Systems‚ Man‚ and Cybernetics‚No.3‚ PP.28-44‚1973. [2] N.T. M. Mohan Undeland and W.P.Robbins‚ "Power Electronics Converter‚ Applications and Design" john Wiley & Sons Inc. Canada‚ 1989. [3] L. Tang‚ M. F. Rahman‚ “A new direct torque control strategy for flux and torque ripple reduction for induction motors drive – a Matlab/Simulink model‚” IEEE International Electric Machine and Drives Conference‚2001‚pp.884-890. [4] Bimal K. Bose‚Modern Power Electronics and AC Drives‚ Prentice Hall‚ 2002. [5]
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> upthrust A ruler of length 0.30 m is pivoted at its centre. Equal and opposite forces of magnitude 2.0 N are applied to the ends of the ruler‚ creating a couple as shown. 2.0 N 50° ruler pivot 50° 2.0 N What is the magnitude of the torque of the couple on the ruler when it is in the position shown? A 0.23 Nm B 0.39 Nm C 0.46 Nm D 0.60 Nm Compiled nd rearrnged by Sjit Chandra Shakya 3 weight < drag 2 4 A ball falls from rest through air and eventually
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SCREWS Anjori Grover Vasesi ------------------------------------------------- SCREWS ------------------------------------------------- Introduction A screw‚ or bolt‚ is a type of fastener characterized by a helical ridge‚ known as an external thread or just thread‚ wrapped around a cylinder. Some screw threads are designed to mate with a complementary thread‚ known as an internal thread‚ often in the form of a nut or an object that has the internal thread formed into it. Other screw threads are
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the WRX STi and Evo are both great buys. They are both great cars because they produce a lot of power and torque‚ drivability of each car is very easy‚ and they both look good inside and out. First‚ the STi comes with a horizontally opposed‚ EJ20 engine that puts out an impressive 300 hp and 300 lb-ft of torque. While on the other hand‚ the Evo comes with 271 hp and 273 lb-ft of torque. So‚ right off the bat both cars are going to get you from point A to point B much a lot quicker. With all
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ELECTRIC POWER UTILISATION AND ENERGY AUDITING UNIT – I ILLUMINATION‚ HEATING AND WELDING Nature-of radiation –definition – laws photometry – polar curves – lighting calculationsdesign of illumination systems (for residential‚ industrial‚ commercial and street lightings) - types of lamps-energy efficiency lamps. Methods of heating requirement of heating material-design of heating element-furnaces – Welding generator-welding transformer and its characteristics UNIT - II ELECTRIC TRACTION
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A direct current (DC) motor is a fairly simple electric motor that uses electricity and amagnetic field to produce torque‚ which turns the motor. At its most simple‚ a DC motorrequires two magnets of opposite polarity and an electric coil‚ which acts as an electromagnet. The repellent and attractive electromagnetic forces of the magnets provide the torque that causes the DC motor to turn. If you’ve ever played with magnets‚ you know that they are polarized‚ with a positive and a negative side. The
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Seatwork 1. An aluminum tube is rigidly fastened between a bronze and steel rod as shown. Axial loads are applied at the position indicated. Determine the stress in each material. 2. Two bars are equal length but different materials are suspended from a common support‚ bar A supports 200lbs and bar B supports 2000lbs‚ if the cross sectional area of bar A is 0.00015ft2 and bar B is 0.015ft2‚ compare the strength of bar A and bar B in psi. Assignment 1. A timber shown in figure with
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For Mr D Clare Harper Adams Engineering Dept 1. Summary. 3 2. Introduction. 4 3. Electric Drive 5 4. Efficiency 7 5. Variable Frequency Drive (VFD) 8 6
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Production of magnetic flux A rotating magnetic field in the stator is the first part of operation. To produce a torque and thus rotate‚ the rotors must be carrying some current. In induction motors‚ this current comes from the rotor conductors. The revolving magnetic field produced in the stator cuts across the conductive bars of the rotor and induces an e.m.f. The rotor windings in an induction motor are either closed through an external resistance or directly shorted. Therefore‚ the e.m.f induced
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The Fate of Dental Implants without Primary Stability: An Experimental Study in Sheep. Abstract Background and objectives: Primary implant stability is considered necessary for achieving and maintaining osseointegration. The purpose of this experimental study was to know what will happen if we place implants without primary stability both clinically and radiographically. Method: Two adult sheep (3-4 years of age)‚ 70 kg in weight‚ were included in the study. After sedation and local anesthesia the
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