A DC motor is a mechanically commutated electric motor powered from direct current (DC). The stator is stationary in space by definition and therefore so is its current. The current in the rotor is switched by the commutator to also be stationary in space. This is how the relative angle between the stator and rotor magnetic flux is maintained near 90 degrees‚ which generates the maximum torque. DC motors have a rotating armature winding but non-rotating armature magnetic field and a static field
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The speed of an asynchronous motor rotating field and thus its rotor speed depends on the number of pairs of poles in the stator field .the rotor speeds n are lower than the table values by the amount of the relevant slip speed ns. Motors are designed with up to three stators windings‚ which have different number of pairs of poles. They can therefore run at up to pairs of poles. They can be in any desired ratio to one another. A pole-changing switch is used to changing poles for the desires speed
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Tesla Motors faces is the society and subcultures. In this day in age consumers worldwide have increased their knowledge and sensitivity about its environment. Numerous companies have catered to this need of becoming more environmentally responsible by offering products that are “green” or environmentally friendly. This new growth amongst people and organizations alike of becoming more environmentally conscious has created an opportunity for Tesla Motors with its brand of product. Tesla Motors produces
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Running head: GENERAL MOTORS Assignment #5 General Motors DeAndre Daniels Strayer University Financial Management FIN 534 Dr. Ron 06-September-2011 Summary This report discusses General Motors Corporation‚ one of the largest auto manufacturers globally‚ manufacturing cars and trucks in 34 countries and its subsidiaries. This assignment is an analysis of General Motors Corporation’s financial stability. It is hoped that these findings illustrate the strengths and weaknesses of the
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GROUP 4 JULY 26‚ 2013 EE 4101 ENGR. KENNETH F. FAJILAN Reluctance Motor Introduction A reluctance motor is a type of electric motor that induces non-permanent magnetic poles on the ferromagnetic rotor. Torque is generated through the phenomenon of magnetic reluctance. There are various types of reluctance motor: Synchronous reluctance Synchronous reluctance motors have an equal number of stator and rotor poles. The projections on the rotor are arranged to introduce internal flux “barriers“
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AC Motors vs DC Motors DC Motors Prof. Dr. M. Zahurul Haq zahurul@me.buet.ac.bd http://teacher.buet.ac.bd/zahurul/ Department of Mechanical Engineering Bangladesh University of Engineering & Technology e316.eps ME 475: Mechatronics AC motors are smaller in size‚ reliable and less costly. AC motors run at fixed speed set by the line frequency. Easy speed‚ torque & direction controls in DC motors. DC motors are generally operate at lower voltages which makes these easier to interface with control
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fluctuating factors that are likely to influence the organisations supply and demand levels and its costs. The ongoing changes occuring in society create an uncertain environment and have an impact on the fuction of the whole organization. Therefore PEST analysis is a useful tool for understanding the ’big picture’ of the environment in which Home Retail Group operates‚ and the opportunities and threats that lie with it. By doing this and looking at the outcome‚ we can take advantage of the oppurtunities
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Hyundai: Leading the Way in the Global Auto Industry 1. One huge competitive advantage of Hyundai is that they launched step by step‚ since the late 1990’s several factories and plants. In 1997 they established a factory in Turkey‚ later a plant in India and in 2002 was opened
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SWOT ANALYSIS When we talk about of strategic decision making in an organization‚ we must take consider many factors that must be studied within the company. For that‚ there are several useful tools such as SWOT analysis‚ which is meant (strengths‚ Weaknesses‚ opportunities‚ and Threats)‚ this method is the simplest and effective way to analyze the present and see how will be the future of the company. The main purpose of this analysis is to support the organization to locate the strategic aspects
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ELECTRIC MOTOR CONTROLS Once the proper motor is selected‚ understanding the many various control devices available and their uses and limitations becomes an important part related to reliable operation and protection of the motor and the personnel using the motor. Motor Control Topics There are four major motor control topics or categories to consider. Each of these has several subcategories and sometimes the subcategories overlap to some extent. Certain pieces of motor control equipment can accomplish
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