If there are no energy conversions in a transformer then why it is called a machine?
99973
A transformer in the chinese language is called an 'Electrical pressure changing device'no mention is made of an energy converter in any science.\nTo talk about energy conversion, it is necessary to know what is the definition of energy.\nEnergy has never been a quantity ,but rather a space-time phenomena.\n\nThe transformer is called transformer because it transfers electrical power.It moves an electrical force from one velocity level to another.This make senses with the chinese\ndefinition of the transformer.Anything which transfers power in order to do work is called a machine.
237314
In any machine there is a way to put the energy inside and there is a way to take the energy out.The out put energy need not be the same type of  input energy.\nIn any machine as per conservation of energy the input and out put energies  must be equal.\n But what we speak of efficiency of a machine is the ratio of the useful out put energy to the input energy.\nNaturally this will be less than  the total out put energy. It follows efficiency is less than 100%.\nBut we can try our best to reduce the unused energy (not used for our purpose)to be the minimum possible.\n\nFor example in machines due to friction many energy is being lost as the parts are heated. But with out friction no parts will work. So  some minimum amount of energy has to be wasted (wasted according to us and not according to nature). \nA car rolls down the road because of friction and the same friction reduces efficiency. \nThe efficiency of an incandesant bulb is low because the useful  light energy is low compared to the input electical energy and most of the energy is wasted as heat energy.\nThe florescent bulb has high efficiecy compared to the ordinary bulb because less amount of energy is not used for our purpose.
300542
"An assembly consisting of a magnet mounted on a frame, and a wire coil (armature) that can be rotated within the magnetic field. The function of the generator is to convert mechanical energy into electrical energy."\n\nBasically in a generator you can induce current by rotating a magnet inside a wire coil.  The opposite of this is a motor in which the electricity causes mechanical movement.
482056
I am not sure I understand your question. Are you asking, what are the effects of core losses in relationship with frequency and supply voltage?\n\nThe total power loss in a transformer is a combination of three types of losses. One is due to the DC resistance in the primary and secondary windings. This is called Copper loss. The two other losses are due to Eddy Currents and Hysteresis in the core of the transformer. Copper loss, Eddy Current and Hysteresis loss result in unwanted conversion of electrical energy into heat energy.
679572
Machines use electricity to run.  So, no refrigerators, no stoves, no air-conditioners, and of course, no lights.  No television, no radio, no such things as batteries, so no Ipods.  No computers.  And cars need electricity to create the spark that burns the gasoline.  So, no cars!\n\nThe impact of no electricity would bring us back more than 100 years.  We couldn't have modern medicines because their could be no place to make them.  And no refrigeration means no more supermarkets, no more ice cream, no more cold soda.\n\nHmm, what do you now think about electricity?
1125393
hey men first know wat is a turbine.\nA turbine is a prime-mover used to provide the mechanical energy required for the generator.\nPrinciple of generators:\nwhenever a flux linking in a conductor changes there is an emf induced in the conductor.\n\nhere the flux is provided initially by a battery or some electrical source and the mechanical energy is provided by the turbine.\n\nIf u see the Mechnical energy from the turbine is converted into electrical.\nRemember energy can be converted from one form to another.This is the basic law.
64802
"any mechanical or electrical device that transmits or modifies energy to perform or as sist in the performance of human tasks" \n\nthe fact that volatage is converted when passing "through" a transformer qualifies it as a machine.
1027928
Neither of the other answers makes any sense.  \n\nFirst, induction motors or anything for that matter don't "consume" reactive power.  Reactive power is traded back and forth.\n\nSecond, yes, there is an average reactive power component when induction motors run.  This has to do with the fact that induction motors are "inductive" (go figure, huh?).  To produce the needed magnetic field in their airgap and to have high efficiency they have a very large coil that except for a small series resistance is basically and inductor.\n\nInductors of course are reactive.  THe only thing that keeps the motor from being only reactive power is that the shaft output power forces some real power input.  However, some "magnetizing current" is required to run in any case, and there will always be some reactive power except perhaps in very rare circumstances.
90631
energy because power wich is in mw multipiled by time wich is actualy in seconds or hour equals energy wicj is in joules
100209
Technically a device that converts mechanical energy into electrical energy is usually called a transducer unless it is generating power at which point it is usually called a generator.\n\nSo a generator is a spinning magnet in a coil of wire. Spinning the magnet generates electricity in the coil. Examples of transducers include phonograph needles, sonar crystals, and BBQ grill lighters. These use a piezoelectric device to convert mechanical energy to electricity.
948920
All rotating electrical machines can be classed as either "motor" or "generator". The definition is based on the direction of electrical power flow. A motor requires electrical power to provide rotation (and hence useful torque); a generator is driven by an outside torque source to produce electrical power.\n\nFor a machine to work, there has to be a magnetic field created to transfer the mechanical power to/from the stationary portion to the rotating portion.\n\nFor the case of an induction generator, an outside force rotates the shaft of the electrical machine. (You can assume here that the rotor has been magnetized through the use of an external capacitance circuit to provide discrete magnetic poles.) The rotation of the magnetic field, through mechanical means, induces a current to flow in the stator winding. Since the winding is a resistive path, there will also be a potential developed.\n\nThe output (volts and amps) will both be sine waves, operating at a frequency dependent on the rotational speed of the rotor and the number of poles.
1143514
Many forms of energy exist around us. Energy cannot be created or destroyed, only changed from one form to another. If a person ever says that energy is lost, what really happens is that energy is spent or changed into different forms. It never really is lost. For example, if you use water energy to create mechanical energy, you might "lose" some energy by creating heat energy in the form of friction.
30599
The field of thermodynamics has defined that you can never get more energy out of a motor than it takes to run it.  It's called the law of the conservation of energy, and the efficiencies possible by engines have been identified by what is called the Carnot cycle.  You will always lose energy, due to the constant increase in "entropy" (a measure of useful work possible in a system) in all spontaneous processes.\n\nWhat you describe is a perpetual motion machine.  Due to the inefficiency of the motor, you will lose useable energy (ie there will be an increase in entropy) such that the motor wil slow down continually until it eventually comes to a stop.\n\nI had this same idea when I was a kid until my dad set me straight.  Then I was very sad.
394866
Transformers are a cartoon show and movie!!! they arn't real, same deal with Mechs ; ;\n\n\naww i can't answer the same thing twice... but yeah\n\na 'real transformer' tho? as opposed to those virtual/imignary ones?\n\nbut i'm goign to assume electrical transformers your talking about...\n\nfirst, resistance in the wires, converts some of the energy to heat, and the magnetic feild aroudn the wires, which is what is used to transform the voltage/amperage radiate elsewhere some in the design.\n\nTesla made some kick-ass transformers
656571
b) and c)\n\nthe transformer works in such a way that electric current flows through the secondary circuit only when the electric current in the primary circuit is changing.\n\nwhen you close the switch the electric current in the primary circuit suddenly rises from 0amp to some value\nwhich causes electric curent to flow through the secondary circuit\n\n.. b) is true\n\nwhen you open the switch the electric curent in the primary circuit changes from the maximum value to 0amps thus electric curent flows through the secondary.\n\n.. c) is true\n\nbut \n..a) is false\n\nsicne a battery is a dc source wich means that as long as the switch is closed it supplies a steady amount of electric current through the primary. thus ther will be no current through the secondary.
498628
Mostly because of, well, just the way the world works, and the laws of physics and all that. All energy is conserved and simply "transformed" into different kinds of energy. It is never created or destroyed.\n\nSpeaking of petroleum and all of that as previous posters have mentioned - this is merely the converting of different elements or matter into energy. This is not really "creating" energy, because the potential energy is always there, latent in the given element. It simply cannot be "used" yet. I hope that suffices as a layman explanation.
811233
For all steam and gas turbine... you need a circuit breaker. But it is only the matter of designing before or after the transformer and how safe you want to the system to be