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A control strategy for a conventional Lundell alternator and an active-rectifier using different modulation schemes was proposed in previous work. The modulation techniques examined indicated that the system could operate more efficiently than a passive rectifier over a certain speed and power range. This paper extends the modulation scheme analysis using a SVM scheme with six commutations per switching...
It is desirable to measure rotor quantities such as currents and temperatures in an electrical machine for design verification and condition monitoring purposes. A Bluetooth module which sends data from the rotor was previously reported in literature, but this module was battery powered, and therefore the duration of the tests was limited. This study presents a solution to this problem by developing...
This paper presents a control strategy for a conventional Lundell alternator and an active-rectifier. The control scheme focuses on the minimisation of the stator copper losses of the alternator in an effort to maximise its efficiency. The modulation scheme of the active-rectifier is being investigated with the introduction of three different modulation techniques in order to quantify the effect they...
This paper presents low computation algorithms for single phase integration of permanent magnet generators associated with a wind turbine emulator test-rig. The grid synchronisation and grid side control are performed by Second Order Generalised Integrators (SOGI). A SOGI-FLL (frequency locked loop) was used for robust, accurate and low computation single phase grid synchronisation. Proportional-Resonant...
This paper presents a robust sensorless control scheme to control a permanent magnet generator associated with a wind turbine emulator test-rig. A Sliding mode controller was used for speed tracking regardless the wind speed profile used in the emulator. Two sensorless estimation algorithms, Sliding mode observer and extended Kalman filter, were implemented to calculate the rotor position and speed...
This paper presents a maximum power point tracking algorithm (MPPT) and sensorless control for permanent magnet generators associated with small scale wind turbines. The basis for the wind energy conversion is presented to model the wind turbine emulator test-rig and support the proposed MPPT algorithm. The maximum power point tracking algorithm is based on estimations of the load torque and shaft...
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