Knowledge | 2022-08-29
What is an ultrasonic generator? This article takes you to understand the ultrasonic generator
With the rapid development of science and Technology, new things are emerging every day, and in all fields, for people to serve. I think you are familiar with the term ultrasonic cleaning machine, so do you know what is an ultrasonic generator?
An ultrasonic generator is an important part of an ultrasonic cleaning machine, its quality and matching degree directly determine the cleaning effect of the cleaning machine. The role of ultrasonic generator: ultrasonic generator, usually called an ultrasonic box, ultrasonic source, or ultrasonic power supply. Its purpose is to convert our electricity (220V or 380V, 50 or 60Hz) into high-frequency AC signals that match the Ultrasonic transducer. Linear amplifier and switching power supply can be used in the amplifier circuit, and switching power supply is generally used in the high-power ultrasonic power supply. The linear power supply also has its unique scope of application, its advantage is that it can not strictly require circuit matching, allowing continuous and rapid changes in operating frequency. From the current situation of the ultrasonic industry, ultrasonic is mainly divided into the self-excited and it-excited power supply.
Ultrasonic generator basic principle:
The principle is that the signal generator generates a signal of a specific frequency, which can be either a sine wave or a pulse, and the ultrasonic generator sets the frequency of the signal to a certain value. This specific frequency is the frequency of the transducer, generally used in ultrasonic equipment ultrasonic frequency of 20 kHz, 28 kHz, 40 kHz, and 60 kHz. Power amplifiers can take many forms, such as tube class A amplifiers. A Class B amplifier. Transistor Class A or Class B amplifiers (both analog): transistor switching amplifiers, in general, the frequency signals generated by the signal generator from 50W to 3000W of power are matched by the impedance of the power amplifier so that the impedance of the output is by that of the transducer, push the transducer to convert electrical signals into mechanical vibrations. The more perfect ultrasonic generator should also have a feedback link, mainly to provide two aspects of the feedback signal: one is to provide an output power signal, so we know when the generator power supply (voltage) changes. The output power of the generator will also change, which is reflected in the transducer in the mechanical vibration from big to small, resulting in an unstable cleaning effect. Therefore, it is necessary to stabilize the output power and adjust the power amplifier through the power feedback signal to make the power amplifier stable.
Ultrasonic generator features:
1. Automatic frequency tracking: once the device has completed its initial setup, it can operate continuously without having to adjust the generator.
2. Automatic amplitude control: when the load characteristics of the transducer change, the driving characteristics can be adjusted automatically to ensure the steady amplitude of the tool head.
3. System Protection: ensure that the system has strong reliability under the correct operating conditions, when the system is not suitable for operating conditions (such as high temperature, over-current, over-voltage, under-voltage, system error, etc.), the generator will stop working and an alarm will be displayed to protect the generator and other system components from damage.
4. Amplitude adjustment: the amplitude can be increased or decreased instantaneously in the working process. The amplitude setting range is 0% ~ 100%.
Automatic frequency search: can automatically determine the working frequency of the tool head and storage.
Ultrasonic generator purpose:
The ultrasonic generator is widely used in plastic welding, ultrasonic nozzle, weaving, non-woven continuous welding, slitting, edge sealing, shearing, and edge sealing of plastic film, etc., it can send ultrasonic waves continuously or control the time of ultrasonic wave according to the need. It can trigger operation and also can be installed on the automatic production line to realize automatic production.