uniform air gap is shown in Figure Q1(c). The mutual inductance between the rotor and the stator is given by Lsr = 0.5 cos θ Henries The windings are supplied with either of two sources: Source A: Source B: 3 A DC 6 A r.m.s f = 50 Hz The rotor is locked at θ = 50°. What is the torque developed for the following source connections: (i) (ii) Source A to both windings Source A to the rotor and source B to the stator. Rotor axis [6 marks] [7 marks] θ = 50° (locked) Stator axis Figure
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Malaysia. (n.d.). About TM: Corporate Responsibility. Retrieved May 20‚ 2010‚ from http://202.71.108.103/about-tm/crm/education.asp Telekom Malaysia Telekom Malaysia. (2009). Annual Report. Retrieved October 5‚ 2010 Thailand Infrastructure Annual Report Zita‚ K. (n.d.). Malaysia Telecom Brief. Retrieved October 5‚ 2010‚ from Network Dynamic Associates LLC: http://www.ndaventures.com/Malaysia_Telecom_Brief.pdf ZTE Corporation [ 2 ]. [ (Kumar‚ 2010) ] [ 3 ] [ 4 ]. [ (Loong‚ 2006) ] [ 5 ] [ 6 ]. [ (Cisco
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hHelicopter Definition: A helicopter (or chopper‚ helo or whirlybird) is a type of rotorcraft in which lift and thrust are supplied by rotors. This allows the helicopter to take off and land vertically‚ to hover‚ and to fly forwards‚ backwards‚ and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft would usually not be able to take off or land. The capability to hover efficiently for extended periods of time allows a helicopter to
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control systems‚ robotics‚ mecatronics‚ electric vehicles‚ high speed transportation etc. SYNCHRONOUS RELUCTANCE MOTORS * A reluctance motor is a type of synchronous electric motor which induces non-permanent magnetic poles on the ferromagnetic rotor. * Torque is generated through the phenomenon of magnetic reluctance. Operating principle * Whenever a piece of ferromagnetic material is located in a magnetic field a force is exerted upon the material tending to bring it
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be familiar with some of the terminology associated with it. The rotor is the spinning component that has wheels and blades attached to it. The blade is the component that extracts energy from the steam. There are two basic types of turbine designs. One is called the "impulse" design in which the rotor turns due to the force of steam on the blades. The other is called a "reaction" design‚ and it works on the principle that the rotor derives its rotational force from the steam as it leaves the blades
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corresponds to a physical position of the rotor. The frequency is exactly determined by the formula f = RPM x p / 120 where f is the frequency (Hz)‚ RPM is the rotor speed (revolutions per minute) and p is the number of poles formed by the stator windings. A synchronous generator is essentially the same machine as a synchronous motor. The magnetic field of the rotor is supplied by direct current or permanent
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with fuel and ignited by the ignition system. The combustion is a constant process that heats and expands the released gases before they reach the two-stage axial turbine. The gases clash on the turbine blades‚ which causes a rotation of the common rotor shaft. After the gases leave the turbines they flow into the APU exhaust and are released in the open
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Ceremony of the assembly Meanwhile Mr. Danilo Villanueva ( Audit Staff) led the Invocation and followed by the National Anthem. 11- SPEECHES/ REMARKS BOARD OF DIRECTOR’S PRESIDENT‚ ARTURO C. BALLICUD delivered his welcome address. He emphasized in his remarks that the commitment of NORSAMELCO is to address the reliability of the transmission system in the entire province of Northern Samar to deliver quality electric service to the
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actually Venezuela is suffering one of the biggest economic recessions due to the dependency of petroleum in its economy. According to Arturo Uslar Pietri in his article “Sowing the Oil‚” the only profitable use of the petroleum’s incomes is investing them in other technologies‚ which could be alternative fuels‚ and other economic sector as tourism and agriculture. Also‚ Arturo Uslar Pietri claimed that basing the world economy in oil would create a monopoly and enrichments of only a few countries meanwhile
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quick for a one-off product. Moulded fibreglass blades are usually better for batch production. Wooden blades will last for many years. Introduction Blades These plans describe how to build two sizes of machine. The diameter of the larger wind-rotor is 8 feet [2.4 m]. The smaller machine has 4’ diameter [1.2 m]. The diameter is the width of the circular area swept by the blades. page 2 DIAMETER Furling system The plans include a description of how to construct a furling tail for
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