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 de Armatur Begriffskl rung fr Armature it Armatura disambigua sk Armat ra ... 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 de Armatur Kunst io Armaturo it Armatura scultura ... 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. Armature reaction in a DC machine In a DC machine, the main field is produced by field coils. In both the generating and motoring 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 reaction demagnetizes ... common poles. Armature reaction is essential in Amplidyne rotating amplifiers. Armature reaction ...&ots BpGdNz1lT0&dq Armature Reaction Drop&ie ISO 8859 1&output html&sig UPP07UxX3VLD3nmIZxUexDnnZ9A isbn 0790610418 ref Since an armature is wound with coils of wire, a magnetic field is set up in the armature ..., and is called cross magnetization of the armature. The effect of the armature field is to distort ... 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
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
of heavy armature. Due to decrease of EMF armature current I is increased because of I ... constant R resistance of armature ohm s V electromotive force volt s I current ampere s flux ... EMF I sub a sub armature current R total resistance The total resistance R is equal to armature resistance ... 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
unreferenced date January 2011 mergeto Excitation magnetic date September 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 DC generator, not using a permanent magnet, requires a DC field current. The field may be separately excited by a source of DC, or may be connected to the armature of the generator so that the generator also provides the energy required for the field current. A shunt field and any series resistor used for adjustment may be directly connected across the armature terminals in parallel with the load. Where the machine has a series compounding winding, the field may be connected at the armature side short shunt or load side long shunt . The different connections give different voltage regulation characteristics on load. Current in the field windings of a shunt wound generator is approximately independent of the load current, because 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. There will be armature voltage drop on load, which will be reflected in the voltage applied to the shunt field. The output voltage in a dc shunt wound generator drops as load current increases because of 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. See also Dynamo DC motor Excitation magnetic Category Electrical generators engineering stub ... 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
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
Unreferenced date March 2007 Image Stator and rotor by Zureks.JPG thumb right Rotor lower left and stator upper right of an electric motor Image Hoover dam rotor.jpg thumb Rotor from Hoover Dam generator The rotor is the non stationary part of a rotary electric motor , electric generator or alternator , which rotates because the wires and magnetic field of the motor are arranged so that a torque is developed about the rotor s axis. In some designs, the rotor can act to serve as the motor s Armature electrical engineering armature , across which the input voltage is supplied. The stationary part of an electric motor is the stator . A common problem is called cogging torque . See also Armature electrical engineering Balancing machine Commutator electric Electric motor Field coil Rotordynamics Stator DEFAULTSORT Rotor Electric Category Electric motors electric power stub ar az Rotor be be x old bs Rotor elektrotehnika bg ca Rotor da Rotor de Rotor et Rootor elektrotehnika es Rotor m quina el ctrica eo Rotoro fa fr Rotor gl Rotor el ctrico hr Rotor elektrotehnika io Rotoro elektro it Rotore elettrotecnica kk nl Rotor elektromotor ja no Rotor maskindel pl Wirnik pt Rotor ru sr sv Rotor tr Rotor vi Rotor zh ... more details
gap between the clutch rotor A2 yellow and the armature A2 red . This magnetic attraction, pulls the armature in contact with the rotor face. The frictional contact, which is being controlled by the strength ... brake, the north and south pole is created by a coil shell and a wound coil. In a brake, the armature ... from the magnetic attraction, of the coil and the friction between the steel of the armature and the steel ... PDF journal Machine Design ref The electromagnetic lines of flux have to attract and pull the armature ... paths A 6 , in the rotor and armature. These slots banana slots A 7 create an air gap which causes the flux path to take the path of least resistance when the faces are engaged. This means that, if the armature ... news last1 Auguston first1 Karen last2 Flemming first2 Frank date September 1999 title Floating Armature ... The clutch has four main parts Electric field field , Rotor electric rotor , armature electrical engineering armature , and hub gear hub output B1 . When voltage is applied the stationary magnetic field ... that is always moving in the machine. The flux magnetic attraction pulls the armature in contact with the rotor the armature is connected to the component that requires the acceleration , as the armature and the output start to accelerate. Slipping between the rotor face and the armature face continues ... magnetic field field , armature , and hub which is the input on a brake B 2 . Usually the magnetic field ... when the armature is attracted to the field the stopping torque is transferred into the field housing ... Disengagement is very simple. Once the field starts to degrade, flux falls rapidly and the armature separates. One or more springs hold the armature away from its corresponding contact surface at a predetermined ... for a coil to develop a magnetic field, strong enough to pull in an armature. Within this, there are two ... the strength of a magnetic field. The second one is air gap, which is the space between the armature ... gap to overcome. Air gap is an important consideration especially with a fixed armature design ... 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 Current electricity current flows through an electromagnet , the resulting magnetic field attracts an armature that is held up by a weight. When the current is switched on, the arm is pulled down to the electromagnet, resulting in a click When the current ends, the weight pulls the armature back to its resting position, resulting in a clack. Thus, as the Telegraph Telegraph key makes and breaks a contact, the sounder echoes 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 . It is important that one does not confuse this with Continuous Wave CW 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
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 http www.eme.ee.kth.se emetor emetor.php 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
The Neale electric car was made in Edinburgh , Scotland in 1897 by Douglas Neale. The car was described as electrically driven, with a range of speed from 3 to 12 miles per hour. Only a limited number, possibly four, of these vehicles were made and none survive. Specification Battery and motor Its Lead acid battery battery was a Gaston Plant Plant or pure lead 15 cell. Each cell had a 115 amp hour capacity. The traction system was covered by seven patent s. It was direct drive from the Armature electrical engineering armature shaft on to the wheel of the vehicle. Weights The battery weighed 405 lbs. The car s motor was 1 bhp and weighed 100 lbs. The car itself excluding the battery, motor, and any load weighed 448 lbs. Its range was 35 miles at a total weight of 9 cwt. ref The Automotor Journal of 17 March 1897 ref Controls The vehicle s steering was direct to the axle, meaning the axle moved at the same rate as the steering handle. The other driver control was a switch that enabled the driver to move either forward or back at any speed, brake, ring the electric gong, and stop. There was also a foot brake to comply with the Board of Trade regulations. See also Robert Davidson inventor Scottish creator of the first battery powered locomotive in 1842. References Reflist Category Defunct motor vehicle manufacturers of the United Kingdom Category 1897 in Scotland Category Electric cars Category Vintage vehicles ... more details
color black Universal Earphones bgcolor gray font color black Driver Westone 1 Balanced armature, full ... balanced armature drivers with a passive three way crossover Westone 4 Four balanced armature drivers ... black Universal In Ear Musicians Monitors bgcolor gray font color black Driver UM1 Balanced armature ... has a removable cable UM3X UM3X RC Three balanced armature drivers with a passive three way crossover ... Custom Monitors Earphones bgcolor gray font color black Driver CR1 Balanced armature, full range, single driver AC1 Balanced armature, full range, single driver AC2 Dual balanced armatures with a passive crossover ES1 Balanced armature, full range, single driver ES2 Dual balanced armatures with a passive crossover ES3 Three balanced armature drivers with a passive three way crossover ES3X Three balanced armature drivers with a passive three way crossover ES5 Five balanced armature drivers with a passive ... 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 the effect of 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 To experi ... more details
, a balanced armature transducer intended to warn the pacemaker wearer of internal problems. ref name ... volume of sales. By April 2005, the resulting Super.fi 5 Pro, a double armature product, was offered ... UE 700 Ultimate Ears 600 single balanced armature Ultimate Ears 600vi, identical to 600, but adds built ... balanced 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 an inline crossover. The Loud ... Armature Driver Technology, with Four way Integrated Passive Crossover File UE18 pro.png thumb UE 18 Pro The UE11 Pro with Quadruple Balanced Armature Driver Technology, Single High end Frequencies ... Crossover The UE7 Pro with Triple Balanced Armature Driver Technology, Single High End Frequencies ... Balanced Armature Drivers, Single High End Frequencies Driver, Single Mid Low Frequencies Driver with integrated Passive Crossover The UE4 Pro with Dual balanced armature drivers, single high end frequencies ... UE4 pro.png thumb UE 4 Pro The UE1 Pro with single ear design, Quadruple balanced armature drivers ... Pro with Triple Balanced Armature Driver Technology, Single High End Frequencies Driver, Dual ... more details
Multiple issues unreferenced September 2010 orphan February 2009 context October 2009 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
, flat motor armature, was strikingly different from the conventional inline slot car inline motors ..., USA. ref It was nicknamed the pancake motor because of the armature s shape. The Thunderjet could ... magnets to be mounted to the front and rear, which left the full width of the chassis for the armature and windings. Inline motors require side mounted magnets, limiting the size of both armature and magnets. The extra torque of the pancake motor s oversized armature ref name globaldesign cite ... also, ending the pancake motor era. Perhaps because armature space was never at a premium in the larger ... more details
B frac mu 0 mu rIN l math The force math F math between the electromagnet and the armature plate with surface ... the armature plate and the electromagnet align as closely as possible to ensure efficient operation ... force should be a collinear load and the lock and armature plate should be face to face in the correct ... more details
rotates around through the coils in order as the armature turns. This induces a voltage in two of the coils on opposite sides of the armature, which is picked off by the brushes. Earlier Electromagnetism ... overlapped coils, and his innovation of using a ring armature, was an improvement on earlier Electrical ... Armature Minimal Core Penetration.jpg thumb Diagram of magnetic lines through a Gramme ring, showing ... design inefficiency due to how magnetic lines of force pass through a ring armature. The field ... few lines of force penetrating into the interior of the ring. Image Gramme Ring Armature Early Form.jpg thumb left Early form of the Gramme ring armature with coils penetrating the interior ... too complex to engineer. Image Drum Wound Armature Single Coil Example.jpg thumb Example of a single ... in a thin surface region and minimally penetrate the center. For very a large power generation armature several feet in diameter, using a hollow ring armature requires far less metal and is lighter than a solid core drum armature. The hollow center of the ring also provides a path for ventilation ... more details
and sets up a magnetic loop that attracts the armature. The armature is pulled against the rotor ... to match the speed of the rotor, thereby engaging the armature and the output hub of the clutch ... When current is removed from the clutch, the armature is free to turn with the shaft. In most designs, springs hold the armature away from the rotor surface when power is released, creating a small ... both the armature and friction disks. The attraction of the armature compresses squeezes the friction ... the clutch, the armature is free to turn with the shaft. Springs hold the friction disks away from ... portion of the clutch becomes magnetized and sets up a magnetic loop, which attracts the armature ... driver . As soon as the clutch armature and rotor are engaged, lock up is 100 . When current is removed from the clutch field, the armature is free to turn with the shaft. Springs hold the armature away ... current is removed from the clutch, the armature is free to turn and no relative force is transmitted ... more details
Image Progress of the State.jpg thumb right 300px The Progress of the State quadriga at the base of the Minnesota State Capitol dome. Progress of the State is the title of a group of statue sculptural figures that sits above the south portico , at the main entrance to the Minnesota State Capitol state capitol at Saint Paul, Minnesota Saint Paul , in the U.S. state of Minnesota . The statuary group is in an arrangement known as a quadriga , consisting of a chariot pulled by four horses. Three human figures two women and a man are included. The sculpture, made by Daniel Chester French and Edward Clark Potter , was completed and raised to the roof of the capitol in 1906. The underlying armature sculpture armature is steel covered in copper . The exterior copper surface is gilded in gold leaf . This quadriga is unique in that it sits atop a building s portico, rather than upon a triumphal arch like most others. The quadriga arrangement is an ancient style of statue originating more than 2000 years ago in the Roman Republic Roman republic . The four horses represent the classical element s of earth classical element earth , air classical element air , fire classical element fire , and water classical element water . Independently, the women represent industry and agriculture . Collectively, they represent civilization . The male charioteer represents prosperity. He holds aloft a variation of a Roman Legion standard inscribed with the state name small MINNESOTA small . In 1994 the group was taken down from the capitol roof for a year long restoration procedure. The quadriga was reinstalled in 1995 and the figures have had several minor in situ reapplications of gold leaf since. Image Closeuphorses.jpg thumb left A closeup of the horses br clear both External links http www.mnhs.org places sites msc quadrelatedlinks.html Minnesota State Capitol Quadriga. Minnesota Historical Society . http jensenconservation.com port current projects quadriga.html Quadriga restoration proj ... more details
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