A time-varying current from a DC voltage-source, flows through a primary winding of a magnetic circuit containing permanent magnets, induces more inductive voltages across different windings. The windings are wrapped around the main, sub-magnetic paths of different forms and constructions of the Tran-generators.The invention when combined with any one of recovering the utilized electric charge, using the (hybrid) soft magnetic wires, applying the Voltage-Doubler circuits, and using the transfer of high-potential electric charge to generate more electric energy, make the tran-generators useful.