Research on Dynamic Characteristics of Circuit Breaker’s Closing Electromagnet Based on Co-simulation

doi:10.11985/2023.01.011

Abstract

Abstract:

The newly designed marine DC circuit breaker closing device must meet the requirements of small size, fast action, stable and reliable static maintenance. The design scheme of the closing device with the combined action of electromagnet and tripping frame is selected, and its action characteristics are studied. The mathematical equations of electromagnetic force and mechanical motion of the closing device are established; the finite element simulation model of the core component electromagnet is constructed, and the changes of electricity, magnetism, force, displacement and speed are simulated and analyzed; and this is used as input conditions, an ANSYS co-simulation model of the tripping frame with the lowest structural strength is established, and it is verified that the structural stress during the closing process is less than the Von Mises yield limit. The current and displacement data of the simulation and prototype experiments are compared and analyzed. The results show that when the power supply is AC 220 V 50 Hz full-wave rectification, the closing device can complete a 6 mm stroke within 19.6 ms, which verifies the correctness of the simulation results. The innovation of this paper is to design a set of small structure, simple and practical locking trip mechanical device, engineering application results show that its performance is reliable. The new scheme provides a reference for the design of marine DC circuit breaker closing device.

Key words: Electromagnet, finite element simulation, ANSYS simulation, structural stress, dynamic characteristics

CLC Number:

TM774

SUN Leiqiang, ZHUANG Jinwu, WANG Chong, SUN Yupeng, MA Wenjiao. Research on Dynamic Characteristics of Circuit Breaker’s Closing Electromagnet Based on Co-simulation[J]. Journal of Electrical Engineering, 2023, 18(1): 104-110.

Figures/Tables 11

References 21

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技术参数	数值
额定工作电压/V	DC180~220
线圈电阻/Ω	41
额定工作电流/A	2.5
线圈匝数	1 600
线径/mm	0.4