Abstract
High energy density pulse pump power supply is an important part of a large laser fusion facility. When a short-circuit fault occurs, massive energy injection will cause the capacitor and switch to damage or even explode. Therefore, it is of great significance to set a series protection inductor. In this paper, the structure of the widely used solenoid inductor is optimized. The geometric mean distance principle is introduced, and Neumann’s formula is extended to calculate the inductance of the solenoid. The electromagnetic force on each turn is solved by the virtual displacement method. The analytical expression of the electromagnetic stress in the current-carrying solenoid is deduced by combining the force balance equation, constitutive equation and geometric constraint equation. The electromagnetic-structure coupling simulation verifies the accuracy of the expression. Based on the Taguchi method, the structure parameters of the solenoid are optimized. The results show that the solenoid’s wire radius and layer count are the two most important influencing factors. As the wire radius increases and the layer count increases, the maximum carrying energy per unit volume increases. The influence of insulation encapsulation on the stress distribution in the inductor is studied based on electromagnetic-structure coupling simulation. It can be known that insulation encapsulation can effectively reduce stress and restrain deformation. On this basis, a novel type of double-layer solenoid inductor is designed and processed. Several pulse discharge tests verify its large current-carrying capacity and high reliability. The above results are useful for structure design and application of the protection inductor.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call