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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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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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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GENERAL MOTORS Contents: Introduction………………………………………………….. 2 Background of the Company…………………………. 2 Present Age GM……………………………………………. 5 Micro Environmental Factors………………………… 6 Macro Environmental Factors………………………. 10 Marketing Strategy………………………………………. 13 SWOT Analysis…………………………………………….. 15 Introduction: General Motors Company commonly known as General Motors or GM is an American company and is the world’s second largest automaker company. General Motors produces cars and trucks
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http://www.gm.com/company/about-gm http://www.samples-help.org.uk/mission-statements/general-motors-vision-statement.htm http://www.inc.com/resources/startup/articles/20050201/missionstatement.html http://en.wikipedia.org/wiki/History_of_General_Motors#Corporate_restructuring http://www.scribd.com/doc/23232458/GM-Competitive-Advantage-and-Market-Analysis-PDF William Pelfrey (2006) “Billy‚ Alfred and General Motors” New York‚ NY. AMACON
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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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SWOT analysis of General Motors This is a General Motors Company SWOT analysis for 2013. For more information on how to do SWOT analysis please refer to our article. Company background General Motors Company (GM) is a corporate that designs‚ builds and sells cars and trucks. Name Industries served Geographic areas served Headquarters Current CEO Revenue Profit Employees Main Competitors General Motors Company Automotive Worldwide U.S. Daniel Akerson $ 152.3 billion (2012) $ 4.9 billion (2012)
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GENERAL MOTOR At the new General Motors‚ they are passionate about designing‚ building and selling the world’s best vehicles. This vision unites of GM as a team each and every day and is the hallmark of their customer-driven culture. Based on an article published by Uncommon Thought in 2005‚ one of the biggest concerns relating to the day to day operations of General Motors was the increasingly erratic cost of fuel. Because GM relies on a steady supply of fuel for transportation of their vehicles
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Tesla motors has taken a different approach in EV technology and I think its paying off. Though the challenges from the establish competition would be thrown in coming years and to maintain the differentiation would be tough which will reduce the capability to charge the premiums‚ hence the scale needs to be achieved for sustainability; the mass adoptability of EV would be the key and for that the Auto manufacturers needs to work hard under the federal support. Tesla Motors has positioned
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