Method for controlling a voltage converter

Method for controlling a voltage converter comprising:

• a primary circuit comprising:
• two main terminals intended to be connected to an alternating voltage source,
• a rectifier stage delivering a direct voltage, one of the input terminals or the rectifier stage being connected to one of the main input terminals,
• at least one first inverter arm comprising two switches, the first inverter arm being connected between the output terminals of the rectifier stage,
• a first capacitive arm comprising at least two capacitive elements, the first capacitive arm also being connected between the output terminals of the rectifier stage, and
• a first winding of a transformer, connected between a first interconnecting point located between the switches of the first inverter arm and a second interconnecting point connected to the other main terminal, said second interconnecting point being located between capacitive elements of the first capacitive arm, and
• a secondary circuit comprising:
• at least one second inverter arm comprising two switches,
• a second capacitive arm comprising at least two capacitive elements, the second capacitive arm being mounted in parallel with the second inverter arm, and
• a second winding of said transformer, connected between a third interconnecting point located between the switches of the second inverter arm and a second interconnecting point located between the capacitive elements of the second capacitive arm,
• the method implementing the switching of the switches of the inverter arms of the primary and secondary circuits to deliver an output voltage (Vout), characterised in that when the power absorbed between the main terminals of the primary circuit is comprised between two predetermined thresholds, the switches of the primary circuit are controlled to make twice as many switchings as the switches of the secondary circuit over a given period.