公开(公告)号：US3842340A

公开(公告)日：1974-10-15

申请号：US1167470

申请日：1970-02-16

Applicant: PHILIPS CORP

Inventor： BRANDQUIST R

IPC: B05B17/06 ,  B06B1/02 ,  H02M7/00 ,  H01V7/00 ,  H02B9/00

CPC classification number: B06B1/0253 ,  B06B2201/71

Abstract: An ultrasonic generator with means for automatically adjusting the oscillation frequency to provide maximum power to the load. The generator includes a DC-AC converter operating into a resonant circuit that is coupled to the transducer. The converter includes first and second switching devices alternately switched by the frequency modulated output of a frequency controllable oscillator. The modulation frequency is derived across a resistor in the converter circuit and is compared with the modulation frequency in a phase detector to produce a control signal whose polarity is determined by the phase relationship of the compared signals. This control signal controls the oscillator to a frequency at which the transducer delivers maximum power to a load.

Abstract translation: 一种超声波发生器，具有用于自动调节振荡频率以为负载提供最大功率的装置。 发电机包括工作在耦合到换能器的谐振电路中的DC-AC转换器。 该转换器包括由频率可控振荡器的调频输出交替切换的第一和第二开关装置。 调制频率通过转换器电路中的电阻器导出，并与相位检测器中的调制频率进行比较，以产生其极性由比较信号的相位关系确定的控制信号。 该控制信号将振荡器控制到传感器向负载提供最大功率的频率。