data without disassembly the machine. The Motor Current Signature Analysis (MCSA) is considered the most popular fault detection method now a day because it can easily detect the common machine fault such as turn to turn short ckt‚ cracked /broken rotor bars‚ bearing deterioration etc. The present paper discusses the fundamentals of Motor Current Signature Analysis (MCSA) plus condition monitoring of the induction motor using MCSA. I. INTRODUCTION T he operators of induction motor drives
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present in many household items. The brushed DC motor consists of a rotor (the part that rotates) containing several coils of wire. This is attached to the output shaft. The rotor is surrounded by a magnetic field (this is usually a permanent magnet‚ but can be an electro magnet). Electrical connection to the rotor is accomplished via a device called a commutator. A commutator is basically a conductive ring that rotates with the rotor shaft. This ring has been split into segments (there are as many
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people ’s feelings . Unlock all the doubts ‚ the following details about the hammer crusher at work when the principle . A wide range of hammer crusher in construction is basically the same ‚ a few large backbone structure is an important case ‚ rotor‚ hammer ‚ sieve four categories‚ this seemingly simple structure part in the their work when their duties‚ they easily reached truly hammer broke purposes. Cabinet‚ all of this should be the biggest part of the structure ‚ itself‚ in addition to the
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Give some example of everyday vibrating object. which exhibit SHM‚ at least approximately? 1. The pendulum on an old clock. 2. A guitar string after it gets plucked 3. The vibrations of the little quartz crystal in a digital watch. 2. toys called Newton’s cradle 3. the motion of a piston in an engine and 4. the vibrations of the atoms in a solid. 5. A micromass particle of light exhibits SHM.The Reason is that it oscillates without any mass changes during its motion. Is the acceleration
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2060 IEEE TRANSACTIONS ON ELECTRON DEVICES‚ VOL. 39‚ NO. 9‚ SEPTEMBER 1992 Micromotor Fabrication Mehran Mehregany‚ Stephen D. Senturia‚ Member‚ IEEE‚ Jeffrey H. Lang‚ Member‚ IEEE‚ and Pradnya Nagarkar Abstract-This paper presents a detailed discussion of micromotor fabrication and related critical issues. The micromotors under study are of the variable-capacitance side-drive type with salient-pole and wobble (harmonic) designs. Polysilicon surface micromachining forms the basis of the
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[8] Gorelov DN. Analogy between a flapping wing and a wind turbine with a vertical axis of revolution. Applied Mechanics and Technical Physics 2009;50:297–9. [9] Gorelov DN‚ Krivospitsky VP. Prospects for development of wind turbines with orthogonal rotor. Thermophysics and Aeromechanics 2008;15:153–7. [10] Islam M‚ Ting DSK‚ Fartaj A. Aerodynamic models for Darrieus-type straightbladed vertical axis wind turbines. Renewable and Sustainable Energy Reviews 2008;12:1087–109. [11] Eriksson S‚ Bernhoff
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caliper‚ brake pads‚ a rotor‚ and a hub. The following is a basic description of a disc brake’s mechanism. 1. When the brake pedal is pressed‚ the brake fluid is forced to enter the caliper cylinder where the piston is sitting in. In turn‚ that fluid pushes the piston‚ which is attached with a brake pad on the other end‚ toward the rotor. 2. Once the brake pad is in contact with the rotor‚ the caliper contracts to bring the other brake pad to contact with the other side of the rotor as well. The pushing
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parts of all steam turbines are similar‚ consisting of nozzles through which steam flows and expands (dropping in temperature and gaining kinetic energy) and the blades against which the swiftly moving steam exerts pressure. The blades are mounted on rotor drum‚ and an outer casing confines the steam to the turbine. Both temperature and pressure fall as the steam passes through the turbine. The greater the pressure drop‚ the more energy can be captured from the steam. The more efficient power plants
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the differences between the two basic types of ac generators. 3. List the advantages and disadvantages of the two types of ac generators. 4. Describe exciter generators within alternators; discuss construction and purpose. 5. Compare the types of rotors used in ac generators‚ and the applications of each type to different prime movers. 6. Explain the factors that determine the maximum power output of an ac generator‚ and the effect of these factors in rating generators. 7. Explain the operation of
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shaft‚ which causes it to accelerate or decelerate‚ depending on the direction of the unbalance. As the rotor changes speed‚ the relative rotor angle changes. Fig. 2 shows the relationship between the rotor (torque) angle δ‚ the stator magnetomotive force (MMF) F1‚ and the rotor MMF F2. The torque angle δ is the angle between the rotor MMF F2 and the resultant of the vector addition of the rotor and stator MMFs R‚ as shown in Fig. 2 Abstract— Due to increase of electric power demands‚ power systems
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