Computer-aided design for class-E switching circuits taking into account optimized inductor designs

Load‐independent inverse class‐E ZVS inverter and its application to wireless power transfer systems

“…The ESR of the shunt inductance $$r_{L_{\rm S}}$$ can be predicted, following the optimal coil‐design method in ref. [36].…”

Survey of modelling techniques used in optimisation of power electronic components

“…A main limitation is that this equation is only good for sinusoidal excitation voltage and can be used whenever applicable. In [23][24][25][26], the basic form of the Steinmetz equation is used to calculate core losses in a resonant module. In [27], this equation is used to calculate core losses in the AC source side of a boost power factor correction (PFC) converter.…”

“…and d is the conductor diameter, δ ω is the skin depth and N l is the number of layers in a multilayer winding. This equation is widely used in the literature along with Fourier analysis and superposition of the current waveform [25,26,30,44,54,60]. In the case of a non-sinusoidal current waveform, AC resistance should be calculated separate for each frequency which requires that [25,26,30,44,54,60] calculated from Dowell equation see (7) and (8) [23, [33][34][35][36][37][61][62][63] equivalent resistance calculated from current wave shape and Dowell equation…”

“…The ratio of this resistance to the DC resistance is given as where A is given and d is the conductor diameter, δ ω is the skin depth and N l is the number of layers in a multilayer winding. This equation is widely used in the literature along with Fourier analysis and superposition of the current waveform [25, 26, 30, 44, 54, 60]. In the case of a non‐sinusoidal current waveform, AC resistance should be calculated separate for each frequency which requires that the circuit be solved for each frequency separately.…”

“…Inductors and transformers are usually custom designed, and therefore their size (weight or volume) can be calculated from their geometry, which is a part of design variable set. This approach is taken in [23–27, 33, 36, 38, 39, 42, 43, 54, 56, 57, 60, 114–121]. In another paper, volume of the inductor is calculated from the area product of the inductor core which can be considered indirect calculation from geometry [39].…”