Abstract
In this paper, we are interested, in a first time, at the study and the implementation of a V/f control for induction machine in real time. After, We are attached to a comparison of the results by simulation and experiment for, speed responses, flux and currents of the real machine, with a DSPACE card and model established by classical identification (Direct Current test , blocked-rotor test, no-load test , synchronous test), to ensure the validity of the established model. The scalar controlled induction motor allows operation of the motor with the maximum torque by simultaneous action on the frequency and amplitude of the stator voltage, with conservation of the ratio V/f. Speed reference imposes a frequency at the inverter supplying the voltages needed to power the motor, which determines the speed of rotation. The maximum torque of the machine is proportional to the square of the supply voltage and inversely proportional to the frequency voltage. So, Keep V/f constant implies a operating with maximum constant torque. The results obtained for the rotor flux and the stator currents are especially satisfactory steady.
Highlights
INTRODUCTIONThe speed control of electrical machine aims to control the operating point of the group "Engine - Load" to best meet the needs of a given industrial application
The speed control of electrical machine aims to control the operating point of the group "Engine - Load" to best meet the needs of a given industrial application.This multidisciplinary field currently experiencing considerable importance in industry and in research and requires varied skills in the field of electrical engineering.Recent progress in the areas of power electronics, automation and digital control led to the development of control system of high performance [1...7].Today, alternating current machines can replace the direct current machine in most variable speed applications
We focus on the modeling of induction machine in a reference frame linked to the rotating field
Summary
The speed control of electrical machine aims to control the operating point of the group "Engine - Load" to best meet the needs of a given industrial application. The resulting model is widely used in the stationary regime, that is to say, the machine is assumed to operate at steady regime and powered by a three phase system of constant effective value and rotates at constant speed This model is no longer valid if the machine is powered by a three-phase inverter controlled using a control algorithm. This led us to check the validity of this model by comparing the responses in speed, currents and flux of the induction motor obtained by simulation in the Simulink environment with those obtained in real time experimentation. The scalar control is the easiest control of speed of the induction motor; it allows varying the speed of the machine over a wide range This is one of the first commands, developed for the variable-speed driving.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
