Vibration Characteristics of Thomson Coil Actuator Based on Simulation and Experiments

Zhu, Zhexiao; Yuan, Zhao; Chen, Lixue; He, Junjia; Zhu, Zheran

doi:10.1109/tec.2020.2981291

Cited by 13 publications

(5 citation statements)

References 19 publications

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“…TCA is an ultra-fast switch, and it is used in hybrid circuit breakers and various applications [29][30][31][32][33]. A Thomson coil has a spiral shape and operates by flowing a pulse current of several kA through a capacitor bank.…”

Section: Thomson Coil Actuator Overview and Constructionmentioning

confidence: 99%

Hybrid Z-Source Circuit Breaker with Thomson Coil for MVDC

Lee,

Kang,

Rhee

et al. 2023

Energies

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Hybrid circuit breakers are the most promising circuit breakers among DC circuit breakers. Conventional hybrid circuit breakers complete fault current isolation by converting current to IGBT when fault current occurs. However, in this case, the fault current continues to increase, so the IGBT must be large enough to withstand this current. In addition, in the case of a method of detecting and operating a fault, a delay time of up to hundreds of microseconds occurs, and in a hybrid circuit breaker, this delay time is a very large value. To solve this problem, this paper proposes a hybrid Z-source circuit breaker that operates without delay for low-impedance faults. The proposed breaker is designed to reduce stress on IGBTs and mechanical switches by generating a current zero crossing, as well as to enable the breaker to trip quickly in high-risk cases such as low-impedance fault circuits. Due to the limited environment of the laboratory, we performed 600 V fault isolation experiments. As a result of the experiment, it was confirmed that the proposed circuit breaker successfully isolated the fault within 1.6 ms. The current limiting feature of the Z-source appears to reduce stress on the IGBTs and MOVs used, and it allows for faster fault isolation.

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Section: Thomson Coil Actuator Overview and Constructionmentioning

confidence: 99%

Hybrid Z-Source Circuit Breaker with Thomson Coil for MVDC

Lee,

Kang,

Rhee

et al. 2023

Energies

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“…FEM not only reduces the effort that is required for trial-anderror on experiment design, setup, and optimization, but also is able to observe more detailed data. FEM has been used to calculate the nonlinear relationship among displacement, flux linkage, and current [10]- [13], and to calculate the displacement and coil current under various fault conditions [14]. In principle, FEM-based ETCs estimation needs to solve a set of differential equations based on Maxwell's equations.…”

Section: Contactor Laser Displacement Sensormentioning

confidence: 99%

“…u 1 can be obtained directly from the supply voltage, which corresponds to u in Eq. (10). The oscilloscope triggers the sampling to obtain the potentials u 2 and u 3 .…”

Section: A Required Datamentioning

confidence: 99%

Energy Conservation Model for Electromechanical Transient Characteristics of Electromagnetic Actuators

You

Liang

et al. 2022

IEEE Trans. Energy Convers.

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Fault diagnosis and bounce reduction of electromagnetic actuators require one to obtain the electromechanical transient characteristics (ETCs) in real-time. ETCs can be measured by sensors, but due to their large size and intrusiveness, the approach has its limitations. Acquiring ETCs through finite element method (FEM) could be an alternative, except that FEM is known to be time consuming. In contrast, real-time measurement of coil current is not subjected to these restrictions, yet, it has not been properly utilized for calculating ETCs. In this regard, this paper analyzes the source of the armature kinetic energy, and thus proposes a model based on energy conservation (ECM), describing the relationship between the mechanical and electrical characteristics. Based on the model, ETCs can be calculated from coil current, moving part mass, and the static counterforce. To exemplify the effectiveness of the procedure, an electromagnetic contactor is considered, and the results obtained using the ECM are found fairly consistent with that obtained using sensors. The merit of the proposed ECM lies in its nonintrusive nature and its ability to circumvent the time-consuming FEM in calculating ETCs.

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“…The literature [18][19][20] mainly studied the solenoid and coil-disc and the new electromagnetic repulsion mechanism with double coils, which provided the basis for the research of electromagnetic repulsion mechanism for high voltage circuit breaker in long stroke. The literature [21][22][23] established a flexible body model with coupled circuit, electromagnetic field and structural force field, and studied the stress distribution and motion characteristics of the mechanism in the driving phase, buffer phase and inertia phase, respectively. However, there are only single-parameter simulations for the structural parameters of the long-stroke electromagnetic repulsion mechanism, and there is no systematic optimization result that can take into account the structural strength and driving performance.…”

Section: Introductionmentioning

confidence: 99%

Structural Optimization Design of Electromagnetic Repulsion Mechanism Based on BP Neural Network and NSGA‐II

Ding,

Yuan

et al. 2023

IEEJ Transactions Elec Engng

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The long‐stroke electromagnetic repulsion mechanism is subjected to large stresses during the driving phase, and the repulsion disc is prone to fracture due to excessive vibration amplitude up and down. Therefore, it is necessary to reduce the peak stress and vibration amplitude of the repulsion disc, improve the mechanical life, and improve the driving performance without decreasing the motion displacement, but it is not possible to do so at present. To address this problem, this paper takes the ‘coil‐repulsion disc type’ electromagnetic repulsion mechanism as the research object, and builds a simulation model of electromagnetic repulsion mechanism with structural strength and driving performance by using finite element simulation software, and analyzes the effects of four structural parameters, namely, the height of the repulsion disc, the inner diameter of the repulsion disc, the radius of the circular table and the radius of the chamfer, on the displacement and stress distribution of the model. After that, 39 sets of samples were output by BBD experimental design method, which were introduced into the BP neural network prediction model and combined with NSGA‐II algorithm to optimize the structure of the electromagnetic repulsion mechanism. The simulation results show that with the repulsion disc height of 14 mm, the repulsion disc inner diameter of 14 mm, the radius of the circular table is 29.78 mm and the chamfer radius of 7.06 mm, the peak stress of the repulsion disc of the electromagnetic repulsion mechanism is reduced by 57.83%, the amplitude of the repulsion disc is reduced by 3.24 mm, the peak electromagnetic repulsion force is increased by 7.52 kN and speed at the end of 3 ms increased by 9.8%. Under the condition of satisfying the constraints and increasing the overall displacement, the structural strength is increased and the driving performance of the mechanism is ensured to be improved, providing reasonable mechanism parameters for the opening and closing requirements of the fast mechanical switch. © 2023 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

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Vibration Characteristics of Thomson Coil Actuator Based on Simulation and Experiments

Cited by 13 publications

References 19 publications

Hybrid Z-Source Circuit Breaker with Thomson Coil for MVDC

Hybrid Z-Source Circuit Breaker with Thomson Coil for MVDC

Energy Conservation Model for Electromechanical Transient Characteristics of Electromagnetic Actuators

Structural Optimization Design of Electromagnetic Repulsion Mechanism Based on BP Neural Network and NSGA‐II

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