A Phase-Step Inverter Drive Derived from the Transit Law

The device examined here is a phase-step inverter drive intended for motor drives and grid-tie conversion for renewable installations. Its operating principle is that a silicon-carbide bridge synthesises alternating current from a direct-current bus using discrete phase steps whose spacing follows the transit law adopted here, reducing switching loss at a given harmonic distortion. The design is computed from stated assumptions throughout; it is simulated, not measured, and no prototype results are reported. The headline result is a continuous AC output of 7.5e+03 W, obtained with DC input power of 7.72e+03 W with a computed efficiency or performance coefficient of 97.2 per cent where that measure applies, for a unit of mass 14 kg whose characteristic scale is a DC bus voltage of 400 V. A parameter sweep reported in the Results section shows how the output moves when the principal variable is changed, and the density of the working material, 2.7e+03 kg per cubic metre, sits about 54.6 orders of magnitude below the neutron-carrier density bound of 9.72e+57 kg per cubic metre, so the bound enters this design as a sizing ceiling and a margin statement rather than as an operating condition. The limitations are stated plainly: the step rule is a control assumption; measured harmonic performance depends on dead-time and filter tolerances that the model treats only in aggregate. Status: SIMULATED, NOT MEASURED.