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Flat-top magnetic field generating device and method

A magnetic field generating device and flat-top technology, which is applied in the direction of electromagnetic circuit devices, circuit devices, battery circuit devices, etc., can solve the problem that cannot meet the requirements of long-pulse width, high-power, high-frequency gyrotron terahertz generators and high-field nuclear magnetic resonance devices. Need and other problems, to achieve the effect of simple structure, short discharge process, and change of circuit impedance

Active Publication Date: 2020-05-19
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0012] Aiming at the defects of the prior art, the present invention provides a flat-top magnetic field generating device and method, aiming to solve the problem that the prior art cannot meet the requirements of the long-pulse width and high-power high-frequency gyrotron terahertz generating device under the premise of using a normal temperature magnet. and the magnetic field of a high-field NMR setup requires

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  • Flat-top magnetic field generating device and method
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  • Flat-top magnetic field generating device and method

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[0046] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation examples described here are only used to explain the present invention, and are not intended to limit the present invention.

[0047] In this application, a normal temperature magnet is used to change the power supply voltage and line impedance at the same time, and to change the line impedance through negative feedback control, so that the current in the flat-top pulse magnetic field is stable, the flow waveform has good repeatability, high stability, and can generate long pulse widths that meet the requirements. High-frequency gyrotron terahertz generating device or high-field nuclear magnetic resonance device requires the magnetic field; at the same time, since the adjustment tube does not be...

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Abstract

The invention belongs to the technical field of strong magnetic fields, and discloses a flat-top magnetic field generating device and method. The device comprises a normal-temperature magnet, a charger, a trigger circuit, a capacitor branch, a current sensor, an adjusting branch, a driving protection circuit and a controller.The capacitor branch is used for supplying power to the normal-temperature magnet; the adjusting branch is used for being equivalent to a variable resistor in adischarging process and controlling acurrent by changing acircuit impedance; and the controller is used for calculating a charging voltage of the capacitor before discharging is started, making the charger charge the capacitor, and making switch triggering of the capacitor branch according to a pre-calculated time sequence in adischarging stage. Due to afact that the normal-temperature magnet is used, compared with a superconducting magnet and low-temperature magnet low-temperature pulse magnet scheme, construction cost and maintenance cost are low; and due to the fact that negative feedback control is formed by the current sensor, anadjusting branch, the controller, adriving circuit and the like, waveform repeatability is good, and accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of strong magnetic fields, and in particular relates to a flat-top magnetic field generating device and method. Background technique [0002] With the rapid development of science and technology, strong magnetic field, as an extreme physical environment, has become a necessary condition for many industrial engineering and basic frontier scientific research. And some fields not only require high magnetic field strength, but also high requirements for the stability of the magnetic field, such as gyrotron-type terahertz wave source, nuclear magnetic resonance device, specific heat measurement experiment, electromagnetic emission, etc. [0003] Terahertz waves refer to the electromagnetic spectrum region with a frequency between 100GHz and 10THz, and have broad application scenarios in space detection, radar, high-speed data communication, biomedical imaging, and space energy transmission. Among all the methods...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01F7/06
CPCH01F7/064H02J7/0013H02J7/0063H02J7/0068H02J7/345
Inventor 韩小涛王正磊张绍哲肖后秀谢剑峰
Owner HUAZHONG UNIV OF SCI & TECH
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