Projects

SENSORLESS SPEED CONTROL OF INDUCTION MOTOR USING VHDL/FPGA

This project presents the mathematical principles and algorithm
underlying a new sensorless control strategy for a three phase squirrel cage
induction motor. The control method comprises of two elements: the stator
current control strategy and sensorless speed control strategy both of them
based on equivalent 3-φR-L-e circuit where parameter are designed from
space vector model of the induction motor. The neural network algorithm is
used to generate 3-bit code associated with the output voltage generated by a
PWM inverter. The neural network size and architecture is determined based
on the necessary calculations precision and available hardware resemblance..
The motor controller structure developed in this project uses FPGA (field
programmable gate array) implemented neural network alongside pipelined
digital structure to carryout the computationally intensive task of controlling
the stator current. The use of specialized digital structure ensures fast
operation and allows speed control and current control algorithm to be
performed in parallel. The VHDL design for the three phase induction motor
and FPGA implementation are presented including simulation result.



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