Abstract
Reliable power supply is of great significance to the stable operation of the online monitoring device. This paper studies a kind of electric energy collection power supply based on the principle of current mutual inductance. The iron core is made of nanocrystalline alloy with high permeability, and the relationship between the number of turns and the energy consumption power is analyzed by equivalent circuit. A discharge circuit is formed by connecting multiple diodes in series to avoid oversaturation of the iron core, and the residual voltage on the diode supplies the load electric energy. Combined with simulation and experiment, the number of turns and the number of diodes in series are optimized, so that the power supply has high efficiency and is not easy to be deeply saturated. The rectifier bridge and DC-DC voltage regulator module are used to stabilize the output voltage. The test shows that the power supply can support reliable energy extraction within the range of wire current of 17A at least and 1000A at most, and can be applied to lines of various voltage levels.
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