Epcos Ag

Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Osram Gesellschaft MIT Beschrankter Haftung

Igor Kartashev

Heinz Florian

Wolfgang Vogl

Christian Hoffmann

Patrick Schmidt-Winkel

Markus Puff

Reinhard Gabl

Alexander Glazunov

Arnulf Rupp

Wolfgang Athenstaedt

Peter Kraxner

Klaus Reichmann

Thomas Hanisch

A piezoelectric multi-layer component includes a piezoelectric main body, which has an inlet area and an outlet area. In the outlet area or in the inlet area at least two adjacent layers are polarized antiparallel to each other and at least two adjacent layers are polarized parallel to each other.

Piezoelectric multi-layer component

A piezoelectric component comprises a parallelepipedal basic body made of piezoelectric material which has an input region and an output region at opposite longitudinal ends of the basic body. Furthermore, the piezoelectric component comprises first and second primary electrodes which are arranged inside the input region and first and second secondary electrodes which are arranged inside the output region. The primary electrodes are at a greater interval from longitudinal lateral faces of the basic body in a subregion which faces the output region than in the subregion which is remote from the output region. Likewise, the secondary electrodes are at a greater interval from the longitudinal lateral faces of the basic body in a subregion which faces the input region than in a subregion which is remote from the input region.

Piezoelectric component

A method of producing an electrical component includes forming a stack of ceramic green films, where the stack has a hole that is accessible from external to the stack, inserting a cover into the hole, and sintering the stack together with the cover. The method may also include boring the hole through the stack of ceramic green films.

Electric functional unit and method for the production thereof

A piezoelectric transformer with a body that includes a first functional part and a second functional part is disclosed. The second functional part has inner electrodes, located in the body, which are connected to outer electrodes of this part. The first outer electrode of the first functional part is arranged parallel to the inner electrodes of the second functional part, wherein the minimum distance between the first outer electrode of the first functional part and the respective outer electrodes of the second functional part is selected greater than the distance between the first outer electrode of the first functional part and a terminal inner electrode of the second functional part facing it.

Piezoelectric transformer

A transformer arrangement with a piezoelectric transformer and a carrier will be disclosed. The transformer has a body in the form of a board. The transformer operates with thickness mode vibrations. The body is rigidly connected to the carrier in at least one peripheral region in which anti-nodes of a horizontal oscillation of the body appear.

Transformer arrangement with a piezoelectric transformer

A multiple-layer component includes at least two metal layers, at least one dielectric layer among the at least two metal layers, and a contact element that includes a porous body that electrically connects the at least two metal layers. The at least one dielectric layer includes dielectric layers made from ceramic material that are sintered.

An electrical component includes a body made from a stack of ceramic layers. The body has a cavity that is accessible external to the body. The cavity is defined by a wall. A contact surface is on the wall. A contact device is electrically connected to the contact surface. At least part of the contact device is external to the body. The contact device includes a connection part and a spring. The spring is between the body and the connection part. The spring is for exerting a spring force on the contact surface.

Electrical component and method for the production thereof

A piezoelectric transformer includes a base body. The base body includes an input part and an output part mechanically connected to the input part. The base body also includes internal electrodes perpendicular to a polarization axis of the transformer-in the input part and the output part. The transformer also includes an auxiliary electrode galvanically separated from the input part and the output part.

Piezoelectric transformer and method for the production thereof

A piezoelectric transformer with a base body is specified that has an input part and an output part, wherein at least three groups of internal electrodes are contained in at least one of these parts. The internal electrodes of each group are interconnected in an electrically conductive way. In this way, the internal electrodes of one group are electrically isolated from the internal electrodes of the other groups.

The following circuit is proposed for discharge lamps having a particularly high starting voltage. An a.c. voltage generator () provides a corresponding a.c. voltage. A starting voltage generating device, which comprises a piezo transformer (), is connected to the a.c. voltage generator () and can be connected at its output to a discharge lamp (), generates a starting voltage from the a.c. voltage. The starting voltage generating device in this case comprises at least one diode () which is connected in parallel with the output of the starting voltage generating device. A zero-order pump circuit is thus integrated in the starting circuit. Advantageous here is the use of higher-order pump circuits.

Growing community of inventors

Deutschlandsberg, Austria

Igor Kartashev