TY - JOUR
T1 - A novel design of line-interactive uninterruptible power supplies without load current sensors
AU - Pai, Fu Sheng
AU - Huang, Shyh Jier
N1 - Funding Information:
Manuscript received September 9, 2004; revised June 9, 2005. This work was supported in part by the National Science Council of Taiwan, R.O.C., under Contract NSC92-2213-E-006-085. F.-S. Pai is with the Department of Environment and Energy, National University of Tainan, Tainan 710, Taiwan, R.O.C. S.-J. Huang is with the Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan, R.O.C. (e-mail: clhuang@ mail.ncku.edu.tw). Digital Object Identifier 10.1109/TPEL.2005.861188
PY - 2006
Y1 - 2006
N2 - In this paper, a new approach for the design of line interactive uninterruptible power supplies (UPS) without load current sensors is proposed. Based on the interactive structure, this system is constructed that includes the power factor improvement capability in anticipation of increasing the quality of supplying power. With the employment of such an approach, the power converter can be adaptively operated at the active power filter mode or backup mode, by which the power can be supplied to the connected load very reliably. Moreover, as the proposed circuit needs only one current feedback signal where the load current sensors can be saved, the circuit design can be thus simplified significantly. In order to confirm the effectiveness of this proposed design, the approach has been tested through the theoretical analysis and experimental validation under different test scenarios. Test results help support the feasibility and practicality of the method for the application considered.
AB - In this paper, a new approach for the design of line interactive uninterruptible power supplies (UPS) without load current sensors is proposed. Based on the interactive structure, this system is constructed that includes the power factor improvement capability in anticipation of increasing the quality of supplying power. With the employment of such an approach, the power converter can be adaptively operated at the active power filter mode or backup mode, by which the power can be supplied to the connected load very reliably. Moreover, as the proposed circuit needs only one current feedback signal where the load current sensors can be saved, the circuit design can be thus simplified significantly. In order to confirm the effectiveness of this proposed design, the approach has been tested through the theoretical analysis and experimental validation under different test scenarios. Test results help support the feasibility and practicality of the method for the application considered.
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U2 - 10.1109/TPEL.2005.861188
DO - 10.1109/TPEL.2005.861188
M3 - Article
AN - SCOPUS:33947151523
SN - 0885-8993
VL - 21
SP - 202
EP - 210
JO - IEEE Transactions on Power Electronics
JF - IEEE Transactions on Power Electronics
IS - 1
ER -