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<p>Uniform magnetic fields are critical for advancing seed–soil interaction studies, yet existing spherical coil systems face challenges in field uniformity and energy efficiency. This study introduces an innovative spherical coil configuration, optimized through theoretical modeling and finite element simulations validated via Maxwell software, to generate highly uniform magnetic field. We employed advanced theoretical modeling combined with comprehensive finite element simulations, validated via Maxwell software, to optimize the spherical coil parameters for enhanced uniformity. Experimental results demonstrated that a three-plane perpendicular coil arrangement with 200&#xa0;mA current achieved a magnetic flux density of 30&#xa0;mT, improving spatial uniformity by over 300% compared to traditional Helmholtz coils. Physical experiments with a 200&#xa0;mm circular coil further confirmed the method’s efficacy, showing an induced voltage range of 0–4.6&#xa0;V. This work provides a foundational framework for precise magnetic field control in agricultural applications, bridging the gap between theoretical models and practical implementation.</p>

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Optimized spherical coil configurations for enhanced uniformity in seed–soil spatial magnetic field generation

  • 期刊论文

  • 发表日期：

    2025年8月26日

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  • Jingqing Yang,
  • Jin Xu

摘要

Uniform magnetic fields are critical for advancing seed–soil interaction studies, yet existing spherical coil systems face challenges in field uniformity and energy efficiency. This study introduces an innovative spherical coil configuration, optimized through theoretical modeling and finite element simulations validated via Maxwell software, to generate highly uniform magnetic field. We employed advanced theoretical modeling combined with comprehensive finite element simulations, validated via Maxwell software, to optimize the spherical coil parameters for enhanced uniformity. Experimental results demonstrated that a three-plane perpendicular coil arrangement with 200 mA current achieved a magnetic flux density of 30 mT, improving spatial uniformity by over 300% compared to traditional Helmholtz coils. Physical experiments with a 200 mm circular coil further confirmed the method’s efficacy, showing an induced voltage range of 0–4.6 V. This work provides a foundational framework for precise magnetic field control in agricultural applications, bridging the gap between theoretical models and practical implementation.