industrial applications‚ due to its high efficiency‚ high ratio of torque-to-inertia ratio‚ high power factor‚ fast response and rugged construction .The PMSM has increasingly used in electrical vehicles ‚ aircraft‚ nuclear power station ship engines‚ robotic automation‚ escalators and industrial servo drives [5]. The control methods used for the permanent magnet synchronous motors are: V/f control‚ field oriented control and direct torque control [4]. Field oriented control was introduced to control
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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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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 as a wound rotor. Torque is produced in an induction motor assuming purely resistive impedances for the rotor conductors. However‚ the impedances of the conductors are not purely resistive. Because the conductors are embedded in iron‚ there is significant series inductance
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.....................85 Parameters and Function Blocks ............................................90 Applications ............................................................................96 Constant Torque Applications..................................................97 Variable Torque Applications.................................................. 101 Constant Horsepower Applications ...................................... 105 Multimotor Applications.....................................
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the vertical axis with an angular velocity . This system is in balance. The reaction R of the vertical post is R = mg. However there is a torque . It acts in the vertical plane XZ and its magnitude is mgr. It can be represented by a vector in +ve Y direction. Now‚ by Euler’s law‚ the rate of change of angular momentum is torque. Assume that the precession velocity is very small in comparison to spin velocity of the disk. The spin velocity may be written as ‚ where I0 is
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brushless machines offer a higher efficiency and torque density. By Z. Q. Zhu‚ Senior Member IEEE‚ and David Howe ABSTRACT | This paper reviews the relative merits of induction‚ switched reluctance‚ and permanent-magnet (PM) brushless machines and drives for application in electric‚ hybrid‚ and fuel cell vehicles‚ with particular emphasis on PM brushless machines. The basic operational characteristics and design requirements‚ viz. a high torque/power density‚ high efficiency over a wide operating
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to determine such properties as modulus of elasticity in shear and the torsion yield strength. During the experiment‚ aluminium and mild steel was used to demonstrate how the materials behave during the testing condition. By measuring the applied torque with respect to the angle of twist‚ the Torsional rigidity (GJ)‚ the Modulus of Rigidity (G) and the shear yield stress (τ) for ductile materials‚ mild steel and aluminium. INTRODUCTION The purpose of this experiment is to study and to compare the
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rigidity (G) and the shear yield stress (τ) for aluminium‚ mild steel and brass. The both ends of the cylindrical specimen are tightened to hexagonal sockets‚ which one is fixed to a torque shaft and another is fixed to an input shaft. By turning the input handwheel‚ the twisting moment has applied to produce the torque until the specimen fails. In the end of the experiment‚ it shows that the comparison of the behaviour of ductile and brittle materials under torsion. 1.0 Introduction The responses
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the torque‚ angle of twist relationship. REFERENCES: 1. Hibbeler‚ R. C. "Mechanics of Materials"‚ Prentice-Hall‚ 7th Edition. 2. Instruction Bulletin of Tecquipment Ltd. MATERIAL: Mild Steel rod 6 mm diameter over 3" length (overall length including hexagon ends = 5⅝"). EQUIPMENT: 1. Torsion testing Machine and Torsiometer of Tecquipment Ltd. 2. Steel rule and micrometer. THEORY: From the general torsion theory for circular specimen: T Gθ = J l where‚ T = Applied Torque; J =
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Chapter (9) Single-Phase Motors Introduction As the name suggests‚ these motors are used on single-phase supply. Singlephase motors are the most familiar of all electric motors because they are extensively used in home appliances‚ shops‚ offices etc. It is true that singlephase motors are less efficient substitute for 3-phase motors but 3-phase power is normally not available except in large commercial and industrial establishments. Since electric power was originally generated and distributed
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