Induction Machines. The rotor windings of a three-phase induction machine can take two forms. The simplest‚ least expensive‚ and most rugged is known as a squirrel-cage rotor. It consists simply of bars of aluminum with shorting rings at the ends. The squirrel cage is embedded in the laminated iron rotor by casting molten aluminum into slots cut into the rotor. In the squirrel-cage induction machine‚ there are no external electrical connections to the rotor. The other type of rotor construction is known
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ultrasonic motor INTRODUCTION All of us know that motor is a machine which produces or imparts motion‚ or in detail it is an arrangement of coils and magnets that converts electric energy into mechanical energy and ultrasonic motors are the next generation motors. In 1980‚the world’s first ultrasonic motor was invented which utilizes the piezoelectric effect in the ultrasonic frequency range to provide its motive force resulting in a motor with unusually good low speed‚ high torque
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a force is generated when a current-carrying element is subjected to a magnetic field. In a cylindrical motor‚ the rotor rotates because a torque is developed when this force is applied at a given distance from the axis of the rotor. Most electromagnetic motors are rotary‚ but linear types also exist. In a rotary motor‚ the rotating part (usually on the inside) is called the rotor‚ and the stationary part is called the stator. The motor contains electromagnets that are wound on a frame. Though this
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“Ka pai ki mua‚ ka pai ki muri” A close viewing Analysis of Turangawaewae-a place to stand a New Zealand short film This is a close-viewing analysis of the short film turangawaewae - A place to stand. Directed by Peter Burger (Ngai Tauiwi). Produced by Catherine Fitzgerald (Ngai Tauiwi). Written by Wiremu Grace (Ngati Toa‚ Ngati Porou). Wi Kuki Kaa (Ngati Porou‚ Ngati Kahungunui) portrays a returned Maori servicemen from Vietnam. Nancy Brunning (Ngati Raukawa‚ Ngai Tuhoe) portrays his daughter
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Here we discussed in Detail about Wind Energy and the production of electricity from moving vehicles. So first we defined Energy. Till Now we have studied that energy is the ability of a body to do work .it can also be defined as the ability of a body to bring some change is the energy of that body. Energy is very necessary for human beings; every thing in the universe possessed some energy. There are two main kinds of Energy 1. Kinetic Energy 2. potential Energy Kinetic energy is produced
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Torque Optimization of the Interior-Permanent Magnet Synchronous Motors using Design Sensitivity Analysis Mohammadreza Hassan Zadeh1‚ Arash Kiyoumarsi2 1 Electrical Engineering Department‚ Abhar Islamic Azad University‚ Abhar‚ 22‚ Iran‚ phone: +98 281 3349816‚ e-mail: mrh_zadeh@qazviniau.ac.ir‚ 2 Electrical Engineering Department‚ Isfahan University Isfahan‚ Iran‚ Abstract. This paper presents a shape optimal design approach to reduce the torque ripple of the interior-permanent
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EE 2403 SPECIAL ELECTRICAL MACHINES 2 MARKS UNIT-I - SYNCHRONOUS RELUCTANCE MOTOR 1. What is synchronous reluctance motor? 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. 2. Define the characteristics of synchronous reluctance motor. The synchronous reluctance motor is not self starting without the squirrel cage. During run up it behaves as an induction
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eatur tures Features 1. Introduction. 2. Natural Frequency of Free Torsional Vibrations. 3. Effect of Inertia of the Constraint on Torsional Vibrations. 4. Free Torsional Vibrations of a Single Rotor System. 5. Free Torsional Vibrations of a Two Rotor System. 6. Free Torsional Vibrations of a Three Rotor System. 7. Torsionally Equivalent Shaft. 8. Free Torsional Vibrations of a Geared System. Torsional Vibrations 24.1. Introduction We have already discussed in the previous chapter that when
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Introduction Consider the numbers 1 2 3‚ how many combinations are there? 1x2x3=6‚ so there is 6 combinations‚ but how about using combinations and permutations to another level? How does Permutations actually affect our lives? One different combination would result in many other results such as the phone number. Imagine if a particular person’s phone number is 92719071‚ if i change the 1 at the end into 4‚ could you still call him? Or would you call another person instead? One time‚ there was
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commissioned by Andritz. The study was carried out at Fiber-Laboratory in Savonlinna. The work was divided into four parts. First part was the test of Dolphin D foil and Bump foil. Second part was the test of new foil with different position on the rotor. Third part was the test of three new foils which were designed from new original foil. Last part was the test of new HB foil. The purpose was to find out which one has the best condition for using in headbox screen of the paper machine. The data for
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