SERIES-TYPE INDEPENDENT INVERTER

摘要

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. The inverter of the invention makes it possible to increase the output voltage frequency in wide limits, while maintaining its efficiency as well as the parameters of its silicon controlled rectifiers at a higher level. In addition, the inverter of the invention offers normal operation when the load resistance varies from zero to infinity.