Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1991-06-05
1993-05-04
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310316, H01L 4108
Patent
active
052085058
ABSTRACT:
A piezoelectric element drive device comprising a power condenser for charging the piezoelectric element. The discharging circuit for the piezoelectric element comprises a first discharging circuit having a discharging coil therein and connected to the ground, and a second discharging circuit having a discharging coil and connected to the power condenser. When the discharging operation of the piezoelectric element is started, the piezoelectric element is initially discharged to the ground via the first discharging circuit, and then the piezoelectric element is discharged to the power condenser via the second discharging circuit, to charge the power condenser.
REFERENCES:
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patent: 4688536 (1987-08-01), Mitsuyasu et al.
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patent: 4767959 (1988-08-01), Sakakibara et al.
patent: 4947074 (1990-08-01), Suzuki
patent: 4966119 (1990-10-01), Mitsuyasu et al.
patent: 5036263 (1991-07-01), Yamada et al.
patent: 5053668 (1991-10-01), Mitsuyasu
patent: 5057734 (1991-10-01), Tsuzuki et al.
Copending U.S. Application No. 295296 (filing date: Jan. 10, 1989).
Copending U.S. Application No. 461236 (filing date: Jan. 5, 1990).
Budd Mark O.
Dougherty Thomas M.
Toyota Jidosha & Kabushiki Kaisha
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