Mathematical approach for designing &amp;amp; development of Helmholtz coil for hyperpolarized Xenon gas used in MRI

Rautela, Ranjana; Bhatt, V.; Sharma, Prem V.; Khushu, S.; Walia, Pushpinder

doi:10.1109/iicpe.2011.5728083

Cited by 8 publications

(1 citation statement)

References 4 publications

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“…The Helmholtz coil was first invented by the physicist Hermann von Helmholtz [21]. The Helmholtz coil is defined as two identical circular coils that have same diameter and equal number of turns, placed parallel to each other along a common axis through the center of the coils distanced by the radius of the coils [22].…”

Section: Helmholtz Coilmentioning

confidence: 99%

Extending the GMR Current Measurement Range with a Counteracting Magnetic Field

Poon

Tse

Lau

2013

Sensors

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Traditionally, current transformers are often used for current measurement in low voltage (LV) electrical networks. They have a large physical size and are not designed for use with power electronic circuits. Semiconductor-based current sensing devices such as the Hall sensor and Giant Magnetoresistive (GMR) sensor are advantageous in terms of small size, high sensitivity, wide frequency range, low power consumption, and relatively low cost. Nevertheless, the operational characteristics of these devices limit their current measurement range. In this paper, a design based on using counteracting magnetic field is introduced for extending the GMR current measurement range from 9 A (unipolar) to ±45 A. A prototype has been implemented to verify the design and the linear operation of the circuit is demonstrated by experimental results. A microcontroller unit (MCU) is used to provide an automatic scaling function to optimize the performance of the proposed current sensor.

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Section: Helmholtz Coilmentioning

confidence: 99%

Extending the GMR Current Measurement Range with a Counteracting Magnetic Field

Poon

Tse

Lau

2013

Sensors

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Optimal Design Method to Improve the Magnetic Field Distribution of Multiple Square Coil Systems

Huang

Jiang

et al. 2020

IEEE Access

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Power electronic equipment regulated by the International Thermonuclear Experimental Reactor (ITER) organization must be tested in a relevant steady-state magnetic field immunity test, and the test area is generally required to be a cube shape. For this reason, a multiple square coil system structure is used. In this paper, a Taylor expansion and an optimization program are used to determine the optimal parameters of a coil system with different groups. For a three-coil system, the effects of the conductor cross-section, conductor spacing, helical structure, and conductor connection on the magnetic field uniformity are analyzed. A clear understanding of the influence degree of the error helps design an actual coil system. ITER organization is currently conducting research on magnetic field generator for electronic devices in large scientific devices. The design method proposed in this paper can reduce the design difficulty and provide theoretical support. INDEX TERMS Error analysis, immunity test, magnetic field uniformity, multiple square coil systems.

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Development and design of helmholtz coil for NBTI degradation studies

Merah

Nadji

2017

2017 5th International Conference on Electrical Engineering - Boumerdes (ICEE-B)

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Mathematical approach for designing & development of Helmholtz coil for hyperpolarized Xenon gas used in MRI

Cited by 8 publications

References 4 publications

Extending the GMR Current Measurement Range with a Counteracting Magnetic Field

Extending the GMR Current Measurement Range with a Counteracting Magnetic Field

Optimal Design Method to Improve the Magnetic Field Distribution of Multiple Square Coil Systems

Development and design of helmholtz coil for NBTI degradation studies

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