A high-stability flat top pulse strong magnetic field generating device and control method

Abstract

The invention discloses a device for generating high-stability flat-top pulse strong magnetic field. The device comprises a battery pack, a magnet, a series resistor R0, a regulation bypass, a real-time controller and an observation current sensor CT0, in which the regulation bypass is composed of a regulation semiconductor Q, a transient suppression diode TVS, a monitoring current sensor CT and abypass diode Db. The positive pole of the battery pack is connected to one end of the magnet through the series resistor; one end of the magnet is connected to the positive end of the regulation bypass; the negative pole of the battery pack, the other end of the magnet and the negative end of the regulation bypass are connected to each other; the magnet input end of the real-time controller is connected to the output end of the observation current sensor, and the bypass output end of the real-time controller is connected to the control end of the regulation bypass; the observation current sensor is used to collect magnet current signals, and the real-time controller outputs control signals according to the change trend of the magnet current signals and controls the current in the regulation bypass to realize continuous adjustment of the magnet voltage, so that the magnet generates a ripple-free high-stability flat-top pulse strong magnetic field.

Description

technical field [0001] The invention belongs to the field of pulse power, and more specifically relates to a high-stability flat top pulse strong magnetic field generating device and a control method. Background technique [0002] With the rapid development of science and technology, pulsed strong magnetic field, as an extreme experimental environment, has become an indispensable research condition for basic frontier scientific research. Specific heat measurement, nuclear magnetic resonance and many other scientific experiments not only have high requirements on the strength of the magnetic field, but also have extremely high requirements on the stability of the magnetic field. For example, the stability of the magnetic field directly determines the signal-to-noise ratio of the nuclear magnetic resonance measurement signal. The magnetic field remains unchanged during the thermal relaxation time of the sample, so the stability and duration of the magnetic field are the key fa...

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Problems solved by technology

[0006] Aiming at the defects of the prior art, the object of the present invention is to provide a high-stability flat-top pulsed strong magnetic field device and control method, aiming to solve the problem of large magnetic field ripple in the current flat-top magnetic field generating device and generate high stability The flat-top magnetic field provides a suitable experimental environment for precision nuclear magnetic resonance experiments and specific heat measurement experiments

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