Abstract: A series-type independent inverter comprising a bridge network that includes silicon controlled rectifiers, the bridge network having an a.c. diagonal provided with a circuit comprised of LC-elements, and having a d.c. diagonal provided with a coupling capacitor, and also comprising at least one uncontrolled semiconductor rectifier adapted to limit the voltage across the silicon controlled rectifiers. The inverter includes a saturated ferromagnetic element with a polarized magnetic circuit and with a primary winding inserted in the d.c. diagonal of the bridge network and adapted to form together with the latter a ferroresonance circuit, and also includes a filter tuned to a frequency that is a multiple of the input frequency of the saturated ferromagnetic element and connected to the secondary winding of the element.