Converter with piezoceramic transformer
First Claim
1. A piezoceramic converter comprising a piezoceramic transformer, wherein the transformer includes square-shaped inner electrodes and outer electrodes interchangeably used for input/output electrodes, which are formed on both opposite surfaces of a square piezoplate, the inner electrodes are respectively separated from the outer electrodes by a gap of 0.3 to 3.0 mm, the piezoplate is polarized in thickness direction and excited in contour extension mode, and a side of the square is 10-50 mm and thickness of the transformer is 1-6 mm.
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Abstract
A piezoceramic converter for high power applications is built with a piezoceramic transformer and a pulse-synchronized electronic feedback circuit. The piezoceramic transformer is designed in the form of a square or circular piezo plate, polarized in thickness direction and excited in contour extensional mode in order to handle high power. A pulse-synchronized electronic feedback circuit is incorporated to stabilize output voltage and current under varying loading conditions. Frequency programming elements, a resistor and a capacitor are built into the control circuit to set an operating frequency of the piezoceramic transformer.
44 Citations
10 Claims
- 1. A piezoceramic converter comprising a piezoceramic transformer, wherein the transformer includes square-shaped inner electrodes and outer electrodes interchangeably used for input/output electrodes, which are formed on both opposite surfaces of a square piezoplate, the inner electrodes are respectively separated from the outer electrodes by a gap of 0.3 to 3.0 mm, the piezoplate is polarized in thickness direction and excited in contour extension mode, and a side of the square is 10-50 mm and thickness of the transformer is 1-6 mm.
- 5. A piezoceramic converter comprising a piezoceramic transformer, wherein the transformer includes circular-shaped inner electrodes and outer electrodes interchangeably used for input/output electrodes, which are formed on both opposite surfaces of a square piezoplate, the inner electrodes are respectively separated from the outer electrodes by a gap of 0.3 to 3.0 mm, the piezoplate is polarized in thickness direction and excited in contour extension mode, and a side of the square is 10-50 mm and thickness of the transformer is 1-6 mm.
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9. A piezoceramic converter comprising a piezoceramic transformer, wherein the transformer is in a shape of a square plate having two surfaces, of which one of both surfaces includes a square-shaped inner electrode formed in the middle of the plate and an outer electrode with a gap covering a remainder of the surface interchangeably used for input/output electrodes respectively and the other opposite surface is covered completely with an electrode used for a common electrode for the input/output electrodes, the piezoplate is polarized in the thickness direction and excited in contour extension mode, and a side of the square is 10-50 mm and thickness of the transformer is 1-6 mm.
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10. A piezoceramic converter comprising a piezoceramic transformer, wherein the transformer is in a shape of a square plate having two surfaces, of which one of both surfaces includes a circular-shaped inner electrode formed in the middle of the plate and an outer electrode with a gap covering a remainder of the surface interchangeably used for input/output electrodes respectively and the other opposite surface is covered completely with an electrode used for a common electrode for the input/output electrodes, the piezoplate is polarized in the thickness direction and excited in contour extension mode, and a side of the square is 10-50 mm and thickness of the transformer is 1-6 mm.
Specification