公开(公告)号：KR1020070108261A

公开(公告)日：2007-11-08

申请号：KR1020077022048

申请日：2006-01-27

Applicant: 설프코 인크

Inventor： 메이제이슨 ,  리치맨찰스아이 ,  군네르만루돌프더블유

IPC: H03B5/40

CPC classification number: B06B1/0246 ,  B06B2201/58 ,  B06B2201/70

Abstract: The present invention is directed to a high-powered (e.g., > 500 W) ultrasonic generator for use especially for delivering high-power ultrasonic energy to a varying load including compressible fluids. The generator includes a variable frequency triangular waveform generator coupled with pulse width modulators. The output from the pulse width modulator is coupled with the gates of an Isolated Gate Bipolar Transistor (IGBT), which amplifies the signal and delivers it to a coil that is used to drive a magnetostrictive transducer. In one embodiment, high voltage of 0-600VDC is delivered across the collector and emitter of the IGBT after the signal is delivered. The output of the IGBT is a square waveform with a voltage of +/-600V. This voltage is sent to a coil wound around the ultrasonic transducer. The voltage creates a magnetic field on the transducer and the magnetorestrictive properties of the transducer cause the transducer to vibrate as a result of the magnetic field. The use of the IGBT as the amplifying device obviates the need for a Silicon Controlled Rectifier (SCR) circuit, which is typically used in low powered ultrasonic transducers, and which would get overheated and fail in such a high-powered and load-varying application.

Abstract translation: 本发明涉及一种用于特别用于将大功率超声能量递送到包括可压缩流体的变化载荷的大功率（例如> 500W）超声发生器。 发生器包括与脉宽调制器耦合的可变频三角波形发生器。 脉冲宽度调制器的输出与隔离栅双极晶体管（IGBT）的栅极耦合，隔离栅极双极晶体管（IGBT）放大信号并将其传送到用于驱动磁致伸缩换能器的线圈。 在一个实施例中，在信号传送之后，跨越IGBT的集电极和发射极输出0-600VDC的高电压。 IGBT的输出是+/- 600V电压的方波。 该电压被发送到围绕超声换能器缠绕的线圈。 电压在换能器上产生磁场，并且传感器的磁致伸缩特性导致换能器由于磁场而振动。 使用IGBT作为放大器件消除了对通常用于低功率超声换能器中的硅控制整流器（SCR）电路的需要，并且在这种大功率和负载变化的应用中将会过热和失效 。