Patent ID: 7019993
Filing Date: 2006-03-28
Classification: H01L,H02M

Abstract:
1. A modular power supply, comprising: a DC voltage source; a plurality of driver circuits for applying a DC voltage to a plurality of transformer, a plurality of laminated piezoelectric transformers, each of said piezoelectric transformers, comprising; a first input portion comprising a first electroactive layer having first and second opposing electroded major faces and first and second opposing minor faces and polarized such that upon application of voltage across said first and second opposing electroded major faces, said first electroactive layer deforms in a longitudinal direction parallel to said first and second opposing electroded major faces and perpendicular to said first and second opposing minor faces; a second input portion comprising a second electroactive layer having first and second opposing electroded major faces and first and second opposing minor faces and polarized such that upon application of voltage across said first and second opposing electroded major faces, said second electroactive layer deforms in a longitudinal direction parallel to said first and second opposing electroded major faces and perpendicular to said first and second opposing minor faces; an output electroactive layer having first and second opposing major faces, first and second opposing electroded minor faces, third and fourth opposing minor faces; a first dielectric layer having first and second opposing major faces; a second dielectric layer having first and second opposing major faces; wherein upon application of a voltage across said first and second electroded major faces of said first input electroactive layer, said first input portion deforms in said longitudinal direction; and wherein upon application of a voltage across said first and second electroded major faces of said second input electroactive layer, said second input portion deforms in said longitudinal direction; and wherein upon said longitudinal deformation of said first and second input portions, said first and second bonded dielectric layers and said output electroactive layer mechanically strain in said longitudinal direction; and wherein said mechanical strain of said output electroactive layer in said longitudinal direction piezoelectrically generates a first output voltage between said first electroded minor face and said central output electrode portion and a second output voltage between said second electroded minor face and said central output electrode portion; and wherein an output of each of said driver circuits is electrically connected to a transformer input terminal of each of said piezoelectric transformers; and a plurality of rectifiers, each of said rectifiers having a first and second rectifier input terminals and first and second output terminals;