ORGANIZATION : Compumag 2017
JOURNAL :
YEAR : 2017.06
VOL :
PAGE :
Carbon-steel-based solid cores, such as SK5, SWCH10A, and GI1t, have typically been used in vehicle horns, thanks to their superior cost-effectiveness and productivity. Such cores, however, induce high eddy current loss and generate the corresponding thermal energy in a time-varying magnetic field. Consequently, the conventional vehicle horns are usually exposed to a high temperature environment and their efficiency is also deteriorated. Thus, this paper proposes a novel configuration of vehicle horn employing rolled silicon electrical steel sheets as a solution for the aforementioned phenomena. The silicon electrical steel sheets, 50A470, are rolled around pole and armature of a conventional model to pass through a time-varying magnetic flux, prevent its eddy currents from flowing in closed loops, and reduce the consequent eddy current loss. Moreover, such steel sheets also reduce the input current and the joule loss in copper winding by means of the increased equivalent iron loss resistance. As a result, the novel vehicle horn produces a lower iron loss and joule loss than the conventional model while generating a similar electromagnetic force acting on itself. Additionally, its analytical approach called as the coupled electromagnetic circuit is developed for the repetitive design procedure. Finally, an optimum prototype is manufactured and tested so as to validate its effectiveness compared with the conventional vehicle horn.