Nairui Yin

Changshu Switch Manufacturing (China)

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Ruiliang Guan

Changshu Switch Manufacturing (China)

Hongwu Liu

Southwest Petroleum University

Zhu Tiansheng

Guangzhou Electronic Technology (China)

Hongwu Liu

Beihang University

Jia Shenli

Sichuan University

Degui Chen

Xi'an University of Science and Technology

Zongqian Shi

Xi'an Jiaotong University

Xinyi Xie

Karlsruhe Institute of Technology

HE Yan-feng

PowerChina (China)

Xie Xinyi

Cooperative Institutions

Changshu Switch Manufacturing (China)

Xi'an Jiaotong University

Sichuan University

Chinese Academy of Sciences

State Key Laboratory of Electrical Insulation and Power Equipment

Institute of Electrical Engineering

Beijing Institute of Aeronautical Materials

Yanshan University

Hebei University of Technology

Changzhou University

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The influence of magnetic and electric fields to the arc motion in low-voltage apparatus

IEICE Technical Report; IEICE Tech. Rep. (2013)

Hongwu Liu Ruiliang Guan Nairui Yin Weiwen Lu

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Citations (1)

Study on voltage characteristics of short air arc with high current density arc root

AIP Advances (2019)

Zhu Tiansheng Hongwu Liu Ruiliang Guan Shenli Jia Nairui Yin

In this paper, the voltage characteristics of short air arc with high average current density arc root were studied at atmospheric pressure. Cu-W electrodes with diameter of 5-14mm and gap length of 0.2-3 mm were used in the experimental study. The experimental current varies from 1,000A to 16,600 A. The average current density of the arc roots in the experiment was up to 245 A/mm2. In the scope of this study, the arc voltage is a function of the average current density of arc root when the electrode gap length is fixed. For same average current density of arc root, the arc voltage is approximately the same even if the experimental currents are different. And the arc voltage increases with the increment of the average current density of arc root. Theoretical analysis and experimental results show that the electrode fall voltage almost doesn’t change with the average current density of arc root. However the arc column voltage increases with the increment of the average current density of arc root.

Electric arc

10.1063/1.5100633

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Citations (5)

Experimental study on the behaviors of arc-root by using separate mesh electrodes (Electromechanical Devices : 国際セッション IS-EMD2014)

IEICE technical report. Speech (2014)

Hongwu Liu Nairui Yin Xinyi Xie Zhu Tiansheng Ruiliang Guan

Root (linguistics)

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Simulation and experiment on influence of wall ablation to pressure and power of the arc in low-voltage circuit breaker

Nairui Yin Ruiliang Guan Zongqian Shi Hongwu Liu Lijun Wang

By considering properties of the arc, heat and radioactive phenomena and air blow, a simplified simulation model is introduced to investigate relations of the pressure and arc power. Influence of different wall parameters such as shape and materials are considered in the simulation model. According to the simplified simulation model, the corresponding experiment model is established to measure the pressure and arc power in arc interrupting process with different wall parameters. By comparing relations of pressure and arc power, the experiment results verify the validity of the simulation model.

Electric arc

Pre-charge

10.1109/icepe-st.2015.7368327

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Citations (1)

Influence of the dissociation unit on pressure and temperature distribution in arc chamber of ACB during the breaking process

AIP Advances (2021)

Nairui Yin Hongwu Liu Zongqian Shi Ruiliang Guan

To void breakdown between busbars, the dissociation unit is applied in the arc chamber of an air circuit breaker (ACB) to cool down the hot gas exhausted from the vent of the arc chamber in the interrupting process. Cooling efficiency and flow resistance of the dissociation unit have important roles, which can greatly affect the safety of the low voltage switcher and interrupting performance of the arc chamber. The most common structure style of the dissociation unit is a multilayer metal wire mesh, and it has a complex microstructure. Then, it is unreasonable to directly simulate the dissociation unit due to the huge cost of calculation. In this study, the porous medium model is introduced and a combination of two different porous materials is applied to simplify the simulation model of the dissociation unit. Based on the porous model and simplified arc chamber model, the ACB with the dissociation unit is analyzed. The cooling effect and flow resistance of the dissociation unit are evaluated in the breaking process. By comparing experimental and simulated pressures in the arc chamber, this simulation approach is verified.

10.1063/5.0063631

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Citations (0)

Optimum design method of shunt release based on ansoft maxwell

Zhu Tiansheng Hongwu Liu Ruiliang Guan Jia Shenli Nairui Yin

This paper studied the optimization of the shunt release electromagnet based on Ansoft maxwell finite element simulation. The minimum size as the optimization target by taking into account the electromagnet force and temperature rise limit. In this study the electromagnetic force is calculated using finite element simulation, demand of temperature rise limit is satisfied by limiting the maximum current density. A random genetic algorithm is applied as optimization method.

Electromagnet

Limiting

Optimal design

10.1109/icepe-st.2017.8188953

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Citations (3)

A numerical model of mechanical, thermoelectric and magnetic coupling fields for stationary electric contact

Zhu Tiansheng Hongwu Liu Nairui Yin Ruiliang Guan Jia Shenli

The proposal of this paper is to establish a numerical model to simulate mechanical, thermal, electric and magnetic behavior of the electrical contact. The coupling model of mechanical, thermal, electrical and magnetic field is uncoupled into two sub models: structural thermoelectric and magnetic models. By using ANSYS software the direct-coupling of structural and thermoelectric fields is solved. The ANSOFT software is applied to compute the magnetic repulsion force. Finally the interpolation method is used to combine above sub models to compute the simulation results with considering effect of magnetic repulsion force.

Interpolation

10.1109/icepe-st.2013.6804347

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Citations (0)

Arc Splitting Process in Low-Voltage Device

IEICE Technical Report; IEICE Tech. Rep. (2012)

Hongwu Liu Ruiliang Guan Nairui Yin Xinyi Xie Degui Chen

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Influence of the Splitter Plates on the High Current Air Arc in Low Voltage Circuit Breaker

IEICE Transactions on Electronics (2013)

Hongwu Liu Ruiliang Guan Nairui Yin Xinyi Xie Degui Chen

The influence of the splitter plates on the high-current arc roots formation in low voltage circuit breaker is investigated. One arc quenching chamber model is designed, where the shape of the splitter plates can be changed. The capacitor bank circuit is used to provide the test power supply, and the effective value of the prospective short circuit current is fixed to 10kA. High speed CCD camera is adopted to record the arc images during the arcing duration. Arc current and voltage are also measured to analyze the arc characteristics. In addition, a simplified 1-D thermal-electric model is developed to investigate the influence of the splitter plates on the distribution of the current density of the arc plasma with the assumption of local thermal equilibrium (LTE). It shows that the distance between the arc initial ignition location and the splitter plates is crucial to the arc root formation.

Splitter

Electric arc

High Voltage

Plasma arc welding

Pre-charge

Splitter plate

10.1587/transele.e96.c.1119

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Citations (2)

Simulation study of influence of the outlet elastic baffle on pressure in arc chamber during the interrupting process of low-voltage circuit breaker

AIP Advances (2021)

Nairui Yin Hongwu Liu Zongqian Shi Ruiliang Guan

In this paper, a bidirectional fluid–solid interaction method is established to investigate the influence of the outlet elastic baffle on the pressure in the arc chamber in the breaking process of a low-voltage circuit breaker. Based on the computational fluid dynamic method, the flow model in the arc chamber is established. The model of the outlet baffle, with consideration of the nonlinear behavior, is established by the finite element method. By introducing dynamic grid technology, the interaction process of deformation of the outlet baffle and arc chamber pressure can be analyzed. A simple arc extinguishing chamber with an outlet baffle is designed, and experiments with a LC oscillating circuit are carried out. By using a high-speed camera and a pressure sensor, the deformation of the baffle and the pressure of the arc chamber are measured in the breaking process. The simulation model is verified by experimental results. It is worth noting that the flutter behavior of the elastic baffle was observed in the experiments and in the numerical simulation. Through simulation analysis, it is found that the flutter behavior is caused by the first-order mode of the elastic baffle under the excitation of arc chamber pressure.

Baffle

Chamber pressure

10.1063/5.0053161

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Citations (3)