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This paper presents the fuzzy pre-compensated PI (FPPI) speed controller for permanent magnet brushless DC (PMBLDC) motor drive. Various aspects of DSP based implementation of PMBLDC motor drive system such as inverter, position and current sensing, reference current generation and PWM current control are discussed in detail. The fuzzy logic algorithm used in this work particularly suitable for digital control because of the simplified way of handling the rule base and considerable reduction of computation during defuzzification process. Transient performance of the drive system obtained using FPPI speed controller is compared with the conventional PI speed controller.

This paper presents important experimental findings on a novel 2-winding single phase self-excited induction generator (SEIG) through extensive experimentation. The performance of the generating unit has been critically evaluated in terms of voltage, frequency consistency, efficiency and sensitivity to realistic parameters. These results are expected to assess its suitability for practical application towards standby power generation. These results would guide on the needed requirements in the system.

This paper deals with the design and development of a photovoltaic (PV) array fed cage induction motor for an isolated water pumping system. A drive system using a chopper circuit to track power from the PV for different solar and a current controlled voltage source inverter (CC-VSI) to optimally match the motor to PV characteristics is presented. The model equations governing interaction of torque and flux producing components of motor current with available solar power is developed for the operation of the system at optimum efficiency. Performance of the system is presented for different realistic operating conditions, which demonstrates its special features for applications such as solar water pumping system, solar vehicles and flour mills located in hilly and isolated areas,.

This paper describes an experimental study carried out on a permanent magnet brushless DC (PMBLDC) motor drive coupled to a pump load powered by a photovoltaic (PV) array for water pumping system applications. A simple low-cost prototype controller has been designed and developed without current and position sensors which drastically reduces the overall cost of the motor drive system. This controller is used to test the dynamic behavior of the PMBLDC motor drive system. A mathematical model of the system is developed with a view to carrying out a comparison between the experimental and simulated response of the drive system. The necessary computer algorithm is developed to analyze the performance under different conditions of varying solar insolation for a pump load. The developed state-space equations are simulated to obtain the performance characteristics which are also verified by conducting a suitable experiment on the developed PV pumping system.

This paper deals with the reduction of overall cost of a current controlled voltage source inverter fed vector controlled induction motor drive (VCIMD). For this purpose an attempt has been made here to examine the possibility of such elimination/reduction in the number of sensors. The performance analysis of the VCIMD system (22 kW cage induction motor) is carried out and with the help of simulated results the effectiveness of the proposed elimination/reduction of sensors is assessed.