4808 results about "Magnetic levitation" patented technology

The invention relates to the technical field of automatic control, in particular to an efficient magnetic suspension water chilling unit control system which comprises a refrigerant flow monitoring module, a dynamic flow adjusting module, a start-stop delay judging module, a temperature gradient sensing module and a frequency self-adaptive adjusting module. According to the method, the temperature difference curve is established through real-time monitoring data, the refrigerant flow synchronism is analyzed, temperature difference abnormity can be accurately recognized, the refrigerant adjusting requirement is extracted, traditional threshold value judgment lag is avoided, the refrigerant flow is controlled in real time, fluctuation impact is buffered, and the adjusting precision is improved by dynamically adjusting the opening degree of the electronic expansion valve and the rotating speed of the circulating pump; the method has the advantages that starting and stopping conditions are accurately judged, misoperation is reduced, early positioning of thermal imbalance is achieved through temperature difference sensing of an evaporator, a compression cavity and a condenser and establishment of an internal temperature difference distribution diagram, energy efficiency reduction is avoided, the frequency of a frequency converter is adjusted according to temperature difference distribution, the optimal load is matched, frequency adaptivity and system load response are improved, and refrigeration cycle energy efficiency is optimized.

The invention discloses an intelligent air conditioner water chilling unit control method and system based on predictive optimization. Operation data and weather forecast data are collected to establish a dynamic response reference, building cold load sudden change opportunity is recognized, the mismatching relation between magnetic suspension frequency and wet bulb temperature is detected, and energy-saving opportunity recognition data is generated to determine a cooling starting judgment table; identifying equipment response delay characteristics by using a dynamic response reference, extracting time sequence advantage parameters to determine dislocation configuration among multiple pieces of equipment, and generating coordination control parameters; cloud-local transmission delay analysis is carried out according to the coordination control parameters, and a coordination control sequence is generated through buffer opportunity identification and delay compensation; mechanical refrigeration suppression data is generated through energy efficiency mode classification, free cooling potential mining is implemented to form a cold source optimization factor, and an emergency response strategy is generated; an emergency response strategy is used to identify a multi-device linkage trigger critical zone, a prediction correction feedback network is constructed, a global collaborative optimization instruction is generated, and the system operation efficiency and the control precision are improved.

A system and method in at least one embodiment provides magnetic levitation to a vehicle above and / or partially about a rail or track using a flux field generator having a plurality of members having mated waveform patterns. In a further embodiment, the magnetic levitation also uses a distribution system. In a further embodiment, the plurality of members forms a disk-pack turbine. In a further embodiment, the flux field generator is not vehicle based.

The invention discloses a magnetic suspension high-speed motor based on a centrifugal air cooling structure, and belongs to the technical field of magnetic suspension high-speed motors, the magnetic suspension high-speed motor comprises a main body assembly, the main body assembly comprises a front end cover, a motor shaft, two magnetic suspension bearings, a rotor, a stator core, a casing, a rear end cover, a protective cover, a protective net, a flow guide fan and an exhaust hole; the rotor is installed on the outer side wall of the motor shaft. When the motor shaft rotates, the flow guide fan is driven to rotate at a high speed, negative pressure is formed at the position of the exhaust hole, at the moment, external air flows into the heat dissipation flow channel through the air inlet flow channel, absorbs heat in the stator iron core, then flows into the machine shell, flows in the gap between the rotor and the stator iron core and is finally exhausted from the exhaust hole, and therefore heat dissipation is achieved. In the flowing process of the air, heat in the stator core and the rotor can be taken away, so that heat accumulation is avoided, and efficient heat dissipation of the stator and the rotor is realized.

The invention provides a magnetic suspension centrifugal water chilling unit, and belongs to the field of refrigeration equipment. The magnetic suspension centrifugal water chilling unit comprises a magnetic suspension compressor, a condenser and an evaporator, the magnetic suspension compressor is connected with the condenser through an exhaust pipeline, and the condenser is connected with the magnetic suspension compressor and the evaporator through a liquid supply pipeline assembly; the system further comprises a natural process control module, the natural process control module is used for dynamically adjusting the starting sequence of a plurality of magnetic suspension compressors in the water chilling unit by determining the energy efficiency health index of the water chilling unit and calculating the energy efficiency health index, and the natural process control module is electrically connected with the central controller. And a natural process control module is arranged, a multi-dimensional energy efficiency health index model is constructed, and the starting sequence of the compressors is dynamically adjusted by integrating the actual energy efficiency ratio, the evaporation efficiency, the compressor aging coefficient, the pressure fluctuation and the environment humidity correction term.

Provided in the present invention is an interference-factor-based high-safety and stable control method for an onboard magnetically suspended flywheel battery system. The method comprises: in the case of a safe operating condition interference, obtaining the difference between a displacement reference signal and an actual displacement signal, and inputting the difference into a Butterworth-filter-fused fuzzy active disturbance rejection control module, so as to obtain control currents, wherein the control currents comprise a radial control current, a torsion control current and an axial control current; the radial control current and the torsion control current are subjected to Clark inverse transformation, and the axial control current is subjected to power amplification, and the three currents are then compensated for, such that a three-phase control current of a radial coil, a three-phase control current of a torsion coil, and a control current of an axial coil are obtained; the control currents control the corresponding coils, and are also input into a multi-information extended Kalman filtering prediction module, such that the actual displacement signal is output; and in the case of a dangerous operating condition interference, cutting off an output signal from an operating condition recognition and safety determination module. The present invention can improve the stability, robustness and anti-interference capability of a system.

According to the implantable magnetic suspension blood pump, an impeller is suspended in a containing cavity of a pump shell and can rotate around the central axis of the pump shell, and a motor comprises a motor stator assembly arranged in the pump shell and a rotor magnet array arranged on the impeller; the magnetic suspension device comprises an electromagnet arranged in the pump shell and a suspension magnet assembly arranged on the impeller. Active electromagnetic suspension force provided by the electromagnet and passive permanent magnet bias suspension force provided by the suspension magnet assembly act together to enable the impeller to maintain a balanced suspension state in the axial direction and the radial direction. The motor and the magnetic suspension device are independently controlled to effectively reduce the negative influence of low signal detection accuracy caused by magnetic field coupling, and the hybrid magnetic suspension structure reduces the power consumption of the magnetic suspension device; the arrangement mode of the electromagnet and the motor stator assembly enables the whole structure to be compact, and the size and the weight of the blood pump are reduced; the suspension position of the permanent magnet is accurately controlled by accurately controlling the gap and the position relation between the electromagnet and the suspension magnet assembly.

The invention provides a magnetic suspension motor control method and device and a magnetic suspension motor, and relates to the technical field of magnetic suspension motor control, and the technical scheme is characterized in that the method comprises the steps: detecting the voltage change rate of a power grid, and judging a voltage fluctuation mode based on a preset threshold value; environment RFID tag information is read through a scene code analysis unit, and a current scene code is obtained; retrieving a maximum compensation current value, a current change rate threshold value and a PID integral time constant from a preset parameter matrix based on the voltage fluctuation mode and the scene code; and limiting the current change rate of the motor winding according to the current change rate threshold, and executing motor control through the maximum compensation current value and the PID integral time constant. The magnetic suspension motor control method and device and the magnetic suspension motor provided by the invention have the advantages of improving the operation stability of the motor in voltage fluctuation and multi-noise scenes, suppressing electromagnetic noise and adapting to different scenes.

The invention relates to the technical field of cold crucible smelting furnaces, in particular to a magnetic suspension smelting device of a multi-station water-cooling crucible, which comprises a furnace chamber, an induction coil and a crucible, the top of the furnace chamber is provided with a furnace cover, the side part of the furnace chamber is provided with a furnace door and a vacuum system for vacuumizing the interior of the furnace chamber, and the induction coil and the crucible are arranged in the furnace chamber. The plurality of crucibles are arranged on a crucible support together, a driving device is arranged at the bottom of the crucible support, and the driving device can drive the crucible support to ascend, descend and rotate, so that the crucibles can enter and exit from the center of the induction coil in sequence. After the interior of the furnace chamber is vacuumized, multiple smelting operations can be carried out in the atmosphere of argon filling after a single vacuumizing state, the operation steps are simple and convenient, the middle actions such as multiple vacuumizing and vacuum breaking are omitted, in addition, only one vacuumizing device and one motor driving device are adopted in the whole device, continuous and automatic smelting can be achieved, and the production efficiency is improved. The production efficiency is greatly improved; and the cost is saved.

The invention relates to the field of gravity measurement, and aims to provide a small-size high-precision gravimeter based on an anti-magnetic suspension principle. The gravimeter comprises a low-frequency magnetic potential well unit, a suspension mechanical oscillator unit, a displacement detection unit and a cavity enclosing unit, and lens groups of the low-frequency magnetic potential well unit, the suspension mechanical oscillator unit and the displacement detection unit are all located in a cavity of a heat preservation shell on the innermost side. According to the invention, a measurement environment without external influence can be provided for the displacement detection of the suspension oscillator, the adjustment of the frequency in the vertical direction in a magnetic suspension potential well is resisted, the movement of an object to be measured is reflected by the voltage fluctuation brought by the laser intensity change measured by the photoelectric converter, and the high-precision gravity measurement is realized; the vibrator adopts a magnetic suspension mode and does not make mechanical contact with the environment, and long-term irreversible deformation can be avoided; and a temperature control and magnetic shielding device or other auxiliary equipment with a large volume is not needed, so that the gravimeter is small in overall size, convenient to move, low in cost and beneficial to popularization.

An apparatus for transferring a substrate to a substrate processing chamber. The apparatus comprises: a substrate transfer chamber having a floor and a side wall; a substrate transfer module comprising a holder and second magnets, and configured to be movable in the substrate transfer chamber by magnetic levitation; and a controller configured to control an operating force for moving the substrate transfer module. The controller comprises: a parameter storage configured to store at least one model parameter; a control schedule creating section configured to acquire identification information and a movement schedule, to obtain the operating force, and to output a control schedule; and a magnetic force adjusting section configured to perform feedforward control.

The invention relates to a rotor identification method and device based on a magnetic suspension flexible assembly line, and the method comprises the steps: activating a pre-generated topological model; periodically scanning data of a slave station driver mover encoder, obtaining real-time position and speed data of a mover, and mapping the real-time position and speed data to corresponding coordinates; performing noise filtering and smoothing processing on the data; selecting a corresponding recognition algorithm according to the line body size, the bus communication frequency, the mover preset task sequence and the processed speed data; performing association analysis on the processed data to generate rotor track data; checking the trajectory data, and performing early warning if the trajectory data is abnormal; and the data passing the verification is updated to a database, a control instruction set is generated based on the topological model coordinates, the mover motion state and external instruction parameters, and the control instruction set is output to a path planning system, so that multi-mover high-precision real-time identification and dynamic adaptation control are realized, and support is provided for asynchronous scheduling.

The utility model provides a compensation device based on a magnetic suspension motor and an eddy current displacement sensor, which belongs to the technical field of magnetic suspension motor unbalanced signal extraction and suppression and comprises a differential eddy current displacement sensor, a nonlinear compensation circuit, a digital signal processor, an eddy current effect compensation circuit and an upper computer. The differential eddy current displacement sensor is used for acquiring displacement information and rotor temperature of a rotor of the magnetic suspension motor, and temperature compensation is carried out on the displacement information of the rotor by adopting a temperature compensation circuit built in the differential eddy current displacement sensor according to a temperature compensation control signal of the upper computer; and the upper computer is used for correspondingly obtaining a resistance value of a variable resistor Rt in the temperature compensation circuit according to the rotor temperature and the environment temperature when receiving the rotor temperature, and sending a temperature compensation control signal to the differential eddy current displacement sensor according to the resistance value of the variable resistor Rt. According to the invention, the accuracy of signal acquisition under complex conditions is ensured.

The invention relates to the technical field of magnetic suspension conveying, in particular to an AI-based intelligent multi-rotor magnetic suspension conveying system which comprises an assembly rail base, six linear guide rails, two annular guide rails and a rotor trolley. Damping rings are embedded in the side walls of the two annular guide rails and the six linear guide rails at equal intervals; two opposite L-shaped supports are fixedly installed on the two sides of the bottom of the mover trolley, and adjustable guide magnets are movably installed on the side walls of the L-shaped supports. Through the action of the damping ring and the adjustable guide magnet, transverse vibration of the rotor trolley in the moving process can be remarkably restrained, and then the stability and the operation efficiency of the system are improved; the magnetoresistive sensor receives a magnetic field signal sent by the magnetic field sensor, the magnetic field signal is converted into position information through a decoding algorithm of the AI controller, the position and state information of each mover trolley is accurately detected, collaborative operation of the multiple mover trolleys is achieved, and it is ensured that the mover trolleys efficiently and stably operate according to a preset path and sequence.

The magnetic suspension motor comprises annular rotors and a stator assembly, the two annular rotors are coaxial and arranged in the vertical direction, the number of magnetic poles of the two annular rotors is the same, the arrangement directions of the magnetic poles of the two annular rotors are the same or opposite, and the relative positions of the two annular rotors are fixed; the two annular rotors are arranged on the outer side of the stator assembly in a sleeving mode, and the stator assembly drives the two annular rotors to suspend and rotate through magnetic force. The axial driving assembly can provide additional axial force for the rotating cylinder, and after the rotating cylinder axially deviates, the rotating cylinder is driven to return to the normal position; the stator assembly is isolated from the outside by the mounting cavity, and the annular rotor is isolated from the outside by the rotating cylinder, so that external media are prevented from being polluted, and the stator assembly and the annular rotor are also prevented from being corroded by the external media.

The invention relates to the technical field of natural gas treatment, and particularly discloses a turbine and motor double-drive magnetic levitation natural gas expansion recompression unit, system and method, and the turbine and motor double-drive magnetic levitation natural gas expansion recompression unit comprises a natural gas expansion machine, a high-speed synchronous motor and a natural gas compressor which are coaxially and rigidly connected; the magnetic suspension supporting system comprises an expansion side magnetic suspension bearing arranged at the output end of the natural gas expansion machine and a compression side magnetic suspension bearing arranged at the input end of the compressor, and is used for realizing non-contact suspension and torque transmission of the rotor; the electric control unit comprises an electric appliance cabinet and a pressure sensor, a converter and a main controller are arranged in the electric appliance cabinet, the converter is connected with a power grid and the high-speed synchronous motor, and the main controller dynamically adjusts the operation mode and power of the high-speed synchronous motor by taking the outlet pressure of the natural gas compressor as a control variable. The natural gas compressor is driven by the natural gas expansion machine and the highly synchronous motor, the unit with the reverse power generation function is adopted, the operation flexibility of the unit is improved, and the comprehensive utilization rate of energy is remarkably increased.

The invention discloses intelligent detection equipment for internal defects of a titanium alloy cartridge receiver, and relates to the technical field of nondestructive testing, the intelligent detection equipment comprises a supporting base, a self-adaptive electromagnetic active vibration isolation assembly and a magnetic suspension pneumatic fine adjustment assembly, and by means of the synergistic effect of two core assemblies, namely the self-adaptive electromagnetic active vibration isolation assembly and the magnetic suspension pneumatic fine adjustment assembly, the internal defects of the titanium alloy cartridge receiver are detected. Ultra-stable vibration isolation and nanoscale precise positioning of the industrial CT three-coordinate measuring machine in the precise scanning process are achieved, and different from a traditional lag and friction scheme depending on passive air floating vibration isolation and mechanical transmission positioning, high-precision scanning operation is more stable and more precise, and the precision of the industrial CT three-coordinate measuring machine is improved. Firstly, a magnetic suspension friction-free support of the magnetic suspension pneumatic fine adjustment assembly is matched with a pneumatic nozzle matrix in a zero-contact and zero-abrasion mode, the bottleneck that a traditional lead screw guide rail mechanism is large in positioning error due to friction stick-slip and idle stroke is broken through, stable support is achieved through non-contact suspension, and accurate micro-power output is achieved through pneumatic counter-acting force; and the full-scale range from macroscopic positioning to nanoscale fine adjustment is ensured.

The invention relates to a magnetic suspension air separation expansion machine system and an operation method thereof. The system comprises a base, a magnetic suspension bearing assembly, a rotor assembly and a control module. The magnetic suspension bearing assembly is arranged on the base, comprises an expansion end radial magnetic suspension bearing, a brake end radial magnetic suspension bearing and an axial thrust magnetic suspension bearing, and is used for supporting radial and axial forces of the rotor assembly; the rotor assembly is arranged in the machine body and connected with the machine body through the magnetic suspension bearing assembly, and non-contact suspension is achieved. The control module is electrically connected with the magnetic suspension bearing assembly and used for controlling the magnetic suspension bearing assembly to suspend the rotor. The operation method comprises the steps of self-checking before starting, electrifying to suspend the rotor, starting the air compressor to pressurize, adjusting flow to drive the expansion impeller, carrying out split-flow cooling on gas, and collecting data in real time to maintain stable suspension of the rotor. The device has the advantages of high efficiency, stability, energy conservation and the like and is suitable for the field of air separation.

According to the implantable magnetic suspension blood pump structure, an impeller is suspended in a containing cavity of a pump shell and can rotate around the central axis of the pump shell, and blood is sucked in from an inlet and discharged from an outlet; the motor comprises a motor stator assembly arranged in the pump shell and a rotor magnet array arranged on the impeller. The magnetic suspension device comprises an electromagnet arranged in the pump shell and a suspension magnet assembly arranged on the impeller, and electromagnetic suspension force provided by the electromagnet and passive permanent magnet bias suspension force provided by the suspension magnet assembly jointly maintain suspension balance of the impeller. The motor and the magnetic suspension device are independently controlled, so that the negative influence of low signal detection accuracy caused by magnetic field coupling is effectively reduced; the hybrid magnetic suspension structure reduces power consumption of the magnetic suspension device; the arrangement positions of the motor stator assembly and the electromagnet enable the blood pump to be compact in structure and reduce the size and weight; the gap and the position of the electromagnet and the suspension magnet assembly are accurately controlled, accurate control over the suspension position of the permanent magnet is achieved, and the pumping efficiency and stability of the blood pump are improved.

The embodiment of the invention provides a compression and expansion all-in-one machine. The compression and expansion all-in-one machine comprises an expansion side shell, a guide vane, an expansion wheel, a shaft, a compression side shell, a diffuser, a compression wheel, an expansion side shaft end seal, a compression side shaft end seal, a motor section shell, a motor stator, a temperature control plate and a magnetic suspension bearing. According to the embodiment of the invention, the expansion machine, the compressor and the motor are integrated, the magnetic suspension bearing is adopted for supporting, and the temperature control component is designed to realize partition balance of the temperature in the main machine, so that the main machine is suitable for low-temperature zero-pollution operation conditions; the low-temperature condition of the expansion side is fully utilized, the shaft end seal and the temperature control plate of the expansion side are designed, and the motor is cooled in a mode of combining low-temperature air cooling and low-temperature cold conduction; by adding an auxiliary cooling mode, the variable working condition adaptive capacity of the whole machine in the aspect of motor cooling can be improved.

The invention discloses an automatic control system based on full-automatic intelligent surface treatment equipment, which relates to the field of industrial production surface treatment and comprises a data acquisition module, a data analysis module, a process decision module, a control execution module, a fault monitoring module, a man-machine interaction module, a data storage and management module, a self-adaptive learning module, a remote monitoring and maintenance module and a green energy-saving module. An advanced sensor is combined with a micro-nano sensing technology, a deep reinforcement learning and transfer learning combined algorithm is applied, genetic optimization fuzzy reasoning is adopted, through magnetic suspension and compound control, faults are monitored based on deep learning, a VR technology is introduced to realize human-computer interaction, and a block chain technology is adopted to store data. And a meta-reinforcement learning algorithm is used to automatically adjust decision rules and parameters, and the remote collaborative robot carries out maintenance operation on the equipment. The system is accurate in data acquisition, scientific in analysis and decision, accurate in control, timely in fault diagnosis, convenient in man-machine interaction, efficient in data management, energy-saving and capable of comprehensively improving the production efficiency.

The invention provides a maglev traffic track structure and a construction method thereof. The maglev traffic track structure comprises a bridge deck, a maglev track assembly and an induction plate assembly. The magnetic levitation rail assembly comprises a magnetic levitation rail, a hexagon nut, a gasket, a thin nut and a screw. The induction plate assembly comprises an iron core, an aluminum plate, shear nails and screws. The iron core is vertically welded and fixedly connected with the shear nails, the shear nails and the bridge deck are cast and anchored into a whole, the iron core is arranged on the upper end face of the bridge deck, and the aluminum plate is installed on the upper end face of the iron core through screws; the construction method comprises the steps that the prefabricated bridge deck slab is modularly poured in a factory, the magnetic levitation rail is installed, adjusted and locked in the factory, the levelness and straightness of the magnetic levitation rail are measured again, and the bridge deck slab is installed on a construction site. According to the invention, high-precision, high-efficiency and low-cost installation of the maglev traffic track is realized.

The invention belongs to the technical field of welding seam detection, and particularly relates to a welding seam detection device for a magnetic levitation traffic low-vacuum pipeline, which is characterized in that a helium mass spectrum leakage detection structure is arranged on the outer side of the vacuum pipeline, a helium inflation structure is arranged on the inner side of the vacuum pipeline, and a rolling structure is arranged at the bottom end of the vacuum pipeline and comprises a third base; supports are symmetrically fixed to the two sides of the top face of the third base, V-shaped frames are hinged to each support in a bilateral symmetry mode, rollers are connected between the ends of the two V-shaped frames, the two ends of a rotating shaft of each roller penetrate through the two V-shaped frames respectively and are rotationally connected with the contact positions of the two V-shaped frames, one end of each roller penetrates through the corresponding V-shaped frame and is fixedly provided with a first gear, and protective covers are fixed to the end faces of the V-shaped frames; a gear motor is fixedly installed on the outer end face of the protective cover, an output shaft of the gear motor penetrates through the protective cover to fix a second gear, the second gear is meshed with the first gear, and the two rolling structures are arranged in a mirror symmetry mode. The device does not need to lay a leak detection tool around a welding seam, facilitates leak detection, improves leak detection efficiency, and improves leak detection accuracy.

The invention discloses a flywheel energy storage control method, system and device and a storage medium, and is applied to the technical field of magnetic suspension flywheels, and the method comprises the steps: when a flywheel is in a static state and the charging work of the flywheel is started, controlling a machine side converter according to a principle that the rotation acceleration of the flywheel remains unchanged, the rotating speed of the flywheel is increased from zero to the minimum working speed nmin; when the rotating speed of the flywheel is within the range from nmin to the switching speed ns, the machine-side converter is controlled according to the principle that the output current of the machine-side converter is kept unchanged so as to charge or discharge the flywheel; and when the rotating speed of the flywheel is within the range from the switching speed ns to the maximum speed nmax, controlling the machine-side converter according to the principle that the output power of the machine-side converter is kept unchanged so as to charge or discharge the flywheel. By applying the scheme of the invention, the control of flywheel energy storage can be effectively realized, the charging and discharging efficiency is ensured, and the stability during charging and discharging and the power supply quality are ensured.

The invention discloses a guide constraint control method for a maglev high-speed rail under network attacks, and belongs to the field of rail transit. The method adopts a dynamic air gap constraint and boundary layer sectional type continuous adjustment technology to perform anti-network attack control on the maglev high-speed rail guide system: establishing a dynamic mathematical model and a lateral centrifugal force model of the maglev high-speed rail guide system, and further obtaining a state-space equation and a centrifugal force suppression control rate of the maglev high-speed rail guide system; constructing a satellite navigation network attack model of the maglev high-speed rail track and driving information; converting a state-space equation of the magnetic levitation high-speed rail guiding system into a control equation of the magnetic levitation high-speed rail guiding system containing wind shear disturbance and guiding force mismatch matching interference; dynamic constraint control is adopted, a guiding controller is designed, and guiding constraint control over the magnetic levitation high-speed rail under network attacks is achieved. While the starting stability of the maglev high-speed rail is improved, mismatch of the guiding force is rapidly compensated, and stable operation of the maglev high-speed rail is guaranteed.

To provide a control device for a magnetic bearing that enables mode separation of a natural vibration mode with high precision and can design a stable controller with the degree of the controller made small.SOLUTION: With respect to a model for a rotary body controlled by radial magnetic bearings 1, 2, a status space model is structured by excluding a controller which controls a plant from a mode composition model having parameters of a mass matrix, a rigidity matrix, and an attenuation matrix identified and adjusted by a parameter estimation part, and a mode separation part 61 on the input side of controllers 1, 2 inputs a measurement signal of a displacement sensor from the radial magnetic bearings 1, 2 to perform mode separation with a mode separation coefficient. A mode composition part 62 on the output side of the controllers 1, 2 performs mode composition with a mode composition coefficient, and outputs a drive command signal (current, voltage) to electric magnets of the radial magnetic bearings 1, 2.SELECTED DRAWING: Figure 14

The invention discloses an energy-saving type magnetic suspension centrifugal water chilling unit, and relates to the technical field of refrigeration, the energy-saving type magnetic suspension centrifugal water chilling unit comprises a magnetic suspension compressor, a variable-diameter throttling mechanism and a heat exchange system, the heat exchange system is fixedly installed on the side face of the outer wall of the magnetic suspension compressor, and the variable-diameter throttling mechanism is fixedly installed on the side face of the outer wall of the heat exchange system; an outlet of the magnetic suspension compressor is directly connected with the heat exchange system through a pipeline, and the reducing throttling mechanism is connected with the heat exchange system through a pipeline. The front-stage closed impeller and the rear-stage semi-open impeller are coaxially connected in series, efficient compression without mechanical contact and oil lubrication is achieved, the problems that a centrifugal compressor is high in energy consumption and large in vibration due to mechanical friction are solved, and the energy efficiency ratio of a unit is effectively increased.

The invention discloses a torque system and suspension system decoupling method of a single-winding magnetic suspension permanent magnet synchronous motor, the motor adopts a suspension parallel single-winding structure, the torque system decouples suspension current, permanent magnets adopt consequent poles, and the suspension system decouples a rotor position angle; aiming at a current loop of the suspension system, regarding a coupling item of a torque system to the suspension system as disturbance, designing a sliding mode disturbance observer based on an improved superhelix algorithm, observing and compensating the disturbance, and realizing decoupling of the suspension system and torque control; aiming at the displacement / suspension force ring of the suspension system, designing a sliding-mode active-disturbance-rejection controller, observing the disturbance of the rotor displacement and compensating the suspension force to realize decoupling among different suspension degrees of freedom; the residual coupling factors of the torque system are regarded as system disturbance, and the disturbance is observed and compensated in real time by using a sliding mode-active disturbance rejection composite control method, so that decoupling of the residual coupling factors is realized. According to the invention, comprehensive decoupling of the torque system and the suspension system is realized.

The invention discloses a magnetic suspension high-speed motor with an air cooling structure, and relates to the technical field of magnetic suspension high-speed motors, the magnetic suspension high-speed motor comprises a heat dissipation assembly, and the heat dissipation assembly comprises a casing, a rotor core, two end covers, two magnetic suspension bearings, two heat dissipation seats, heat dissipation grooves, guide vanes and exhaust holes. When heat dissipation operation is carried out, negative pressure is generated outside the exhaust holes, at the moment, external air flows into the air inlet grooves and then is discharged out of the machine shell from the exhaust holes after half circulation in the machine shell, and heat dissipation of the motor shaft, the rotor iron core, the stator iron core and the stator winding is achieved in the air flowing process. According to the invention, the air flow channels are arranged in the motor shaft and the rotor core, so that external air can enter the motor from the two sides of the motor and then is discharged from the two sides of the motor, no large pressure drop is generated in the process, heat dissipation is more sufficient, and the heat dissipation effect is better.

The invention provides an embedded magnetic-gas hybrid bearing, and belongs to the field of bearings. The problems that an existing embedded magnetic-gas hybrid bearing is complex in machining process, and an air bearing part is poor in reusability and difficult to repair are solved. Comprising an inner supporting structure and an outer supporting structure which are embedded into the two sides of the magnetic-gas hybrid bearing seat, an outer supporting tooth-shaped table of the outer supporting structure is inserted between stator magnetic poles of the magnetic suspension bearing and spliced with an inner supporting tooth-shaped table of the inner supporting structure to form a complete cylindrical surface, and a corrugated foil wraps a top foil and is arranged in the spliced cylindrical surface. The shaft neck can be prevented from being in direct contact with the magnetic pole, and the working rotating speed range and the adaptive load of the magnetic suspension bearing and the air bearing are expanded; a protective bearing of the magnetic suspension bearing is replaced by the air bearing, so that the axial length of the rotor is reduced, and the shafting stability is improved; and installation and maintenance are convenient.