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We experimental validated a Hierarchical Controlled Software Defined Networks Architecture for IP over Optical Transport Network. OpenDayLight is chosen as the basic SDN controller for our extensions. Our implementation includes interaction between controllers and three function module extensions inside OpenDayLight to control the optical network. An successful experimental of end to end dynamic connection...
The high-speed switching of SiC MOSFET allows power converter to operate with higher frequency and lower switching loss. However, it tends to aggravate dv/dt effect due to the impact of parasitic parameters, resulting in shoot-through and high device stress in the half bridge configuration. In this study, a compact and high-speed gate driver is developed and optimized for SiC half bridge module. The...
A centralized and unified control mechanism is proposed to merge heterogeneous optical networks into Software-Defined Optical Network (SDON) for dynamic and efficient service delivery. The proposals are experimental demonstrated via a completely extended controller based on Opendaylight (ODL) Project.
This paper evaluates different passive filter topologies of the grid-connected high power density converter (HPDC) for the purpose power quality control and electromagnetic interference (EMI) reduction. The harmonics generated by the switching circuits in the HPDC affect power quality at lower frequency as well as EMI at higher frequency. Various common passive filter topologies are carefully evaluated...
Cooling systems significantly contribute to the total mass and/or volume of power electronic systems especially for aerospace application where it will directly increase the operating cost of the aircraft. This paper investigates the heat sink parameters that contribute to the thermal resistance as well to weight of the high power density converter. The lowest heat sink thermal resistance for any...
This paper presents a design methodology for high power density converter (HPDC) operating as an AC aircraft bus provider, which presents a particular gravimetric power density challenge. High power rating 3-phase AC-DC converter design with weight minimization is elaborated. By considering sizing of major converter parts that contribute to total converter weight, optimal switching frequency to yield...
This paper focus on the routing, modulation level and spectrum allocation (RMLSA) problem in the next generation datacentre networks, which own the advantages of both Elastic Optical Networks (EON) and Software Defined Networking (SDN). We proposes an Integer Linear Programming (ILP) model for this problem. Simulation results show the ILP model achieves an outstanding load balancing performance.
IoT (Internet of Things) is a promising technology to bring a boom of reform, including the combination of wireless communication technology, embedded system, mobile application and cloud technology. Although the IoT technologies have improved a lot over these years, most of them focus on single intelligent product rather than the integration of the IoT network. In this paper, a centralized management...
We propose an AWGR and SOA based scalable optical packet switch architecture with modular structure and highly distributed control scheme for data center networks. Numerical results show this architecture can achieve high throughput with low blocking probability and latency.
In present work, micro-channel heat sink (MCHS) is integrated inside direct bond copper (DBC) for power electronics cooling. Based on commercial CFD code ANSYS Fluent, micro-channels are designed in back Cu-layer of DBC substrate with liquid water as coolant. Two advanced cooling structures, including double-layer (DL) and double-side (sandwich) micro-channel, are investigated. The sandwich structure...
Thermal management of lithium ion battery is a crucial aspect in holistic battery management system (BMS), and the real-time estimation of internal thermal distribution in each battery cell is the key to successful thermal management. In this paper, a physics-based thermal-electrochemical model integrated with actions of electrode reaction, joule heating, heat conduction and heat convection is developed...
The behavior-based electro-thermal models for commercial SiC Schottky diode and SiC MOSFET have been developed for circuit simulator PSpice over a wide range of temperature. The Foster RC network is used for thermal modeling and coupled with the electrical modeling by the interaction between power loss and junction temperature. Based on the measurement and parameters extracted from datasheet, both...
In applications of distributed power generation and uninterruptable power supply for green and smart buildings, energy storage systems (ESS) with high voltage DC bus have been widely considered. Advanced energy storage device (ESD) such as lithium-ion batteries and super-capacitors however have low terminal voltages. Connecting many ESD cells in series is an acceptable solution but requires complex...
In applications of modern power distribution with distributed energy resources, grid-tied energy storage systems (ESS) will be increasingly incorporated. Energy storage devices (ESD) such as lithium-ion battery or super-capacitor cells however have low DC terminal voltages. It is essential to develop a bidirectional DC/AC converter to interface ESS based on low voltage cells to the higher voltage...
A sandwich packaging structure of SiC power module for HEV application has been designed and numerically investigated by CFD study. The design has a micro-channel heat sink integrated in the back Cu-layer of DBC substrate. Doubleside cooling is adopted and liquid coolant (ethylene glycol, 105 °C) flows in opposite directions in the two heat sinks. Compared with wirebonding packaging, the proposed...
This paper proposes an ILP model for integrated-layer routing and resources assignment in MLR IP over OTN networks. The model solution obtains 23% cost reduction compared with the separate layer one through simulation experiments.
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