IMPROVEMENTS IN METHODS AND DEVICES FOR ALTERNATIVE POWER SUPPLYING OF A LOAD WITHOUT DISCONTINUITY OF THE ALTERNATIVE SIGNAL

摘要

THE INVENTION CONCERNS THE ALTERNATIVE POWER SUPPLY, WITHOUT DISCONTINUITY, OF A LOAD, FROM AN ALTERNATIVE MAIN SOURCE (TERMINALS 13, 14) OR FROM AN AUXILIARY EMERGENCY SOURCE (TERMINALS 15, 16). / P P WHEN THE MAIN SOURCE IS AGAIN CONNECTED TO TERMINALS 13, 14 AT THE END OF A BREAK, A DECREASE IN THE FREQUENCY OF OSCILLATOR 19 OF THE STATIC INVERTER 19, 20, IS COMMANDED (IN 26), 3, FREQUENCY WHICH IS COMPARED (EN 27) TO THAT OF THE MAIN SOURCE. AT COINCIDENCE, WE CONNECT WITH SWITCHES 28, 24, THE MAIN SOURCE TO THE PRIMARY OF TRANSFORMER 1 AND BLOCK (AT 23) THE STATIC UPS.