Analytical Calculation of Active Magnetic Bearing Based on Distributed Magnetic Circuit Method

Jiang, Hao; Su, Zhenzhong; Wang, Dong

doi:10.1109/tec.2020.3040975

Cited by 22 publications

(5 citation statements)

References 21 publications

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“…David C. Meeker et al [13], taking the homopolar laminated radial magnetic bearing as the research object, proposed the analytical solution of rotor rotation loss and verified the correctness of the analytical solution by comparing the experimental data. Jiang et al [14] proposed a novel analytical calculation method based on distributed magnetic circuit method (DMCM) to solve the problem of coupled magnetic flux and saturation of active magnetic bearing (AMB). Cao, Y. et al [15] analyzed the loss and temperature of the hybrid magnetic bearings (HMB), and the results showed that the loss of HMB is mainly distributed in the rotor part, and the temperature of the rotor part is obviously higher than that of the stator part.…”

Section: Of 20mentioning

confidence: 99%

Simulation and Experiment Analysis of Temperature Field of Magnetic Suspension Support Based on FBG

Cong

Cui

et al. 2022

Sensors

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Temperature rise is an important factor limiting the development of magnetic suspension support technology. Traditional temperature sensors such as thermocouples are complicated and vulnerable to electromagnetic interference due to their point contact temperature measurement methods. In this paper, the equivalent model of magnetic suspension support is established, and the temperature field is simulated and analyzed by magnetic thermal coupling calculation in ANSYS software. Then, a quasi-distributed temperature measurement system is designed, and the FBG temperature sensor is introduced to measure the temperature of the magnetic suspension support system by “one-line and multi-point”. By comparing the analysis experiments and simulations, the equivalent accuracy of the simulation model and the FBG temperature sensor can accurately measure the temperature of the magnetic suspension support.

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Section: Of 20mentioning

confidence: 99%

Simulation and Experiment Analysis of Temperature Field of Magnetic Suspension Support Based on FBG

Cong

Cui

et al. 2022

Sensors

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“…M agnetic bearings (MBs) [1][2][3][4][5][6][7] are high-performance bearings that utilize electromagnetic forces to suspend rotating shafts in space. In contrast with traditional bearings, they offer numerous advantages, including frictionless operation, no need for lubrication, minimal losses, high rotational speeds, and active controllability.…”

Section: Introductionmentioning

confidence: 99%

Active Magnetic Bearing Three-level Modulation Strategy Based on Mixed Logical Dynamical Model Prediction Controller

Zou,

Jiang,

Yang

et al. 2024

PIER C

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Active magnetic bearings feature advantages of frictionlessness, low loss, and high reliability, making them extensively utilized in fields such as flywheel energy storage, aerospace, and beyond. However, conventional modulation strategies applied to digital control systems suffer from control delays, reducing current control precision and resulting in increased current ripple. To address the aforementioned issues, firstly, the operating principle of the active magnetic bearing drive system is analyzed. Based on hybrid systems theory, a mix logical dynamic model of the drive system is established by introducing auxiliary logical variables and auxiliary continuous variables to achieve three-level modulation. Secondly, integrating model predictive control theory, the established model is utilized as a predictive model to forecast and compensate for control delays in controlling current. Finally, a cost function is established based on the error between predicted current and reference current, and optimal control signals are generated to achieve precise control of the active magnetic bearings. The simulation results demonstrate that under light load conditions, the modulation strategy proposed in this paper reduces current ripple by 49.94% compared to traditional modulation strategies. Under moderate load conditions, the proposed modulation strategy reduces current ripple by 49.96%, while under heavy load conditions, it reduces current ripple by 49.99%. This validates the effectiveness of the proposed modulation strategy in compensating for control delays while retaining the three-level modulation scheme.

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“…Methods that rely on the equivalent magnetic circuit methods (EMC) can be also found and consist in drawing a magnetic circuit model of the machine with lumped or distributed reluctances parameters to model the machine's magnetic flux tubes and retrieve quantities like flux linkages and average flux density values [15,16]. A variety of hybrids methods of the previously mentioned ones are also present [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Analytical Modeling of Magnetic Field Distribution at No Load for Surface Mounted Permanent Magnet Machines

Gerlando

Ricca

2023

Energies

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This paper presents an analytical study of the air-gap magnetic field of a Surface Permanent Magnet (SPM) linear machine under no load. By means of the method of images, the complex expression of the magnetic field of a conductor, inside the air gap between two smooth iron surfaces, is retrieved. Then, integrating the conductor expression, the formulation of the magnetic field of a current sheet and thus the one of a SPM, using two vertical current sheets, is obtained. At last, the no-load magnetic field expression, for a generic time instant, of a slotless machine is retrieved. The novelty of the proposed approach is the availability, due to a different calculation approach, of a unique closed-form formulation for the slotless machine air-gap field, a quantity that, in literature, is usually present in Fourier series formulation. Additionally, as a means to calculate integral quantities and show the goodness of the method a complex slotting function is introduced to account for the slotted geometry. Finally, starting from Lorenz’s force formulation, the expression of the Maxwell tensor in complex form is retrieved and the contribution of forces, integral of the complex stress tensor quantity, will be calculated and compared with FEM simulations, showing a good agreement also with the analytical slotted model.

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Analytical Calculation of Active Magnetic Bearing Based on Distributed Magnetic Circuit Method

Cited by 22 publications

References 21 publications

Simulation and Experiment Analysis of Temperature Field of Magnetic Suspension Support Based on FBG

Simulation and Experiment Analysis of Temperature Field of Magnetic Suspension Support Based on FBG

Active Magnetic Bearing Three-level Modulation Strategy Based on Mixed Logical Dynamical Model Prediction Controller

Analytical Modeling of Magnetic Field Distribution at No Load for Surface Mounted Permanent Magnet Machines

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