The operating range of a zero-voltage switched inverter is typically constrained by the source and load variation. This paper adopts a variable turns ratio coupled magnetic type soft-switching inverter for a wide-range source and load adaptability. The inverter can be used in high power applications, and achieve high efficiency. The operating principle and design guideline are described in detail. Simulations have been conducted with Pspice, and the results prove the superiority of the proposed soft-switching inverter design.