| 摘要 |
PROBLEM TO BE SOLVED: To provide a power measuring device capable of measuring power easily without separately measuring a power factor. SOLUTION: The power measuring device includes: a magnetic field sensor 10 including a ferromagnetic thin film disposed in parallel with a primary conductor where an alternating current flows, a power feed section connected to the primary conductor and including input/output terminals for supplying an element current to the ferromagnetic thin film via a resistor, and a detection section for detecting output across the ferromagnetic thin film end; and a DC component extraction section 50 for extracting DC components from output of the detection section. COPYRIGHT: (C)2011,JPO&INPIT |
