Patent ID: 7755235
Filing Date: 2010-07-13
Classification: E21B

Abstract:
1. A generator for use in explosive atmospheres, comprising: an intrinsically safe enclosure providing for the safe operation of electrical instrumentation in an explosive atmosphere; a magnetic core having an exposed part external to the intrinsically safe enclosure and a protected part internal to the intrinsically safe enclosure, and arranged such that magnetic fields will couple between them over a separation gap necessitated by a portion of the intrinsically safe enclosure; an input rotor for being driven by a source of mechanical energy external to the intrinsically safe enclosure; a number of permanent magnets mounted to be spun in orbits around said exposed part of the magnetic core by the input rotor; and a winding disposed around said protected part of the magnetic core, and for producing electrical power induced from magnetic fields created by the number of permanent magnets when spinning.