Single transformer switching regulator

H - Electricity – 02 – J

Patent

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Details

H02J 3/06 (2006.01) H02J 7/02 (2006.01) H02M 3/335 (2006.01)

Patent

CA 2108073

A switching regulator comprises a single transformer having a primary winding connected in an input circuit for receiving direct-current energy and a secondary winding connected in an output circuit, and a switching transistor connected in series with the primary winding. A high frequency pulse generator triggers the switching transistor so that it interrupts the direct-current energy at a high frequency. A rectifier is provided for converting high frequency energy developed in the secondary winding into direct-current output energy, which is maintained constant by controlling the high frequency pulse generator. A low voltage detector produces a signal when the direct-current energy in the input circuit falls below a specified value. in response to the signal from the low voltage detector, constant direct-current energy is derived from a battery and applied to the output circuit as backup power.

Régulateur de commutation comprenant un unique transformateur ayant un enroulement primaire connecté dans un circuit d'entrée pour recevoir un courant c.c. et un enroulement secondaire connecté dans un circuit de sortie ainsi qu'un transistor de commutation connecté en série avec l'enroulement primaire. Un générateur d'impulsions haute fréquence déclenche le transistor de commutation, qui interrompt alors le courant c.c. à une haute fréquence. Un redresseur permet de convertir le courant haute fréquence produit dans l'enroulement secondaire en courant de sortie c.c. qui est maintenu constant par commande du générateur d'impulsions haute fréquence. Un détecteur de basse tension produit un signal lorsque le courant c.c. du circuit d'entrée descend sous une valeur déterminée. En réponse au signal provenant du détecteur de basse tension, un courant c.c. constant provenant d'une batterie est appliqué au circuit de sortie comme alimentation de réserve.

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