AUTHOR : Ho-Young Lee, Kyu-Seob Kim, and Jung-Pyo Hong
ORGANIZATION : INTERMAG EUROPE 2014
JOURNAL :
YEAR : 2014
VOL :
ISSUE :
PAGE : ~
According to the trend of the decreasing size of electric machines, the winding techniques for maximizing the space factor have been studied of late in an effort to improve the power density, but such techniques have been found to worsen the eddy current effect, which is caused by the alternating current in the conductor. Therefore, the introduction of the AC resistance needed for the exacted motor performance prediction since the AC resistance loss, which has been ignored, has gradually increased. In the case of the conductor surrounded by the ferromagnetic material, the eddy current effect is dependent not only on the frequency but also on the magnetic saturation in the core. The analytic AC resistance for the slot-bound conductor has been reported, but it does not consider the magnetic saturation in the core. This paper presents the analytic equation considering the magnetic saturation in the core. Also, the EI core, which is identical to the motor shape, was manufactured to verify the reliability of the analytical equation, and was experimented on. As a result, the result of the presented equation has an identical tendency with the test and FEM results.