SECONDARY POWER SUPPLY Russian patent published in 2005 - IPC

FIELD: electrical engineering; stand-by or no-break power supplies for dc mains.

SUBSTANCE: proposed secondary power supply primarily using alternative power sources whose power can vary within wide range (windmill-electric, hydroelectric, photoelectric, and the like power stations) thereby solving problem of adding energy of transient-voltage source to that of storage battery due to time division between connection of this or that power source to load has transient-voltage source and pulsed semiconductor bridge incorporating first rack formed by series-connected first semiconductor switch and storage battery whose common point is, essentially, center tap of rack; second rack formed by second switch and series-connected reactor and load with capacitor connected in parallel to the latter; common point of switch and reactor is, essentially, center tap of second rack; input diagonally opposite terminals of bridge are connected to transient-voltage source and output ones are shorted out by third semiconductor switch; battery voltage is chosen to be higher than rated voltage of load.

EFFECT: simplified design and enhanced economic efficiency of secondary power supply.

1 cl, 1 dwg