Multiport Model Order Reduction With Multiple Expansion Points

Abstract

Multiple expansion points are introduced to the multiport Cauer ladder network method to realize an efficient model order reduction of an eddy-current field. The proposed method can set multiple target frequencies to cover a wide frequency range with a small number of multiport electric network elements. A time-dependent response to pulsewidth-modulation (PWM) excitation is accurately reconstructed by setting the target frequencies at both fundamental and carrier frequencies.