Autonomous Magneto-Cumulative Energy Source Based on Permanent Magnets

Abstract

In the paper we describe a design of autonomous source of electromagnetic energy with initial field, created by permanent barium oxide magnets and present results of its tests. The energy source consists of magnetic system with initial energy of 1 J, helical magneto‐cumulative generator with helix diameter of 50 mm, amplifying the field energy in 130 times, and transforming unit for a load matching. At peak power on helical generator of 66 MW, the voltage of 16 kV was obtained at inductive load of 40 μH. Weight of the energy autonomous source is 5 kg, HE‐charge mass is 100 g. Several variants of magnetic systems were tested. Comparison of the magneto‐cumulative generator operation, powered from permanent magnets and powered from capacitor bank was carried out. Optimizing the magnetic system with numerical methods the authors managed to get almost identical distribution of the fields in the generators. Finally, the generator based on permanent magnets operates and provides similar output characteristics as the generator powered from the capacitor bank. In contrast to other magneto‐cumulative energy sources powered, for example, from an accumulator or piezo‐generator, this source, based on permanent magnets, has higher specific energy characteristics, does not require any switching elements and always ready for operation.