Patent ID: 8760005
Filing Date: 2014-06-24
Classification: H02J,Y02B,Y04S

Abstract:
1. A control method of an uninterruptible power supply (UPS) for extending a discharging time under a no-load condition, wherein the UPS is equipped with a battery and a mains power charges the battery of the UPS, the control method comprising steps of: determining if the mains power is abnormal; entering a battery mode so that the battery continuously discharges when the mains power is abnormal; determining if the no-load condition is present; instructing the battery to discharge by repeating an alternate on and off cycle after the no-load condition continues over a period of time; determining if the no-load condition is not present when the battery discharges; and entering the battery mode so that the battery continuously discharges when the no-load condition is not present.