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A new digital implementation of continuous-time ripple correlation control (RCC) for maximum power point tracking of photovoltaic (PV) panels. This implementation is straightforward and provides easy and convenient expansion to multiple-panel PV systems. The simple graphical user interface developed helps control and monitor the panels, with the options of manual control or RCC. Digital implementation...
In this paper, the effects of certain component faults on the performance of three-phase inverter-fed induction motors are analyzed under indirect field-oriented control. Simulations of faults in the current sensors, speed encoder, three-phase inverter, and motor are presented. Sample hardware faults verifying the simulation results are also presented. Performance requirements are set based on typical...
This paper introduces output power maximization of a regenerative braking system using ripple correlation control (RCC). The proposed RCC application thus leads to a reduction in the size of the battery pack in an electric vehicle. Results show that the proposed optimization can increase regenerated power by up to 20% compared to conventional regenerative braking systems. Time and frequency domain...
Indirect field oriented control (IFOC) and direct torque control (DTC) have been widely commercialized in induction motor drives, with each being favored by its supporters. In this paper, the dynamic performance of these drives for an electric vehicle application is examined, and sensitivities to parameter variations affecting this dynamic performance are explored. Key performance measures include...
This paper presents a survey of available techniques for minimizing power losses and input power of induction motors. The presented techniques serve different induction motor applications, including electric ship propulsion systems. Real-time techniques presented here are divided into three main categories: model-based methods that use the induction motor model, physics-based methods that search for...
Several techniques for analyzing and estimating power losses in insulated-gate bipolar transistors (IGBTs), diodes, MOSFETs, and other power electronics switching devices are known. Most of the approaches in the literature deal with periodic pulse width modulation (PWM) switching schemes. This paper presents a simple analysis tool to estimate these losses under aperiodic switching schemes, e.g. hysteresis...
Park equations in a rotor reference frame are used for sinusoidal back-electromotive force (EMF) permanent magnet synchronous machines (PMSMs) to eliminate the rotor-position dependency and create time-invariant model. However, Park equations are not suitable for non-sinusoidal back EMF cases. Instead, multiple reference frames are considered individually for each harmonic, with their rotation speed...
This paper elaborates on the application of ripple correlation control (RCC) to induction motor input power minimization. Simulations, hardware experiments, and frequency analyses verify that the direct component of the rotor flux in the synchronous frame (lambdaedr) can be adjusted to minimize the input power to the motor while maintaining the required output power. Motor characteristics are shown...
This paper introduces a new two-stage maximum power point tracking (MPPT) technique for multiple photovoltaic arrays operating under different levels of irradiance and temperature. The variations in such conditions could cause several local maxima on the overall power-current (P-I) curve of the arrays. This technique aims to locate the global maximum power point (MPP) on the P-I curve of the interconnected...
This paper includes an interactive wind farm design approach for Lebanon using geographic information systems (GIS). The procedure facilitates the process of locating a wind farm geographically, estimating its cost, and evaluating its generation capabilities. This paper uses Lebanon as a case study, and the procedure can be followed when similar necessary data are available for any other place. The...
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