Patent ID: 8422905
Filing Date: 2013-04-16
Classification: G03G,H02J

Abstract:
1. A power source unit comprising: an AC/DC (alternating current/direct current) converter to convert alternating current to direct current output; an auxiliary power source capable of storing electric power; a load detector to detect a high/low level of direct current output to a DC-using load device from the AC/DC converter; and a power supply controller to control power supply according to a required load, wherein, when load to be required exceeds alternating current power source limits, the power supply controller shuts down output of direct current from the AC/DC converter, and instead uses the auxiliary power source to supply power to the DC-using load device, and wherein, when the load to be required is within alternating current power source limits, the power supply controller uses the AC/DC converter to supply power to the DC-using load device while the load detector detects high voltage for the DC-using load device, and the power supply controller uses the auxiliary power source to supply power to the DC-using load device and shuts down the AC/DC converter while the load detector detects low voltage for the DC-using load device.