Circuit arrangement with a piezoelectric transformer
First Claim
1. A circuit arrangement with a piezoelectric transformer having two electrodes arranged on the primary side of the transformer, characterized in that a DC voltage source is connected to the electrodes and in that a switching device is provided for interrupting the voltage supply of at least one electrode whose switching positions depend on the state of expansion of the primary side of the transformer.
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Accused Products
Abstract
The invention relates to a circuit arrangement with a piezoelectric transformer having two electrodes arranged on the primary side of the transformer and such a piezoelectric transformer itself. Piezoelectric transformers of this type are used, for example, for the power supply or control of lamps or electron tubes. For controlling such a piezoelectric transformer directly on the primary side by a most frequently available DC voltage, instead of an AC voltage as is customary, according to the invention a DC voltage source is connected to the electrodes and a switching device is provided for interrupting the supply of voltage to at least one electrode, the positions of the switching device being dependent on the state of expansion of the primary side of the transformer. The switching device is thus periodically closed and opened, the applied DC voltage is thus interrupted periodically.
9 Citations
6 Claims
- 1. A circuit arrangement with a piezoelectric transformer having two electrodes arranged on the primary side of the transformer, characterized in that a DC voltage source is connected to the electrodes and in that a switching device is provided for interrupting the voltage supply of at least one electrode whose switching positions depend on the state of expansion of the primary side of the transformer.
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5. A piezoelectric transformer having two electrodes arranged on the primary side of the transformer, characterized in that at least one electrode has a switching device or is itself arranged as a switching device having switching states which depend on the state of expansion of the primary side of the transformer.
Specification