| 摘要 |
Device for supplying power to a unidirectional load such as a magnetron from a low-voltage direct current source, comprising a structure of the push-pull type, including at least one transformer (T1) with double primary, the windings of which are respectively connected to two electronic switches (P1 and P2) controlled by a control device (9), and the secondary of which includes a capacitor (C1) mounted in series with a diode (D2) and the magnetron mounted in parallel on the diode. According to the invention, the push-pull structure is of the current resonance type and the control device (9), on the one hand, cyclically closes the switches (P1 and P2) and, on the other hand, opens the said switches when the current flowing through the primary of the transformer passes through zero, so as to synchronise the conduction time of the switches with the resonance. <IMAGE> |
