Patent ID: 6496387
Filing Date: 2002-12-17
Classification: H05B

Abstract:
An energy converter for supplying electric energy from an energy source to a load, the energy converter comprising:a transformer having a primary side and a secondary side, the secondary side being adapted to be connected, in operation, to the load, at least a first and a second series-arranged, controllable switch to be connected, in operation, to the energy source, diodes arranged anti-parallel to the first and the second switch, and a control device for generating control signals with which the first and the second switch are opened and closed for generating an alternating current in the primary side of the transformer, the control device comprising means for comparing a threshold value with the value of a quantity which is related or equal to a change of the voltage per unit of time at a node of the first switch and the second switch for determining switching instants of the first and the second switch, wherein, the control device being adapted to determine a maximum value of said quantity and to determine the threshold value on the basis of the determined maximum value of the quantity.