Switch mode electrical power converter

A switch mode electrical power converter, configured to operate connecting periodically a primary port with a secondary port, the primary port including a DC energy source and the secondary port including a DC load, the switch mode electrical power converter comprising:

• a transformer or autotransformer, including a magnetizing inductance, each transformer winding comprising a series inductance;
• at least a first power switch driven from a first driver terminal and having a first capacitance in parallel;
• at least a second power switch driven from a second driver terminal and having a second capacitance in parallel;
• and
• a driver configured to turn on and off the at least a first power switch and the at least second power switch by using driving signals of the first driver terminal and of the second driver terminal;
• the first power switch being arranged in a primary side of the transformer or autotransformer and the second power switch being arranged in a secondary side of the transformer or autotransformer, the first power switch and the second power switch being configured to connect the DC energy source to the DC load, through the transformer or autotransformer;
• and
• the first power switch and the second power switch being configured to be operated under the action of a corresponding driving signal provided by the driver and applied to the first and second driving terminals, and configured to provide a direct conducting status during a direct conduction time with a direct transfer of power from the primary port to the secondary port through the transformer or autotransformer with a limited magnetic energy storage, the limited magnetic energy storage being reset during a reset time of the switch mode electrical power converter;
• a variety of sequences of intervals including corresponding topological circuits are obtainable and configured to assisting in a demagnetization of the transformer or autotransformer during a reset time under a switching frequency, starting with an interval including the first capacitance followed by another interval including the second capacitance after a phase shift;
• and
• a mean value of the current through the second power switch during the direct conduction time multiplied by the ratio between the direct conduction time and the switching frequency period is configured to determine a gain of the switch mode electrical power converter,
• a regulation of the switch mode electrical power converter is controlled by a variation of at least one of the switching frequency variation, a duty cycle of the first power switch and/or the second power switch and the phase shift,
• the variety of sequences of intervals comprise:
• a direct conducting status interval, interval A, in which both the first power switch and the second power switch are in On state, interval A configured to provide a direct power flow from the primary port to the secondary port through the transformer or autotransformer, and
• a transformer reset before a next switching cycle comprising:
• an interval B in which the first power switch is in Off state, and the second power switch is in On state, interval B configured to produce reset voltages determined by the winding series inductances, the magnetizing inductance, the first capacitance, and input and output voltages;
• an interval C in which the first power switch is in Off state, and the second power switch is in Off state, interval C configured to produce reset voltages determined by the winding series inductances, the magnetizing inductance, the first capacitance, the second capacitance, and the input and output voltages;
• and
• an interval D in which the first power switch is in On state, and the second power switch is in Off state, interval D configured to produce reset voltages determined by first winding series inductances, the magnetizing inductance, the second capacitance, and the input and output voltages;
• and
• the variety of sequences comprises a sequence A-B-C-D, a sequence A-B-D, or a sequence A-B-A-D, provided by the driving signals.