity is measured as a ratio between a 0-peak variation of remanence [Delta] Bi and an average remanence BR0, the first harmonic of magnetic inhomogeneity being less than 3%.

A rotor for a thrust magnetic bearing is a rotor (51) of a thrust magnetic bearing (50) supporting a rotary shaft (30) that is driven to rotate by a motor (20) in an axial direction, and has a rotor passage (93) that penetrates the rotor (51) and constitutes part of a refrigerant passage (Z) for sending a refrigerant to the motor (20). It is preferable that the rotor passage (93) includes an opening (93b) on one side in the axial direction and an opening (93a) on the other side in the axial direction, and the opening (93b) on the one side is located radially outside (Q2) of the opening (93a) on the other side.

The invention discloses a variable-rigidity connecting assembly, a machine tail connecting device and a using method. The variable-rigidity connecting assembly comprises a supporting body, a permanent magnet, a magnet exciting coil, an elastic sleeve and a magnetic current layer. The magnet exciting coil located on the outer side of the permanent magnet can generate a magnetic field in the same direction or in the opposite direction with the permanent magnet after being electrified, the magnetic current layer acts on the elastic sleeve under the influence of the magnetic field, the elastic sleeve is subjected to expansion and retraction deformation, variable-rigidity controllable connection between rigidity and flexibility at the connecting position is achieved, and the variable-rigidity permanent magnet motor is suitable for different use environments and has good application prospects. The problems of force suffocation, jamming and the like or the deformation of a connecting position are avoided; according to the tail connecting device, a connecting assembly with variable rigidity is arranged in a positioning hole formed in the butt joint of a first belt frame and a second belt frame in a sleeved mode, variable rigidity connection between rigidity and flexibility between the self-moving tail belt frames is achieved, control and adjustment can be conducted according to different working conditions, and the problems of force suffocation, jamming and the like are avoided.

An active magnetic bearing apparatus for supporting a rotor of a rotary machine comprises an axial magnetic bearing unit and a radial magnetic bearing unit mounted directly to one another. One of the axial magnetic bearing unit and the radial magnetic bearing unit is mounted to a support for attachment to a housing of the rotary machine.

A magnetic levitation device for contactless magnetic levitation of a rotor, the rotor comprising a disc-shaped or annular magnetically effective core, the magnetic levitation device comprising a housing, a stator and a control device, the stator comprising a plurality of coil cores, each having a longitudinal leg extending in an axial direction from a first end to a second end, and a transverse leg arranged at a second end of the longitudinal legs, at least one concentrated winding being provided at each longitudinal leg, the winding surrounding the respective longitudinal leg, the stator further having a cup-shaped recess into which the rotor can be inserted, the cup-shaped recess being arranged at an axial end of the stator, the control unit comprising a circuit board having a front side and a rear side, a circuit breaker for controlling the winding is arranged on the front side, and the housing comprises an outer wall, a stator housing for receiving the stator, a control housing for receiving the control unit, and a partition wall separating the stator housing from the control housing. A web is disposed on the partition wall and adjacent to the outer wall, the web protruding into the control housing, and a rear side of the circuit board is supported on the web.

A magnetic levitation device and a rotor position adjustment method are provided. In the axial direction (Z) of the stator (2), a permanent magnet stator body (20) of the stator (2) is disposed between a first magnetic stator substrate (21) and a second magnetic stator substrate (22) of the stator (2). The first magnetic stator substrate (21) includes a first substrate body (210), a first protruding portion (211) and a second protruding portion (212) protruding from the first substrate body (210) toward the rotor (1). A first magnetic levitation coil (211c) is wound around the first protruding portion (211), and a second magnetic levitation coil (212c) is wound around the second protruding portion (212). In the axial direction (Z) of the stator (2), the first protrusion (211) is higher than the second protrusion (212), so that the first protrusion (211) and the first magnetic levitation coil (212) apply an upward force to the rotor (1), while the second protrusion (212) and the second magnetic levitation coil (212c) apply a downward force to the rotor (1).