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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Grand Strategy Matrix: Grand Strategy Matrix has become a popular tool for formatting alternative strategies besides SWOT Matrix‚ SPACE Matrix‚ BCG Matrix and IE Matrix. Grand Strategy Matrix has four quadrants. All the organization can be positioned in one of the quadrant in Grand Strategy Matrix. Evaluative dimensions: 1. Competitive position and 2. Market growth. DPS has been positioned in the quadrant 1. A firm in quadrant 1 of Grand Strategy Matrix has strategies which put the
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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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GenRays Matrix Template Project Management Knowledge Areas|Recommended Tool(s)|Justification for Tool| Project Integration Management | Expert Judgment|-PM Plan is Formal‚ single document‚ approved (becomes officially the project plan. It defines how project is executed and controlled. Scope‚ schedule‚ and Cost‚ Change‚ and Configuration Management plans are created in this process and are part of the PM plan- Scope Management plan is developed here as well.| Project Scope Management | -Interviews
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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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1) How does the andon procedure work and what are its fundamental aspects? How much does it cost to stop the line? What are the benefits of stopping the line? The andon procedure is adopted by Toyota Motor Manufacturing to ensure quality of their products. It involves the pulling of the andon cord whenever production at a work station is unable to be completed within the cycle time‚ or whenever any problem is faced. Pulling the andon cord will alert the team leader to the station. If the problem
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University of Phoenix Material Psychotherapy Matrix Select three psychotherapy approaches to summarize. Include examples of the types of psychological disorders appropriate for each therapy. |Psychoanalysis |Behavior Therapy |Cognitive Therapies | |Summary of |Developed by Sigmund Freud‚ psychoanalysis is a method of |Behavior therapy is based off the philosophical
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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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