An ultrasonic generator is a device that converts utility power into a corresponding high-frequency alternating current of a transducer to drive a transducer, and is an important component of a high-power ultrasonic system, and can also be called an electronic box. Ultrasonic drive power supply, ultrasonic controller. Although the ultrasonic generator can also be referred to as an ultrasonic driving power source, in reality, the ultrasonic generator is only a part of the ultrasonic driving power source. Ultrasonic power can be divided into self-excited and excited according to different excitation modes, and ultrasonic generator refers to its ultrasonic power supply, because its excited oscillation circuit is more than 10% higher in self-excited output power. Therefore, most of the ultrasonic generators currently used as the driving power source.
The input of the ultrasonic generator is a fixed frequency signal. The waveform of the signal is indefinite, sinusoidal and pulseable, but its frequency is fixed to the frequency of the transducer, generally 20, 25, 28, 33, 40, 60 KHz. Through the internal conversion of the ultrasonic generator, its output is a power signal, a frequency tracking signal, and the like.
Since the output signal exhibits an unstable state with the change of the input signal, the feedback part is also contained in the part of the ultrasonic generator, and the feedback effect is mainly reflected in two aspects:
On the one hand, the change of the input signal leads to the instability of the output power, which makes the mechanical vibration of the transducer irregular, resulting in poor cleaning effect. After adding the feedback part, the power feedback signal adjusts the output power so that it does not follow the input signal. The change of the change, showing a stable state, the regular mechanical vibration of the transducer makes the cleaning effect better.
On the other hand, the transducer frequency is the most efficient at the resonance frequency point, but in the actual situation, it cannot be always working in the optimal state for various reasons, so the feedback part plays its role, providing the frequency tracking signal, and controlling The signal from the signal generator is always at the resonant point of the transducer, allowing it to operate at its optimum.
In addition to this, the ultrasonic generator has the following functions:
1. The ultrasonic generator can monitor the working frequency and power of the high-power ultrasonic system.
2, according to different requirements of users, real-time adjustment of various parameters: such as power, amplitude, running time and so on.
Frequency fine-tuning: The frequency is adjusted so that the ultrasonic transducer always works at its optimum state, and the efficiency is maximized, and the adjustment range is 2%.
Automatic follow-up: Once the device has been initially set up, it can be operated continuously without the need to adjust the generator.
Amplitude control: When the load changes during the operation of the transducer, the drive characteristics can be automatically adjusted to ensure a stable amplitude of the tool head.
System protection: When the system works in an unsuitable operating environment, the generator will stop working and display an alarm to protect the device from damage.
Amplitude adjustment: The amplitude can be increased or decreased instantaneously during the working process. The amplitude setting range is 0%~100%.
Automatic frequency search: The working frequency of the tool head can be automatically determined and stored.
Ultrasonic generator features
1. The panel is provided with an output intensity strip device, and also has a unique frequency and output intensity alternate digital display device optional;
2. The frequency sweeping function with adjustable intensity is used to continuously change the sound field distribution in the cleaning tank, avoid the generation of linear cavitation etching lines on the surface of the workpiece, and also cause the dirt on the surface of the workpiece to fall off quickly, thereby improving the cleaning effect;
3. It has power adjustment function, adopts advanced power adjustment circuit, realizes stepless smooth adjustment of ultrasonic power, and overcomes many disadvantages caused by the traditional method of adjusting power by adjusting frequency indirectly;
4. It has the unique anti-collision function in China, which overcomes the problem that the traditional generator is easy to produce grain on the surface of the workpiece and damages the workpiece, and also avoids the disadvantage of breaking through the groove body due to cavitation;
5, has an original function of repelling dirt, so that the dirt quickly leaves the workpiece floating on the surface, suitable for overflow circulation mode cleaning;
6, with overheat protection, can protect the generator from damage.
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