Unbalanced Magnetic Pull Compensation With Active Magnetic Bearings in a 2 MW High-Speed Induction Machine by FEM

Di, Chong; Petrov, Ilya; Pyrhönen, Juha; Bao, Xiaohua

doi:10.1109/tmag.2018.2837659

Cited by 38 publications

(19 citation statements)

References 21 publications

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“…There are not only rotor imbalance, but also lots of reasons, such as circumstance noise, measurement error, which can produce vibration disturbances. To avoid the deterioration of ILC-2 performance by the non-periodic signals, it is also necessary to extract the periodic components according to equations (2)- (5). Therefore, a parallel ILC mechanism shown in Figure 3 is adopted to realize ILC-2 expressed in equation (7).…”

Section: Parallel Ilc Mechanism Based On Cfcsmentioning

confidence: 99%

“…As a typical mechatronics system, active magnetic bearing(AMB) rotor system (AMBRS) of the primary helium circulator (PHC) provides technical conditions for the high clean helium circulation system in the primary loop of the high-temperature gas-cooled reactor (HTR). 1 However, the AMBRS has some problems such as mass imbalance, sensor runout, asymmetrical circuit, misalignment of geometric centers between the rotor and the stator, [2][3][4][5] which would result in asymmetric magnetic forces produced by the AMB or the motor, and eventually lead to characteristic repetitive periodic rotor vibrations. Fortunately, the active control characteristics of AMB can provide favorable technical means for rotor vibration suppression of the PHC.…”

Section: Introductionmentioning

confidence: 99%

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A novel iterative learning control method and control system design for active magnetic bearing rotor imbalance of primary helium circulator in high-temperature gas-cooled reactor

Zheng

Liu

Zhao

et al. 2020

Measurement and Control

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As one of the key technologies of high-temperature gas-cooled reactor, primary helium circulator–equipped active magnetic bearing provides driving force for primary helium cooling system. However, repetitive periodic vibration produced by rotor imbalance may introduce risks to primary helium circulator (even for high-temperature gas-cooled reactors). First, this article analyzes a periodic component extraction algorithm which is widely used in active magnetic bearing rotor unbalance control methods and points out the problem that the periodic component extraction algorithm occupies numerous computing resources which cannot satisfy the real-time request of active magnetic bearing control system. Then, a novel iterative learning control algorithm based on the iteration before last iteration of system information (iterative learning control-2) and a plug-in parallel control mechanism based on the existing control system are put forward, meanwhile, an integrated independent distributed active magnetic bearing control system is designed to solve the problem. Finally, both the simulation and experiment are carried out, respectively. The corresponding results show that the control method and control system proposed in this article have significant suppression effect on the repetitive periodic vibration of the active magnetic bearing system without degrading the real-time requirement and can provide important technical support for the safe and stable operation of the primary helium circulator in high-temperature gas-cooled reactor.

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Section: Parallel Ilc Mechanism Based On Cfcsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A novel iterative learning control method and control system design for active magnetic bearing rotor imbalance of primary helium circulator in high-temperature gas-cooled reactor

Zheng

Liu

Zhao

et al. 2020

Measurement and Control

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show abstract

“…There are many researches on multi-frequency vibration caused by the geometric center misalignment between the rotor and the stator in traditional mechanical bearings [5][6][7][8][9][10][11]. Ruf [6] focused on the mechanical bearing load caused by unbalanced magnetic pull (UMP) based on an analysis of static and dynamic eccentricities at different positions and different amplitudes.…”

Section: Introductionmentioning

confidence: 99%

Study on Unbalanced Magnetic Pulling Analysis and Its Control Method for Primary Helium Circulator of High-Temperature Gas-Cooled Reactor

Zheng¹,

Mo²,

Sun³

et al. 2019

Preprint

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In addition to provide an extremely clean environment for primary loop of high-temperature gas-cooled reactor (HTR), the primary helium circulator (PHC) using electromagnetic levitation technology also provides an effective means for vibration control. Besides synchronous vibration produced by mass imbalance and sensor runout, double-frequency vibration produced by unbalanced magnetic pull (UMP) is serious in PHC engineering prototype (PHC-EP). In this paper, we firstly analyzed the mechanism of UMP and the multi-frequency vibration characteristics in combination with the PHC-EP. Then we put forward a distributed iterative learning control (ILC) algorithm and a parallel control scheme to suppress the periodic vibrations. Finally, we verified the methods by carrying out experimental researches on the active magnetic bearing (AMB) bench of PHC-EP. The results show that the methods put forward in this paper have significant control effect on the double-frequency vibration generated by UMP of the PHC-EP, and provide theoretical and practical references for the PHC safe operation in HTR.

show abstract

Section: Introductionmentioning

confidence: 99%

“…In the field of AMB, an investigation into the UMP effect on the static stiffness models of radial AMB in brushless direct current motor without load and with load conditions using the finite element method was reported by Han [10]. Moreover, the AMBs was designed and optimized with the consideration of gravity and UMP effects, and the required current compensation for the forces in the horizontal and vertical directions was studied during the operation and verified by the finite element method by Di [11].…”

Section: Introductionmentioning

confidence: 99%

Study on Unbalanced Magnetic Pulling Analysis and Its Control Method for Primary Helium Circulator of High-Temperature Gas-Cooled Reactor

Zheng

Sun

et al. 2019

Energies

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In addition to providing an extremely clean environment for primary loop of high-temperature gas-cooled reactor (HTR), the primary helium circulator (PHC) using electromagnetic levitation technology also provides an effective means for vibration control. Besides synchronous vibration produced by mass imbalance and sensor runout, double-frequency vibration produced by unbalanced magnetic pull (UMP) is serious in PHC engineering prototype (PHC-EP). In this paper, we firstly analyzed the mechanism of UMP and the multi-frequency vibration characteristics in combination with the PHC-EP. Then we put forward a distributed iterative learning control (ILC) algorithm and a parallel control scheme to suppress the periodic vibrations. Finally, we verified the methods by carrying out experimental researches on the active magnetic bearing (AMB) bench of PHC-EP. The results show that the methods put forward in this paper have significant control effect on the double-frequency vibration generated by UMP of the PHC-EP and provide theoretical and practical references for the PHC safe operation in HTR.

show abstract

Unbalanced Magnetic Pull Compensation With Active Magnetic Bearings in a 2 MW High-Speed Induction Machine by FEM

Cited by 38 publications

References 21 publications

A novel iterative learning control method and control system design for active magnetic bearing rotor imbalance of primary helium circulator in high-temperature gas-cooled reactor

A novel iterative learning control method and control system design for active magnetic bearing rotor imbalance of primary helium circulator in high-temperature gas-cooled reactor

Study on Unbalanced Magnetic Pulling Analysis and Its Control Method for Primary Helium Circulator of High-Temperature Gas-Cooled Reactor

Study on Unbalanced Magnetic Pulling Analysis and Its Control Method for Primary Helium Circulator of High-Temperature Gas-Cooled Reactor

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