High frequency ultrasonic generators and amplifiers
🔹What are the limitations of linear amplifiers?
The production of high-frequency power ultrasound typically relies on electronic techniques derived from radiofrequency linear amplifiers.
Their main drawbacks include efficiency, size, weight, and a limited ability to adapt to a load composed of piezoelectric transducers.
They do not allow the control of the power delivered to the transducer or adaptation to its behavior based on changes in environmental parameters (temperature, pressure, medium, etc.).
🔹SinapTec’s new solution
Digital Ultrasonic Generator & Amplifier
The new generation of digital amplifiers provides an effective solution to the previous limitations. This innovation will be presented by our colleague at the JSUP 2023 conference.
Thanks to the integration of a FPGA technology, our system allows to:
- Generating and controlling ultrasound up to 5 MHz
- Simultaneously acquiring real-time data
- Internally measuring active power, reactive power, voltage, and current at the terminals of the transducer(s)
It becomes possible to ensure optimal control of the operating conditions of the amplifier and transducer system (frequency regulation, power, etc.).
🔹Real-World Application
This system has demonstrated its effectiveness in HIFU applications at the nominal frequency of 1 MHz. The application involves controlling the emission beam on an 8-element transducer to create very high acoustic pressure at the focal point, ensuring cavitation. Successfully tested in a water tank, the generator provides remarkable results with different durations, amplitudes and focal positions.
🔹Performance obtained
Pulses ranging in duration from 10 µs to 500 ms with a 2% duty cycle were generated, achieving a maximum effective power of 300 Watts per channel, totaling 2400 Watts electrically. Thrust measurements allow the assessment of the maximum acoustic power at 1700 Watts, resulting in an efficiency of 80% compared to the transmitted electrical power.
🔹 Future Perspectives
Our system opens new perspectives for multichannel ultrasonic solutions in medical and industrial applications, providing high energy levels, real-time control, and strong adaptability to environmental variations.
Contact us or join us at the JSUP conference to discover how our system can transform your ultrasonic applications.
