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High-power ultrasonic drive power supply--the design of power amplifier

发布:2021-04-21

With the current scientific development and technological progress, the application of ultrasound in the fields of ultrasonic welding, ultrasonic cleaning, drying, atomization, navigation, distance measurement, breeding and other fields is becoming more and more extensive. The output accuracy and intensity of the high-power ultrasonic power supply is driven by selecting the corresponding parameter index according to the actual load. This article introduces a power amplifier, which is a drive device that connects to a signal generator and provides amplifying voltage and power.

The principle of ultrasonic humidifier:

Under the condition of the same amplitude, the energy of an object's vibration is proportional to the vibration frequency. When the ultrasonic wave propagates in the medium, the frequency of the medium particle vibration is very high, so the energy is very large. In the dry winter in northern China, if the ultrasonic wave is passed into the water In the tank, the violent vibration will break the water in the tank into many small droplets, and then use a small fan to blow the droplets into the room to increase the indoor air humidity. This is the principle of the ultrasonic humidifier.

Ultrasonic motor is a new type of direct drive motor widely used at present. It surpasses the category of electromagnetic motor. It generates ultrasonic vibration under the inverse piezoelectric action of piezoelectric ceramics, and converts microscopic vibration into a rotor through the friction between the stator and the rotor. The macroscopic rotation of the motor has applications in many fields, and the drive control technology of the motor is a problem studied in many tests at present.

Aigtek introduced a high-power ultrasonic drive power amplifier, which amplifies the voltage signal input by the signal generator, and monitors the voltage on the oscilloscope by adjusting the amplification factor. ATA-3090 is an ideal power amplifier that can amplify AC and DC signals. The maximum output power is 810W, which can drive power-type loads. The gain is digitally adjustable, and common settings can be saved with one key. It provides you with convenient and concise operation options. It can be used with mainstream signal generators to achieve perfect signal amplification.

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The input is a BNC interface, and the input resistance is 50Ω and 5kΩ optional, which perfectly matches the high and low internal resistance signal sources.

The output is a banana socket, the maximum output voltage is 90Vp-p (±45V), and the output current (peak value) is 18A.

Operation panel LCD display, equipment status and parameter dynamic display, interactive interface is clear at a glance, simple and easy to understand.

The voltage gain can be adjusted from 0 to 30 times by digital control, which can be divided into two types: coarse adjustment (1step) and fine adjustment (0.1 step). Combined with the display of the gain of the LCD panel, it can be quickly adjusted to the required voltage value.

High-power ultrasonic power amplifiers can be used in many fields such as MEMS experiments, piezoelectric ceramics, ultrasonic transducers, hydroacoustic (transducer) magnetic material magnetization characteristics (BH curve) measurement, and medical field (magnetic field biological effects). A kind of capacitive load is driven and stimulated, so as to carry out related research.

Previous post: Don't miss it! 6 kinds of extreme power amplifiers, easy to solve the problem of piezoelectric drive

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