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Consensus based distributed robust adaptive finite-time secondary voltage control is designed for inverter-based islanded AC microgrids. The design combines decentralized local states information with the states of the neighboring distributed generators with directed communication topology. Robust control algorithms are used locally for each distributed generator to deal with uncertainty. Lyapunov...
Soft magnetic composite (SMC) material is a relative new soft magnetic material which has undergone the substantial development during last decades. Especially with the low-pressure pressing on the mold, the magnetic core with SMC of the machine can be fabricated easily and the manufacture cost can be reduced greatly. By using this technology, a claw pole machine (CPM) with SMC core was designed and...
With the great concerns on alleviating the pollution on the environment and traffic congestions; there is a trend for developing the electric vehicles [1], [2]. For such drive system, the in-wheel machines draw the main attention due to its relative higher torque density and compact structure [1]. With the permanent magnet (PM) located on the stator teeth, the flux switching permanent magnet machine...
This paper presents a new photovoltaic (PV) micro-inverter topology. The topology is based on a partial power processing resonant front end dc-dc stage, followed by an interleaved inverter stage. The input stage provides high efficiency, and flexibility of design for wide input voltage range and the output stage provides an effective switching ripple of twice the PWM frequency, which reduces the output...
Novel topologies of switched flux permanent magnet (SFPM) machines with mechanically movable flux adjusters (FAs) for either all or alternative stator poles in order to extend the operation speed range are developed and analysed in this paper. Compared with the FAs which are located outside all of the stator poles of SFPM machines (all FAs), the alternative stator pole FA structure (alternative FAs)...
A significant challenge in wireless sensor networks is the transmission of data from a large number of nodes to a central collection point. This is commonly called converge-cast communication. At present, the IEEE 802.15.4 and ZigBee standards are widely used in the design of wireless sensor networks. The latter standard defines a methodology for converge-cast communication in tree-based network topologies...
An adaptive-threshold-voltage differential pair and a low-voltage source follower using independent-double-gate-(IDG-) FinFETs are proposed for a low-voltage operational amplifier (op amp). These circuits were implemented by our FinFET technology that enables co-integration of connected-DG- (CDG-) and IDG-FinFETs. The proposed components enable a two-stage op amp to accept the input below the nominal...
This paper deals with the assessment of the vulnerability of the transmission grid under extreme contingencies, including a terrorist threat or an exceptional natural disaster. It proposes a two-step screening-and-ranking approach to find the dynamically most disruptive disturbances created by multiple-line outages. In the screening step, critical transmission lines are selected according to the sensitivities...
The paper discusses the development of a Bluetooth based information exchange network (BIEN). The network is based on the Bluetooth scatternet idea and governed by set of additional rules that helps regulating the information traffic. The architecture has been prototyped and tested on a typical network. Early investigation to the throughput on different piconet and scatternet size has yielded good...
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