公开(公告)号：US3694713A

公开(公告)日：1972-09-26

申请号：US3694713D

申请日：1970-03-06

Applicant: AMLAB AB

Inventor： DUREN LENNART AXEL ,  ANDERSSON ARNE

IPC: B06B1/02 ,  H02B9/00

CPC classification number: B06B1/0253 ,  B06B2201/55 ,  B06B2201/58 ,  B06B2201/76

Abstract: An ultrasonic generator including an amplifier coupled in oscillator configuration for initiating via an exciting impedance ultrasonic vibrations in an electro-acoustic element such as that associated with a dental instrument. Connected in parallel with the exciting impedance in an additional impedance to form a tuned parallel resonance circuit. Maximum current is supplied to the exciting impedance through the amplifier and the primary winding of a current transformer also having a secondary winding connected in series with a capacitor to form a tuned series resonance circuit additionally emphasizing the maximum current. The transformer forms an inductive coupling in phase-aiding relationship between the output circuit of the amplifier and the control electrode thereof for continuously maintaining optimal effect at the prevailing resonance frequency with an automatic adaptation of the oscillation frequency to variations from the nominal mechanical resonance frequency of the electro-acoustic element.

Abstract translation: 一种超声波发生器，包括以振荡器配置耦合的放大器，用于通过诸如与牙科仪器相关联的电声元件中的激发阻抗超声波振动来启动。 与一个附加阻抗的激励阻抗并联连接，形成调谐的并联谐振电路。 通过放大器和电流互感器的初级绕组提供最大电流，该电流互感器还具有与电容器串联连接的次级绕组，以形成另外强调最大电流的调谐串联谐振电路。 变压器在放大器的输出电路与其控制电极之间形成一个电感耦合，用于在主要谐振频率下连续保持最佳效应，并将振荡频率自动调整为与标称机械谐振频率 电声元件。