Full Speed Range Position Sensorless Control Strategy of IPMSM
In order to realize the full-speed domain operation of the interior permanent magnet synchronous motor(IPMSM)without position sensor system,an improved IPMSM composite control strategy is pro-posed.Firstly,the high-frequency rotating voltage injection method is selected to achieve the estimation of rotor position and speed in the zero-low speed domain;secondly,in the medium-high speed domain,in or-der to weaken the system buffet caused by the switching function in the conventional sliding mode observ-er,a new super-twisting algorithm sliding mode observer is constructed to improve the observation accuracy of the system.Finally,an evolutionary algorithm is introduced to optimize the coefficients in the transition speed domain to achieve reasonable switching between different observation methods,to complete the high-precision identification of rotor position and speed in the full-speed domain.The research results show that the proposed algorithm can achieve full-speed domain operation of the motor with good dynamic performance.
interior permanent magnet synchronous motorposition sensorlessrotating high frequency voltage injectionsecond order sliding mode observerdifferential evolution algorithm
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