Multirate Time-Domain Simulation of Field/Circuit Coupled Pulse-Width-Modulation Controlled Devices

In this contribution a tailored approach for the simulation of electrical devices with pulse-width-modulated (PWM) supply is proposed. The method is based on decomposing time into fast and slow components similarly to the multitone partial differential approach. To this end, dedicated duty-cycle dependent piecewise polynomial PWM basis functions are introduced. They allow for large switching-frequency-independent time steps and thus significant computational savings. The method is applied to a buck-converter, modeled as a field/circuit coupled system.status: accepte