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Синхрондуу супер магниттик мотордун дизайны

Синхрондуу супер магниттик мотордун дизайны

Design of a super magnet motor synchronous.

Permanent magnet synchronous motor (PMSM) for a super magnet motor centrifugal compressor drive application. The PMSM has an output power of 2000 W at 200,000 rpm with 28 V dc power supply. It is designed for operation at a cryogenic temperature of 77 K. The designed PMSM is a 2-pole, 3-phase slotless structure. The permanent magnet is centrally located inside the hollow shaft. Multi-strand twisted Litz-wire is used to reduce eddy current loss in the winding. The criteria of selecting materials for the super-high speed and cryogenic application are presented. Possible structures of the rotor and stator are considered and simulated using finite element method (FEM). Mechanical stress simulation and rotor dynamic issues are also considered. The connections of low pass filters to reduce switching harmonics of pulse-width modulation (PWM) and to reduce circulating current are also discussed. The first prototype has been fabricated and tested at room temperature.

A new collaborative design scheme of a super magnet motor permanent-magnet synchronous motor (PMSM) and its digital controller is presented, which provides a low-cost but highly efficient motor system with guaranteed stability and performance. Since the systematic design of the PMSM can ensure its stability over the full operating speed range, a simple and reliable open-loop controller can be designed for the super-high-speed motor. With stability assurance, an optimal digital control is also designed in order to enhance the efficiency and performance of the PMSM. The unique feature in the proposed optimal V/f control is its design consideration to the stator resistor, which is generally neglected in most V/f controls but cannot be neglected in the super-high-speed motor owing to the extra small-size requirement. The simulation and stability analysis for various design options are provided. Finally, simulation and experimental results validate the design technique and its effectiveness.

Synchronous Motor(LSPMSM) with super premium efficiency, including design consideration and evaluation for motor starting-up, key performance, advanced finite element analysis(FEA) for the design, improvement and verification, prototype build and test, design and test data comparison to Premium Efficient Induction Motor(PEIM). To assess the design technology, LSPMSM prototype was built amended from a PEIM with the same frame, stator punching and rated output. Based on the prototype test, two novel improvement designs and analyses have been done to eliminate the noise and vibration. Additionally, the comparisons with PEIM on power factor, efficiency, frame size and active material consumption indicated the significant performance improvement and active material cost down can be achieved by LSPMSM.

DSP-based controller for a super high-speed (80,000 rpm) permanent magnet synchronous motor (PMSM). The PMSM is a key component of the centrifugal compressor drive of a reverse Brayton cryocooler that is currently under development for NASA and Florida Solar Energy Center. The design of the PMSM open-loop control is presented. Experimental results with open-loop control schemes are presented. System optimization and analysis are also illustrated. They verify the effectiveness of the controller design and the optimization scheme.

Синхрондуу супер магниттик мотордун дизайны

In order to solve the restrictions, imposed by the position sensor, on the application of the permanent magnet synchronous motor(PMSM) in the robot field, a rotor position estimation method based on super-twisting sliding mode observer(STSMO) is proposed. The observer is built according to the back electromotive force(EMF) model after the back EMF equivalent signal is obtained. In this way, not only are low-pass filter and phase compensation module eliminated, but also estimation accuracy is improved. Then, the Lyapunov stability analysis is carried out to verify the stability of SPMSM control system. Finally, Numerical simulations is carried out on Matlab/Simulink, the results demonstrate that the STSMO can effectively estimate rotor position and velocity, and the system has good dynamic and static performance.

Electromagnetic oscillations resulting from slender permanent magnet rotor eccentricity and close pole-slot number for unit combination super magnet motor submersible permanent magnet motor( UCST-SPMM),the composition and structure characteristics of UCST-SPMM were introduced,the radial air gap flux density and electromagnetic force wave spectrum characteristics for UCST-SPMM with 10 poles and 12 slots were analyzed. Taking slender rotor eccentricity into account,different rotor eccentricity on the influence of the electromagnetic force frequency spectrum was calculated. Prototype was developed for electromagnetic noise test by the method of sound pressure. The theoretical and experimental results verify the accuracy of rotor eccentricity vibration with FEM.

The motor that [project], which provides, to be reduced energy loss, improve efficiency. [solution] reduces the flux that floats by super magnet motor or in the past no iron of generator, and flux line is concentrated in the air gap, increases the air gap flux density. Using motor or generator of the invention, have motor of rotation, three component parts of permanent magnet stator and sleeveless. The shielding of motor, sleeve are the hollow cylinders being suitble between motor and stator, and internal multiple high temperature supraconductors are configured at its critical-temperature temperature below cooling. These supraconductors can change the direction of flux, on the optimum position of optimization efficiency.

Demagnetization fault causes the performance degradation of a permanent magnet synchronous motor (PMSM) drive system. Therefore, it is of great importance to reconstruct demagnetization fault in real-time. This paper firstly presents a demagnetization fault reconstruction method for a six-phase permanent magnet super magnet motor. A super-twisting algorithm-based sliding-mode Luenberger observer (STA-SMLO) is designed. It can eliminate the chattering of the sliding mode observer (SMO) and effectively isolate the influence of motor speed on the observer. The mathematical model of the demagnetized SP-PMSM is constructed by the vector space decomposition (VSD). Then, an STA-SMLO, which combines a super magnet motor algorithm-based sliding-mode observer (STA-SMO) with a Luenberger-observer (LO), is designed to reconstruct the demagnetization fault of the SP-PMSM precisely. Moreover, a strong Lyapunov function is designed to ensure the stability of STA-SMLO.

Синхрондуу супер магниттик мотордун дизайны

Second order sliding mode and conventional proportion/integral control for permanent magnet synchronous motor is accomplished that is used as propulsion machine in ship applications. Super magnet motor algorithm pertain second order sliding mode control structure and enables superiorities with regard to robustness against nonlinear and including uncertainties systems, at the same time disturbance and perturbance effects in comparison with conventional proportion/integral and sliding mode method. Additionally, the method, which is studied.

The utility model is a multifunctional permanent-magnet super-power drive motor capable of automatic power and torque increasing and decreasing, power generating and charging, belongs to the technical field of permanent-magnet motors and mainly provides a permanent-magnet motor for vehicles. The drive motor is mainly characterized in that an outer shell is internally provided with inner shell bodies which are different in diameter and have open outer ends; stators are stator core wire bars attached to the inner walls of the outer shell and the inner shell bodies; a main power shaft is equipped with a main shaft magnetic isolation layer lining, a main shaft integral rotor magnet steel body and a rare earth permanent magnetic strip; hierarchic integral rotor magnet steel bodies are arranged between the inner shell bodies and between the inner shell bodies and the outer shell, the inner wall of the integral rotor magnet steel body of each layer is provided with an integral precision casting magnetic isolation.

The motor has right, left and central bearing shells holding a bearing outer ring radially against an aluminum outer housing , and axially connected with a bearing cover . The outer ring is super magnet motor against an insulating and retaining part and an outer soft iron sheet pole. The outer ring is tangential at the shells by teeth. A mechanically rotating bearing keeps the pole to poles of adjacent phases. The housing receives a radial force and an axial force from the cover through grooves and an inner safety ring or the cover.

Синхрондуу супер магниттик мотордун дизайны

A supersonic motor provided at the outer periphery or the upper surface or the lower surface of the outer peripheral portion of a rotary member with a first track on which magnetic poles are continuously alternately magnetized and a second track on which at least one magnetic pole is magnetized at one place, the first and second tracks being disposed through a not-magnetized member; and with a magnetic encoder opposite to the first and second tracks for detecting a rotational position and the speed of a rotor ; so that the magnetic sensitive element detects variation in the magnetic flux of the first track and second track caused by rotation of the rotor and sends a signal to a position control circuit and a speed control circuit, resulting in that a command signal generated from the respective control circuits can improve accuracy for the position and speed control of the super magnet motor.

The super-twisting algorithm (STA, a class of second-order sliding mode control (SOSMC)) is widely used in permanent magnet linear synchronous motor (PMLSM) systems for its least amount of information and simplest calculations among the SOSMC algorithms. Due to the discretization and sign function of the STA, the chattering problem may be induced. In this paper, we propose an STA method with a defined boundary layer (called δSTA) to further reduce chattering in high-precision positioning system. With the δSTA method, when the sliding variable crosses the zero point, the speed is adjusted via two different saturation functions, instead of discontinuous sign functions of the STA. The proposed control law was proven to be stable, ensuring the establishment of a second-order sliding mode. Both the simulation and experimental results showed that the proposed control scheme, with a defined boundary layer width, can improve the steady-state positioning accuracy and significantly reduce system chattering.

The direct-drive ring permanent magnet torque motor is easily affected by parameters changes and the load torque disturbances, which reduces the servo performance of the system. In order to enhance the robustness of the servo system, the super twisting algorithm based on the second order sliding mode control (SMC) is proposed as the speed controller of the direct-drive servo system. The super magnet motor need not know the information of the sliding mode time derivative, which through the continuous control measure the sliding mode and its derivative approach zero in finite time. This method not only guarantees the robustness of the servo system and eliminates chatting, but also enhances the static precision of the servo system. The simulation results show that the servo system of the direct-drive NC rotary table has a very strong robustness by adopting the control method against parameters changes and the external disturbances.

Optimal V/f control for a super high speed permanent magnet synchronous motor (PMSM) is presented. The stator resistance of PMSM is generally neglected in design of a V/f control and compensated only by a boost voltage. However, due to the extra small size requirement of the proposed super high speed PMSM, stator resistance cannot be neglected any more. In this paper, the optimal design of a V/f control curve with consideration of the stator resistance is provided. The effect of the stator resistor to the V/f control curve is analyzed, it enables utilization of a simple and easy V/f control curve for an open-loop control of the super high speed PMSM. Simulation results are illustrated to show the effectiveness of the proposed design technique.

Синхрондуу супер магниттик мотордун дизайны

An ultra high-speed permanent-magnet synchronous motor (PMSM), which is applied to a super magnet motor of an automotive engine. Although the motor is driven by an inverter with a 12-V DC bus voltage due to an automotive power source, it achieves the maximum rotating speed of 150000 r/min and the rated output of 1.5 kW. Since the power source strictly restricts the motor terminal voltages and the fundamental operating frequency is as high as 2500 Hz, it is significant to pursue further reduction of the synchronous impedance in the motor, paying attention to its permeance coefficient. In the paper, a FEM-based electromagnetic field analysis is conducted, followed by a theoretical discussion on the optimum machine design. In addition, the mechanical structure is discussed to produce a real machine. The developed prototype has a variety of unique features from electrical and mechanical viewpoints, and some experimental test results are presented to demonstrate its potential.

Line Start-up Permanent Magnet Synchronous Motor(LSPMSM) with super premium efficiency, prototype build and test, design and test data comparison to Premium Efficient Induction Motor(PEIM). To assess the design technology, LSPMSM prototype was built amended from a PEIM with the same frame, stator punching and rated output. Based on the prototype test, two novel improvement designs and analyses have been done to eliminate the noise and vibration. Additionally, the comparisons with PEIM on power factor, efficiency, frame size and active material consumption indicated the significant performance improvement and active material cost down can be achieved by LSPMSM.

Imposed by the position sensor, on the application of the permanent magnet synchronous motor (PMSM) in the robot field, a rotor position estimation method based on super-twisting sliding mode observer (STSMO) is proposed. The observer is built according to the back electromotive force (EMF) model after the back EMF equivalent signal is obtained. In this way, not only are low-pass filter and phase compensation module eliminated, but also estimation accuracy is improved. Then, the Lyapunov stability analysis is carried out to verify the stability of SPMSM control system. Finally, Numerical simulations is carried out on Matlab/Simulink, the results demonstrate that the STSMO can effectively estimate rotor position and velocity, and the system has good dynamic and static performance.

Permanent magnet brushless motors are gaining popularity over conventional brushed motors as the industry is constantly requiring for higher efficiency and higher power density high speed electromechanical drivers. Together with advanced bearing and balancing technology, an operating speed of more than 100 krpm is no longer unachievable for commercial motors. However, this achievement comes with a drawback in terms of unpleasant noise level. With increasing awareness of the impacts of noise on human health, several countries start to implement regulatory noise limits on household appliances. In order to market the high speed motors, acoustic performance must be controlled to meet the noise regulations. In this paper, an experimental approach was used to analyze the sound power level of the super high speed permanent magnet brushless motor. The measurements were conducted in a hemi-anechoic chamber equipped with ten microphones.

Super-twisting nonlinear Fractional-order PID sliding mode control (ASTNLFOPIDSMC) strategy using extended state observer (ESO) for the speed operation of permanent magnet synchronous motor (PMSM) is proposed. Firstly, this paper proposes a novel nonlinear Fractional-order PID (NLFOPID) sliding surface with nonlinear proportion term, nonlinear integral term and nonlinear differential term. Secondly, the novel NLFOPID switching manifold and an adaptive super-twisting reaching law (ASTRL) are applied to obtain excellent control performance in the sliding mode phase and the reaching phase, respectively. The novel strategy is constructed by the ASTRL and the NLFOPID sliding surface. Due to the utilization of NLFOPID switching manifold, the characteristics of fast convergence, good robustness and small steady state error can be ensured in the sliding mode phase. Due to the utilization of ASTRL, the chattering phenomenon can be weakened, and the characteristics of high accuracy.

Синхрондуу супер магниттик мотордун дизайны

The demand on high-performance electrical machines has significantly increased for aerospace and transportation industries in recent years. A racing electric motorbike is a suitable platform to validate and prove new concepts and machine topologies before implementing them for passenger transportation applications. This paper describes the design and development of a high power density dual-rotor permanent magnet machine for an electric superbike. A holistic multi-domain design tool based on genetic algorithm-optimization is used for identifying the optimal slot-pole configuration and assist with the system architecture studies. The selected machine is then further refined and analyzed in conjunction with the power-electronic converter used for the application in hand.

Due to the problem of torque ripple and system robustness in direct torque control system of permanent magnet synchronous motor( PMSM),a torque control method based on Super-twisting sliding mode was adopted,and torque and flux linkage controller was designed in this paper. According to the characteristics of sliding mode variable structure control to suppresse the disturbance in the system,then the torque ripple was reduced and the robustness of the system was increased. At the same time,based on the analysis of Super-twisting algorithm,the switching function substituted for hyperbolic tangent function results that the system has no obvious chattering in high frequency motion,and the effect is fine. Compared with the conventional slow control,torque ripple of Super-twisting sliding mode control was significantly reduced,and more robust to motor disturbance. The simulation results verified the effectiveness of the method.

Since traditional sliding mode observer has inherent chattering problem, a discrete variable gain super-twisting sliding mode observer for permanent magnet synchronous motor is proposed. Firstly, the variable gain of the observer is dynamically adjusted with the motor speed and the internal state of system, so that the sliding mode chattering suppression in a wide range of variable speed conditions is achieved. Secondly, a first-order low-pass filter is designed to improve the robustness in the transient process of the sliding mode control system, and the convergence of sliding mode trajectory in finite time is proved based on reduction to absurdity. Finally, a new vector control strategy is proposed to fully decouple the d, q axis of current loop. Based on hybrid orientation, the effective back EMF component of axis is extracted from the observer output, and combine with the back EMF transformation matrix, feed forward compensation in the current loop is realized. Experimental results verify the effectiveness and practicability of the control strategy proposed in this paper.

Parameters of permanent magnet synchronous motor(PMSM)are susceptible to random and nonlinear noise disturbances.In direct torque control,observation accuracy is poor because pure integral is generally used in the calculation of stator flux,leading to torque ripple and flux pulses.To solve the problem,an extended Kalman filter(EKF)observer is used to make accurate observation of speed,position and flux of the PMSM.Meanwhile,as the PI controller is sensitive to changes in the motor parameters,a super-twisting controller is designed instead of a torque PI controller and a reference voltage vector estimation module.The function sigmoid(s)in a quasisliding mode is used to replace the symbol function sgn(s),improving robustness and reducing complexity of the system.Simulation results show that the EKF observer can accurately observe the speed,position and flux of the motor.The super-twisting controller can reduce torque ripples in the control system,and improve observation accuracy of the speed.

 

Because of lower inductance and higher commutation frequency, caused by high-frequency current harmonics induced by the PWM control, super high speed permanent magnet brushless motors commonly face overheating of both the rotor and stator. For chopping directly at the inverter, the frequency should be increased to reduce the current harmonics. But for the 10 kW class motor drives used in the air compressors of fuel cell vehicles, the power switch devices currently do not fulfill the needs of switch frequency and power simultaneously. Therefore, it is not a good choice to regulate the speed by chopping at the inverter. Aimed at reducing losses in the stators and rotors, this paper presented the design of a pre-Buck square wave drive for reducing current harmonics. By optimizing the back electromotive force (EMF) filter circuit and commutation compensation angle, the operation range of sensorless control CAN was extended to 3000-100000 r·min. The key points encountered during the drive development were analyzed and solutions proposed.

The utility model discloses a ceramic ball bearing structure of a super-speed permanent magnet motor. The ceramic ball bearing structure comprises a ceramic deep groove ball bearing, a bearing sleeve, a bearing inner cover and a bearing outer cover, wherein the ceramic deep groove ball bearing is sleeved on a motor rotary shaft; the bearing inner cover and the bearing outer cover are coaxial to the ceramic deep groove ball bearing; the bearing sleeve is sleeved outside the ceramic deep groove ball bearing; the bearing inner cover and the bearing outer cover are respectively blocked at the two axial sides of the ceramic deep groove ball bearing, and are adhered with the bearing sleeve. According to the ceramic ball bearing structure of the super-speed permanent magnet motor disclosed by the utility model, the ceramic deep groove ball bearing is adopted, so that the frictional coefficient and the noise under the super-speed are small.

Based on the analysis of reciprocal coupling of the permanent magnet synchronous motor(PMSM), this paper established a kind of simulated control system for mutual-feeding mutual-driving test to feed the regenerated energy back to the DC bus at the time of load motor's mutual-driving test via the four-quadrant converter, so as to circulate the energy between the two motors. The simulation experiments show that the hybrid absorption control of super capacitor and resistance can absorb the PMSM deceleration brake feedback energy, which not only improves the capacity usage ratio, but also makes the DC bus voltage stable in safe operation for the system.

A compound motor-generator system including a first motor-generator and a second motor-generator. The first motor generator includes a stator having a set of three-phase field windings and a first rotor disposed inside and coaxial with the stator and configured to rotate relative to the stator. The second motor-generator includes a rotational stator and a second rotor coupled to a common shaft with the rotor of the first motor-generator and disposed inside and coaxial to the rotational stator. The rotational stator is configured to rotate relative to the second rotor and at a higher rotational speed than the second rotor.

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