What is Transformers: Definition and 267 Discussions

Transformers is a media franchise produced by American toy company Hasbro and Japanese toy company Takara Tomy. It follows the battles of sentient, living autonomous robots, often the Autobots and the Decepticons, who can transform into other forms, such as vehicles and animals. The franchise encompasses toys, animation, comic books, video games and films. As of 2011, it generated more than ¥2 trillion ($25 billion) in revenue, making it one of the highest-grossing media franchises of all time.
The franchise began in 1984 with the Transformers toy line, comprising transforming mecha toys from Takara's Diaclone and Microman toylines rebranded for Western markets. The term "Generation 1" covers both the animated television series The Transformers and the comic book series of the same name, which are further divided into Japanese, British and Canadian spin-offs, respectively. Sequels followed, such as the Generation 2 comic book and Beast Wars TV series, which became its own mini-universe. Generation 1 characters underwent two reboots with Dreamwave in 2001 and IDW Publishing in 2005, with a third starting in 2019. There have been other incarnations of the story based on different toy lines during and after the 20th century. The first was the Robots in Disguise series, followed by three shows (Armada, Energon, and Cybertron) that constitute a single universe called the "Unicron Trilogy".
A live-action film series started in 2007, again distinct from previous incarnations, while the Transformers: Animated series merged concepts from the G1 continuity, the 2007 live-action film and the "Unicron Trilogy". For most of the 2010s, in an attempt to mitigate the wave of reboots, the "Aligned" continuity was established. In 2018, Transformers: Cyberverse debuted, once again, distinct from the previous incarnations.
Although initially a separate and competing franchise started in 1983, Tonka's Gobots became the intellectual property of Hasbro after their buyout of Tonka in 1991. Subsequently, the universe depicted in the animated series Challenge of the GoBots and follow-up film GoBots: Battle of the Rock Lords was retroactively established as an alternate universe within the Transformers robot superhero storyline.

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  1. C

    Temperature rise in power transformers atheistrical

    The post "Temperature rise in power transformers was locked, however there may be a simple safe answer. The post said the winding temperature was 73 deg C. 73 deg C is safe for winding temperature. If it was winding temperature RISE of 73 deg C, then there may be problems. So which was it?
  2. H

    Current Transformer Accuracy Under %5 Load Level

    Hello , I would like to ask one question. Current transformers has one of the major component in electricity but we know that per load level, VA, temperature ext accuracy of these transformers can change. CT manufacturers gives accuracy diagrams for different load levels from %5 load to full...
  3. P

    Transformers problem and output voltage

    Homework Statement Power is generated at 24 kV at a generating plant located 124 km from a town that requires 40 MW of power at 12 kV. The voltage will be stepped up from 24 kV to some voltage V by a perfect transformer, transmitted over wires, and then stepped down to 12 kV by another...
  4. J

    Why can't transformers work with direct current?

    A transformer consists of a conductor (often times can be an iron core), which is used to transfer current/voltage from one circuit (sometimes power lines) to another circuit (homes- often referred to as "stepping down"). This is done by taking a wire connected to the first circuit and wrapping...
  5. J

    Question About Current Transformers

    I am hoping to use a overload relay I have rated at a low amperage to protect a higher amperage circuit. I plan to use 100/5 current transformers and connect them to the line/load terminals of the overload relay. The trip rating will be at 4 amps through the ct circuit but will have a time...
  6. H

    Matching Input and Output Current on Transformers: A Common Question

    Okay, now this may sound ridiculously stupid, but I know next to nothing about transformers and so I have a question: Does the input current on a transformer have to match the rated output in order to get that output? (i.e. A trans rated 5 amps putting out the full rated current on only...
  7. L

    Tap Changers Transformers in parallel

    If tap changers are on auto and the harmonics are filtered out, what would happen if the tap changers are switched to manual i.e. harmonics/noise
  8. M

    Serial connection: two transformers

    Good afternoon! To build a serial connection of two transformers, four coils are used: Two of this coils have n1 turning, two of them have n2 turnings. The coils are built together in the way, you can see on this picture: http://img197.imageshack.us/img197/2698/transformer.jpg The...
  9. Y

    Why Does Transformer Coil Ratio Halve Current Despite Doubling Voltage?

    If a transformer with coil ratios 2:1 creates a voltage twice that of the primary in the secondary coil why is the current halved? I realize that this is a consequence of the conservation of energy, but there must be a physical reason behind this. What is causing the additional impedance that...
  10. A

    Flux distribution in transformers

    Dear all members , i am glad to open a new topic well , let's get into the main point quickly you know that transformers is build on the idea that energy is transferred from one winding to the other by the transferring of flux form primary winding to secondry winding well ,to make the...
  11. B

    Can Magnetic Flux Induce EMF in Transformer Without Shearing Winding Conductors?

    Hi, :smile: I would like to understand something pertaining to transformer action. How does a changing magnetic flux, assumed to be bound by an 'ideal' magnetic core (with zero leakage flux), induce an EMF in the secondary winding of a transformer...without the flux ever shearing or cutting...
  12. W

    What causes the humming sound in transformers?

    Why do transformers hum? Is it the iron core vibrating & if it is what is it that makes it vibrate? Is it the little atomic magnetics in the iron changing directions with the ac? Can anyone enlighten me?
  13. H

    EM Radiation from Power Transformers

    Hello, The city added a new electric transformation station near my house and has recently closed down a kindergarten adjacent to it due to 'radiation safety' reasons. My house is two doors down and my mother is concerned that radiation from the station might be hazardous to her health. She...
  14. K

    Transformers Coursework- Interpretation?

    did an investigation on Transformers- something I thought would be a good idea. The aim was to find out how the amount of resistance put onto the transformer affects the power loss. By having a step-up transformer 300 turns on the primary and 600 turns on the secondary, then by connecting a...
  15. R

    Can Transformers Replace Resistors in Controlling Current Flow?

    Hello, I am new here and this looks like a good place to get answers! Wondering if someone could clarify something for me. When withdrawing current from a socket to an electrical device, the current is determined by I= V/R. So the manufacturer of the device can add resistors to manipulate the...
  16. B

    Current waveforms in transformers and rectifiers

    I was wondering why the current waveform in a rectifier circuit that uses transformers, is not out of phase with the voltage waveform. Does the transformer not shift the current waveform out of phase with the voltage waveform? Thanks for any help.
  17. T

    Isolation Transformers and Electrical Safety

    Hi, An isolation transformer is used in order to "safely" separate one part of an electric circuit from the mains. (description in http://en.wikipedia.org/wiki/Isolation_transformer" ) Still I have problems grasping the important concept of such a transformer. I have spent some time...
  18. S

    Understanding Transformer Output Current: Ohm's Law vs. Transformer Losses

    so in transformer if we step up voltage,current is reduced and if we step down, current is increased based on p=vi...but based on ohm's law v=ir..so we step up,current should be increasing and and if we step down, current is decreasing right ..which formula is correct?
  19. M

    Transformers and induced current

    Hello. 3) A step up transformer increases the mains voltage of 230V to 5000V. a) calculate the ratio Number of primary turns/Number of secondary Turns I know the formula input voltage/output voltage = Primary turn/ Secondary Turns So i did 230/5000 = 0.046. This as a fraction is...
  20. H

    A question about transformers

    There are primary and secondary coils in a transformers. So, what hat are the difference between when the secondary coil is in 1)open circuit, 2)closed circuit with a load, and 3) shorted circuit? When can the ideal transformer equation be used? It seems that not only is it related to whether...
  21. D

    Asking about AC, Transformers, and Generating Electricity

    Well this is my first post on this topic so my questions might be relatively simple compared to most. First thing I would like to ask is Is it possible to connect to different AC power generators together to power one object? If I'm not using the right terminology let me know.
  22. M

    Current transformers costs

    In an industrial project, the customer decided to change first order for new power transformer. According to new order, the rating power of transformer should be half. He enquired new detail cost table and transformer manufacturer submitted it. Future power transformer user cheeked that...
  23. K

    Induced voltages and step-up transformers

    I have been trying, but I still have 3 problems I can't get. 1)A simple generator has a 600 loop square coil 18.0 cm. on a side. How fast (in rev/s.) must it turn in a 0.730 T. field to produce a 120-V. peak output? I think I need to use the equation Emax=NBAw. N=600 B=.730 A=.0324...
  24. S

    How Do You Prove Vpri in This Transformer Circuit Problem?

    Homework Statement http://img169.imageshack.us/img169/8502/73860646mw1.jpg Given R3= 10.0Ω IR1= 2.0A Prove that Vpri =30( 10R1+R1R2+10R2)/R2 Homework Equations The Attempt at a Solution Current across R2= 2xR1/R2 Current across R3= 2R1/R2 +2A Total Voltage in sec...
  25. E

    Loading curve for Power Transformers

    That's a great comminity here. Now I have a problem with ambient temperature rise. Let's describe the problem. For the power transformers the power of transformer is related with ambient temperature. And IEC 354 shows how it is calculate for a transformer . But its so complex and I couldn't...
  26. T

    Method of Energy Distribution Using Transformers

    Homework Statement Describe a method, based on the use of transformers, that you would use to distribute the energy to each home in a town. Be sure to give a precise description of step up and step down transformers. Homework Equations None. The Attempt at a Solution I'm not...
  27. S

    Magnetics of transformers and induction in metals

    If you have the primary and secondary coils of a transformer next to each other, then current will induce a voltage in the secondary coil, creating current flow. This question applies to motors as well. If I place a sheet of steel between the two coils, will I still induce a voltage? For...
  28. B

    Mutual Induction - Transformers

    I have a college assignment which asks: A transformer works on the principle of Mutual Induction. Describe how a transformer uses this principle to step up or step down voltage and current. Now i need to answer this question and hand the assignment in on Monday but since i have been ill...
  29. P

    Transformers and Power Transmission Question

    Please Help me to see if I've worked this correctly. Thanks! The primary coil of an ideal transformer has 720 turns, and the secondary coil has 180 turns. If the primary coil carries 15 A at a voltage of 120 V, what are (a) the voltage and (b) the output current of the secondary coil...
  30. D

    Explaining Toroidal Transformers & Their Self-Shielding Properties

    This question relates to 50Hz power toroidal transformers. Toroidal transformers are well known for their self shielding properties and consequently have a near-zero external field. Most of the magnetic flux lies within the core. Yet if one where to thread a good conductor through the...
  31. H

    How does the turns ratio affect the current and voltage in a transformer?

    I had trouble with transformers and ohm's law, and discussing it with friends, I got this out of them: I feel like I need to ask because I have (numerous times) accidentally used induced EMF in the formula V=IR, and therefore, end up with a different resistance in the primary and secondary...
  32. M

    Step down transformers & efficiency?

    My question is why the power efficiency % goes down with Voltage in step down transformers. The #of coils is less, therefore internal resistance is less too. Why the loss of efficiency in power? I hope someone can help
  33. S

    Clarification on Transformers - High voltage transmission

    I seem to understand transformers very well, but one aspect of stepping up voltage for transmission is confusing me. I'm sure it is a very small oversight on my part. In an ordinary electric circuit, when the voltage is increased, keeping the load resistance the same, the amount of current...
  34. M

    Nature of inductance, solenoids and transformers

    On wikipedia they give a fairly simply explanation of inductance But on http://www.electronics-tutorials.com/ they give a different definition I don't understand the latter there. Theyre saying any solenoid resists current and the higher the inductance the higher the resistance...
  35. B

    Free 3-D EM Software for Modeling Transformers and Mapping Poynting Vectors

    Does anybody know of free 3-D EM software so that I can model a transformer? In particular, I'm interested in mapping Poynting vectors. Thanks.
  36. L

    Electromagnetic Induction / Transformers

    Homework Statement A simple transformer is constructed by wrapping wire around opposite ends of an iron rod to form solenoids A and B. Solenoid A is connected to a 12-V battery and a variable resistor, while solenoid B is conncted to an ammeter. http://f.exoload.com/507/homework.jpg A. If...
  37. T

    Step up and step down transformers

    Hi, am I right in thinking that step up transformers are used to step up the voltage just before they are sent along the power lines to have a low current, which reduces loss of energy by heat. HOWEVER if you think of the equation Voltage = current x resistance, wouldn't the current have to...
  38. B

    I want to know if there are many development on transformers.

    I want to know if there are many development on transformers.
  39. J

    How Do Eddy Currents Form in Transformers?

    someone knows how eddy currents in transformers are produced? by friction , resistance or heat transfer? i mean the classical example is the wheel that is braked between the poles of an electromagnet, but how this applies to a transformer where there is exactly the opossed, a fixed conductor...
  40. B

    Solve Delta/Wye Transformer Questions - 22kV to 345kV

    Can someone point me in the correct direction to solve these... A 22 kV generator is stepped up to 345kV with a delta-wye transformer. The power is transmitted 100 miles over wires with a resistance ov 18.9mOhms/ft and an inductance of 2.51 microHenries/ft. The transmission is stepped back...
  41. S

    Design of HID transformers: HPS and MH

    This is my first post, and I hope I've found the right area to pose my question. As background, I don't have very much experience with HID applications, though I have extensive experience with general electrical wiring and systems design. My question is this: The difference between a metal...
  42. S

    Do transformers (110V-220V) drain much power?

    Hello everyone I have a 110V hardware plugged in at home (we use 220V) by way of a step down transformer and I was wondering if transformers 'use' more power than usual. I don't want a nasty electircal bill. Because even when the hardware is 'off', the transformer itself is still on. It...
  43. Omegatron

    Ideal transformers can pass DC, but real ones can't

    I only recently realized that ideal transformers can pass DC. Of course real ones can't. What's the difference? What is non-ideal about real transformers that prevents them from passing DC? Is it the fact that the flux is not linked perfectly between the two coils? Is it because the...
  44. Ahmed Abdullah

    How Transformers Work: Explaining Ohm's Law

    Ohm's law states that at constant temperature the flow of electricity through a conductor is proportion to the potential difference across the conductor. But It always appeared to me that transformers are indifferent to this law. Here, how it is. A step up transformer induce larger voltage...
  45. H

    Connecting multiple AC transformers

    Hi, I am a newbie so be kind :smile: I am trying to build a lighting rig using 6 x 12V/20W hallogen bulbs. I have 2 AC transformers each able to deliver up to 60W. Assuming both transformers are supplied by the same 240V AC input, is it ok to connect their outputs together in parallel to...
  46. J

    Transformers running with gain

    Hello, Are there any coil setups for transformers that when tuned or combined in weird ways run with gain? I heard that coupled inductors for CB radio antennas do this, but are there any effects similer to this for transformers? I heard an account from someone who said that two out of tune AC...
  47. J

    Magnetic induction in toroidal transformers

    Hello, If I take a small toroidal transformer and rotate a magnet over the top of it with the magnet's poles at 90 degrees to the coils, how does the presence of the permiable core affect the Lenz forces that are exerted on the magnet? Would the lenz forces be very small since the magnetic...
  48. J

    Transformers in Series, calculating the current

    I have been given the attached question by my mentor. I have used the standard transformer equations (Vs/Vp=Ns/Np etc.) but I am struggling to work toward the right answer. I am using 4 amps for question A (standard ohms law) but don't think I am tackling this right. As for current in the...
  49. C

    Transformer Winding Calculations: Primary to Secondary Current and Voltage

    Please can someone help me with his question A transformer has a 120-turn primary winding and an 1800-turn secondary winding. A current of 10A flows in the primary winding when the potential difference of 550V is placed across it. Find the current in the secondary winding and the potential...
  50. D

    Why did Transformers change their motto

    From "robots in disguise" to "more than meets the eye"? This was a bad decision.
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