Speed Control of Three Phase Induction Motor Using Scalar Method and PID Controller

Abstract

This paper presents the speed control of a three-phase induction motor using the scalar control method with PID controller. The system maintains a constant volt to frequency ratio for any change in the load. We also used vector control method and bond graph to describe the motor model, as well as its behavior. Finally, we simulated the system using Labview, where the good results of using the scalar control technique are shown.

The Industrial IoT Control Design of Three Phase Induction Motor using Conventional V/F Method

“…On the other hand, the openloop scalar control is not robust against the disturbance. Addition of control method such as a proportionalintegral-derivative controller, fuzzy logic controller, sliding mode controller can be done in close-loop system shown in Figure 5 [23]- [24]. The proposed systems test has been done by measuring the rotor speed and the stator voltage.…”

Numerical Study of Constant Pressure Systems with Variable Speed Electric Pumps

“…There are different types of motors to drive pumps, but the induction motor is one of the most widely used because of the advantages it presents compared with other electric machines [11,14,27,28]. The accelerated advance of microprocessor systems and power electronics has made it possible to position variable speed drives as the main technology for motion control in applications driven by induction motors [10,29].…”

“…The most widely used scalar control technique is voltage-frequency (V/f) control, and vector control includes oriented field control and direct torque control [28][29][30]. Scalar control is less precise and presents a limited response in torque compared with other control techniques; it is simple to implement, it presents lower losses in switching, reduced computational processing, and a lower cost of implementation [4,11,12,14,30]. Some of the most common applications driven by the variable speed drive induction motor are pumps, compressors, fans, and small machines that operate at high speeds, but also, these types of applications require a strategy of simple control and moderate precision, so the V/f control is the most feasible in these cases [6][7][8].…”

“…In these applications, the scalar control strategy with a constant V/f ratio is the most feasible, mainly because of its simplicity and low-cost implementation [6][7][8]. There are several studies where scalar control with a constant V/f ratio was simulated for the speed control of an induction motor; for example, in an open loop with voltage and slip compensation to improve the performance in low frequencies [9], and adding a PID controller for automatic regulation in a closed loop to eliminate the speed position error [8,10,11]. The performances of the control system in the open and…”