Driving device for piezoelectric element

Details Driving device for piezoelectric element Driving device for piezoelectric element

1987-03-11

1988-06-07

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310328, 123478, 123498, H01L 4108

Patent

active

047498978

ABSTRACT:
A driving device for a piezoelectric element for electrically driving a piezoelectric element to obtain a predetermined mechanical displacement, the piezoelectric element driving device being provided with a transformer having a primary winding and a secondary winding, the secondary winding being connected to the piezoelectric element; a switching element connected to the primary winding and controlling the amount of energy stored in an air-gap of the core of the transformer; and an energy control means for driving the switching element so that the amount of energy stored in the air-gap of the core of the transformer becomes a set value, the displacement of the piezoelectric element being controlled by the amount of energy stored in the air-gap of the core of the transformer.

REFERENCES:
patent: 3980906 (1976-09-01), Koris et al.
patent: 4109174 (1978-08-01), Hodgson
patent: 4161670 (1979-07-01), Kern
patent: 4318062 (1982-03-01), Mitsu et al.
patent: 4338576 (1982-07-01), Takahashi
patent: 4499878 (1985-02-01), Igashira et al.
patent: 4554477 (1985-11-01), Ratcliff
patent: 4560998 (1985-12-01), Wimmer
patent: 4595854 (1986-06-01), Yano et al.
patent: 4644212 (1987-02-01), Moritogu et al.

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