Environmental pollution and fossil fuels restriction have led scientists and industries to use green and renewable energies. The conventional cars account for a large part of the fuel consumption and, therefore, make a significant damage to environment. In the recent decade researchers have been trying to find sustainable alternatives in terms of energy. Due to their capacity for using more than one source of energy, hybrid vehicles seem to be a viable solution. In electrical vehicles (EVs), hybrid electrical vehicles (HEVs) and fuel-cell vehicles the main challenges are to achieve high efficiency, ruggedness, small size and low costs in power converters, electrical machines as well as in associated electronic. An electrical machine working in motor and generator mode in EVs or HEVs has an important duty to provide the proper energy. Hence, determining the type of machine and its drive system is a crucial to achieve the appropriate power. The switched reluctance (SR) machine is a low cost machine with simple construction and high robustness. Moreover, SR machine can operate in a vast speed range and it is effective at low operating speeds. Due to these characteristics, SR machines could be of benefit in using of main power provider in EVs and HEVs. SR machines have a nonlinear behavior in their operation. As a result, the designation of control system and power converter is critical to the efficiency of SR machines. The literature on SR machines control is ample and many people have proposed numerous power converters thereof. When the switched reluctance generator (SRG) operates as a battery charger in EVs or HEVs the charging current ripple is important protecting the battery package and its life time. The output current of SRG depends on control strategy and its power converter. In this dissertation, the combination of bidirectional converter by asymmetrical half bridge (AHB) converter is used to drive SRG in battery charging usage. In addition, after determination of best switching angles for SRG phases in simulation tests, a novel online control approach is presented. At the end, the experimental equipment including bidirectional converter, asymmetrical half bridge converter and the DC machine drive has been provided. The proposed online control method is implemented on TMS320F28335 to control the bidirectional and AHB converters. The DC machine drive system is used for speed control performed by ATMEGA32. Finally, simulation results and experimental results are presented in different operating condition to demonstrate the effectiveness and applicability of the combined converter strategy and the proposed control strategy. Keywords: SRG, Power Converter, Control Strategy, Battery Charger
