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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1.1 INTRODUCTION It is a true fact that if the customers are satisfied then the recommended to others. Word of mouth and customer satisfaction play a very important role in determining market perception about automobiles. Market perception determines the success of a company and so it is very important for the car manufacturers to measure the “willingness of existing users of a product to recommend it to others”. Car is one of the products which is purchased most significantly by Indian households
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Dell’s benefit programs are key to Dell’s Winning Culture and Rewards Strategy. Dell’s benefit plans are designed to maintain and enhance employee productivity and further Dell’s operational goals by assisting employees as they plan for major life events‚ such as illness‚ disability‚ retirement and death. Dell ties benefit program design and costs to market median; however‚ "Employee Perceived Value" may be above market. Benefits are appropriate rather than cash compensation when: Required from a
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CIPD Foundation in HR and LD Practice Learning resources 4DEP Developing yourself as an effective human resources or learning and development practitioner Here are some suggestions for suitable resources for this unit. The list is indicative only and should not be considered as prescriptive or exhaustive. Essential reading 1. CURRIE‚ D. (2006) Introduction to human resource management: a guide to personnel in practice. London: Chartered Institute of Personnel and Development. (New edition:
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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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466-512 Jay Shin Ford Motor Company Background/Introduction: Henry Ford started the company on June 16‚ 1903‚ with 11 business associates and $28‚000 in capital. Ford first came out with the Model A in order to provide affordable car to large population. With such effort‚ Ford’s production of Model T increased from 20‚277 on 1910 to 585‚388 in 1916 cutting the price down by more than half‚ $420. In 1919‚ the Fords purchased all outstanding shares for $105‚820‚894‚ making Ford Motor Company a family-owned
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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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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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