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Stability is a major concern for dc distribution systems because the integrated system may become unstable even though the subsystems are stable individually. Significant analysis and design has been applied to dc voltage distribution systems, while stability and related control design are not well studied for dc current distribution systems, especially for the scenarios with long transmission cables...
In under-sea dc power distribution systems, constant current feed is preferred over constant voltage feed for robustness against long distance cable impedance. The input voltage of each power converter module in a series connected dc power distribution system varies over a wide range as a function of the load power. This behavior brings unique challenges to maintaining zero voltage switching (ZVS)...
Constant current dc distribution to series connected loads has been preferred for long distance high reliability systems such as undersea cabling for telecommunications and observation networks. In addition, some loads require constant current output, creating a need for high efficiency power supplies that provide a regulated current gain from input current to output current. Series resonant converters...
Constant current distribution systems such as under-sea power distribution systems use power converters with a constant input current as a source of input power. This paper analyzes minimum requirements for passive zero-voltage-switching (ZVS) components of dc-dc series resonant converters (SRCs) in dc distribution systems. A steady state analysis of the technique shows that the input voltage varies...
Applications such as under-sea power prefer dc current distribution in a series cable connection instead of dc voltage distribution due to the long distance and cable loss. Power converter modules employed in these scenarios have a constant current input. In this paper, steady state analysis and unique design considerations are presented for the series resonant converter topology with constant current...
Applications such as undersea power prefer constant current dc distribution in a series trunk cable connection over dc voltage distribution in order to provide robustness against cable impedance and faults. Power converter modules employed in these architectures are connected in series and have a constant current input. In this paper, steady state analysis and a control strategy are presented for...
Traditional in-motion (dynamic) wireless power transfer (WPT) is based on elongated power transmitting tracks. It suffers from low efficiency, having complex and not fully utilized magnetic structures, among other drawbacks. In the case of lumped transmitter coils commeasurable in size with the receiver coil, which has been recently proposed for the in-motion WPT, the power transfer is intermittent...
Emerging Wireless Power Transfer (WPT) technology employed to dynamically charge Electric Vehicles (EVs) has the potential to overcome the limitations of EVs by extending vehicle driving range, making them lighter and less expensive. However, while moving over road-embedded pads during a regular driving and charging routines, the vehicle energy storage system is exposed to short-duration, high- energy...
Matrix converters inherently have problems with commutation which are generally mitigated by using snubbers. Problem of commutation also places a limitation on their voltage transfer ratio. In this paper, a new high frequency linked AC-AC converter topology is proposed which ensures reliable commutation, taking care of parasitic inductances, with minimum snubber on the input side. A simple switching...
This paper proposes new method of operating BLDC motor which extends operating speed beyond the limit set by conventional 120° conduction mode of operation, without field weakening and having same inverter dc bus voltage. Concepts of Phase Extension mode and Ultra High Speed mode are introduced. Also in the paper it is shown that the proposed ‘phase extension’ mode of operation can produce additional...
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