Patent · US Active

Method for frequency control of a piezoelectric transformer and circuit arrangement comprising a piezoelectric transformer

US10638590B2 · kind B2 · utility

4Cited by

10References

13Claims

0Family size

Assignee

EPCOS AG · DE

Inventors

Michael Weilguni · Hagenberg, AT
Markus Puff · Graz, AT

Key dates

Filing date	Jul 8, 2016
Grant date	Apr 28, 2020
Priority date	—
Expiry date	Jul 8, 2036

Classification

Technology area (CPC H)Electricity
CPC primaryH05H1/2481
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method for frequency control of a piezoelectric transformer and a circuit arrangement including a piezoelectric transformer are disclosed. In an embodiment, the method includes exciting a piezoelectric transformer on an input side with an AC voltage of predetermined frequency as input voltage, capturing a phase information for an input impedance of the piezoelectric transformer in a feedback path, evaluating the captured phase information in respect of a predetermined phase criterion, and regulating the frequency of the AC voltage on a basis of the evaluated phase information.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.