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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life will be better. In Henriquez’s novel‚ a character named Arturo Rivera moved in the United States with his wife Alma and daughter Maribel. The reason for them moving to the United States is to seek medical attention for their daughter who got in an accident. Arturo and his family didn’t only sacrifices their comfortable life but also‚ he left his well paying job and work as a minimum wage worker. In the conversation that Alma and Arturo had‚ it says: “‘Do they know about your experience? You could
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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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on the rotor. For a three phase generator‚ the windings of each phase of the armature are displaces by 120 degrees from each other around the inside periphery. The field winding is a coil which carries dc current and hence produces constant magnetic field. Besides the armature and the field windings there is another winding called the damper winding that is present on the rotor .The damper winding is a physically closed coil whose purpose is to provide damping to the oscillations in the rotor. Under
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choice other than leaving Guatemala. Their father Arturo is a simple peasant who picks coffee for a living‚ and their mother is a housekeeper. Since Guatemala is governed by corrupted military‚ simple people have no rights and often live in very poor conditions. In fact‚ simple people are almost completely dependent upon the rich. Arturo joins a group of people to form something like a labor union‚ but they are all betrayed by a member‚ so Arturo and others are killed and Arturo’s wife "disappears
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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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