PWM Inverter-based High Frequency AC Power Architecture for Space Application

This paper presents a pulse-width-modulated (PWM) inverter-based high frequency AC power distribution system for space application. The complete power train is described in adequate detail. Critical design challenges are identified for both harmonic trap filters as well as inverter-side LC filter. Considering realistic tolerance in inductor fabrication, a trap filter design approach is proposed to ensure best possible harmonic attenuation. Also, to minimize any circulating current between the LC filter and harmonic trap filters, a tractable design guideline for the filter capacitor is proposed. Both these design approaches are validated using MATLAB simulation and also on experimental prototype by transferring 0.5 kW of power through a 50 $\mathbf{V}_{peak}$ , 10 kHz AC system.