Other

C&d Technologies, Inc.

Rush Holdings, Inc.

Stanley E Dunn

Joseph M Cuschieri

An electromechanical machine is disclosed which has a field producing assembly providing a cup-shaped air gap which is circumferentially disposed about an axis of rotation. The field assembly produces a circumferential distribution of magnetic flux in the cup-shaped air gap having n periodic extremes of flux density about the axis. A cup-shaped electrical assembly or armature is disposed in the air gap and the armature and field assembly are relatively rotatable. The armature has a circular array of C non-overlapping coils on each of its inner and outer faces with the coils on one face being angularly offset from the coils on the other face. Moreover, since the air gap and coils are cup-shaped, it is possible to achieve, for a machine of given diameter and form factor, a horsepower and torque which was previously possible only with substantially larger disk-type motors. That is because the total volume of the air gap and coils correspond to those of a much larger diameter disk-type motor.

Machine with cup-shaped armature and air gap

The coils on the disc-type armature of an electro mechanical machine are all wound in the same direction (rotational sense). The coils on each face of the armature are formed into at least two series connected groups of coils which are disposed on the surface of the member so that each coil of one group is located between two coils from another group, and the two coils at one end of the interleaved groups are connected together. Power is commutated to the two coils at the opposite end of the groups of coils, so they conduct current in opposite directions

Electro mechanical machine and armature structure therefor

A sound absorbing hollow core panel of structural material based on Helmholtz resonator properties consisting of two exterior skins connected by spacers or structural connections and bounded by perimeter skins or structural connections with internal cavity or cavities that communicate with the exterior sound field through a plurality of orifices in one or both exterior skins as well as the perimeter of the panel and that have a plurality of Helmoltz resonators of different shapes and sizes tuned to specific frequencies that control the sound absorption characteristics of the hollow core panel. The internal cavity or cavities are defined by external skins and perimeters as well as internal structural elements acting as interior dividers, interior sub-volumes and perimeter structures, each of which may contain a plurality of orifices for sound communication forming a sequence of first order Helmholtz acoustical resonators with respective natural frequencies for sound absorption. Panels may be assembled with or without selected interior elements or perimeter structures as a basis for infinite flexibility in building sound absorbing walls of selectable sound absorbing characteristics and size. The numbers and geometries of the orifices as well as the sizes of the internal cavities may be varied generally, thus adding to the flexibility of the invention. Sound dissipating material may also be incorporated in the cavities of the panel.

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Boca Raton, FL, United States of America

Stanley E Dunn