Simulation of closed-loop feedback TMR current sensor

Shaobo Liu; Wenting Li; Zhaozhi Long; Wenxing Peng; Jiawei Fan; Kangmin Hu

doi:10.1117/12.2674036

9 March 2023 Simulation of closed-loop feedback TMR current sensor

Shaobo Liu, Wenting Li, Zhaozhi Long, Wenxing Peng, Jiawei Fan, Kangmin Hu

Proceedings Volume 12600, International Conference on Optoelectronic Materials and Devices (ICOMD 2022); 126001G (2023) https://doi.org/10.1117/12.2674036
Event: 2022 International Conference on Optoelectronic Materials and Devices, 2022, Chongqing, China

Abstract

Due to its excellent frequency characteristics, TMR current sensors have been widely used in current state monitoring of power systems. In order to improve the measurement performance of TMR current sensors, they are usually designed as closed-loop feedback structures. Shielding enclosures were also added to TMR current sensors to improve their antiinterference capability. This paper analysed the design parameters of the feedback coil and the shielding enclosures. The influence of position of feedback coils on TMR current sensor was also analysed. When the TMR current sensor is equipped with two layers of shielding, the influence of the size and relative distance of the two layers of shielding on the shielding effect of the TMR current sensor has been analysed. The simulation results show that the position of the feedback coil has little difference in the feedback effect of the TMR current sensor, and the anti-interference ability of the TMR current sensor can be significantly improved with a shielding layer. When the TMR current sensor has two shielding layers, the thickness of the shielding layer should be reduced as much as possible, and the distance between the two shielding layers should be appropriately extended.

Citation Download Citation

Shaobo Liu, Wenting Li, Zhaozhi Long, Wenxing Peng, Jiawei Fan, and Kangmin Hu "Simulation of closed-loop feedback TMR current sensor", Proc. SPIE 12600, International Conference on Optoelectronic Materials and Devices (ICOMD 2022), 126001G (9 March 2023); https://doi.org/10.1117/12.2674036

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KEYWORDS

Magnetism

Sensors

Design and modelling

3D modeling

Computer simulations

Device simulation

Feedback loops

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