Patent ID: 9584042
Date: 2017-02-28
CPC Classifications: H02M,Y02B

Claim:
1. A method for controlling switching of an inverter, wherein a bridge is adapted to chop a voltage from a direct voltage source for feeding a chopped voltage to a primary of a transformer; the inverter comprising a diode rectifier circuit receiving an input voltage from a secondary of the transformer in order to achieve a voltage fed to a chopper which feeds a load; said bridge comprising at least a first branch and a second branch, each being formed by a pair of electronic switches arranged in series with each other; wherein common terminals of the pair of electronic switches are connected to terminals of said primary; each electronic switch being provided with a recirculation diode arranged in parallel, the method being characterized so as to comprise the execution of: a step in which the switches of said bridge are driven such that a power supply source is disconnected from said primary and the terminals of said primary are reciprocally connected by at least two of said pair of electronic switches provided with said recirculation diodes such that a voltage present on the secondary of said transformer is null; and switching at least one electronic switch of at least one of said first branch or said second branch of said chopper when the voltage on the secondary is substantially null, wherein switching during the period when the voltage on the secondary is substantially null minimizes losses, because, when the voltage on the secondary is substantially null, said voltage on the secondary is not then applied to the primary, since the primary has terminals that are short-circuit connected one with the other by the connection of at least one of the at least two of said pair of electronic switches provided with said recirculation diodes of the first or second branch of the bridge.