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Surface permanent magnet (SPM) machines operate with maximum output power for a given current when the induced voltage and the current are in phase. For an SPM generator this is obtained with a leading power-factor load. The inverter topology can achieve a leading input power-factor but this generally requires rotor position information. A lower-cost approach is to use a switched-mode rectifier (SMR)...
Phase advance modulation of a semi-bridge switched-mode rectifier (SMR) has been shown to produce greater power than conventional SMR modulation, at a lower cost than an inverter. This paper investigates how these power improvements are affected by two generator parameters: stator inductance and resistance. These parameters were investigated by a simplified simulation model, which used the boost converter...
This paper examines the application of phase advance modulation with a semi-bridge switched mode rectifier (SMR) previously used in automotive applications to small-scale wind turbines. Simulations and experimental testing are conducted to determine the optimal parameter selection with this modulation technique which results in increased output power while maintaining the phase current at its rated...
The dynamic performance of wind turbines indicates that the power extracted from the wind is strongly related to the inertia of the system and characteristics of wind speed. In this paper, a simulation model of a wind turbine system has been developed to study the effects of inertia. Three aspects of the dynamic performance of wind turbines are investigated in the paper: the prediction of the trend...
Small-scale wind turbines commonly use AC/DC converters such as rectifiers, switched mode rectifiers (SMRs) and inverters. Another power converter, the semi-bridge SMR has been researched for automotive applications, and is utilised by a number of small-scale wind turbine manufacturers. This paper applies a novel modulation technique developed for automotive applications of the semi-bridge SMR for...
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