Modified Core Loss Calculation for High-Speed PMSMs With Amorphous Metal Stator Cores

Core Loss Estimation for an Inverter-Fed Induction Motor With More Accurate Realisation of Material Non-Linearity and Impact of Hysteresis Minor Loops

“…The proposed method uses flux density waveforms retrieved from the FEA and evaluates the CL in the post-processing. The formulation of the proposed method employs the superposition based approach for P Eddy and, time-domain approach for P Hyss [10][11][12], which, in classical form (for a homogeneous distribution of B) is expressed as [18], [19]…”

“…In inverter fed motors, flux density waveforms (of different motor segments) consist of higherorder time harmonics, which results in several minor loops. Net hysteresis loss in these cases is taken to be the sum of areas of all the loops [11]- [12]. However, this method results in higher P Hys s because the sum of areas of the loops created by each harmonic independently is greater than the actual hysteresis area.…”

“…These models are modified for improved versions of either the Steinmetz equation or the classical two-term (eddy current loss term and hysteresis loss term) CL model [3], [4]. The modification passes from the addition of excess loss term [5] to making the loss coefficients variables [6]- [11] and improvements in the Jiles-Atherton (JA) model [12], [13]. All these approaches have their tradeoffs in terms of characterization of loss coefficients [11], lack of flexibility [14], computation time [14], limited application domain [15], and complex realization [13].…”

“…The modification passes from the addition of excess loss term [5] to making the loss coefficients variables [6]- [11] and improvements in the Jiles-Atherton (JA) model [12], [13]. All these approaches have their tradeoffs in terms of characterization of loss coefficients [11], lack of flexibility [14], computation time [14], limited application domain [15], and complex realization [13]. In a benchmark development, [16], [17] present fast methods by introducing hysteresis and eddy current loss coefficients.…”

High-Frequency Core Loss Analysis of High-Speed Flux-Switching Permanent Magnet Machines

“…To consider the effect of rotational magnetization on core loss, the core flux density is decomposed in the radial and tangential directions, namely B r and B t . Since at any moment the core flux density can be regarded as the vector sum of B r and B t [20], the core loss is the sum of two components due to alternating magnetizations in the radial and tangential directions:…”