INFLUENCE OF INSULATION COATING OF ELECTRICAL STEEL SHEETS ON LOCAL TWO-DIMENSIONAL VECTOR MAGNETIC PROPERTIES

Shigeru Aihara – Takashi Todaka – Masato Enokizono

   This paper presents a small-sized vector-hysteresis sensor (V-H sensor), which consists of piercing B-needles and double H-coil. The B-needle probe can break through the insulation coating of silicon steel sheets like a drill. The H-coil is made in very small size and the outside dimension is 4mm × 4mm. The magnetic flux density vector B and the field intensity vector H are measured with the B-needle probe and the double H-coil, respectively. The influence of the insulation coating on distributions of vector magnetic properties in transformer model cores is investigated in measurements with the developed very small-sized V-H sensor.

Keywords: vector magnetic property, V-H sensor, needle probe method, H-coil, B-needle

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