US 6,473,323 B1Granted

Device for transferring energy to a transformer secondary during a predetermined time period

AssigneeThomson-CSF Sexant

InventorChristophe Taurand

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Abstract

A device for transferring power by an electrical energy transformer, and in particular by a magnetic coupler, including on a primary side a primary winding in series with an alternating source and on a secondary side a secondary winding, a rectifier bridge, and a load. The rectifier bridge includes two diodes arranged in series with the secondary winding and two MOS transistors also in series with the secondary winding. The load is connected on the one hand to a point common to the two diodes and on the other hand to a point common to the two MOS transistors. A mechanism is provided for switching the MOS transistors in such a way that they are simultaneously in the ON state for a predetermined duration. Such a device may find application to cases of weak coupling between a primary side and a secondary side.

Claims4

Dependent claims

A power transfer device including a transformer having a primary winding configured to receive energy from an alternating energy source and a secondary winding configured to transfer the energy being received by the primary winding to a rectifier bridge connected to a load, wherein the rectifier bridge comprises:

two diodes respectively connected to a first side and to a second side of the secondary winding, each diode being further connected to a first common point connected to a first side of the load;
two MOS transistors respectively connected to the first side and to the second side of the secondary winding, each MOS transistor being further connected to a second common point connected to a second side of the load;
and
a controller circuit configured to switch each said MOS transistor to be simultaneously in an ON state during a determined time period while the two diodes are off.

1 more element

Dependencies are inferred from the claim text.