Abstract: The invention concerns a direct energy-transfer converter of the AC/AC or DC/DC type, including a self-regulated synchronous rectifier, in which the rectifier switches are controlled through one or more transformer windings. The converter includes a primary stage with at least one primary winding of a transformer and at least one controlled switch, with a secondary stage having at least one secondary winding (10) of the transformer, and a synchronous rectifier (1) with at least a first switch (20) which is self-regulated and conducting during the conducting phase of the controlled switch of the primary stage, known as the direct energy-transfer stage, and at least one secondary switch (30) which is self-regulated and conducting during the non-conducting phase of the controlled switch of the primary stage, known as the freewheel phase, and an output filter (5).

Abstract: The invention concerns a direct energy-transfer converter of the AC/AC or DC/DC type, including a self-regulated synchronous rectifier, in which the rectifier switches are controlled through one or more transformer windings. The converter includes a primary stage with at least one primary winding of a transformer and at least one controlled switch, with a secondary stage having at least one secondary winding (10) of the transformer, and a synchronous rectifier (1) with at least a first switch (20) which is self-regulated and conducting during the conducting phase of the controlled switch of the primary stage, known as the direct energy-transfer stage, and at least one secondary switch (30) which is self-regulated and conducting during the non-conducting phase of the controlled switch of the primary stage, known as the freewheel phase, and an output filter (5).

Abstract: The present invention relates to a converter secondary circuit having a main output (2) and an auxiliary output (7), the secondary circuit comprising a first synchronous rectifier that is self-controlled and generates a rectified voltage for the main output (2), and said auxiliary output including a second synchronous rectifier receiving at its input said rectified voltage and being regulated by an auxiliary regulation control circuit (8) having a synchronization input (8B). According to the invention, said synchronization input (8B) receives a synchronization signal which is at zero when said rectified voltage is not at zero.

Abstract: The present invention relates to a converter secondary circuit having a main output (2) and an auxiliary output (7), the secondary circuit comprising a first synchronous rectifier that is self-controlled and generates a rectified voltage for the main output (2), and said auxiliary output including a second synchronous rectifier receiving at its input said rectified voltage and being regulated by an auxiliary regulation control circuit (8) having a synchronization input (8B). According to the invention, said synchronization input (8B) receives a synchronization signal which is at zero when said rectified voltage is not at zero.

Abstract: The invention concerns a back-up power supply of the type serving to compensate temporarily for an absence of a DC input voltage (Ve) from a main power supply (15) by delivering a voltage that is higher than a threshold value (Vmin) to a load (10). The main power supply (15) delivers the DC input voltage (Ve) to the load (10) under normal operating conditions, the DC input voltage (Ve) being higher than the threshold value (Vmin), and lying in the range defined by a minimum input voltage (Ve1) and by a maximum input voltage (Ve2). The back-up power supply includes a capacitor (13) charged by the DC input voltage (Ve). According to the invention, the back-up power supply includes means (20, 21) for limiting the charge on the capacitor (13) to a reference voltage (Vr) that is lower than the maximum input voltage (Ve2). The invention makes it possible to reduce the size and the cost of the capacitor (13) of the back-up power supply.

Abstract: A synchronization device for a redundant power supply system synchronizes resetting of tripping type current limiter devices which are reset automatically, to prevent the current limiters tripping out in cascade when the system is started up or automatically reset after the disappearance of a short-term current surge. It includes a synchronization link interconnecting all the current limiters of all the power supply units. Each current limiter includes a generator sending a synchronization signal on the synchronization link periodically and independently for each current limiter. The generator which sends a synchronization signal first resets all the current limiters simultaneously. The device has applications in electronic equipment comprising a plurality of power supply units connected in parallel.