Circuit and method for generating flat-topped pulsed magnetic field

Abstract

The invention discloses a circuit and a method for generating a flat-topped pulsed magnetic field, and belongs to the technical field of high-intensity magnetic fields. The circuit comprises a main loop and a magnetic control loop. The main loop comprises a first capacitor, a first switch, a double-winding magnetically controlled reactor and a pulse magnet which are sequentially connected in series. The double-winding magnetically controlled reactor in the main loop comprises a first winding and a second winding which are connected in series, and the first winding and the second winding are the same in number of turns and opposite in winding direction. The magnetic control loop comprises a second capacitor, a second switch and an electric reactor which are sequentially connected in series and is connected to the two ends of a second winding of the magnetic control electric reactor. The main loop further comprises a follow current loop connected to the two ends of the first capacitor in parallel. The follow current loop comprises a resistor and a one-way conduction element which are connected to the two ends of the first capacitor. The flat-topped pulsed magnetic field is generated by regulating and controlling the inductance of the double-winding magnetically controlled reactor, and the flat-topped pulsed magnetic field generating device has the characteristics of simple circuit structure, reliable control, low manufacturing cost, high field intensity of the generated flat-topped pulsed magnetic field, good stability and the like.

Description

technical field [0001] The invention belongs to the field of strong magnetic field technology, and more specifically relates to a circuit and method for generating a flat-top pulsed magnetic field. Background technique [0002] Strong magnetic field has become one of the more and more important experimental conditions in modern scientific research. In scientific experiments such as specific heat measurement, nuclear magnetic resonance, and high-power terahertz sources, not only the field strength of the pulsed magnetic field must meet the requirements of the experiment, but also the configuration and stability of the pulsed magnetic field must meet certain conditions. Therefore, the concept of flat-top pulsed strong magnetic field was proposed and gradually applied widely. [0003] The flat-top pulsed magnetic field can be realized by various methods, among which the more common one is to use a pulse forming network (PFN) to obtain a flat-top pulsed magnetic field. In a fi...

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Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a circuit and method for generating a flat-top pulsed magnetic field, the purpose of which is to generate a flat-top pulsed magnetic field with higher field strength and higher stability at a lower cost , to solve the problem that the existing flat-top pulsed magnetic field generation scheme cannot simultaneously generate high field strength and high stability flat-top pulsed magnetic field

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