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The main objective of static power converters is to produce an AC output waveform from a DC power supply. The output voltage waveform is not exactly a sinusoidal wave. Some ways should be found to improve the output voltage waveform. This paper introduces a method to minimize the total harmonic distortion (THD) of output voltage waveform in multilevel inverters. Steps amplitude of output voltage wave...
Different types of generators are used in wind farms including Synchronous and Asynchronous generators and Double Fed Induction Generators (DFIG). In Synchronous generator case, a power electronic circuit called a cyclo-converter is used as an interface to connect the generator to network. This circuit uses a DC-AC inverter with controllable switches that implies the proper and fixed amplitude and...
This paper presents the results of a simulation for synchronous motor speed control using a Direct Torque Control (DTC). This technique was object of a deep study for synchronous motor drives instead of precise closed loop speed control. However, this technique presents some problems such as, high influence of the motor parameters. The sliding mode controller is a model-based approach used to improve...
Most of rotor related faults in three-phase induction motors are due to broken rotor bars and end-ring defects. Nowadays Inductions motors are more frequently used with inverters which make the diagnosis process more complicated. Furthermore, some manufacturers of induction machines mount converters (i.e. rectifier and inverter) directly onto the machine, which makes the stator current unattainable...
Electrification is regarded as the mainstream for future automobile power-train in order to cope with the impending energy and environmental problems. The technology of electric vehicle (EV), including battery powered vehicle, hybrid vehicle and fuel cell vehicle, has been investigated thoroughly for more than two decades in China. Many remarkable progresses have been achieved. In this paper, the...
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