24-07-2017, 09:46 AM
I want the ppt for my seminar"sliding mode controler for induction motor drive"
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project report on vector control of induction motor
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I want the ppt for my seminar"sliding mode controler for induction motor drive"
29-07-2017, 10:18 AM
Vector control, also called field-oriented control (FOC), is a variable frequency drive (VFD) control method in which the stator currents of an AC three-phase electric motor are identified as two orthogonal components that can be visualized with A vector. One component defines the magnetic flux of the motor, the other the torque. The converter control system calculates the corresponding current component references from the flow and torque references provided by the drive speed control. Proportional-integral controllers (PI) are typically used to keep current components measured at their reference values. The pulse width modulation of the frequency inverter defines the transistor switching according to the stator voltage references which are the output of the current controllers PI.
FOC is used to control AC induction and synchronous motors. It was originally developed for high performance motor applications that are required to operate smoothly across the full speed range, generate full torque at zero speed and have high dynamic performance including fast acceleration and deceleration. However, it is becoming increasingly attractive for low-performance applications, as well as due to the size of the FOC engine, the cost and superiority of reducing power consumption. It is expected that with increasing computational power the microprocessors will eventually shift almost universally the scalar control of a single volt variable per Hertz (V / f).
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