Analysis of the hollow spiral coil sensing principle two structures

Hollow spiral coil emphatically analyzed two structures sensing principle and the mechanism of resistance to external magnetic interference deduced their mutual inductance is calculated and studied to explore the practical engineering of a variety of air-core coil spiral structure; affect spiral hollow coil performance factors were analyzed, and the corresponding measures to solve; designed experimental model, and thus the experimental testing and research; Finally, the study explored the hollow spiral coil electronic current transformers at high pressure, the low pressure  Electric energy meter  technology devices and made PCB planar spiral hollow coil can be used as the focus of future research and application. Theoretical analysis and experimental results show that: the hollow spiral coil current sensor  electric meter  frequency bandwidth, fast response, anti-electromagnetic interference capability, and can accurately measure small currents, as an electronic energy meter and relay dedicated current transformer Similarly, since no magnetic saturation, but also for medium and high voltage high current measurement system. The patented technology, which for the development of new electronic current transformer has important theoretical significance and practical value.