Field-oriented control provides the advantages of smooth motion at slow speeds as well as the efficient operation at high speeds.In many motor drive systems, it is desirable to make the drive act as a torque transducer wherein the electromagnetic torque can nearly instantaneously be made equal to a torque command.
In such a system, speed control is dramatically simplified because the electrical dynamics of the driver become irrelevant to the speed control problem. There are numbers of permutation of this kind of control strategy, broadly known as Field Oriented Control, and these include stator flux-oriented, rotor flux-oriented and air-gap flux-oriented control. Within these types, there are direct and indirect methods of implementations.
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