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该论文提出了一种用于多相压电能量采集器的异步全波整流器，通过采用四分之一圆形状电极的盘状压电发电机，解决了超低功耗系统中整流效率低和等效负载影响能量传输的问题。
Many mechanical vibration-based energy harvesting systems use a piezoelectric transducer as an AC power source, whose output voltage must first be rectified before being delivered to a load. For ultra-low power (<1mW) systems, the rectifier efficiency and its equivalent loading on the piezoelectric transducer largely determine the total power available to the load. This paper describes an asynchronous full-wave rectifier for use with a multiple-electrode disk-shaped piezoelectric generator. By using quarter-circle shaped electrodes, similar to an ultrasonic motor, multiple output voltage phases are obtained from a single resonating piezoelectric disk. Two-electrode transducer outputs are often rectified using a full-wave diode bridge rectifier, which requires a significant voltage drop between input and output, decreasing the rectifier’s voltage efficiency. Previous asynchronous rectifiers use MOS switches
Nathaniel J. Guilar, Rajeevan Amirtharajah, Paul J. Hurst
University of California, Davis, CA