Ultrasonic apparatus

Details Ultrasonic apparatus Ultrasonic apparatus

1996-10-23

1998-10-27

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310323, H01L 4108

Patent

active

058281568

ABSTRACT:
In an ultrasonic apparatus a plurality of piezoelectric electroacoustic transducers (10, 12) are mechanically coupled to a horn (14) for providing ultrasonic vibrations thereto, and the transducers are energized in parallel from a common electrical power supply (28). In order to avoid the presence of circulating currents among the transducers, transformer balancing units (30) are connected in circuit with each of the transducers. Since the use of parallel connected piezoelectric transducers increases the total circuit capacitance, series connected capacitors (32, 34) are provided to restore the circuit capacitance to a value required for the resonant circuit condition.

REFERENCES:
patent: 2891176 (1959-06-01), Branson
patent: 3113225 (1963-12-01), Kleesattel et al.
patent: 3315102 (1967-04-01), Quint et al.
patent: 3562041 (1971-02-01), Robertson
patent: 3839698 (1974-10-01), Ehrlich
patent: 4554477 (1985-11-01), Ratcliff
patent: 4651043 (1987-03-01), Harris et al.
patent: 4786356 (1988-11-01), Harris

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