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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Local Motors: Designed by the Crowd‚ Built by the Customer Case Study Analysis Table of conten Table of content 2 Introduction 3 Local Motor’s business model vs. “typical” models 3 The CANVAS model 3 Customer Segments 3 Value propositions 3 Channels 4 Customer Relationships 4 Revenue Streams 4 Key Resources 4 Key Activities 5 Key Partnerships 5 Cost Structure 5 Evaluation of the business model 5 Customer involvement according to NIKE 6 “LM template” in the clothing industry 7 References
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TATA MOTORS I. INTRODUCTION Tata Group is an Indian multinational company headquartered MUMBAI‚ MAHARASHTRA‚ INDIA. Tata group business is spread across 7 sectors their main sector being steels. Their empire is spread across 6 continents and has its presence in 80 nations. The combined market capitalization of all the 31 listed Tata companies was $89.88 billion as of March 2012.Tata group gets its major revenue from overseas market contributing 58%. Tata Motors Limited is an Indian multinational
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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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Problem Definition John Bridges‚ the chief electrical engineer of Hamilton Oil Company‚ has concluded through motor testing that DMC competitors Spartan Motors and the Universal Motor Company of Canada offer the first and second choice motors on the market‚ respectively. DMC’s position as the third choice could prove quite detrimental to its market share because Hamilton is the largest active oil company in Canada‚ operating over 30% of producing wells‚ and Bridges is extremely influential in
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INTRODUCTION GROWTH OF MOTOR INSURANCE Vehicle first appeared on the roads in United Kingdom (UK) during 1880’s‚ but the first motor insurance is issued during 1890’s. Therefore it is almost 10 years time people use a motor vehicle as a mode of transportation without insurance coverage. Therefore‚ through their (insurer) experiences on other classes of insurance such as fire‚ theft & liability‚ they introduce the motor insurance towards the use of transportation. Then they emphasis it (motor insurance) on
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Table of Contents: 1. BACKGROUND 3 2. TYPES OF COVERAGE 3 3. TYPES OF MOTOR INSURANCE POLICIES 4 3.1. MERCHANDISE INSURANCE 4 3.2. CARRIER LIABILITY INSURANCE 8 3.3. VEHICLE INSURANCE 9 3.4. THIRD PARTY LIABILITY INSURANCE 12 3.4.1. THIRD PARTY LIABILITY INSURANCE IN ROMANIA 12 3.4.2. INTERNATIONAL THIRD PARTY LIABILITY INSURANCE 14 4. GREEN CARD 16 5. BAAR - ROMANIAN MOTOR INSURERS’ BUREAU 17 6. UNIFORM AGREEMENT 21 7. INTERNAL REGULATIONS 26 8. AUTO INSURANCE PRODUCTS IN ROMANIA
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EXPLAINING THE BASICS OF MOTION MN1205 TABLE OF CONTENTS TYPES OF MOTORS . . . . . . . . . . . . . . 3 OPEN LOOP/CLOSED LOOP . . . . . 9 WHAT IS A SERVO . . . . . . . . . . . . . . 11 COMPENSATION . . . . . . . . . . . . . . . 13 TYPES OF CONTROLS . . . . . . . . . . . 15 TYPES OF FEEDBACK DEVICES . 17 TYPES OF ACTUATORS . . . . . . . . . . 22 Page 2 Servo Control Facts TYPES OF MOTORS The direct current (DC) motor is one of the first machines devised to convert electrical energy to
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Chapter 1 kin 4315 1.The dynamic systems theory of motor control is able to account for the four characteristics of human movement through the process of: none of the above 2. The reflex theory of motor control cannot account for which characteristic of human movement uniqueness 3. Open-loop motor control relies on sensory feedback to guide the completion of the movement. False 4. One weakness of the reflex theory of motor control is that: it cannot explain how humans can perform unique
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