Characterization the influences of diodes to piezoelectric energy harvester

Abstract

This study discloses the diode's influences on the piezoelectric energy harvesting performance. The piezoelectric-based energy harvesting system plays an important role in scavenging environment vibration energy into electrical energy, which can be utilized by low-power electronic devices. With respect to the interface circuit, a full-wave bridge circuit is usually needed to rectify the alternating current (AC) signal into a direct current (DC) signal. The full-wave bridge is composed of four diodes, whose characteristics may influence the harvested power significantly. Therefore, in this paper, the diodes' properties and influences on the energy harvesting performance are analyzed and presented via simulation and experimental studies. It is found the harvested energy has close relationship with the diode characteristics. For the high source impedance case, diode with low reverse leakage current is favorable. For the low source impedance case, diode with low forward voltage drop is favorable. The corresponding experimental study is carried out via a piezoelectric beam, which shows that the measured harvested power differences can almost be up to 800% for the same test structure. ARTICLE HISTORY

An Improved Self-Powered H-Bridge Circuit for Voltage Rectification of Piezoelectric Energy Harvesting System

“…However, this diode suffers from another drawback, which is its high reverse leakage current. When it is in reverse bias mode, current flows through the depletion region, resulting in dissipation of power in the form of heat [19], [21], [32]. On the other hand, Devi [33] proposed the use of zero-bias Schottky diodes with low forward voltage and rapid switching function.…”

“…The electricity generated can be used to power electronic devices (load) or be stored in storage devices such as batteries for later use. The electrical energy harvested from PD is in micro-scale, which can be used for powering remote sensors for structural health-monitoring (SHM) purposes [14], [15], for powering medical devices [16], for feeding loads in military [17], for powering cameras for animal tracking [18], and for charging mobile phones [19]. Electrically, a vibrating PD behaves as a capacitive AC source [20].…”

On the Sensing, Actuating and Energy Harvesting Properties of a Composite Plate with Piezoelectric Patches

“…One effective approach is including diode-based components that can guarantee one directional voltage. For example, the Schottky diode offers low forward voltage and high switching speed and is considered as an ideal component for energy harvesting applications [27].…”

“…The first term inside the brackets in (27) is the amplitude of the charge Q V gen generated by the applied voltage V 0 = Ve i t , and the second term describes the amplitude of the charge Q q 0 gen generated by the applied force q = q 0 e i t ∶ The first expression in (28) can be used to investigate the sensing properties of the structure. In order words…”

Recent Developments of Acoustic Energy Harvesting: A Review

“…The incident acoustic energy can be focused by such a device and piezoelectric, electromagnetic, or triboelectric effects can be used for energy conversion. After conversion, a power-managing circuit is used for voltage rectification [20], regulation, and impedance matching. At the peripheral side, a power-saving unit, such as a supercapacitor, is used for energy storage.…”