Power supply apparatus for a capacitive load

H - Electricity – 02 – M

Patent

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Details

H02M 7/5381 (2007.01) C01B 13/11 (2006.01)

Patent

CA 2675498

The invention provides a power supply apparatus for supplying electric power to a capacitive load. The apparatus has a transformer, a positive half-period driver and a negative half-period driver supplying positive and negative half-periods of voltage to the first coil. The second coil forms an electric resonance circuit and supplies electric voltage to the load. Zero crossings of the voltage supplied to the first coil are determined from a third coil on the transformer, and alternation between positive and negative half-periods of voltage supplied to the first coil is done at the zero crossings of the voltage supplied to the first coil.

L'invention propose un appareil d'alimentation en courant pour fournir un courant électrique à une charge capacitive. L'appareil a un transformateur, un pilote à demi-période positive et un pilote à demi-période négative fournissant des demi-périodes positive et négative de tension à la première bobine. La seconde bobine forme un circuit de résonance électrique et fournit une tension électrique à la charge. Les passages par zéro de la tension fournie à la première bobine sont déterminés à partir d'une troisième bobine sur le transformateur, et une alternance entre les demi-périodes positive et négative de tension fournie à la première bobine est réalisée au niveau des passages par zéro de la tension fournie à la première bobine.

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