On Modelling Piezoelectric Transducer

The piezoelectric transducer (PT) is the main element that affects the Acoustic Power Transfer system (APT). In recent years, the development of wireless power transfer has led to increased demand for ultrasonic transducers as electroacoustic conversion elements with excellent characteristics. It is particularly important to study piezoelectric transducers, among which piezoelectric materials are key to their high performance. The existing five basic piezoelectric materials are summarized in the paper, and their representative piezoelectric transducers and advantages are listed. In addition, an accurate and comprehensive analytical model is the key enabling tool for designing a highly efficient APT system. The electrical equivalent circuit method can analyze the APT system simply and quickly. Moreover, this method has been widely used in the design and analysis of ultrasonic transducers. In this paper, the development diagram of the piezoelectric transducer over time is listed, and the equivalent circuit of the basic piezoelectric transducer is analyzed.