91 results about "Magnetic suspension system" patented technology

The invention relates to the technical field of adsorption instruments, particularly provides a gravimetric adsorption instrument based on a magnetic suspension balance and a control method of the gravimetric adsorption instrument, and aims to solve the problem that a microbalance of an existing gravimetric adsorption instrument has many restrictions on the application range of the adsorption instrument. The gravimetric method adsorption instrument comprises a magnetic suspension system and a sample chamber, the magnetic suspension system comprises a first part and a second part which are arranged outside and inside the sample chamber, the first part comprises a microbalance and a first magnetic device, and the first magnetic device is an electromagnetic device and is connected with the microbalance of the magnetic suspension system; the second part comprises a second magnetic device, the second magnetic device is a permanent magnet and is connected with a sample in the sample chamber, and magnetic force generated after the first magnetic device is electrified can attract the second magnetic device and the sample and weigh the second magnetic device and the sample through the microbalance. The first part of the magnetic suspension system is arranged outside the sample chamber, so that the first part is prevented from being in contact with the atmosphere in the sample chamber, and the existing problems are solved.

The invention relates to an air suspension high-speed centrifugal compressor applied to the technical field of centrifugal machines, and the air suspension high-speed centrifugal compressor comprises a machine body, a centrifugal rotor, a pneumatic bearing, a magnetic suspension system, an end magnetic disk, a shaft magnet, a brake magnet, a magnetic core, an arc rail groove, a brake module and a steering rib. Vector electromagnetic phase modulation is adopted by the electromagnet, active damping control and gyroscopic effect compensation of the centrifugal rotor are achieved through magnetic field vector synthesis, the centrifugal rotor is accelerated and decelerated through magnetic force, the critical rotation speed acceleration time and deceleration time of the centrifugal rotor are effectively shortened, and the hybrid magnetic locking technology is adopted in the shutdown stage of the centrifugal machine. When the centrifugal rotor is static, the brake module is triggered, magnetic pole reversal of the brake magnet is achieved through a reconstruction mechanism generated by the brake magnet, and the centrifugal rotor is in a stable magnetic attraction brake state through the cooperative magnetic attraction effect of the permanent magnet and the brake magnet.

The invention discloses an anti-magnetic suspension accelerometer device based on a quasi-zero stiffness structure and a measurement method, and belongs to the field of precise instruments and meters. The device comprises a support, an axial displacement platform, magnetic conductive soft iron, an upper-layer pyrolytic graphite sheet, a lower-layer thin bismuth wafer, a capacitance displacement sensor and a permanent magnet array, wherein an anti-magnetic suspension system, a magnetic rigidity regulation and control system and a displacement detection system are arranged in the support; the anti-magnetic suspension system is composed of an upper-layer pyrolytic graphite sheet, a lower-layer thin bismuth wafer and a permanent magnet array, the magnetization directions of an inner ring and an outer ring of the permanent magnet array are opposite, a suspension element is suspended by virtue of anti-magnetic force and gravity balance, and quasi-zero stiffness is realized through positive and negative stiffness offset; according to the regulation and control mode, the magnetic field of the air gap where the suspension element is located is adjusted by adjusting the distance between the magnetic conductive soft iron and the permanent magnet, and the magnitude and gradient of magnetic induction intensity in all directions are changed, so that the magnetic rigidity is regulated and controlled, and efficient and accurate regulation and control of the sensitivity and the measuring range of the anti-magnetic suspension accelerometer are achieved. Therefore, the application range of the anti-magnetic suspension accelerometer is expanded.

The invention discloses an active magnetic suspension bearing lumped disturbance suppression method based on a self-adaptive finite time extended state observer. Establishing a mathematical model of the radial active magnetic suspension bearing containing lumped disturbance; constructing a self-adaptive nonsingular terminal sliding mode decoupling control algorithm according to the mathematical model of the radial active magnetic suspension bearing containing lumped disturbance; and analyzing reasons for system tracking errors caused by lumped disturbance, designing a self-adaptive finite time extended state observer, and carrying out decoupling of four radial degrees of freedom of the active magnetic suspension bearing and carrying out feed-forward compensation. According to the invention, the self-adaptive finite time extended state observer is adopted to accurately estimate the feedforward lumped disturbance, so that stable ultrahigh-speed operation of the magnetic suspension system is ensured; the finite time convergence theory in the sliding mode algorithm is introduced, it can be guaranteed that the system is rapidly converged and stably operates at an ideal working point, accurate estimation of various linear and nonlinear disturbances can be achieved, and the calculation amount is reduced for system model order reduction and decoupling processing.

The invention discloses a magnetic suspension control method based on a BP neural network, and the method achieves the self-tuning of control parameters through the real-time learning of the neural network and the adaptation of the dynamic characteristics of a magnetic suspension motor, and specifically, a system can achieve the self-tuning of the control parameters according to the actual operation data of the magnetic suspension motor in different operation states and stages. According to the optimization method, parameters of neurons of the input layer and the hidden layer are dynamically adjusted, control parameters of the output layer are corrected in real time, the suspension stability of the magnetic suspension motor rotor is remarkably improved through the optimization method, compared with a traditional method, the time that controller parameters depend on manual debugging is effectively shortened, the labor cost and the operation complexity are greatly reduced, and the operation efficiency is improved. Meanwhile, control parameters are optimized in real time through the BP neural network, more excellent controller parameters can be output, the debugging effect is more stable, and the response speed and the control precision of the magnetic suspension system are remarkably improved.

The invention discloses an electromagnetic suspension system operation state monitoring method and device, equipment and a medium, and relates to the technical field of traffic and artificial intelligence crossing, and the method comprises the steps: constructing an attribute configuration table containing the corresponding relation between a train operation state and a state attribute based on the engineering knowledge and empirical data of a maglev train; determining a preset feature extractor based on the attention mechanism and a wavelet function, performing feature extraction on the test sample in combination with a sliding window function, and performing multi-scale analysis on feature fragments based on a wavelet transform technology; training the initial attribute learner based on a generalized zero sample learning method and an attribute configuration table, and judging a test sample based on a gating model constructed in the training process; and performing attribute prediction on the feature vector by using a target attribute learner, determining a monitoring result based on a judgment result, an attribute value and a nearest neighbor search rule, and taking early warning and maintenance measures. The accuracy of monitoring the operation state of the electromagnetic suspension system is improved.

The invention discloses a compensation parameter self-tuning vibration suppression method for a magnetic suspension bearing system, which belongs to the field of magnetic suspension bearing control, and comprises the following steps: S1, carrying out a pulse excitation experiment on a magnetic suspension bearing-rotor system by using an electromagnetic vibration exciter, a magnetic suspension bearing-rotor system model is obtained through parameter identification of the frequency response function; s2, obtaining a phase compensation angle according to the mapping relation of the frequency response function; and S3, according to the system model, designing a compensation controller based on a second-order generalized integral-synchronous rotating coordinate system, and through the system model, the phase compensation angle and stability criterion self-tuning compensation control parameters, realizing vibration suppression of the magnetic suspension system. The method can effectively suppress unbalanced mass vibration of the rotor, compensation parameters do not need to be tested and calibrated in advance, the self-tuning process is rapid and convenient, and the method is suitable for any multi-degree-of-freedom magnetic suspension bearing-rotor system and has good practical value and economic value.

The utility model discloses a Stirling heat engine teaching aid based on an auxiliary magnetic suspension system and a U-shaped liquid column, which comprises a support table, a glass U-shaped tube and a quartz tube, a high-frequency induction heater is arranged on the upper side of the support table, a heating induction coil of the high-frequency induction heater is sleeved on the quartz tube, the quartz tube is horizontally arranged, and the glass U-shaped tube is arranged on the quartz tube. A first sealing plug and a second sealing plug are respectively plugged at the two ends of the quartz tube, heat preservation steel wool is arranged at one section, close to the first sealing plug, of the interior of the quartz tube, and a heating iron ring is arranged in the center of the interior of the quartz tube and is positioned in a heating induction coil of the high-frequency induction heater. According to the utility model, through the design of the auxiliary magnetic suspension system and the U-shaped liquid column, the friction between the piston and the pipe wall is greatly reduced, the energy loss in the mechanical energy conversion process is effectively reduced, and the working principle of the Stirling heat engine and the application of the second law of thermodynamics can be intuitively displayed.

The application provides a UAV-InSAR-based magnetic suspension system multi-point collaborative reinforcement learning compensation control method, system, device and medium, the method comprises the following steps: using a UAV to carry a lightweight X-band interferometric synthetic aperture radar system to carry out high-precision surveying and mapping on a magnetic suspension line, and constructing an orbit irregularity power spectrum model; a hierarchical control system is constructed, the amplitude saturation controller in the lower layer generates a basic electromagnetic force control law according to the state quantity of the current suspension point; the upper layer compensation controller based on reinforcement learning is an agent, interacts with the environment composed of the suspension frame, the track and the amplitude saturation controller, trains by using the standardized irregularity function obtained from the track irregularity power spectrum model, and outputs the compensation control quantity for each suspension point; the basic electromagnetic force control law and the compensation control quantity are superimposed to generate the total electromagnetic force control law of each suspension point, and the suspension system is actively compensated and globally stably suspended. The application significantly improves the comprehensive control performance of the suspension system.

The invention discloses a control method and device of a magnetic suspension rotor, a magnetic suspension system, a storage medium and a computer program product. A position detection assembly used for detecting the radial position of the rotor and a temperature collection assembly used for collecting the surface temperature of the rotor are arranged. The method comprises the steps that in the rotor operation process, current radial position data, collected by a position detection assembly in real time, of a rotor and current temperature data, collected by a temperature collection assembly in real time, of the rotor are obtained; calculating the real-time position deviation of the rotor according to the current radial position data; judging whether the rotor has radial expansion or not according to the real-time position deviation; if it is determined that radial expansion exists in the rotor, the thermal expansion coefficient of the rotor is calculated according to the current temperature data and the real-time position deviation; and generating a control signal based on the real-time position deviation and the thermal expansion coefficient, and adjusting the radial stress state of the rotor according to the control signal so as to correct the suspension position of the rotor. According to the scheme, rapid dynamic compensation of the rotor is realized.

The invention discloses a dead-zone-free bridge circuit which comprises a power supply positive electrode, a power supply negative electrode and at least one bridge arm circuit, the bridge arm circuit comprises a first switching device, a second switching device and at least one direct connection prevention inductor, and the first end of the first switching device is electrically connected with the power supply positive electrode; the at least one direct connection prevention inductor is connected in series between the second end of the first switching device and the first end of the second switching device, the second end of the second switching device is electrically connected with the negative electrode of the power supply, and the third end of the first switching device and the third end of the second switching device are control ends; the output end of the bridge arm circuit is electrically connected between the at least one shoot-through prevention inductor and the first end of the second switching device or between the at least one shoot-through prevention inductor and the second end of the first switching device or between the at least one shoot-through prevention inductor. According to the bridge circuit, dead time does not need to be set, the direct connection protection effect of the bridge arm switching device can be achieved, and the output of the bridge circuit is hardly influenced.

The application belongs to the technical field of garage door, and particularly relates to a magnetic suspension system for a high-speed low-noise garage door, which comprises a stand, a door curtain piece, a rotary motor-synchronous belt transmission mechanism, a modular magnetic suspension mechanism and a supporting wheel assembly; the inside of the stand is provided with a cross-shaped sliding groove; the magnetic suspension mechanism is composed of a door frame permanent magnet and a pair of first and second door curtain piece permanent magnets; a stable non-contact suspension gap is formed through reverse parallel closed magnetic circuit and bidirectional same-pole repulsion; the supporting wheel assembly is matched with the inner wall of the sliding groove to realize radial limiting and offset buffering; the application aims to solve the technical defects of the conventional lifting garage door, such as high noise, easy wear, running jam and offset caused by mechanical friction between the door curtain and the track, and the fact that the existing magnetic suspension door body cannot be compatible with the original rotary motor-synchronous belt transmission system, is difficult to be modularly added and stably suspended and guided.

The invention relates to the technical field of magnetic suspension motors, and discloses an ultralow-temperature magnetic suspension motor stator heat dissipation structure which comprises a magnetic suspension motor, the magnetic suspension motor comprises a motor base, the efficiency of phase change heat absorption is far higher than that of single-phase convection, a large amount of heat can be rapidly taken away, meanwhile, a cavity is distributed in a stator, and a heat conduction plate is combined. The heat conducting plate is made of an electric insulation composite material, so that heat generated by the winding is better conducted, close-fitting and three-dimensional cooling of the winding and the stator is realized, local hot spots are greatly eliminated, and a temperature field of the stator is very uniform; a cooling working medium is completely sealed in an independent cavity and a pipeline, the risk that the cooling working medium leaks into a motor air gap, a magnetic bearing or a winding is completely eradicated, a magnetic suspension system with extremely high requirements for cleanliness and stability is perfectly matched, a heat dissipation structure is integrated in the stator iron core, no extra space is occupied, and the compactness of the motor is kept.

There is provided a magnetic levitation system comprising: a base structure; a carrier movable relative to the base structure in a transport direction; and at least one active magnetic bearing configured to generate a magnetic retention force acting in a retention direction for retaining the carrier at the base structure. The carrier and / or the base structure includes a plurality of damping units, a first damping unit of the plurality of damping units being tuned to a first frequency or a first frequency range, and a second damping unit of the plurality of damping units being tuned to a second frequency or a second frequency range.

The invention discloses a motor control method and device, a motor, a magnetic suspension system, a storage medium and a computer program product, and the method comprises the steps: determining the current value of the back electromotive force of the motor according to the current value of the stator current of the motor; determining the current value of the rotor temperature of the motor and the current value of the rotor deformation quantity of the motor according to the current value of the rotor material parameter of the motor and the current value of the back electromotive force of the motor based on the corresponding relation of the set rotor material parameter, the set back electromotive force, the set rotor temperature and the set rotor deformation quantity; and controlling the motor according to the current value of the rotor temperature of the motor and the current value of the rotor deformation quantity of the motor. According to the scheme, non-contact detection of the temperature and the thermal deformation quantity of the motor rotor is realized based on the back electromotive force of the motor, so that the position and temperature control of the motor rotor is realized, the thermal deformation quantity of the motor rotor caused by temperature rise is in a controllable range, and the motor efficiency is improved.

A control system for controlling a magnetic suspension system includes sensors configured to produce position signals indicative of a position of an object to be magnetically levitated, and a controller configured to control, in accordance with the position signals, electric currents supplied to magnetic actuators of the magnetic suspension system to magnetically levitate the object. The control system includes a computing system configured to maintain and update a computational model of the magnetic suspension system based on identification runs where identification run signals are supplied to the magnetic actuators of the magnetic suspension system and responses to the identification run signals are detected from the sensors and / or the magnetic actuators. The computing system is configured to compare quantities related to the computational model to quantities related to the magnetic suspension system to reveal deviations from the expected operational conditions of the magnetic suspension system.

The utility model discloses a hybrid magnetic suspension magnetic drive type annular conveying device, which relates to the technical field of magnetic suspension and comprises a stator part and a rotor part, the stator part mainly provides a magnetic field, and the rotor part moves in the magnetic field in a suspension manner; the stator part is of an annular structure and can be divided into an arc-shaped structure and a linear structure according to the shape, the stator part is provided with a linear guide rail and an arc-shaped guide rail, a coil is wound between the arc-shaped guide rails, the rotor part comprises two U-shaped connecting pieces, a pulley mechanism, a magnetic railing ruler holder and a permanent magnet frame, permanent magnets adopting a Halbach array are arranged in the permanent magnet frame, and the permanent magnets are connected with the U-shaped connecting pieces. The magnetic railing ruler holder is provided with suspension coils, a permanent magnet is arranged between each group of suspension coils, and permanent magnets and guide coils are arranged in upper, lower, left and right grooves of the suspension connecting plate. A magnetic force driving system and a magnetic suspension system are effectively combined, the advantages of being free of friction in transmission, free of lubrication, clean, free of pollution and the like are achieved, the application prospect is wide, and far-reaching significance is achieved for development of high and new technology industries.

The utility model discloses a magnetic suspension tracked vehicle driven by a linear motor. The technical problems that an existing tracked vehicle is large in weight, large in energy consumption and poor in operation stability are solved. The vehicle comprises a vehicle body, a frame; a linear electric drive system; a magnetic suspension system; the crawler drives the vehicle body to move; the linear electric driving system comprises a plurality of primary windings arranged on the lower side of the vehicle body and a plurality of secondary magnetic sheets arranged on the crawler belt, and the primary windings and the secondary magnetic sheets interact to push the crawler belt to move; the magnetic suspension system comprises at least one electromagnetic track arranged on the vehicle body and a magnetic track arranged on the inner side of the vehicle frame, and the electromagnetic track and the magnetic track interact to suspend the vehicle body; and a wheel body is arranged on the frame and is in rolling connection with the crawler belt. The utility model has the advantages of compact layout, stable track operation, low energy consumption and the like.

The application discloses a full magnetic suspension system based on bidirectional active axial force of a rotor and a control method thereof. The full magnetic suspension system is provided with an axial force winding 3, and a magnetic field rotating synchronously with the rotor generated on the winding can generate stable axial forces in two directions of attraction and repulsion to compensate for axial hydraulic force. The size and direction of the active axial force generated on the rotor can be actively controlled through the current on the axial force winding 3. The active Maxwell force and the Lorentz force in the axial direction are active suspension forces, and together with passive magnetic resistance force, form a composite axial suspension force. The application can effectively improve the axial stiffness by increasing the active axial force. The control method provided by the application can make the axial force of the rotor have good dynamic response speed, and has better anti-interference ability compared with passive suspension. The active axial electromagnetic suspension system greatly improves the stability performance of the magnetic suspension pump in the axial direction.

The application discloses a high-throughput automatic multi-spectroscopy integrated experiment method, system and medium, and belongs to the technical field of automatic experiment and spectroscopy analysis. The method comprises the following steps: material warehouse-out and analysis driven by a general control system module, automatic preparation by a pretreatment device, transmission through a ground rail and a magnetic suspension system, automatic multi-spectroscopy parallel test, automatic recovery by a post-treatment device, and material warehouse-in and data closed loop. The experiment system integrates an automatic storage device, a multi-spectroscopy test workstation and a machine scientist interactive module, realizes full-process unmanned operation and data traceability, solves the problems of low efficiency, discrete process and incapability of cooperation with an AI system of existing spectroscopy experiments, significantly improves spectroscopy characterization efficiency, supports AI-driven intelligent research and development, and is suitable for material science, catalytic screening and chemical analysis scenes.

The invention discloses a constant-air-gap zero-power unbalance-load-resistant dual-active hybrid magnetic levitation system and a control method, and relates to the technical field of magnetic levitation, the constant-air-gap zero-power unbalance-load-resistant dual-active hybrid magnetic levitation system comprises a variable-bias hybrid magnetic levitation unit, the variable-bias hybrid magnetic levitation unit comprises a worm and gear reduction gearbox, and one end of the worm and gear reduction gearbox is connected with a servo motor; two F-shaped iron cores are arranged on one side of the servo motor, an opening is formed in the connecting position of the two F-shaped iron cores, a disc-shaped radial magnetized permanent magnet is arranged in the opening, and a first electromagnetic coil and a second electromagnetic coil which are used for active control are arranged below the disc-shaped radial magnetized permanent magnet and the F-shaped iron cores. According to the constant-air-gap zero-power unbalance-load-resistant dual-active hybrid magnetic suspension system and the control method, the rotating angle of the permanent magnet and the current of the electromagnetic coil are actively and cooperatively adjusted according to the state of the system to change the effective magnetic flux at the working air gap, so that the magnetic force is adjusted to maintain stable suspension; coordinated optimization of constant air gap and low power consumption characteristics of the hybrid suspension system is realized.

The invention provides a permanent magnet and electromagnetic hybrid hanging type suspension pipe rail transportation system. The permanent magnet and electromagnetic hybrid hanging type suspension pipe rail transportation system comprises a pipeline, a magnetic levitation vehicle, a traction module and a suspension module. The magnetic levitation vehicle is provided with the levitation module based on the permanent magnet and electromagnetic hybrid levitation technology, and the levitation module is arranged between the magnetic levitation vehicle and the inner top of the pipeline, so that the innovative design of combining permanent magnet and electromagnetic hybrid levitation and suspension type layout is realized; according to the innovative design, a permanent magnet part in the permanent magnet and electromagnetic hybrid electromagnet can be used for providing basic suspension force so as to greatly reduce energy consumption required by suspension, and a complex walking supporting mechanism in a traditional magnetic suspension system can be omitted through a hanging type structure, so that the section size of a pipeline is remarkably reduced; therefore, the technical problems of high energy consumption, complex structure and high construction cost of the existing magnetic suspension type pipe rail transportation system are synchronously solved, and the magnetic suspension type pipe rail transportation system with low energy consumption and high space utilization rate is realized.

The invention relates to the technical field of magnetic suspension equipment power supply protection, in particular to a magnetic suspension equipment uninterruptible protection power supply system, which comprises a power supply module with an input end connected with an alternating current mains supply end; the input end of the first AC / DC module is connected with the output end of the power supply module, the output end of the first AC / DC module is connected with the magnetic suspension system, and the first AC / DC module is used for converting alternating current into direct current to supply power to the magnetic suspension system; the input end of the charging and discharging assembly is connected with the output end of the power supply module or the output end of the first AC / DC module, the output end of the charging and discharging assembly is connected with the magnetic suspension system, and the charging and discharging assembly is used for charging by using the direct current supplied by the power supply module and providing the direct current to the magnetic suspension system after the alternating current mains supply loses power. According to the invention, under the condition that the external mains supply suddenly loses power, the charging and discharging assembly can still supply power to the magnetic suspension system, and the process that the direct current of the battery pack is inverted and then rectified in a UPS + AC / DC scheme is omitted, so that the power generation efficiency is improved, the battery capacity can be reduced, the conversion rate is improved, and the system cost is reduced.

The present application provides an active three-degree-of-freedom magnetic bearing and its control method, motor and compressor. The active three-degree-of-freedom magnetic bearing includes a bearing rotor, including a rotor ring body on which a rotating shaft is mounted; a bearing stator, including a first bearing stator assembly and a second bearing stator assembly; the first bearing stator assembly applies a radial magnetic field to the rotor ring body to adjust the radial position of the rotor ring body; the second bearing stator assembly applies an axial magnetic field to the rotor ring body to adjust the axial position of the rotor ring body. The present application sets corresponding bearing stators in the radial and axial directions of the bearing rotor, with a high degree of integration, so that there is no need to assemble a thrust plate separately on the rotating shaft, the structure is more compact, the process is simplified, the bearing volume is effectively reduced, the rotating shaft length is shortened, the critical speed of the rotor is increased, and the operating stability of the magnetic suspension system is improved.

The present invention discloses a hybrid-driven high-temperature superconducting magnetic levitation tracked vehicle and a driving method thereof, and belongs to the technical field of tracked vehicles. The present invention solves the problem of a single driving form of a tracked vehicle. The present invention comprises a vehicle body, a track is arranged on the vehicle body, a magnetic levitation system and a track propulsion system are arranged between the vehicle body and the track, and a tension propulsion system is also arranged on the vehicle body; the magnetic levitation system is used to suspend the vehicle body on the track, the magnetic levitation system comprises a first permanent magnet group, and a suspension magnet is arranged on the vehicle body; the track propulsion system is used to propel the track to move when the vehicle body is suspended on the track; the tension propulsion system comprises a guiding superconducting component and a driving superconducting component, the guiding superconducting component cooperates with the first permanent magnet group to support the curved part of the track, and the driving superconducting component cooperates with the first permanent magnet group to push the track to move under the vehicle body. The present invention uses high-temperature superconducting suspension force drive as one of the power sources, and the power output is more stable and reliable, and the power system redundancy is increased.

The invention relates to a coil current control device and method and a magnetic suspension system. The device comprises a current adjusting circuit which is used for adjusting the magnitude and the direction of current flowing through a coil to be controlled. And a sampling module. The voltage dividing module is connected with the coil to be controlled in series and connected between the midpoint of the first bridge arm and the midpoint of the second bridge arm in series, and the voltage drop of the two ends of the voltage dividing module is preset voltage; the control module is connected with the control end of the current adjusting circuit and the two ends of the sampling module and used for obtaining the sampling voltage of the two ends of the sampling module and controlling the working state of the current adjusting circuit according to the sampling voltage and the target current of the coil to be controlled so as to adjust the current of the coil to be controlled to the target current, the adjustable range of the current value on the coil to be controlled is related to the preset voltage. And the current on the coil can be conveniently and more accurately controlled.

The application discloses an energy feedback device and method of a magnetic suspension bearing system and a magnetic suspension system. The energy feedback device comprises a first energy feedback path composed of a motor, a controllable inverter module, a power module and a magnetic suspension bearing system connected in sequence, and a second energy feedback path composed of the motor, the controllable inverter module, a path switching module and the magnetic suspension bearing system connected in sequence. When the commercial power is abnormally cut off, the motor is idled to generate electric energy feedback, and the electric energy is transmitted to the magnetic suspension bearing system through the first energy feedback path according to a first energy feedback voltage; when it is monitored that the bearing voltage of the magnetic suspension bearing system is less than the stable working voltage thereof, the first energy feedback voltage is adjusted to be a second energy feedback voltage, and the magnetic suspension bearing system is supplied with energy through the second energy feedback path, so that the magnetic suspension bearing system continues to keep a working state, the working time is prolonged, and the rotor zero-speed drop is ensured.

A control system for controlling a magnetic suspension system includes controllers each being configured to control one or more of magnetic actuators magnetically levitating an object. One of the controllers is configured to operate as a master controller and other one or ones of the controllers are configured to operate as one or more slave controllers. The master controller is communicatively connected with one or more digital data transfer links to the one or more slave controllers and configured to control operation of the one or more slave controllers. The control system makes it possible to implement a centralized control with separate controllers, and thereby without a need for a controller having a high number of controller current sources.

The invention relates to the technical field of magnetic suspension systems, and particularly discloses a magnetic suspension rotor speed control system based on a neural network, which comprises an embedded controller, an instruction unit, a speed unit, an execution unit, a judgment unit and a control unit, the control unit adaptively adjusts PID parameters through a BP neural network, performs speed adjustment and updating in real time, then enters the execution unit for actual execution verification, judges whether to enter the speed unit again through the judgment unit, and performs a new round of execution verification and recursive execution until the judgment unit meets the requirements. The method is applied to the field of magnetic suspension rotor speed control, overcomes the defects that parameters in a conventional PID controller adopted in a control system of a magnetic suspension rotor are difficult to adjust, and the parameters are fixed and are difficult to face a complex time-varying system, automatically sets the parameters of the PID controller by adopting the self-learning capability of a BP neural network, adaptively adjusts the PID parameters, and improves the speed of the magnetic suspension rotor. And the robustness and reliability of the control system are improved.

A magnetic bearing system (100) includes a rotary shaft (101) and a magnetic bearing (105, 107, 130) having an electromagnet coil (106, 108, 108B, 135, 136). One end of the electromagnet coil (106, 108, 108B, 135, 136) is connected to the neutral point of a first multi-phase winding (113, 115, 123, 125, 173, 181) having at least three or more phases.