Presentation Information
[B-19-21]Simulation and experimental evaluation of a spiral-toroidal vector-potential coil fabricated by metal 3D printing
〇Hikaru Okuno1, Daibo Masahiro1 (1. Iwate Univ.)
Keywords:
Vector potential
This paper presents a titanium-alloy spiral-toroidal vector-potential coil fabricated by metal 3D printing and evaluates its vector-potential distribution and induced voltage. The coil was designed to generate vector potential in the central hollow region for non-contact application. It consists of 128 parallel spiral conductors arranged along a toroidal shape to reduce inductance. Its major radius, cross-sectional radius, and terminal inductance were 71.8 mm, 28.0 mm, and 0.4 μH. The vector potential was calculated with a line-integral model by discretizing each spiral conductor into short segments. The |A| distribution on the Y=0 plane was evaluated per 1 A total primary current, and Z-directed sensing sections of the secondary coil indicated the measurement positions. Four secondary paths were placed at about 4, 14, 24, and 34 mm from the center with a Z-directed length of 150 mm. The primary coil was driven at 100 kHz and 0.087 Arms, and terminal voltages were measured. The induced voltages agreed with RMS simulation within a maximum error of 6.3%, confirming that the line-integral model can evaluate the vector-potential distribution and secondary-coil voltage.