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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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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Dao Tran MGMT405 12:30-1:45 Dr Yan Case #3 Tata Motors 1. What inspired Tata Motors to build the Nano? Why was there a need for an inexpensive car in India? The idea of Nano–The People’s Car was inspired by the middle class Indians who bought and transported their entire families on scooters. To most middle class families in India owing a car is a far cry. Rattan Tata‚ Tata Motor’s Chairman said that the tiny car is aimed at keeping the families of India’s growing middle class from having to travel
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another country it does business in. 2. Governance and compliance would affect Tata Motors by enacting the company to manage its financial and technological information set to a certain standard. The organization is subject to many regulations governing data retention‚ confidential information‚ financial accountability‚ and recovery from disasters. 3. The different global system development issues Tata Motors may encounter as it deploys its Nano are difficulties when first setting up the global
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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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A SEMINAR REPORT ON TESTING OF BRAZING JOINT OF FIELD COILS CIRCUIT OF TRACTION MOTOR TYPE TAO-659 AND HS-15250A Submitted by: VARUN BALI Roll No. 09EI59(EE) B.Tech. 4th Year (Electrical Engineering) DEPARTMENT OF ELECTRICAL ENGINEERING INSTITUTE OF ENGINEERING & TECHNOLOGY MAHATMA JYOTIBA PHULE ROHILKHAND UNIVERSITY‚ BAREILLY (2012-2013) ACKNOLEDGEMENT I am extremely grateful to Mr. M. A. Ansari (Senior Lecturer)‚ Mr. Sanjay
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the workplace. Though often thought of as negative‚ conflict is a necessary part of life and doesn’t always have to be viewed as with negative undertones. There are two types of conflict‚ functional and dysfunctional. Though the negative perception conflict carries with it‚ in regards to in the workplace‚ functional conflict can be a tool used to promote productivity and challenge staff to resolve issues that may arise internally and focus on problem solving techniques that may be used to strengthen
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Waltham Motors Division Q1. Using budget data‚ how many motors would have to be sold for Waltham Motors Division to break even? Answer Q1: Breakeven Fixed costs $260‚000.00 = ---------------------------------- = ---------------------- = 13‚326 units number of units Unit contribution margin $19.51 UCM (Unit Contribution margin) = USP (Unit Selling Price) † UVC (Unit Variable Costs) = = $48.00 - $28.49 = $19.51 USP = Sales / Units sold = $864‚000.00/18‚000 =
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