Design and Static Performance Analysis of a Novel Axial Hybrid Magnetic Bearing

Liu, Xianxing; Dong, Jinyue; Du, Yi; Shi, Kai; Mo, Lihong

doi:10.1109/tmag.2014.2327165

Cited by 21 publications

(8 citation statements)

References 6 publications

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“…• an external force added to the force balance; in practical cases, such contribution can derive from vertical attraction forces between the rotor and the stator of the electrical machine; Figure 15 shows the overall scheme of the AHMB control system, incorporating both the outer loop regulating the air-gap dynamics and the inner loops regulating the electrical supply of the UCs and the LC. The reference for the ampere-turns is generated by a PID regulator according to the air-gap deviation ∆g obtained from the integration of (12). The transfer function F PID (s) of the PID regulator has a classical formulation, including a derivative filter coefficient K N to limit the high spikes typical of the pure derivative action.…”

Section: Overall Modelmentioning

confidence: 99%

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Design and Modeling of an Integrated Flywheel Magnetic Suspension for Kinetic Energy Storage Systems

2020

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The paper presents a novel configuration of an axial hybrid magnetic bearing (AHMB) for the suspension of steel flywheels applied in power-intensive energy storage systems. The combination of a permanent magnet (PM) with excited coil enables one to reduce the power consumption, to limit the system volume, and to apply an effective control in the presence of several types of disturbances. The electromagnetic design of the AHMB parts is carried out by parametric finite element analyses with the purpose to optimize the force performances as well as the winding inductance affecting the electrical supply rating and control capability. Such investigation considers both the temperature dependence of the PM properties and the magnetic saturation effects. The electrical parameters and the force characteristics are then implemented in a control scheme, reproducing the electromechanical behavior of the AHMB-flywheel system. The parameter tuning of the controllers is executed by a Matlab/Simulink code, examining the instantaneous profiles of both the air-gap length and the winding ampere-turns. The results of different dynamic tests are presented, evidencing the smooth air-gap changes and the optimized coil utilization, which are desirable features for a safe and efficient flywheel energy storage.

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Section: Overall Modelmentioning

confidence: 99%

“…Different configurations of such MB types are proposed. In [12], there are two E-shaped stator cores hosting two PM rings and two control coils in suitable slots. The rotor consists of a plane disc sandwiched between the two stator iron cores.…”

Section: Introductionmentioning

confidence: 99%

Design and Modeling of an Integrated Flywheel Magnetic Suspension for Kinetic Energy Storage Systems

2020

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“…From the derivation process, it can be seen that the only work needed to be done is the addition of 1.7µ 0 (2Rθ + l) + 5.2µ 0 δ(ω) to the frontal permeance no matter the number of poles the HMB have. Taking the four-pole type of HMB in [27] as an example, the common control magnetic circuit is shown in Figure 7a and the equivalent magnetic circuit considering the edge effect is shown in Figure 7b.…”

Section: Magnetic Bearings With Different Configurationsmentioning

confidence: 99%

Modeling for Three-Pole Radial Hybrid Magnetic Bearing Considering Edge Effect

Zhu¹,

Shuling²,

Jv³

2016

Energies

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Abstract:In order to overcome the shortcoming of magnetic bearings whereby general mathematical models of the radial suspension forces cannot be accurately established, a mathematical model considering the edge effect is set up. The configuration, operation principle and flux distribution features of a three-pole radial hybrid magnetic bearing (HMB) are analyzed in this paper. The magnetic field division method is employed to calculate the permeance of different regions around the end portion of poles. The total permeance of a single pole is composed of the permeance of the regions. Then, an accurate mathematical model of the radial suspension forces considering the edge effect is deduced by the equivalent magnetic circuit method. From the modeling procedures, it can be seen that the edge effect calculation is only related to the configuration and parameters of the magnetic poles, and is isolated with the other configurations and parameters of the three-pole radial HMB, therefore, the mathematical model is proved universal for calculating different suspension forces of hybrid magnetic bearings. A finite element analysis (FEA) simulation and three-pole radial HMB experiments are performed. The error between the theoretical calculation values and the FEA simulation values of the suspension forces is less than 5%, and the error between theoretical calculation value and experimental value of suspension forces is less than 7%. The comparison between the results of the theoretical calculation, FEA simulation and experiments has verified that the established mathematical model can accurately calculate the suspension forces.

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“…Meanwhile, differential control method has often been adopted [14][15][16][17][18][19][20]. Because the force between the stator and rotor is always an attractive force in an active magnetic bearing (AMB), when the rotor is located in the center position without control current, the attractive forces of two magnetic bearings are the same in the opposite directions.…”

Section: Introductionmentioning

confidence: 99%

Integrated Design and Optimization Method of an Asymmetric Hybrid Thrust Magnetic Bearing With Secondary Air-Gap

Ren¹,

Le²,

Wang³

2017

PIER B

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Abstract-In this paper, an asymmetric thrust magnetic bearing (MB) design principle and method are introduced. Different from the general design method of magnetic bearing, the asymmetric magnetic bearing design method focuses on the effect of asymmetric factor. A permanent magnet biased asymmetric hybrid thrust magnetic bearing (AHTMB) with secondary air-gap is designed in detail. A multi-objective optimization is conducted with genetic algorithm (GA) to get smaller mass and less loss. According to optimized model parameters, magnetic field distribution, stiffness and effect of asymmetry factor on stiffness are also analyzed. For stability of the system, equivalent stiffness and equivalent damping and current characteristics are deduced. Based on the analysis results and design methods, appropriate asymmetry factor asymmetric can be chosen to satisfy the different bias force requirement. With small number of coils and current, AHTMB with secondary air-gap is beneficial for decreasing the copper loss and enhancing dynamic performance of control system.

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Design and Static Performance Analysis of a Novel Axial Hybrid Magnetic Bearing

Cited by 21 publications

References 6 publications

Design and Modeling of an Integrated Flywheel Magnetic Suspension for Kinetic Energy Storage Systems

Design and Modeling of an Integrated Flywheel Magnetic Suspension for Kinetic Energy Storage Systems

Modeling for Three-Pole Radial Hybrid Magnetic Bearing Considering Edge Effect

Integrated Design and Optimization Method of an Asymmetric Hybrid Thrust Magnetic Bearing With Secondary Air-Gap

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