Single-stage high power factor half-bridge resonant technique for linear ultrasonic motor driving circuit

Abstract

This study addresses the design and analysis of a single-stage high power factor half-bridge driver, which is composed of a half-bridge resonant inverter and a buck-boost converter, for a linear ultrasonic motor (LUSM). LUSMs have found their applications in miniaturised actuators and precision position manufacturing industries due to their merits of miniaturisation and high resolution. The triggering signals of both the active switches are generated using asymmetrical pulse-width modulation technique to achieve zero-voltage switching and zero-current switching using proper designed circuit parameters. Then, liquid chromatography resonant technique is adopted to produce 39.6 kHz sinusoidal voltage output. A laboratory-made circuit is built to test the circuit topology. Satisfying results are obtained to verify the validity of the proposed topology.

Review of the design of power ultrasonic generator for piezoelectric transducer

“… Medium power – most of these applications belong to large-scale application scenarios, such as agricultural aerosol cultivation, industrial parts cleaning, ultrasonic assisted grinding, ultrasonic plastic welding, ultrasonic impact strengthening, and ultrasonic deicing. They are also basically powered by the municipal single-phase power supply, and their output power is usually less than 1000 W. The switching power supply module should select the quasi single-stage PFC bridge converter or dual inductor CPP converter, while the inverter module can choose the current-fed full-bridge inverter [166] . Furthermore, for outdoor portable applications or uninterruptible emergency power supplies typically powered by batteries, the boost converter or buck converter should be preferred as the switching power supply module, which can obtain dc links at more efficient power transmission before entering the inverter module.…”