Abstract: An X-Y positioning machine has a forcer, with armature coils, that moves around on a platen, supported by an air bearing. Magnets embedded in the motor platen generate a fixed magnetic field with which the armature coils interact. Perpendicular elongated coils interact with the fields of magnets in columns and rows. When a traditional rectangular pattern of the magnets is provided, a packing density and average peak magnetic flux intercepted by the coils are limited to 50%. The present invention provides magnet configurations that provide greater than 50% maximum peak flux density and up to 100% packing density. Several magnet arrangements are provided: a first in which round magnets are used instead of square, and a second in which diamond shaped magnets are used. The latter can be used at 100% packing density arrangement. In addition to high peak flux density for a narrow coil, these embodiments exhibit low cogging forces. A method of making the magnet is also provided.

Abstract: A molten carbonate fuel battery comprises a stack of molten carbonate fuel cells. A half-cell anode and a half-cell cathode are disposed at the positive and negative ends which are defined by the end cathode and end anode, respectively, of the stack, with respective separators disposed therebetween. The half-cell anode includes an anode electrode and an anode reaction gas flow path, but does not include a matrix, and the half-cell cathode includes a cathode electrode and a cathode reaction gas flow path, but does not include a matrix.