wiktionary armatureArmature may refer to Armature computer animation , the kinematic chains used in computer animation to simulate the motions of virtual characters Armature electrical engineering , one of the two principal electrical components of an electromechanical machine Armature sculpture , a framework around which a sculpture is built disambig cs Armatura fr Armature it Armatura disambigua ... more details
Image armature sculpture.png thumb 150px right Armature for a classical pose of a figure holding a lyre. In sculpture , an armature is a framework around which the sculpture is built. This framework provides structure and stability, especially when a plastic material such as wax or clay is being used as the medium. When sculpting the human figure, the armature is analogous to the major skeleton and has essentially the same purpose to hold the body erect. An armature is often made of heavy, dark aluminium wire which is stiff, but can be bent and twisted into shape without much difficulty. The wire is affixed to a base which is usually made of wood. The artist then begins fleshing out the sculpture by adding wax or clay over the wire. Depending on the material and technique, the armature may be left buried within the sculpture but, if the sculpture is to be hollowed out for Kiln firing , it must ref 1 1 be removed. Large representational sculptures meant for outdoor display are typically fashioned of bronze or other types of sheet metal, and they require armatures for internal support and stability. For example, a large armature designed by Gustave Eiffel holds up the Statue of Liberty . The armature can be seen from below by visitors to the base of the sculpture s interior. An armature used in stop motion animation is an Joint articulated metal, wire or even wooden figure covered with material to build the character, but can be made to hold poses for extended periods of time. See also Lost wax Notes note 1 1 For this reason, much clay work for firing begins with a simple paper and or wood armature. These materials can be removed relatively easily from finished piece while it is still fairly Wiktionary plastic Adjective plastic , without damaging it. Any paper left behind will burn out in the kiln . A metal armature would expand in the heat and burst the piece. Category Sculpture terms sculpture stub io Armaturo ... more details
Armature reaction drop is the effect of a magnetic field on the distribution of the flux under main poles of a generator. ref cite book title Basic Electricity author A.Van Valkenburgh year 1993 publisher Thomson Delmar Learning url http books.google.com books?vid ISBN0790610418&id vmg1UKsTntAC&pg PT666&lpg PT666&ots BpGdNz1lT0&dq Armature Reaction Drop&ie ISO 8859 1&output html&sig UPP07UxX3VLD3nmIZxUexDnnZ9A isbn 0790610418 ref See also Armature electrical engineering Since an armature is wound with coils of wire, a magnetic field is set up in the armature whenever a current flows in the coils. This field is at right angles to the generator field, and is called cross magnetization of the armature. The effect of the armature field is to distort the generator field and shift the neutral plane. The neutral plane is the position where the armature windings are moving parallel to the magnetic flux lines. This effect is known as armature reaction and is proportional to the current flowing in the armature coils. The brushes of a generator must be set in the neutral plane that is, they must contact segments of the commutator that are connected to armature coils having no induced emf. If the brushes were contacting commutator segments outside the neutral plane, they would short circuit live coils and cause arcing and loss of power. Armature reaction causes the neutral plane to shift in the direction of rotation, and if the brushes are in the neutral plane at no load, that is, when no armature current is flowing, they will not be in the neutral plane when armature current is flowing. For this reason it is desirable to incorporate a corrective system into the generator design. These are two principal methods by which the effect of armature reaction is overcome. The first method is to shift ... in the generator to counteract the effect of armature reaction. The brush setting method is satisfactory ... for armature reaction in small generators those producing approximately 1000 W or less . Larger ... more details
Image dc armature.jpg thumb right A DC armature. In electrical engineering , an armature generally refers ... field magnetic flux for the armature to interact with, so this component can comprise either permanent magnets, or electromagnets formed by a conducting coil. The armature, in contrast, must carry ... linear machine . The armature s role is twofold. The first is to carry current crossing the field, thus ... role is to generate an electromotive force EMF . In the armature, an electromotive force is created by the relative motion of the armature and the field. When the machine is acting as a motor, this EMF opposes the armature current, and the armature converts electrical power to mechanical torque , and power ... is acting as a generator, the armature EMF drives the armature current, and shaft mechanical power ... the field. A growler electrical device growler is used to check the armature for shorts .... In alternating current machines, the armature is usually stationary, and is known as the stator ... or motor Electrical br Armature The power producing component of an alternator, generator, dynamo or motor. The armature can be on either the rotor or the stator. br Field The magnetic field component ... and can be either an electromagnet or a permanent magnet. Relation of armature to usage in sculpture ... by armature s , which are rigid frameworks. Armatures in electrical machines support windings of insulated wire. Considering that in wound rotor machines the armature moves, by extension, moving parts attracted by stationary electromagnets are sometimes called armatures. Armature reaction in a DC machine ... modes, the armature carries current and a magnetic field is established, which is called the armature flux. The effect of armature flux on the main field is called the armature reaction. The armature ... be reduced by having common poles. Armature reaction is essential in Amplidyne rotating amplifiers. See also Armature reaction drop Balancing machine Commutator electric Commutator Electric generator ... more details
Unreferenced date April 2007 An armature is the name of the kinematic chain s used in computer animation to simulate the motions of virtual human or animal characters. In the context of animation, the inverse kinematics of the armature is the most relevant computational algorithm. See also Links mechanical Linkages Category 3D graphics software Category Computational physics compu graphics stub cs Armatura po ta ov grafika ... more details
Summary Text from original page Figure 248 Early form of Gramme ring armature, the core being shown cut through, and some of the coils displaced to make it clearer. The core, F, consists of a quantity of iron wire wound continuously to form a ring of the shape shown by the section. Over this is wound about thirty coils of insulated copper wire, B C D, etc, the direction of the winding of each being the same, and their adjacent end connected together. The commutator segments consist of a corresponding number of brass angle pieces, m n, which are fixed against the wooden boss, o, carried on the driving shaft. The junction of every two adjacent cells is connected to one of the commutator segments, as shown at n . Public Domain source Hawkins Electrical Guide, Volume 1 Chapter 17 The Armature, Page 223. Copyright 1917 by Theo. Audel & Co. Printed in the United States Scanned by Dale Mahalko, Gilman, WI, USA User DMahalko DMahalko User talk DMahalko talk 08 44, 13 January 2008 UTC Licensing PD US ... more details
Summary Original text from illustration Figure 250 Distribution of magnetic lines of force through a Gramme ring. Since the metal of the ring furnishes a path of least reluctance, most of the magnetic lines will follow the metal of the ring and very few will penetrate into the aperture of the interior. This condition causes a serious defect in the action of ring armature armatures rendering the winding around the interior useless for the production of electromotive force. Hence, in ring armatures only about half of the winding is effective, the rest being dead wire , adding its resistance to the circuit, thus decreasing the efficiency of the machine. Public Domain source Hawkins Electrical Guide, Volume 1 Chapter 17 The Armature, Page 225. Copyright 1917 by Theo. Audel & Co. Printed in the United States Scanned by Dale Mahalko, Gilman, WI, USA User DMahalko DMahalko User talk DMahalko talk 09 18, 13 January 2008 UTC Licensing PD US ... more details
Summary Text from original illustration Figure 251 Illustrating the principle of an early Siemens drum winding. In order to make the winding and connections clear, one coil and the commutator is shown assembled, although the latter is not put in place until after all the coil sections have been wound, with the ends of the wires being temporarily twisted together until all can be soldered to the commutator risers. The cores of these early machines were made of wood, overspun circumferentially with iron wire before receiving the logitudinal copper windings. Public Domain source Hawkins Electrical Guide, Volume 1 Chapter 17 The Armature, Page 226. Copyright 1917 by Theo. Audel & Co. Printed in the United States Scanned by Dale Mahalko, Gilman, WI, USA User DMahalko DMahalko User talk DMahalko talk 09 54, 13 January 2008 UTC Licensing PD US ... more details
In power engineering , V curve is the graph showing the relation of Armature electrical engineering armature current as a function of Stator field current in synchronous machine s. The purpose of the curve is to show the variation in the magnitude of the Armature electrical engineering armature current as the Excitation magnetic excitation voltage of the Electrical machine machine is varied. This curve is one of the most important characteristics for electrical generator . References Saadat, Hadi. 2004. Power Systems Analysis . 2nd Ed. McGraw Hill. International Edition. Category Electrical generators ... more details
Summary A typical variable force solenoid magnetic design, with a conical working air gap armature, coil, and housing. Licensing GFDL self migration relicense ... more details
per minute RPM ,i.e. motor speed K proportional constant R resistance of armature ohm s V ... resistance field winding connected in parallel with the armature. It responds to increased load by trying to maintain its speed and this leads to an increase in armature current. This makes it unsuitable ... motor has a low resistance field winding connected in series with the armature. It responds to increased load by slowing down and this reduces the armature current and minimises the risk of overheating ... Inverter electrical inverter s. The counter EMF aids the armature resistance to limit the current through the armature. When power is first applied to a motor, the armature does not rotate. At that instant, the counter EMF is zero and the only factor limiting the armature current is the armature resistance. Usually the armature resistance of a motor is less than 1 therefore the current through the armature would be very large when the power is applied. Therefore the need arises for an additional resistance in series with the armature to limit the current until the motor rotation can build ... more details
Summary A copper and brass on steel armature sculpture by Hobart Ray Brown. Personal collection Ellin Beltz. Photo by Ellin Beltz. Licensing GFDL self no disclaimers migration relicense ... more details
Summary Text from original diagram Figure 299 Distribution of magnetic lines through solid drum armature of a four pole machine. Public Domain source Hawkins Electrical Guide, Volume 1 Chapter 19 Theory of the Armature, Page 281 Copyright 1917 by Theo. Audel & Co. Printed in the United States Scanned by Dale Mahalko, Gilman, WI, USA User DMahalko DMahalko User talk DMahalko talk 10 41, 13 January 2008 UTC Licensing PD US ... more details
polarity polarity in multiwinding Armature electrical engineering armature s to test Rotor electric ... coil s before installation into an armature or a stator as a low voltage isolation transformer ... more details
unreferenced date January 2011 A shunt generator is a method of generating electricity in which field winding and Armature electrical engineering armature winding are connected in parallel, and in which the armature supplies both the load current and the field current. A Direct current or DC shunt generator is a type of shunt generator that requires a DC field current. A shunt generator can be parallel or in series to the armature. There are four types of shunt generators short shunt, long shunt, series, or parallel. Shunt wound In this field winding is connected in parallel with the armature conductors and have the full voltage of the generator applied across them.The field coils consist of many turns of small wire. They are connected in parallel with the load. In other words, they are connected across the output voltage of the armature. Current in the field windings of a shunt wound generator is independent of the load current currents in parallel branches are independent of each other . Since field current, and therefore field strength, is not affected by load current, the output voltage remains more nearly constant than does the output voltage of the series wound generator. In actual use, the output voltage in a dc shunt wound generator varies inversely as load current varies. The output voltage decreases as load current increases because the voltage drop across the armature resistance increases E IR . In a series wound generator, output voltage varies directly with load current. In the shunt wound generator, output voltage varies inversely with load current. A combination of the two types can overcome the disadvantages of both. This combination of windings is called the compound wound dc generator. Category Electric motors engineering stub ... more details
Summary This is an armature photo of one of the Shamu 737s, taken during the refueling process at an airport in Salt Lake city, Utah. This photo was also taken on board another 737,a blue and red style that had taken off from Boise, Idaho air terminal in 2005. Licensing GFDL self with disclaimers migration relicense ... more details
market. They came out with universal fit, high end earphones using similar dual armature technology ... armature product called the TripleFi as well as earphones with diaphragm speakers which allowed them ... armature driver. The SuperFi 4 with a proprietary balanced armature speaker. The SuperFi 5 with one Proprietary balanced armature driver. The SuperFi 5vi designed for iPhone, with one Proprietary balanced armature driver. The SuperFi 5 EB with one balanced armature and one 13.5mm diaphragm driver. The SuperFi 5 Pro with Dual balanced armature drivers with pre emptive inline crossover. The Ultimate Ears 600 with Single top fire balanced armature speaker. The Ultimate Ears 700 with Dual Micro balanced armature in ear monitor with pre emptive inline crossover. The TripleFi 10 Pro with three balanced armature in ear monitor with pre emptive inline crossover. The TripleFi 10vi Pro, designed for the iPhone, with three balanced armature in ear monitor with pre emptive inline crossover and inline ... Balanced Armature Driver Technology, with Four way Integrated Passive Crossover The UE11 Pro with Quadruple Balanced Armature Driver Technology, Single High end Frequencies Driver, Single Mid Frequencies ... Pro with Triple Balanced Armature Driver Technology, Single High End Frequencies Driver, Dual Mid Low ... Armature Driver Technology, Single High End Frequencies Driver, Dual Mid Low Frequencies Drivers with Integrated Passive Crossover. The UE5 Pro With Dual Balanced Armature Drivers, Single High End ... with Dual balanced armature drivers, single high end frequencies driver, single mid low frequencies ... balanced armature drivers, with Four way integrated Passive Crossover. All current Ultimate Ears Customs ... more details
File Telegraph Sounder.JPG thumb Telegraph Sounder A telegraph sounder is a device which produces an audible sound when connected to an operating electrical telegraph . It is similar in form to a relay . When a Current electricity current flows through the induction coil , the resulting magnetic field attracts an armature that is held up against a metal arm. When the current is switched off, the armature drops to its resting position, resulting in a click . When the current returns, the armature is raised back to the upper arm resulting in a clack. Thus, as the remote telegraph key makes and breaks a contact, the sounder echos the up and down state of the key. It is important that a sounder makes a sound both when the circuit is broken and when it is restored. This eases the process of identifying long and short presses of the key to send characters in morse code . The default condition of the telegraph circuit is with electricity flowing. This enables the operator to easily detect a fault in the wire. External links http www.morsetelegraphclub.org Morse Telegraph Club, Inc. The Morse Telegraph Club is an international non profit organization dedicated to the perpetuation of the knowledge and traditions of telegraphy. DEFAULTSORT Telegraph Sounder Category Telegraphy ... more details
A Cascade Converter is a type of motor generator which was patented in 1902 by J. L. la Cour and O. S. Bragstad . It consists of an induction motor driving a dynamo through a shaft. In addition, the Rotor electric rotor of the induction motor is electrically connected to the armature electrical engineering armature of the dynamo. When the machine is running, half the power is transmitted mechanically through the shaft while the other half is transmitted electrically. The advantage of this arrangement is that the machine can be smaller than a conventional motor generator of the same power. The United Kingdom British manufacturing rights for the Cascade Converter were held by Bruce Peebles & Co. Ltd. of Edinburgh . Sources The Electrical Year Book 1937, published by Emmott and Company Limited, Manchester, England, pp 105 106 See also Rotary converter Rotary phase converter Category Electric power systems components ... more details
Summary Originally uploaded at http peswiki.com index.php Image Pat567818.png Description U.S. Patent 0,567,818 Electrical Condenser 1896 September 15 Condenser constructed or provided with means for exclusion of air or gas Armature composed of a conducting liquid Armatures in two separate bodies of conducting liquid insulated electrically and contained in a receptacle Insulating liquid seal on the surface of the conductive liquids. Licensing PD US patent ... more details
Orphan date March 2011 In power engineering , winding factor is what makes the rms generated voltage in a three phase AC electrical generator become lesser. This is because the Armature electrical engineering armature winding of each phase is distributed in a number of slots. Since the Electromagnetic field emf induced in different slots are not in phase, their phasor sum is less than their numerical sum. This reduction factor is called distribution factor K sub d sub . Another factor that can reduce the winding factor is when the slot pitch is smaller than the pole pitch, called pitch factor K sub p sub . The winding factor can be calculated as K sub w sub K sub d sub K sub p sub . Most of the three phase machines have winding factor values between 0.85 and 0.95. With the free online winding editor from Emetor, it is possible to determine the fundamental winding factor as well as the winding factor space harmonics for different winding arrangements as a function of the number of slots and number of poles of the winding. References Saadat, Hadi. 2004. Power Systems Analysis . 2nd Ed. McGraw Hill. International Edition. http www.emetor.com edit windings Emetor winding editor , December 18, 2010, Emetor AB Category Electrical generators ... more details
Unreferenced date December 2009 About a component of electromotive devices the component of a compressor Axial compressor Description Axial compressor File Stator and rotor by Zureks.JPG thumb right Rotor and stator of electric motor File Stator machine triphas e.jpg thumb Stator of a 3 phase AC motor The stator is the stationary part of a rotordynamics rotor system, found in an electric generator , electric motor and Flagellum biological rotors . Depending on the configuration of a spinning electromotive device the stator may act as the field magnet , interacting with the armature electrical engineering armature to create motion, or it may act as the armature , receiving its influence from moving field coils on the rotor. The first DC generators known as dynamo s and Electric motor Wound field DC motor DC motors put the field coils on the stator, and the power generation or motive reaction coils on the rotor. This was necessary because a continuously moving power switch known as the Commutator electric commutator is needed to keep the field correctly aligned across the spinning rotor. The commutator must become larger and more robust as the current increases. The stator of these devices may be either a permanent magnet or an electromagnet . Where the stator is an electromagnet, the coil which energizes it is known as the field coil or field winding . An AC alternator is able to produce power across multiple high current power generation coils connected in parallel, eliminating the need for the commutator. Placing the field coils on the rotor allows for an inexpensive slip ring mechanism to transfer high voltage, low current power to the rotating field coil. It consists of a steel frame enclosing a hollow cylindrical core made up of laminations of silicon steel . The laminations are to reduce hysteresis and eddy current losses. See also Rotor electric Rotor Commutator electric Armature electrical engineering Electric motor Eddy current Category Electric motors ar ... more details
Orphan date February 2009 A jim crow is a tool for bending Rail tracks rail s, consisting of a U shaped or V shaped armature with a hefty screw rod in its axis. Deluxe models are outfitted with rollers for continuous bending. http members.trainorders.com howard 20maculsay trains2see railfangloss.html External links http www.catskillarchive.com rrextra tkwk03.Html with http www.catskillarchive.com rrextra tkwk495.Html illustration http www.narrow gauge.co.uk gallery show.php?image id 405&cat id 79 Photograph http www.mda.org.uk railway railobjj.htm Railway Object Name Thesaurus Category Tools Category Rail technologies tech stub ... more details
The counter electromotive force also known as back electromotive force abbreviated counter EMF , or CEMF ref name Graf Graf, counterelectromotive force , Dictionary of Electronics ref is the voltage , or electromotive force , that pushes against the current which induces it. CEMF is caused by a changing electromagnetic field. It is represented by Lenz s Law of electromagnetism . Back electromotive force is a voltage that occurs in electric motor s where there is relative motion between the armature electrical engineering armature of the motor and the external magnetic field . One practical application is to use this phenomenon to indirectly measure motor speed and position. ref cite web url http www.acroname.com robotics info articles back emf back emf.html title Back EMF publisher Acroname.com date 2006 08 07 accessdate 2010 02 07 ref Counter EMF is a voltage developed in an inductor network by a pulsating direct current pulsating current or an alternating current ref name Graf . The voltage s Polarity physics polarity is at every moment the reverse of the input voltage. ref name Graf ref Naval Electrical Engineering Training Series , Module 02 Introduction to Alternating Current and transformers , Inductance, http www.tpub.com neets book2 2a.htm self inductance ref In a motor using a rotating armature and, in the presence of a magnetic flux , the conductors cut the magnetic field lines as they rotate. The changing field strength produces a voltage in the coil the motor is acting like a generator.. Faraday s law of induction . This voltage opposes the original applied voltage therefore, it is called counter electromotive force . by Lenz s law . With a lower overall voltage across the armature, the current flowing into the motor coils is reduced. ref Nuclear Power Fundamentals Training Manuals . DC Generators, http www.tpub.com content doe h1011v2 css h1011v2 79.htm Counter Electromotive Force CEMF , DC Equipment Terminology, Electrical Science Volume 2. ref Efficie ... more details
Orphan date February 2009 Context date October 2009 unreferenced date September 2010 Mush winding is a type of AC armature winding. In mush winding the coil span should be odd. It essentially consists of number of long and short Electrical conductor conductor s, the number being dependent on the number of slots per pole per phase. Connection is made between a long and short conductor only. The winding proceed till all the conductors are connected. The following diagram shows the developed winding diagram of a 4 pole 24 slots 3 phase alternator Image Mushwdg1.GIF Category Electric motors ... more details
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