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The use of the Internet has become very important in our daily life. Therefore, the quality of the network is becomes very important. There are several protocol and technology in the Internet network. In this paper we analyzed Multi-Protocol Label Switching (MPLS) compared to Non MPLS. We compared the throughput, packet loss, and Jitter. We used the tools such as Iperf, Wireshark and routing table...
This paper presents a new implementation of flyback-type inverter to optimize power flow from solar PV (photovoltaic) system. The flyback-type inverter used is Shimizu topology. The main features of this inverter type include: extended lifetime of the inverter, provide small volume, lightweight, lower harmonic content and stable AC current injection into the load or utility line. Three controllers...
When integrating multiple sources to supply power to a single load, it is necessary to ensure that excess power available from a single source does not flow into the other sources. This is commonly done with OR diodes placed for each source being used. Despite its simplicity, this protection method suffers apparent efficiency loss through the diodes, especially when large current is involved. This...
Brushless DC (BLDC) motors have been applied extensively in household and industrial scale because of the advantages such as high efficiency and low mechanical losses because it does not use a brush such as DC motors. Application of the BLDC motors use rectified AC source to minimize battery usage. However, the use of BLDC motors and rectifying circuit causing poor power factor and facing harmonic...
This paper proposes new step-up DC-DC converters with high ratio capability. The proposed DC-DC converters are derived using combination of boost converters and buck-boost converters. A high ratio capability is achieved by parallel input and series output combination so that the efficiency is better than the one that is achieved by using a conventional boost converter. A method to reduce the input...
Induction motor speed control was relatively difficult, because the generated torque and flux are related or not free. In addition to adjusting the speed, it required inverter control. The inverter output was not a pure sinusoidal signal but it is the result of the switching. Therefore, it was necessary to be able to fix the method of switching the inverter output signal that can adjust induction...
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