Compromised Vibration Isolator of Electric Power Generator Considering Self-Excitation and Basement Input

Park, Young Hwan; Kim, Tae‐Wan; Kim, Chan-Jung

doi:10.3390/inventions8010040

Cited by 4 publications

(8 citation statements)

References 22 publications

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“…This result differed from that reported in an earlier study [24]. The complete performance indices are summarized in Table 5, and two performance indices (first and second) are shown in Figure 4.…”

Section: Evaluation Of Mechanical Properties Of Two Sub-mounts In Mimmcontrasting

confidence: 84%

“…system including the MIMM. The original system model was consistent with those developed in previous studies [23,24]. However, the target system model is an extended version derived from the original by incorporating variable stiffness and damping coefficients in both the upper and lower sub-mounts, as illustrated in Figure 1.…”

Section: Evaluation Strategy For Mimm At Electric Power Generatormentioning

confidence: 96%

“…This study is an extension of a previous study, which partially focused on the optimal selection of the mechanical properties of the lower sub-mount under the assumption of a fixed mechanical property of the upper sub-mount [24]. The system model of an electric power plant was revised by incorporating variable coefficients within the two sub-mounts, rendering the proposed model suitable for MIMM optimization.…”

Section: Evaluation Strategy For Mimm At Electric Power Generatormentioning

confidence: 99%

“…The mechanical properties of the lower sub-mount (spring 𝐾 , damper 𝐶 ) were adjusted from the values The theoretical model for the supported power generator in Figure 3 can be expressed as a linear formula because all connecting elements consist of linear connecting elements: the stiffness coefficient is proportional to the displacement and the damping coefficient is proportional to the velocity. Based on an earlier study [24], the governing equations are expressed as Equations ( 1)-( 3). The displacements of the three concentrated masses M p , M M , and M B , were denoted by X p , X M , and X B , respectively.…”

Section: Evaluation Strategy For Mimm At Electric Power Generatormentioning

confidence: 99%

“…The solution for the three displacement variables can be effectively obtained through Fourier transforms, therein the variable 's' is substituted with 'jω' in the Equations ( 1)-( 3) originally formulated in the Laplace domain. Two performance indices developed in earlier studies [23,24] were reused. The first and second performance indices are related to the self-excitation of the basement input, as shown in Equations ( 4) and ( 5), respectively.…”

Section: B + C M (∆)mentioning

confidence: 99%

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Tuning of Two Sub-Mounts in Mass-Block Integrated Mount Module over Self-Excitation and Basement Input

Kim,

Kim

2023

Applied Sciences

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If an unexpected vibration or force is expected to be generated during operation, a vibration mount must be installed beneath the support system. A mass-block can be considered to reduce the structure basement fundamental frequency of the basement. Thus, the efficiency of a single-mount or mass-block can be enhanced by implementing a single-mount module called a mass-block integrated mount module (MIMM). This study addressed the tuning process of multiple mount modules in a supported system by evaluating the mount module using the proposed total performance index, building on a previous evaluation method comprising the first and second performance indices. This index was subsequently applied to assess the control capability of MIMM concerning both the self-excitation of an electric power plant and basement input. The extended 3-degrees-of-freedom (3-d.o.f.) electric power generator model was applied to determine the best selection of the mechanical properties for the MIMM over the various mechanical parameter settings (ranging between 10 and 1000% of the original parameters) of the two sub-mounts. The simulation results demonstrate a reduction in the total performance index from 8.2, as calculated in a previous study, to 0.2. The novelty of the optimal MIMM conditions is confirmed by the simultaneous enhancement of both performance indices.

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Section: Evaluation Of Mechanical Properties Of Two Sub-mounts In Mimmcontrasting

confidence: 84%

Section: Evaluation Strategy For Mimm At Electric Power Generatormentioning

confidence: 96%

Section: Evaluation Strategy For Mimm At Electric Power Generatormentioning

confidence: 99%

Section: Evaluation Strategy For Mimm At Electric Power Generatormentioning

confidence: 99%

Section: B + C M (∆)mentioning

confidence: 99%

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Tuning of Two Sub-Mounts in Mass-Block Integrated Mount Module over Self-Excitation and Basement Input

Kim,

Kim

2023

Applied Sciences

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Optimal Dispatch Strategy for a Distribution Network Containing High-Density Photovoltaic Power Generation and Energy Storage under Multiple Scenarios

Hou,

Chen,

Wang

et al. 2023

Inventions

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To better consume high-density photovoltaics, in this article, the application of energy storage devices in the distribution network not only realizes the peak shaving and valley filling of the electricity load but also relieves the pressure on the grid voltage generated by the distributed photovoltaic access. At the same time, photovoltaic power generation and energy storage cooperate and have an impact on the tidal distribution of the distribution network. Since photovoltaic output has uncertainty, the maximum photovoltaic output in each scenario is determined by the clustering algorithm, while the storage scheduling strategy is reasonably selected so the distribution network operates efficiently and stably. The tidal optimization of the distribution network is carried out with the objectives of minimizing network losses and voltage deviations, two objectives that are assigned comprehensive weights, and the optimization model is constructed by using a particle swarm algorithm to derive the optimal dispatching strategy of the distribution network with the cooperation of photovoltaic and energy storage. Finally, a model with 30 buses is simulated and the system is optimally dispatched under multiple scenarios to demonstrate the necessity of conducting coordinated optimal dispatch of photovoltaics and energy storage.

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Evaluation of the Supporting Mounts of a Three-in-One Electric Drive Unit Using a Hybrid Simulation Model

Park,

Kim,

Kang

2023

Machines

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The 3-in-1 electric drive unit (EDU) has the advantage of increasing the motor size for a larger output, and the reducer can be a compact layout designed to incorporate three key components—the drive motor, inverter, and reducer—into a single main body. This paper explores a hybrid simulation model for a 3-in-1 electromechanical drive unit (EDU) and its supporting components, consisting of the gear drive unit (GDU) mount, the motor mount, and the roll rod mounts. The synthesis of these sub-components, including the 3-in-1 EDU itself, the three supporting mount modules, and a rigid-body finite element model, is presented. The dynamics of the 3-in-1 EDU were determined through an experimental modal test. Meanwhile, the dynamic stiffness and damping coefficients of the three supporting mounts were measured using an elastomer tester across a frequency range from 10 Hz to 1000 Hz. To evaluate the sensitivity of each mount, the total spectral responses of the 3-in-1 EDU were compared under a torque input, considering rigid connections for each mount in contrast to their original dynamic stiffness. Through installing a rollrod mount, the optimal rigid connection was identified to control the dynamic response of the 3-in-1 EDU hybrid model. Furthermore, simulation results for the rigid connections in each mount were validated against experimental findings, confirming that the rigid rollrod mount configuration provided the best results.

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Compromised Vibration Isolator of Electric Power Generator Considering Self-Excitation and Basement Input

Cited by 4 publications

References 22 publications

Tuning of Two Sub-Mounts in Mass-Block Integrated Mount Module over Self-Excitation and Basement Input

Tuning of Two Sub-Mounts in Mass-Block Integrated Mount Module over Self-Excitation and Basement Input

Optimal Dispatch Strategy for a Distribution Network Containing High-Density Photovoltaic Power Generation and Energy Storage under Multiple Scenarios

Evaluation of the Supporting Mounts of a Three-in-One Electric Drive Unit Using a Hybrid Simulation Model

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