Circuitry for supplying a load with an output current

US7745970B2 · kind B2 · utility

Assignees

• Infineon Technologies AG · DE
• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Matthias Radecker · Duisburg, DE
• Michael Lenz · Zorneding, DE

Key dates

• Filing date: May 18, 2006
• Grant date: Jun 29, 2010
• Expiry date: Feb 24, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H05B45/42
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A circuitry comprises a converter means for generating an alternating current signal from an energy from an energy source, a piezo transformer with an input and an output, wherein the input of the piezo transformer is electrically coupled to the converter means, to receive the alternating current signal as an excitation on the input side from the converter means, and wherein the output of the piezo transformer is designed to provide an output current, and a load, which is coupled to the output of the piezo transformer, so that output current flows through the same. The load is designed to convert at least part of the electrical energy supplied by the output current flowing through the load into another form of energy. The load is further designed such that a useful power provided in the form of useful energy is substantially proportional to the output current. The circuitry is designed to adjust the output current to a predetermined value.The described circuitry allows the supply of a load with particularly high efficiency, low interference emission and good regulation characteristics.