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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Observation # 4: Notes: It was 10:05am on Tuesday‚ October 20th‚ 2015: The class was cleaning up after their activity with gluing popsicle sticks to the drawn out number one. Once most of the children were finished with their project‚ the teacher said cheerily‚ “Alright my friends‚ who is all done with their craft! Wow! Look at all these wonderful number ones!” One toddler yelled out‚ “I done!” Another toddler said happily‚ “Look at my picter!” A third toddler jumped up and said‚ “I sticky! Bleh…”
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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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Naturalistic Observation In order to study human development and perform naturalistic observation I went to the mall. I selected a 9-year-old white girl as the subject for my observation. I observed the subject for 30 minutes. During my observation the subject was not interrupted and was not aware of my study. The girl was spending time with her mother and brother at the mall. She was enjoying herself. She played some games with her brother. The games included jumping and running. During one of
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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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In order to start the process for my observation I had to first speak with the parents of the child Mr. and Mrs. Pretty (not their real name). I spoke with Mrs. Pretty because her husband was unavailable at the time and I know her very well. I informed her about the assignment and discussed the outline of it with her to ensure that she knew exactly what the observation entail as well as the fact that I might need additional information from her or her husband. She informed me that she would inform
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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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