Research on Electromagnetic Torque Calculation Model of Polarized Magnetic System and Its Application

doi:10.16628/j.cnki.2095-8188.2022.08.001

Abstract

Abstract:

Polarized magnetic systems are widely used in satellite and rocket electromagnetic relays due to their small size,light weight and low power consumption.At present,the parameter optimization of polarized magnetic system is mostly based on the experience and simulation results.The optimization cycle is quite long without theoretical basis.Firstly,the unified computation model for the electromagnetic torque of polarized magnetic system is established according to the equivalent magnetic circuit.The characteristics of electromagnetic torque curve under zero volt are analyzed.The relationship between the cross-sectional area of permanent magnet and the electromagnetic torque at 0 V release position and pick-up position is obtained.The adjusting method for the zero crossing position of electromagnetic torque curve under zero volt is achieved.Finally,the bridge polarized magnetic system is optimized by the above analysis results.Simulation and prototype test results show that the optimized structures can meet the respective optimization targets.The research can provide the theoretical basis and optimization direction for the parameter optimization and reliability improvement of the relay electromagnetic system.

Key words: polarized magnetic system, electromagnetic torque, magnetic circuit, optimization

CLC Number:

TM581

LIANG Huimin, LIU Guilin, CHEN Junfeng, WEI Zhen, HUANG Manyun. Research on Electromagnetic Torque Calculation Model of Polarized Magnetic System and Its Application[J]. LOW VOLTAGE APPARATUS, 2022, 0(8): 1-7.

Figures/Tables 15

References 20

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项目	原方案	优化方案
永磁体积V_m/mm³	15.30	15.21
永磁长度l_m/mm	8.5	6.5
永磁宽度b_m/mm	3.0	3.0
永磁高度h_m/mm	0.60	0.78
0 V释放位置处吸力矩/(mm)	-1.098 9	-1.319 6

原方案轭铁极面长度/mm	优化方案轭铁极面长度/mm
原方案轭铁极面长度/mm	左轭铁	右轭铁
2.5	3.8	2.5