Research On Parameters Identification Algorithm Of Induction Motor And Its Design Based On FPGA

Induction Motor is one of the most widely used actuator for industrial applications due to its advantages such as reliability,simplicity, low cost and volume manufacturing. However induction motors is a multi-variable, non-linear, highly coupled system. Vector control can solve the induction motor torque and flux of decoupling, and achieved excellent control performance. However, with changes in the operating conditions, the changes of induction motor parameters especially electrical parameters effect the controll effort of vector control system seriously , the changes of rotor resistance undermined the decoupling between flux and torque, which made Motor control more difficult. Therefore online identification of induction motor rotor resistance is of great significance to improve performance of induction motor vector control system.In this paper various control strategies of indution motor rotor parameter identification in the recently years is synthesised and analysised, detailed nature of induction motor dynamic mathematical model, through the coordinate transformation , given out different induction motor mathematical models in different coordinate system. Based on the rotor magnetic field orientation and rotation coordinates, vector control system is introduced and established vector contoll simulition model based on Matlab and do research on effects of the rotor resistance change of system performance.Based on this research, research on intelligent identification of induction motor rotor resistence theories is done based on Model Reference Adaptive theory (MRAS) .This paper analyses the problems of traditional MRAS,with reactive power model, with fuzzy control technology, design rotor resistance identification strategy based on fuzzy model reference adaptive system and rotor resistance MRAS intelligent identifier based on the neural network. In the paper do simulation of the identification strategies in the paper and prove the effectiveness of the strategies, and based on FPGA technology, use SG simulation tool , the identification of the rotor resistance hardware implementation has been discussed and laid the foundation for industrial applications of induction motor rotor resistance.