Piezoelectric transformer

Details Piezoelectric transformer Piezoelectric transformer

H - Electricity

03

H

H03H 9/15 (2006.01) H01F 29/00 (2006.01) H01L 41/107 (2006.01)

Patent

CA 2244765

The transformer (1) includes a body (2) made of piezoelectric material having an outer lateral surface (E) in the shape of a circular cylinder. Primary electrodes (5, 7, 10, 12, 17, 19, 22, 24) are arranged on the body (2) so that, when the primary voltage (Up) which is applied thereto has a determined frequency (fr), the outer lateral surface (E) alternately takes the shape of a first and a second elliptical cylinder, the major axes of these latter being perpendicular to each other and perpendicular to the axis (A) of the circular cylinder. This vibration mode of the body (2) has a lower fundamental resonance frequency than that of the vibration mode of known transformer bodies having the same space requirement. The transformer (1) is thus well suited to being used in devices where the available space is limited for providing a relatively high AC voltage but having a relatively low frequency.

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