Extracting Energy from an External Magnetic Field

TL;DR

This paper presents a theoretical device that extracts energy from an external magnetic field by exploiting electromagnetic angular momentum and conservation laws, with explicit solutions to Maxwell's equations.

Contribution

It introduces a novel theoretical model of a rotating magnetic insulator device that converts magnetic field energy into mechanical energy, clarifying controversial aspects in the literature.

Findings

Device increases angular velocity when εμ>1

Explicit Maxwell equations solutions for rotating insulators

Conservation laws are rigorously satisfied

Abstract

In this paper we describe the theory of a device that is able to extract energy from an external magnetic field. The device is a cylindrical magnetic insulator that once put in rotation makes electromagnetic angular momentum to be stored in the electromagnetic field in contrary direction to the mechanical angular momentum of the device. As a consequence due to total angular momentum conservation the device increases its angular velocity (when {\epsilon}{\mu}>1) Natural units are used in the paper and all conservation laws are rigorously satisfied. The voltage generated by the device is found solving explicitly Maxwell equations for rotating magnetic insulators in external fields, a subject that have provoked lots of polemics in the literature and which we hope to be here clarified due to our pedagogical presentation.