The Induction Motor and other Alternating Current Motors

The increasing complexity in the development and manufacturing process of internal combustion engines leads to a higher demand for more effective testing and monitoring methods. Cold engine testing becomes progressively the main End-of-Line test which is used nowadays from automotive engine manufacturers with the purpose of determining the integrity of engine assembly. The present work is focused on the development of a detailed physics-based, lumped-parameter, dynamic model of a single cylinder internal combustion engine coupled with an alternating current transient dynamometer for cold engine testing applications. The overall transient engine test cell model is described based on a two-inertia system model consisting of the engine, the dynamometer and the coupling shaft. The internal combustion engine is modelled based on First Law of Thermodynamics and Second Newton’s Law for rotational bodies. The transient dynamometer is actually an alternating current three-phase induction motor which is modelled according to direct-quadrature axis approach, and its drive unit which is responsible for controlling the speed of the motor using indirect field orientation scheme. The engine and dynamometer are connected through a coupling shaft which is modelled as a compliant member with damping. The model is validated against experimental measurements such as engine cylinder pressure, engine excitation torque and alternating currents of the induction motor. All of the experimental measurements were recorded from an identical single cylinder transient engine test cell using a highly advanced instrumentation system. The described model serves as an ideal platform for developing innovative model-based fault detection and diagnosis techniques for cold engine testing applications. In conclusion, this is presented successfully for two simulated fault cases, a process fault and a sensor fault, proving the functionality and usefulness of the model.

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3-phase Alternating Current (ac) Induction Motor Sequential Controller: an Instructional Apparatus

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.a2318.059120 ◽

2020 ◽

Vol 9 (1) ◽

pp. 2470-2474

Keyword(s):

Induction Motor ◽

Alternating Current ◽

Real Field ◽

Laboratory Instruction ◽

State University ◽

Bachelor Of Science ◽

Technology Students ◽

Skill Test ◽

Island State ◽

Ac Induction Motor

Technology education would require high quality, effective laboratory instruction which involves manipulation of instructional apparatuses. Instructional apparatuses provide students to experience the real field of work. However, due to its inadequacy in the electrical technology laboratory, the instructors experienced difficulty of providing the skills to the students particularly on motor control which involves complex designing and installation that needs a skillful and technically-knowledgeable person. In the interest of alleviating this problem, the researchers design an instructional apparatus that address the needs of the electrical technology students. This study aimed to assemble and assess the performance of the 3-Phase Alternating Current (AC) Induction Motor Sequential Controller and find out its effectiveness as an instructional apparatus. Moreover, it finds out its acceptability level in terms of performance, convenience of use, safety, assembly and cost. This was conducted in Bohol Island State University–Calape, Bohol in the Academic Year 2015-2016 for the improvement of instruction in electrical technology. The respondents of the study were the third year students of Bachelor of Science in Industrial Technology, major in Electricity and Technical Experts from BISU system. This study made use of experimental methods of research specifically one group pre-skill test and post-skill test design in developing the apparatus and testing its effectiveness in enhancing the skills of the students. The descriptive design was used in determining the acceptability level of the apparatus supplemented with observation guide to measure its performance level. The result of the study revealed that students’ performance using the apparatus was increased by 52.24%. The acceptability level of the apparatus was rated very high by the respondents, obtaining the average weighted mean of 3.62. The result showed that the apparatus is suitable to be utilized in the electrical technology as a tool for instruction. The researchers highly recommend utilizing the apparatus as a tool for instruction in electrical technology laboratories.

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