Validation of Inductor Analytical Loss Models under Saturation Conditions for PWM inverter

A Predesign Methodology for Power Electronics Based on Optimization and Continuous Models: Application to an Interleaved Buck Converter

“…It is evaluate both losses models and a global thermal model. For core losses, IGSE [20] was u winding AC and DC losses, the simple formula from [21] was chosen, even if method could have been used as in [22]. Knowing the losses, the inductor geom material data, a 2D thermal model [23,24] (Figure 9) helps to obtain the inductor h temperature, which has to stay below a certain limit.…”

Predesign Methodology of Voltage Inverters Using a Gradient-Based Optimization Algorithm

“…For example, the inductor can saturate during the peak current over a low frequency period, leading to an increased ripple, but with a smaller core area, thus reduced mass. The complete method is given in [20], and consists in computing the magnetic flux ripple with Lenz law and the B(H) curve of the material. The time-domain variation of flux is then used to compute iron losses with improved Steinmetz equation (iGSE) [21].…”

“…The time-domain variation of flux is then used to compute iron losses with improved Steinmetz equation (iGSE) [21]. Equation ( 5) is an analytical version of iGSE described in [20] using the switching time of the PWM scheme 𝑡 𝑜𝑓𝑓 and 𝑡 𝑜𝑛 function of j the discretization index from 0 to m. These calculations make it possible to compute also copper losses, and some spectral analysis elements described previously.…”

“…Calorimetric test benches (Fig. 20) are used to measure precisely the losses of active and passive components [20].…”