Comparison of field oriented and field acceleration methods of induction motor control

Since Blaschke proposed Field Oriented Control (FOC) in 1972 [1], which enables one to control an induction motor like a separately excited dc motor, there has been a great deal of additional research on this method. It has been verified that excellent dynamic performance of induction motors can be achieved with FOC. Many industrial companies have produced ac motor controls applying this method. In 1981, another method for control of the induction motor was proposed by Yamamura in Japan called the Field Acceleration Method (FAM) [3]-[8], but no computer simulation or experimental results have been reported on this method. This paper provides digital computer simulation results which show that equivalent transient response to a step change in torque command can be achieved with either FOC or FAM.