A Device for Improving the Voltage Sag Ride Through Capability of PCs

作者：Shareef H^*; Mohamed A; Mohamed K

来源：International Review of Electrical Engineering, 2010, 5(4): 1413-1417.

• Voltage Sag
• Ride Through Capability
• Switch Mode Power Supply
• PC
• Voltage Tolerance Curves

Voltage sags have emerged as one of the most serious power quality problem Voltage sag disturbances which sometimes last less than a fraction of second, can cause sensitive equipment such as personal computers (PC's) to shut down and interrupt PC controlled systems and processes for considerable periods of time, which leads to loss of production and high costs In order to overcome this problem, an electronic device to enhance the ride through capability of PCs during voltage sag is developed The proposed device can be connected to the power supply unit of PC to add a new operational state to the PC's power supply, in which PC is supplied for one second by a capacitor bank in the events of voltage sags It consists of sag detection circuit, control circuit, switching circuit and capacitor bank The device is easy to use and can be built from cheap, commercially available components Sonic of the salient features of the proposed device are that it does not require additional uninterruptible power supply for its operation, and it does not draw high levels of inrush current

• 出版日期2010-8