Optimization design and energy-saving control strategy of high power dc contactor

Fang, Shuhua; Chen, Yong; Yang, Yanju

doi:10.1016/j.ijepes.2019.105633

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…Experts judged the relative importance of each criterion according to the 1-9 scale method and the evaluation data obtained were processed according to Equations (1)- (6). Taking the weight acquisition of the criteria layer to the target layer as an example, the fuzzy judgment matrix was obtained through data handling, and then the maximum eigenvalue and eigenvector of the fuzzy judgment matrix were calculated through defuzzification and using the MATLAB software.…”

Section: Constant Weight Recalculationmentioning

confidence: 99%

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Risk Assessment of New Energy Vehicle Supply Chain Based on Variable Weight Theory and Cloud Model: A Case Study in China

Yan

Zhang

et al. 2020

Sustainability

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In order to protect the environment and reduce energy consumption, new energy vehicles have begun to be vigorously promoted in various countries. In recent years, the rise of intelligent technology has had a great impact on the supply chain of new energy vehicles, which, coupled with the complexity of the supply chain itself, puts it at great risk. Therefore, it is quite indispensable to evaluate the risk of the new energy vehicle supply chain. This paper assesses the risks faced by China’s new energy vehicle supply chain in this period of technological transformation. First of all, this paper establishes an evaluation criteria system of 16 sub-criterion related to three dimensions: the market risk, operational risk, and the environmental risk. Then, variable weight theory is proposed to modify the constant weight obtained by the fuzzy analytic hierarchy process (FAHP). Finally, a risk assessment of China’s new energy vehicle supply chain is carried out by combining the variable weight and the cloud model. This method can effectively explain the randomness of matters, and avoid the influence of value abnormality on the criteria system. The results show that China’s new energy vehicle supply chain is at a high level. Through the identification of risk factors, mainly referring to the low clustering risk, technical level risk and information transparency risk, this paper can provide a risk prevention reference for corresponding enterprises.

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Section: Constant Weight Recalculationmentioning

confidence: 99%

“…Thus, the research on new energy vehicles mainly focuses on technology [6][7][8], operation mode [9][10][11][12], environmental protection assessment [13][14][15], market demand analysis [16,17], and so on. For example, Perera et al proposed a charging infrastructure planning model in the urban environment.…”

Section: Introductionmentioning

confidence: 99%

Risk Assessment of New Energy Vehicle Supply Chain Based on Variable Weight Theory and Cloud Model: A Case Study in China

Yan

Zhang

et al. 2020

Sustainability

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show abstract

“…At this point, the holding current required increases as the capacity of the MC increases [17,18]. Due to the characteristics of the MC, the holding current application time for which the contact is maintained is considerably higher; therefore, reducing the power in the holding state is significantly helpful in saving the system energy [19][20][21]. This study proposes a two-level exciting current-type electromagnetic contactor driver that can reduce the driving power using the characteristics of different conditions depending on the driving state of the electromagnetic contactor.…”

Section: Introductionmentioning

confidence: 99%

Two-Level Excitation Current Driver to Reduce the Driving Power of an Electromagnetic Contactor

Park,

Kim,

Lim

2024

Electronics

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As the capacity of the electrical system increases, so does the capacity of the electromagnetic contactor (MC). This increases the burden on the MC drive, which consumes unnecessary power in the system. MC is characterized by different initial starting-operating currents and holding currents to maintain contact. However, the operating voltage is constant regardless of the operating state. The initial starting current is considerably larger than that required to maintain contact. However, once the electromagnetic contactor is in the closed state, the current to maintain the contact is relatively small compared to the initial starting operating currents. Therefore, this study proposes two types of two-level excitation-current type MC drives that can reduce the drive power by employing features that have different conditions depending on the operating state of the MC. The overall drive power is reduced by applying different excitation currents based on the operating state. The controller and system proposed in this study were simulated using Powersim 9.1 (PSIM), and the feasibility was verified by manufacturing an analog-type driver using LM2576 and a digital-type driver using an MCU. The simulation and experimental results provide significant data for verifying the high performance and reliability of the proposed controller and system.

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The Self-Correcting Control Strategy of a Single Flux Linkage Closed Loop for a Contactor

Tang¹,

Chen²,

Xu³

2022

IEEE Trans. Ind. Electron.

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Optimization design and energy-saving control strategy of high power dc contactor

Cited by 5 publications

References 24 publications

Risk Assessment of New Energy Vehicle Supply Chain Based on Variable Weight Theory and Cloud Model: A Case Study in China

Risk Assessment of New Energy Vehicle Supply Chain Based on Variable Weight Theory and Cloud Model: A Case Study in China

Two-Level Excitation Current Driver to Reduce the Driving Power of an Electromagnetic Contactor

The Self-Correcting Control Strategy of a Single Flux Linkage Closed Loop for a Contactor

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