Ozone Technologies Ltd

Tip Top Tips Sàrl

Daniel Baour

Denis Klopfenstein

James Fowler

The generator for a piezoelectric motor is also suitable for powering a high power LED for a dental polymerisation lamp via a rectifier, and comprises two transformers each including a primary winding and a secondary winding and four switches controlled by an ultrasonic reference oscillator, two switches being arranged to alternately connect the secondary windings of the two transformers to the piezoelectric load, and the other two switches being arranged to alternately connect the two primary windings to a voltage supply so that during the positive alternation, the primary winding of one of the transformers is charged with energy whereas the secondary winding of the other transformer is discharged into the piezoelectric load, and so that during the negative alternation, the secondary winding of the first transformer discharges the energy thereof whereas the primary winding of the first transformer is charged.

Generator suitable for powering a dental curing light

The generator for a piezoelectric transducer, in particular for a piezoelectric motor for medical or dental applications, comprising two transformers (A,B) each including a primary winding (L) and a secondary winding (L), and four switches (A,B,A,B) driven by an ultrasonic frequency oscillator, two of said four switches (A,B) being designed to connect alternately the secondary of each transformer to the piezoelectric load (), and the two other switches (A,B) being designed to connect alternately the two primary windings to a power supply () so that during a first half cycle, called 'the positive half cycle' the primary winding of one of said two transformers is charged with power, while the secondary winding of the other transformer discharges power to the piezoelectric load, and so that during a second half cycle, called 'the negative half cycle' the secondary winding of said one transformer discharges power to the piezoelectric load, while the primary winding of the other transformer is charged with power.

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Rolle, Switzerland

Daniel Baour