Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1982-06-14
1984-09-04
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
239102, 123494, 310325, H01L 4108
Patent
active
044699743
ABSTRACT:
An acoustic fuel injector-atomizer comprising a horn (74) actuated by piezoelectric crystals (28a, 28b) to form a resonant structure (18) excited by an oscillator signal. The oscillator (16) which generates the excitation signal is self-tuned to the resonant frequency of the structure (18) by means of a first transformer coupling (66, 56) which provides a feedback path between the structure (18) and the oscillator transistor (24) and a second transformer coupling (68, 56) which provides a compensation signal representing static capacitance of the crystals (28a, 28b). The compensation signal is subtracted from the feedback signal of the structure (18) so as to eliminate the static capacitance component as an error source in the self-tuning function.
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Budd Mark O.
Eaton Corporation
Grace C. H.
Lewis J. G.
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