An Improved FPGA Implementation of Direct Torque Control for Induction Machines

摘要: This paper presents a novel direct torque control (DTC) approach for induction machines, based on an improved and stator flux estimator its implementation using field-programmable gate arrays (FPGA). The DTC performance is significantly by the use of FPGA, which can execute algorithm at higher sampling frequency. leads to reduction ripple estimations. main achievements are: 1) calculating discrete integration operation backward Euler approach; 2) modifying so called nonrestoring method in complicated square root estimator; 3) introducing new sector determination method; 4) increasing frequency 200 kHz such that digital computation will perform similar analog operation; 5) two's complement fixed-point format minimize calculation errors hardware resource usage all operations. design was achieved VHDL, Matlab/Simulink simulation model. Hardware-in-the-Loop used verify functionality FPGA estimator. results are validated experimentally. Thus, it demonstrated drives achieve excellent high