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1、Induction Motor Tests Using MATLAB/Simulink and Their Integration Into Undergraduate Electric Machinery CoursesAbstractThis paper describes MATLAB/Simulink implementation of three induction motor tests, namely dc, no-load,nd blocked-rotor tests performed to identify equivalent circuitparameters. The
2、se simulation models are developed to supportnd enhance electric machinery education at the undergraduate evel. The proposed tests have been successfully integrated intolectric machinery courses at Drexel University, Philadelphia, PA,and Nigde University, Nigde. Turkey.Index TermsEducation, inductio
3、n motors, MATLAB/Simulink, software laboratory.I. INTRODUCTIONWITH THE advent of low-cost personal computers and various easily accessible software packages, computer-aided teaching tools have become an essential part of both classroom lectures and laboratory experiments in electrical machinery educ
4、ation 16. The computer models and simulations of induction motors, as teaching tools, support the classroom teaching by enabling the instructor, through the computer-generated graphics, to illustrate easily steady-state operation of themotor under various loading conditions . The computational tools
5、 as a part of laboratory experimentsenhance laboratory experience by providing students with the opportunity to verify the results of laboratory experiments and compare them with those obtained by computer simulations.Such a comparison opportunity helps students realize the limitations of hardware e
6、xperiments and, as a counterpoint, appreciate that computer models cannot substitute for actual hardware experiments that might not exactly represent the operation of induction motors because of some modeling assumptions.Moreover, an undergraduate electric machinery course that integrates up-to-date
7、 computer hardware and software tools in both lecture and laboratory sections also meets the expectationsof todays students who want to use computers and simulation tools in every aspects of a course, and thus, possibly attracts more students. Electrical machinery courses at the undergraduate level
8、typically consist of classroom and laboratory sections. The classroom section covers the steady-state operation of the induction motor in which the per-phase equivalent circuit is used to compute various motor quantities, such as input current and power, power factor, developed torque, and efflcienc
9、y. The computations associated with the steady-state operation require the knowledge of equivalent circuit parameters. These parameters are obtained by performing three tests, namely dc, no-load, andblocked-rotor tests on the motor in a typical laboratory experiment. The laboratory section includes
10、these tests and a load experment that allows students to become familiar with the inducion motor operation and to gain invaluable hardware and measurement experiences. The authors experience while teaching nduction motors at Drexel University, Philadelphia, PA, indicates that students generally have
11、 difflculty when they come to he laboratory to carry out these experiments even though the corresponding theory is extensively covered in the classroomsection with a detailed hand-out describing laboratory facilitiesand the procedure of the experiments, given to them at least a week before the labor
12、atory. Students are not familiar with a laboratory environment that contains large machines and relatively complex measurement methods and devices as compared with other laboratories they have been to before. The time constraints during the laboratory exercise are also a difflcult adjustment. In a u
13、sual two-hour laboratory section, students are required to set up and perform four induction motor experiments, to take the necessary measurements, and to investigate steady-state performance of the motor under various loading conditions. Because of the time limitations, students often rush through
14、the experiments in order to flnish them on time, which unfortunately prevents them from getting a true feeling of motor operation and rom appreciating what has been accomplished during the laboratory practice.Therefore, simulation tools must be developed for induction motor experiments to serve as u
15、seful preparatory exercises before students come to the laboratory. The objective of this paper is to present simulation models of these induction motor experiments in an effort to design a computational laboratory.The dc, no-load, and blocked-rotor simulation models are developed as stand-alone app
16、lications using MATLAB/Simulink and Power System Blockset (PSB) . For the load experiment, students are required to write a computer program using MATLABs M-flle programming for the per-phase equivalent circuit of the induction motor to compute operating quantities.Such an assignment improves students programming skills that would be helpful in other classes as well. The remainder of the paper is organized as follows. Section II describes the dc, no-l
