AC Induction Motor (ACIM) is the workhorse of industrial and domestic applications, due to its simple construction and durability. Control of the ACIM can be achieved by a simple open-loop control technique using the conventional Volt-Hertz method. But, when dynamic responses are required, it is essential to use a closed-loop control technique to reduce high current transients. The aim of this paper is to design a closed-loop control of ACIM using SVPWM technique and compare the performance with the conventional method. This is implemented by using dsPIC to control the drive, as it provides higher efficiency and lower operating costs, (i.e.) it reduces the cost of the drive components. Keywords: AC induction motor, SVPWM, dsPICI.INTROUCTIONThe AC induction motor (ACIM) is the workhorse of industrial and residential motor applications due to its simple construction and durability. These motors do not have brushes that could wear out or magnets that could increase the cost. The rotor assembly is a simple steel cage. ACIMs are designed to operate at a constant input voltage and frequency, but you can effectively control an ACIM in an open-loop variable speed application if the frequency of the motor input voltage varies. If the motor is not mechanically overloaded, it will operate at a speed roughly proportional to the input frequency. As you decrease the frequency of the control voltage, you must also decrease the amplitude by a proportional amount. Otherwise, the motor will draw excessive current at low input frequencies. This method of control is called Volts-Hertz control. In practice, a custom Volts-Hertz profile is developed to ensure that the motor operates correctly at any speed setting. This profile can take ...... middle of document ...... evaluated in Figure 1. Coordinate transformations Through a series of coordinate transformations, the time-invariant values ​​of torque and flux can be indirectly determined and controlled with classic PI control loops. . The process begins by measuring the currents of the three-phase motors. In practice, you can take advantage of the constraint that in a three-phase system the instantaneous sum of the three current values ​​will be zero. So by measuring just two of the three currents you can know the third. Hardware cost is reduced because only two current sensors are required.IV. CLARK TRANSFORMATIONFig.2 Clark TransformationThe first transformation involves going from a 3-axis, 2-dimensional coordinate system referenced to the motor stator to a 2-axis system also referenced to the stator. The process is called Clarke transformation, as shown in Figure 2.V. TRANSFORMATION OF THE PARK