Abstract: A magnetic heater is provided having a conductive member and a first magnet assembly comprising a frame and at least one magnet disposed a distance adjacent the conductive member, wherein the first magnet assembly and the first frame are adapted to rotate relative to each other about an axis so as to induce eddy currents in the conductive member when relative motion is produced between the conductive member and the first magnet assembly, the at least one magnet adapted to move relative to the frame in dependence on the change in the rate of rotation of the frame. The magnetic heater is provided with a passive relative-positioning actuator adapted to move one or more magnets in an axial direction and a radial direction relative to the frame. Such movement is exploited to control the magnetic field strength at the conductive member by controlling, among other things, the conductor/magnet spacing.

Abstract: A magnetic heater is provided having a conductive member and a first magnet assembly comprising a frame and at least one magnet disposed a distance adjacent the conductive member, wherein the first magnet assembly and the first frame are adapted to rotate relative to each other about an axis so as to induce eddy currents in the conductive member when relative motion is produced between the conductive member and the first magnet assembly, the at least one magnet adapted to move relative to the frame in dependence on the change in the rate of rotation of the frame. The magnetic heater is provided with a passive relative-positioning actuator adapted to move one or more magnets in an axial direction and a radial direction relative to the frame. Such movement is exploited to control the magnetic field strength at the conductive member by controlling, among other things, the conductor/magnet spacing.

Abstract: An apparatus and method for generating heat, in particular for heating a fluid. The apparatus includes a frame, with at least one permanent magnet fixedly mounted to the frame. An electrically conductive member is disposed proximate the permanent magnets. The magnetic field of the magnets upon the conductive member is made to vary cyclically. Typically either the permanent magnets, the conductive member, or both are movable with respect to one another. Relative motion of the conductive member and the magnets causes the magnetic field experienced by the conductive member to vary, which causes it to become hot. The total heat energy generated in the conductive member may exceed the total energy applied to the apparatus to produce the varying magnetic field. The apparatus may include a fluid path proximate the conductive member. Fluid in the fluid path receives heat from the conductive member.