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US 2019/0198746 A1Published application
Control Circuit and Method for Controlling a Piezoelectric Transformer
AssigneeEpcos AG
InventorMichael Weilguni
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Abstract
A control circuit and a method for controlling a piezoelectric transformer are disclosed. In an embodiment the control circuit includes an inductor and a control unit, wherein the control circuit is configured to apply a voltage with a periodic waveform to a piezoelectric transformer, wherein a period duration of the voltage is specified by a control frequency and adjust the control frequency of the applied voltage as a function of an average current intensity of a current flowing through the inductor.
Claims17
1-14. (canceled)
A control circuit comprising:
- an inductor;
- and
- a control unit,
- wherein the control circuit is configured to:
- apply a voltage with a periodic waveform to a piezoelectric transformer, wherein a period duration of the voltage is specified by a control frequency;
- and
- adjust the control frequency of the applied voltage as a function of an average current intensity of a current flowing through the inductor.
4 more elements
A method for controlling a piezoelectric transformer, the method comprising:
- applying, by a control circuit, a voltage with a periodic waveform to the piezoelectric transformer, wherein a period duration of the periodic waveform is specified by a control frequency, and wherein the control circuit comprises an inductor,
- measuring, by the control circuit, an average current intensity of a current flowing through the inductor, and
- regulating, by the control circuit, the control frequency as a function of the measured average current intensity.
Dependencies are inferred from the claim text.