Abstract
A 500 W microcontroller-based power supply circuit for the piezoelectric transducers used in ultrasonic cleaning machines is presented. The powertrain consists of a boost converter, including AC supply power factor correction, followed by a digitally programmable buck converter delivering the DC bus voltage for a half bridge inverter, driven by a suitable signal from the microcontroller oscillator. Detection of the resonance frequency of the piezoelectric transducer is performed at startup by measuring the load current on the DC bus through a hall sensor.
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Grassi, M., Liberale, A., Elkhayat, M., Malcovati, P. (2020). A 500 W Microcontroller-Based Powertrain Circuit for Ultrasonic Cleaning Machines. In: Di Francia, G., et al. Sensors and Microsystems. AISEM 2019. Lecture Notes in Electrical Engineering, vol 629. Springer, Cham. https://doi.org/10.1007/978-3-030-37558-4_9
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DOI: https://doi.org/10.1007/978-3-030-37558-4_9
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