Drive system of actuator having piezoelectric device for use in

Details Drive system of actuator having piezoelectric device for use in Drive system of actuator having piezoelectric device for use in

1990-06-07

1991-05-07

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310328, H01L 4108

Patent

active

050139550

ABSTRACT:
A drive system of a piezo-type actuator for use in a motor vehicle, which piezo-type actuator is constructed with a piezoelectric device which is expandable and contractible in accordance with application of a voltage thereto. The drive system includes a voltage-increasing section for increasing an output voltage of a power source mounted on the motor vehicle so as to develop a drive voltage for the piezo-type actuator and a voltage-application section for applying to the piezoelectric device of the piezo-type actuator the drive voltage. Also included in the drive system is an abnormality detection section which is arranged so as to an abnormality of the drive voltage developed by the voltage-increasing section. A safety controller is responsive to an abnormality signal from the abnormality detection section for prohibiting the application of the drive voltage to the piezoelectric device thereof and further discharging charges accumulated in the piezoelectric device thereof when the abnormality detection section detects the abnormality of the developed drive voltage. With this arrangement, it is possible to prevent troubles due to the abnormality of the drive voltage to be applied to the piezoelectric device of the piezo-type actuator.

REFERENCES:
patent: 3573781 (1971-04-01), Shoh
patent: 3819961 (1974-06-01), Bourgeois et al.
patent: 3828773 (1974-08-01), Buch et al.
patent: 4888514 (1989-12-01), Takahashi et al.
patent: 4901034 (1990-02-01), Frank-Peter

Affiliated with

Also associated with

Rating

Drive system of actuator having piezoelectric device for use in does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Drive system of actuator having piezoelectric device for use in , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drive system of actuator having piezoelectric device for use in will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-941472