Application Cases

With the advancement of technology, energy issues have always been a focus of public attention. While clean energy sources such as wind and solar power are already in widespread use, other abundant environmental energy sources exist in nature, such as vibration energy and tidal energy. Vibration energy, as a common form of energy, is widely present in everyday environments such as transportation vehicles, natural surroundings, and buildings, as well as in life activities like human motion and heartbeats. Harvesting vibration energy from the environment to generate electricity for electronic devices holds great potential, as vibration energy is highly prevalent, offering vast opportunities for development.

In the study of vibration energy materials, inducing material vibration is essential. Common vibration instruments include vibration exciters and oscillators, with specialized vibration exciters being widely used in current research and applications. These exciters are typically driven by power amplifiers. Aigtek's ATA-300 series power amplifiers are extensively applied in the field of vibration exciter driving, with a maximum output voltage of 160 Vpp, a maximum output power of 810 W, capable of driving most vibration exciters.

Experiment Name: Vibration Energy Harvesting Experiment for Piezoelectric Materials Based on Vibration Exciters

Experimental Principle: The vibration exciter vibrates, causing the piezoelectric material to vibrate and deform. Based on the inverse piezoelectric effect, the piezoelectric material generates a voltage, which is collected to achieve energy harvesting.

Experimental Block Diagram:

Experimental Setup Image:

Experimental Procedure:
A vibration control system outputs a sinusoidal frequency sweep signal with a frequency range of 80–120 Hz and an amplitude of 2 Vpp. This signal is input into an ATA-309C power amplifier, which amplifies it to produce a 30 Vpp sweep voltage signal to drive the vibration exciter. The vibration exciter is equipped with an accelerometer and the piezoelectric material under test. The accelerometer captures the vibration frequency of the exciter and feeds it back to the vibration control system, forming a closed-loop circuit. The piezoelectric material generates voltage due to the vibration of the exciter, and its resonant frequency points are tested.

Experimental Results:
The frequency sweep voltage signal is input into the vibration exciter, causing it to vibrate within the frequency range and inducing vibration in the piezoelectric material. The vibration control software system monitors the output voltage of the piezoelectric material, which varies with frequency changes. The software system can detect the resonant points and the corresponding voltages at these points.

Role of the Power Amplifier:
The power amplifier serves as the core component of the entire experiment, providing 20–800 W of driving power to induce vibration in the exciter.

Power Amplifier Recommendations:
ATA-300 Series Power Amplifiers, ATA-3000 Series Power Amplifiers

Figure: ATA-300/3000 Series Power Amplifier Specifications

Application Areas: Industry, Aerospace, Transportation, Automotive, Marine, Construction

Application Scenarios: Self-Charging, Vibration Energy Storage, Power Supply for Microelectronics

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