# Block Diagram Of An Induction Motor Drive System Closed Loop Vector Controlfig

This post categorized under Vector and posted on June 11th, 2018.

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Fig block diagram of open loop vf control induction motor induction motor drives implement vectore vector pwm vsi drive simulink closed vf based speed file speed control methods various types motors a scalar controlled figure 7 the closedloop slip matrix sixstep inverter fed drive case studies (power system blockset) . starting motors Vector control also called field-oriented control (FOC) is a variable-frequency drive (VFD) control method in which the stator currents of a three-phase AC 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 control system of the drive The Field-Oriented Control Induction Motor Drive block represents a standard vector or rotor field-oriented control drive for induction motors. This drive features closed-loop speed control based on the indirect or feedforward vector control method. The speed control loop outputs the reference electromagnetic torque and rotor flux of the

Fig. 1 V to f Drive Control System Block Diagram. The modulator converts the voltage and frequency demand into the necessary pulses to drive the IGBTs in the inverter. The measured currents are used to protect the motor and drive by reducing the frequency or tripping the drive as required.Vector control also called field-oriented control (FOC) is a variable-frequency drive (VFD) control method in which the stator currents of a three-phase AC 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 control system of the drive But in case of IFOC rotor flux vector is estimated using the field oriented control equations (current model) requiring a rotor speed measurement. Among both schemes IFOC is more commonly used because in closed-loop mode it can easily operate throughout the speed range from zero speed to high-speed field-weakening.

Demand for low-cost robust motor drives has spurred increased use of sensorless vector control of induction and BLDC motors in everything from consumer products to industrial applications in myriad sizes and power ratings. Sensorless vector control also known as field-oriented control outputs performance comparable to that of a motor drive