A Shear-Mode Piezoelectric Heterostructure for Electric Current Sensing in Electric Power Grids
1School of Information Engineering, Baise University, Baise 533000, China. weiheky@yeah.net.
Micromachines
|June 26, 2019
Summary
A novel shear-mode piezoelectric current sensor for electric power grids uses a cymbal structure and permalloy plate. This device achieves high sensitivity and resolution for accurate current monitoring in two-wire power cords.
Area of Science:
- Electrical Engineering
- Materials Science
- Sensor Technology
Background:
- Accurate current sensing is crucial for electric power grid stability and management.
- Existing current sensing methods may have limitations in sensitivity, resolution, or applicability to specific power cord configurations.
Purpose of the Study:
- To develop and characterize a novel shear-mode piezoelectric current sensing device for two-wire power cords.
- To investigate the performance of a piezoelectric heterostructure incorporating a cymbal structure and permalloy plate for enhanced current detection.
Main Methods:
- Fabrication of a prototype sensing device utilizing a cymbal structure (permanent magnet, brass cap, shear-mode piezoelectric materials) and a permalloy plate.
- Experimental evaluation of the device's sensitivity, resolution, and accuracy across a specified current range (1-10 A).
- Analysis of the force amplification effect of the cymbal structure on device response.
Main Results:
- The fabricated device demonstrated an average sensitivity of 12.74 mV/A in the 1-10 A range at d = 0 mm.
- A resolution of 0.04 A was achieved.
- The device exhibited an accuracy of ±0.0177 mV at 1.5 A.
- The heterostructure also functioned as a magnetoelectric device without external bias.
Conclusions:
- The proposed shear-mode piezoelectric heterostructure is effective for current sensing in two-wire power cords.
- The cymbal structure enhances device response through force amplification.
- The developed sensor offers high sensitivity, resolution, and accuracy, with potential for magnetoelectric applications.
Keywords:
cymbal structureforce amplification effectpiezoelectric current sensing devicesensitivitytwo-wire power cordMore Related Videos
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