Tutorial 4 – DC Machine 1. Describe operation of DC machine (motor and generator) using illustrations. Specifically explain the purpose of: a. brushes d. armature winding b. split ring commutators e. effect of back emf (in operation) c. field winding 2. Draw the different configurations of DC machines a. shunt c. separately excited b. series 3. Develop‚ using Kirchhoff’s laws‚ equation for Ea (armature voltage) in both motoring and generating mode. 4. Describe three (3) methods of speed control in DC
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Electrical Machines Electrical Machine Stationary Transformer Rotating DC AC Motor Induction Generator Motor Generator Synchronous Motor Generator Electrical Generator / Motors An electric generator converts mechanical energy into electrical energy. An electric motor converts electrical energy into mechanical energy. Mechanical Input Electrical input ELECTRICAL MACHINES Generator ELECTRICAL MACHINES Motor Electrical Output Mechanical output
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[pic] [pic] Hotoven ltd Ireland Business plan 06th of January 2013 Table of Contents Page Confidentiality Agreement ii 1) Executive Summary 1 2) Company Description 2 Company Structure 2 Products and Services 3 Competitive Advantage 4 SWOT Analysis 5 Future Products 6 3) Market Analysis 3 Target market 3 Total market valuation 3 Targeted share 3
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TOPIC: MACHINE TOOLS India stands 13th in the production and 6th in the consumption of machine tools in the world. The country is set to become a key player in the global machine tools industry with substantial increase in manufacturing of high end machine tools. The Indian machine tool industry has approximately 1000 units in production of machine tools‚ accessories/attachments‚ sub-systems and parts. Threefourth of machine tool producers in India are ISO certified. The market for machine tools
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Grinding Machines (Belt Grinding Machines) − Course: Mechanical Woodworking Techniques. Trainees’ Handbook of Lessons (10 pages) Table of Contents Working on Grinding Machines (Belt Grinding Machines) − Course: Mechanical Woodworking Techniques. Trainees’ Handbook of Lessons (10 pages) .............................................................................1 1. The Purpose of Grinding on a Belt Grinding Machine........................................................................1 2. Construction
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Simple Machines Definitions: Machine- A device that makes work easier by changing the speed ‚ direction‚ or amount of a force. Simple Machine- A device that performs work with only one movement. Simple machines include lever‚ wheel and axle‚ inclined plane‚ screw‚ and wedge. Ideal Mechanical Advantage (IMA)- A machine in which work in equals work out; such a machine would be frictionless and a 100% efficient IMA= De/Dr Actual Mechanical Advantage (AMA)- It is pretty much the opposite of
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WHAT IS VIRTUAL MACHINE ? A virtual machine (VM) is a simulation of a machine (abstract or real) that is usually different from the target machine (where it is being simulated on). Virtual machines may be based on specifications of a hypothetical computer or emulate the architecture and functioning of a real world computer. A virtual machine (VM) is a software implementation of a machine (i.e. a computer) that executes programs like a physical machine. Virtual machines are separated into two
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1. Introduction The first lathe machine that was ever developed was the two-person lathe machine which was designed by the Egyptians in about 1300 BC. Primarily‚ there are two things that are achieved in this lathe machine set-up. The first is the turning of the wood working piece manually by a rope and the second is the cutting of shapes in the wood by the use of a sharp tool. As civilizations progressed‚ there have been constant modifications and improvements over the original two-person lathe
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1. Envelope machine FCI is deciding on whether to buy a machine that makes envelopes for their cards. The cost of envelopes is one of FCI’s largest cost components. Referring to Ms. Beaumont’s estimations the project would generate $218 000 increase in profit after taxes every year during its eight year economic life. Cost of acquiring the machine is 500‚000. If we suppose that FCI is able to convince banks to loan $500‚000 to invest in the envelope machine‚ we can first use FCI’s normal interest
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Rotor machine From Wikipedia‚ the free encyclopedia (Redirected from Rotor machines) Jump to: navigation‚ search A series of three rotors from an Enigma machine‚ used by Germany during World War II In cryptography‚ a rotor machine is an electro-mechanical device used for encrypting and decrypting secret messages. Rotor machines were the cryptographic state-of-the-art for a brief but prominent period of history; they were in widespread use in the 1930s–1950s. The most famous example is
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