Abstract
For charging battery pack in electrical vehicles need large and expensive devices and circuits, to reduce the volume and prices, it is possible to use the structure of an integrated battery charger with converter and electrical machine. Due to the simplicity of switched reluctance machine's structure and lack of magnet and winding on the rotor, this machine is an attractive option for use in integrated battery chargers. Due to growing use of electrical vehicles and use of city's electricity grid to provide energy, it is necessary to correct power factor in battery chargers. In multi-phase excitation that occur when battery pack is charging, should attention to inductance changes induced by mutual induction and core saturation and due to inductance variations, current must be controlled to prevent the rotor movement. In this study, current margin is selected for phase current and thermal analysis is considered to prevent rising temperature and exceed the winding insulation class, so used copper losses minimization method for minimizing winding temperature in multi-phase excitation.
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