Performance Analysis of Classical Converter Using Different Control Strategies for Switched Reluctance Motor with Dynamic Loading

Among the researchers, switched reluctance motor (SRM) is generating a lot of interest as it is a permanent magnet-free motor which significantly differs from the other polyphase machines. Due to the absence of brushes, windings, and permanent magnet on rotor, its structure is lightweight. Other than the structure, it has many other attractive characteristics suitable for variable speed applications. Special applications include aerospace, renewable and electric vehicle (EV). Lack of reserves of permanent magnet and continuous rise in its price are forcing motor manufacturers to look for an alternate motor which does not require permanent magnet. SRM is the best alternate solution to mitigate these challenges. Performance of SRM drive depends on the type of power converter and control technique used. Over the years, many converters have been developed and analyzed; among those, asymmetric bridge converter gives the highest performance in terms of independent switch control, good fault tolerance capability, and easy power regeneration. This paper represents the simulation of 7.5 kW, 8/6 pole, four-phase SRM using asymmetric bridge converter with current hysteresis chopping and pulse-width modulation (PWM) technique for dynamic load. Asymmetric bridge converter with current chopping or hysteresis current control offers better performance in terms of current as it is limited to 35 A under the range of peak current and appropriate speed–torque for dynamic loading.