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The Engineering Design Process (PDF)

   

Added on  2021-04-24

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Running head: ENGINEERING DESIGN ASSIGNMENTENGINEERING DESIGN ASSIGNMENTName of StudentName of UniversityAuthor Note

1ENGINEERING DESIGN ASSIGNMENTWhat is the paper all about?The paper discusses about the core loss of induction motor and how important it is forthe businesses to measure the core loss as induction motors are one of the most electricalenergy consuming machines and they consume huge amount of power i.e approximately 69%of total electricity consumed by industrial sector companies. The paper also informs aboutvarious types of losses of induction motor and the process of no load testing by which coreloss is determined (Che, Hang Seng, et al). The three methods to execute the test for core losshas also been discussed in the paper which are thermal test, no load test and variable load testat rated conditions also has been discussed along with the(Drif, M'hamed, and Antonio J.Marques Cardoso). The various methodology of core loss determination is also mentioned.The paper also includes circuit diagram of no load test. The parameters of no load test arealso included (Zhou, Dehong, Jin Zhao, and Yang Liu). The formulae to calculate windagelosses and the graphs of input power and applied voltage have also been provided. Theprinciple aim of the paper is to calculate the loss characteristics of induction motor(Shi, Pu, etal.). The paper mainly described the processes of measuring “Rational losses”( Huang,Ziyuan, et al). Dependence over the no-load test and various parameters like no-loadresistance, impedance, reactance, and magnetizing current per phase and core-loss current oneach phase is derived in the paper (Chatterjee, Debashis). The graphs and practicalarrangements of the tests and finally the formulae which were applied also been discussed.The graphs have been plotted based on the values obtained from the experiments. The valuesof loss elements and its values are also derived in the paper from the calculations.In what aspect, the paper enhance the understanding of theElectrical Machines ?The paper focuses on the core-loss of induction motors. It also specifies theimportance for the businesses to determine the core loss of the induction motors as itconsumes huge amount of electricity. The concept of core loss is important for understandingof electrical machines. The iron loss or core loss consists of two kinds of losses that is eddycurrent loss and hysteresis loss (Longbiao, Li). Eddy current loss occurs whenever there is arelative motion between Conductor and Magnetic Field. Since, of the relative motion anelectromotive force (emf) is induced in the Conductor itself according to Faraday’s Law ofElectromagnetic induction. Since the material is a conducting material like iron, these EMFs

2ENGINEERING DESIGN ASSIGNMENTcirculates currents within the body of the Conductor (Dubas, Frederic, and Akbar Rahideh).Eddy current is defined as “The resistiveloss occurred in electrical machinesthat transformsome forms of energy, such as kinetic energy, into heat (Hamzehbahmani, Hamed, et al).This Joule heating reduces efficiency of iron-core transformers and electric motors and otherdevices that use changing magnetic fields.”These circulating currents are called EddyCurrents. When these current flow into the core of induction motor they produce losses andknow as eddy current loss (Handgruber, Paul, et al). The paper helps to understand theefficiency of electrical machines like three phase induction motors. The paper gives ideaabout hysteresis loss as well, which is defined as “the loss when a part of electro magnetizingforce Hysteresis loss is due to the reversal of magnetization of transformer core whenever itis subjected to alternating nature of magnetizing force .Whenever the core is subjected to analternating magnetic field, the domain present in the material will change their orientationafter every half cycle. The power consumed by the magnetic domains for changing theorientation after every half cycle is calledhysteresis loss”. Hysterisis loss is a permanent typeof loss(Steentjes, Simon, et al.). The paper enhances the understanding of eddy current lossand how it is reduced using lamination of core of three phase induction motor and otherelectrical machines (Wang, Likun, et al.). It also calculates and shows graph of windage losson no load test data. The loss elements i.e stator copper loss, loss due to rotation, friction andwindage loss(Kiyota, Kyohei, et al.), core loss with its value has been calculated in the paperwhich gives idea about the efficiency of three phase induction motor(Mohammadi, Sajjad,Mojtaba Mirsalim, and Sadegh Vaez-Zadeh).Were there any future issues that the authors were concerned orwould address later ?The loss characteristics of the induction motor though has been discussed but the testcan be done in future which will improve in better understanding of the loss characteristics ofan three phase induction motor. The test can be further performed in future to develop lossinformation.The stator copper loss is derived from the data obtained from current that is statorrated and the winding of three-phase induction motor offers the total resistance. The threetypes of losses that is, copper, and friction and winding loss can be determined after runningthe power test as well as no load test. With no load the motor gets operated and rated voltage

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