Analytical modelling of the linear switched reluctance motor with segmental translator
Because of similar structure and operation principles, the linear switched reluctance motor (LSRM) has all advantages of rotary switched reluctance motor. Also, segmental translator LSRM (STLSRM) has the capability to produce higher output power/weight when it is compared with the conventional LSRM. Due to the high advantages of the STLSRM, electromagnetic modelling of this motor is considered in this study. By the direct solution of the field equations, an analytical model is introduced for the STLSRM by which the static characteristic of flux-linkage with a phase for various phase currents and different translator positions is determined. Having this static characteristic, dynamic analysis of the motor is then carried out based on the phase voltage equation to predict the phase current and instantaneous thrust waveforms. Due to the high speed of the developed model, it can be utilised appropriately for the initial sizing of the machine where accuracy can be traded with time-saving. Applying the proposed analytical model to a typical three-phase STLSRM, simulation results are presented and they are validated using the finite element (FE) calculations.