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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FREE LEGAL AID INTRODUCTION India is a modern state that has accepted the concept of ’welfare state ’. Hence it has to work for the welfare of the general public. It is the function of the State to establish a just social order by enacting just laws and by providing equal opportunity to all to grow. Every Government is constituted to respond to the needs and aspirations of the people and to remove social inequalities among its citizens. This promotes social justice among poor and the downtrodden
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Case 2 Tata Motors 1. Describe the economic characteristics of the global motor vehicle industry. The 2008 financial crisis began in the American subprime mortgage crisis‚ eventually evolved into a global financial crisis. Most countries because of the impact of the financial crisis‚ leading to a sharp slowdown in consumer’s vehicle demand. Also‚ because of the financial crisis‚ the global motor vehicle industry experienced a full-scale market competition. Some small car companies to be phased
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SISTEMAS DC Motors Catedrático: Ing. Gustavo Mendoza Leal Alumno: Alfredo Valdés Cárdenas Introduction A DC motor is a type of electrical machine that converts direct current into mechanical power by means of a magnetic field. DC motors are widely used in field applications because of their many advantages over AC motors such as speed control‚ high starting torque‚ quick starting‚ stopping‚ reverse and acceleration and free from harmonics found in AC. Applications of DC motors include but
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scenario changed bicycle was transformed into a fast‚ stylish and trendy mode of transport known as Motorcycle‚ now-a-days known as Motorbike. The topic of the project is “Marketing Strategies adopted by automobile industry taking TVS Motors for comparison.” TVS Motor Company is one of the leading bike manufacturers in India. For the study‚ secondary data is collected from business newspaper‚ magazines‚ company brochures‚ journals and the Internet. The major conclusion from this study was that TVS
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CASE ANALYSIS - DOMINION MOTORS MARKETING PROGRAM DESIGN Under the Guidance of Dr. Waheed Presented by: RohithDesikan(95) SiddhantKejriwal(109) SalilSrivastava(99) Swati Hasija(116) NikunjShah(105) Vishal Godara(127) Case Introduction The case‚ presented by Professor E. Raymond Corey‚ presents to the potential threat to a company‚ Dominion Motors‚ by a report brought up by John Bridges‚ a big name in the whole Oil Production domain. DMC was a
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different ways to fit into the world and learns that the rules of behavior differ in different situations‚ he may test the limits and react negatively at times. II. PURPOSE OF THE EXAMINATION The Test of Gross and Fine Motor Skills is a standardized test that measures the motor abilities a certain child develops early in life. The test is used to: * identify children who are significantly behind their
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