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Development of renewable power generation systems (RPGSs) is continually increasing worldwide with Germany, China, Japan, Italy and the USA are the leaders contributing to the largest development in each region. Due to the increasing number of RPGSs connected to the utility grid, power quality, safe operation, and islanding protection of RPGSs are becoming important issues, among others. One of the...
The usage of the AC induction motor (ACIM) becomes widely increased in the industrial applications as well as domestic usage, due to the new technologies of the electronic switching technologies. The speed of the ACIM is achieved through the control of the frequency of the applied voltage to the IM, this is achieved by using the inverter, whose output frequencies lies between (20 and 60) Hz. The performance...
Direct torque control (DTC) is considered as the best alternative for permanent magnet synchronous (PMSM) drives. Classic switching-table based DTC has high torque and flux ripple due to the implementation of hysteresis control. Switching frequency can be made constant by replacing hysteresis control with space vector PWM (SVM) and requires mathematical modification on SVM input. Propotional+integral...
This paper presents the development of battery charger for charging series Li-ion batteries. It discusses the basic concepts of Li-ion battery charging such as the method of charging, cell balancing, charging control, monitoring, safety protection as well as the design constraints. The experimental results obtained are also presented
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