Piezolectric-element drive apparatus

Details Piezolectric-element drive apparatus Piezolectric-element drive apparatus

1994-08-30

1996-08-06

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310317, H01L 4108

Patent

active

055436790

ABSTRACT:
A piezoelectric-element drive apparatus includes a direct-current power supply. An energy storing capacitor is connected in parallel with the direct-current power supply. An energy-transfer switching element becomes on when energy is transferred from the energy storing capacitor. A piezoelectric element connected in parallel with the energy storing capacitor receives energy and expands when the energy-transfer switching element becomes on. A discharging coil is connected in parallel with the piezoelectric element. A discharging switching element is operative for discharging the piezoelectric element via the discharging coil. A coupling transformer is provided between the energy storing capacitor and the piezoelectric element.

REFERENCES:
patent: 4644212 (1987-02-01), Moritugu et al.
patent: 4732129 (1988-03-01), Takigawa et al.
patent: 4749897 (1988-06-01), Natsume et al.
patent: 4767959 (1988-08-01), Sakakibara et al.
patent: 5036263 (1991-07-01), Yamada et al.
patent: 5057734 (1991-10-01), Tsuzuki et al.
patent: 5204576 (1993-04-01), Mitsuyasu

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