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How do make a simple ultrasonic generator?

Date: 2022-11-03Number: 257

Ultrasonic wave mainly uses piezoelectric ceramics, all sizes are possible -LRB-special specifications need to be customized) is the power and volume-related below 60C ° c should be no problem power supply should be designed according to the shape of the piezoelectric ceramic plate is the transducer, a corresponding mechanical wave ultrasonic generator is formed by adding a fixed frequency AC.

Its purpose is to convert the local electricity (220V or 380V, 50 or 60Hz) into a high frequency AC signal that matches the Ultrasonic transducer. Linear amplifier and switching power supply can be used in the amplifier circuit, and switching power supply is usually used in the high-power ultrasonic power supply.

The basic principle of the generator is that the signal generator first forms a signal of a specified frequency, which can be a sine signal or a pulse signal, and the specified frequency is the frequency of the transducer, the frequency of ultrasonic wave used in ultrasonic equipment is 20 khz, 25 khz, 28 khz, 33 khz, 40 khz, 60 khz.

Expanding basic information:

In the process of ultrasonic operation, the change of temperature, rigidity, static load, machining area, tool damage and other factors of the vibration system make the natural frequency of the system drift, this requires that the ultrasonic generator has the function of automatic frequency tracking, and at the same time, to ensure the quality of the processing and protect the ultrasonic system, the generator has the function of adjusting the output power according to the load.

In industrial Ultrasonic transducer, even though frequency tracking is excellent, the change of the AC voltage supplied by the ultrasonic generator, the instantaneous change of the ultrasonic wave from no load to load from a few tens of Watts to a few kilowatts in a few milliseconds, this causes the amplitude and power of the Ultrasonic transducer to change, and the transducer fails to operate efficiently, causing the products produced by the ultrasonic process to be out of sync, a problem often encountered in ultrasonic equipment.