Development of on line single phase uninterruptible power supply (UPS) for low power application
Uninterruptible Power Supply (UPS) is an electrical apparatus that provides emergency power to a load when the input power source (fro m main utility) fails to deliver electric power. The purpose of this paper is to show development of an o n-line mode single phase UPS that suitable for 240 V (A...
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| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Published: |
2011
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/2369/ http://eprints.uthm.edu.my/2369/1/91.pdf |
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| Summary: | Uninterruptible Power Supply (UPS) is an electrical apparatus that provides emergency
power to a load when the input power source (fro m main utility) fails to deliver electric
power. The purpose of this paper is to show development of an o n-line mode single
phase UPS that suitable for 240 V (A C), 50 Hz type of electrical appliances, esp ecially
for personal computers or low power electrical appliances. The advantage of the online mode of UPS is there is no transfer time during the transition fro m normal to backup modes. The design consists of battery charger/ rectifier module, inverter module and
battery. One of the important components used is IC NE555 and the function is to
generate pulses and control the frequency of inverter. Proteus 7.1 SP2 software is used
to simulate the designed circuits. The UPS is developed with output specification, 240
V (A C), 50 Hz. The developed UPS has been tested on a personal computer and
successfully provides backup power up to 400 W for about 15 minutes. Therefore, the
developed UPS is able to provide temporary backup electric power for critical
electrical appliances when outage condition occurs. |
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