Integration of a Three-Phase and Zero-Phase Current Sensor Using a Coaxial Bar Structure
| Autor: | S. Wakui, T. Asada, T. Kudo |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Materials science
business.industry Zero phase Electrical engineering Condensed Matter Physics Residual Current transformer Manufacturing cost Electronic Optical and Magnetic Materials Three-phase Current sensor Electrical and Electronic Engineering Coaxial business Instrumentation Leakage (electronics) |
| Zdroj: | Journal of the Magnetics Society of Japan. 30:545-549 |
| ISSN: | 0285-0192 |
| DOI: | 10.3379/jmsjmag.30.545 |
| Popis: | This paper describes the integration of a three-phase current sensor and a zero-phase current sensor via a coaxial bar structure. A coaxial bar structure was therefore used, as it improves the accuracy due to the exclusive use of the zero current transformer (ZCT) and the current sensor. The ZCT’s high-sensitivity magnetic sensor is an MI element, while the current sensor employs a Hall-effect IC. As a result, a sensitivity ratio (the ratio of leakage to residual output) of over 8:1 is obtained for the ZCT, demonstrating the structure’s ability to isolate leakage current. Meanwhile, the linearity error of the three-phase current remains at ±7.9%, well under the ±10% specification. Thus it can be seen that this structure was many advantages, while its sole disadvantage with respect to the conventional ZCT is increased manufacturing cost. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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