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.
Due to the fact that I don't have any plans on damaging my chargers (something I am not planning to risk at the moment) I have not been able to confirm whether the transformers in chargers act as a load when nothing is charging. From what I have read, based on the design of many chargers, even...
Homework Statement
It is required to transfer an electric power of 80. Kilowatts from a powerstation to a factory which is at 2 km from it.If the potential difference (here it means the voltage of the source) at the station is 400 volts and the resistance of 1km of the 2 conducting wires is...
Hello!
I'm still not clear on a few things:
For example: Let's say a manufacturer creates a device which runs at 120W (let's say a lightbulb). Does this mean that i can use which combination of voltage and current such that V*I=120W i want?
Another example: Let's say that the maximum...
transformers -- Don't understand VpIp = VsIs
Homework Statement
If the equation below of any transformer is true, therefore it does not matter if i connect a lightbulb or anything else either to the primary or the secundary, it should be working the same, right? I have a 220v-3v step down...
Homework Statement
A 50 KVA,6360 V/230 V transformer is tested on open and short-circuit to obtain its efficiency,the results being as follows:
O.C.:
Primary Voltage-6360 V,
Primary Current-1 A,
Power Input - 2 kW
S.C:
Voltage across primary winding-180 V
Current in secondary...
Hi, I'm trying to figure out what phase differences take place with an ideal transformer. This is what I have figured out so far:
If you apply an AC current to the primary coil then you will get an alternating flux in the primary and secondary coils simultaneously therefore the fluxes are in...
If you apply 100 volts to a 10:1 transformer you will end up with 10 volts out. If you put a 10 ohm resistor on the secondary you will have one ampere passing through the resistor. That's it !' Why do I have to apply energy conversion equation to find the intensity it seems meaningless, why...
Homework Statement
Hey there! I have simple problem:
To start a spark in a car ignition system, voltages of 5-17kV are required. A transformer with winding ratio 1:100 is used with a 12V battery, so we get a 1200V voltage. How are higher voltages achieved in such systems?
Thanks
the law of the transformer states that
in primary coil , the EMF = -n multiplied by the rate of change of flux with respect to time
but that law applies to induced EMFs , and since the voltage in the primary coil is not actually induced but rather produced by an external source of A.C , then...
Homework Statement
We have a transformer with the primary coil carries 120 V and the secondary coil having 6 V. If you change the second coil to have 8V, what is the voltage in the primary coil?
Homework Equations
My textbook does not have any equations that involve just the voltage of...
Homework Statement
We have a transformer, the primary coil has 120V and secondary coil has 6V, if you put 8V in secondary coil, what will be the voltage in the primary coil.
Homework Equations
v1/v2 = n1/n2 where v is voltage and n is turns
The Attempt at a Solution
So i was...
Hi,
I'm trying to comprehend the idea of why the induced current of a transformer decreases as voltage increases. Is this in terms of an increased applied voltage? I know that if you have a high applied voltage through the primary coil, if it has a high number of loops, this will cause for a...
Can anyone explain why saturation current and flux leakage are not related?
saturation current = current where all the magnetic domains are aligned right?
flux leakage = flux from the primary that doesn't reach the 2ndary
can someone also explain why, flux leakage causes a increase in...
I had a new slot car race track with step down transformer given to me by my Grand Parents for a birthday present.
One thing I did notice, is the car with the lowest internal resistance motor used to go faster, well that's what my Dad told me at the time. I found this to be very true on a...
Transformers -- Why output current decreases for step-up xfmr?
So I've been wondering if anyone in PF could explain to me the reasons currents can either increase or decrease in a transformer depending on the wiring.
I understand electromagnetic fields/forces, magnetic flux, and I even could...
Hello Guys !
While Studing coupling transformers i found this problem
i tried to solve it
but i don't know if my solving is right or no !
so tell me :)
The problem :
My solve is :
V(out)=nV(in)
V(out)= 2 * 312 = 624 v
PIV = V(out) = 624 v
and if the diode is turned...
Hello,
This is my first post, so I hope this is in the right section and format.
I've looked all over the web, but I can't find anything that addresses my question clearly.
I know that for an ideal transformer to not lose any power, the turn ratio has to be the square root of the...
Hello,
I am currently working with mono phase transformers. I would like to know if there is an equation to calculate the voltage when the core saturates so I can compare with my practical results with.
Thank you very much
João
Hello,
Is it true that when using transformers and three-phase drives/VFDs for induction motors, the transformer's power needs to be much higher (e.g. +40%) than the drive's in order to avoid increased harmonics (or even other problems)?
If you know any official standard, paper or...
I know of multisim, but that is mostly fo rlow voltage applications. I need a schematics program like multisim, that has models of big transformer stations, current transformers, fuses, circuit breakers etc.
Anyone of you who knows of a tool like this?
Dumb question - if the phases are tied together in a three phase delta transformer why don't the phases short out against each other in the same way the transmission lines would fault phase to phase if the touched each other in the overhead? I think I understand the wye winding situation in...
Every time I walk by the electrical transformer at the end of the lane, I hear a low humming noise(≈50Hz) that is continuous. I have observed this in all types of fans. I grab the hub so that it is not able to rotate and switch it on. Then I hear this hum. When the mixer/grinder chokes, it...
I am starting to learn about transformers, and know the basics: they use electromagnetic induction to induce a current in a secondary coil, and the voltage and amperage of that second coil are dependant on the voltage and amperage of the first coil, and the ratio of turns in each coil.
So...
transformers -- winding resistance and leakage reactance
Does anyone know what is meant by:
'determine the combined winding resistance and leakage reactance referred to the primary side'?
Homework Statement
I have got this scheme:
Alternating voltage V = 120 V,
Total resistance of wires Rw = 0.6 Ω
Current is 100 A, ratio 1:5 and 5:1 (as we can see it in the scheme)
Have to calculate dissipated power in the load (Pl), dissipated power in the wires (Pw), total dissipated power...
Looking for a recommendation of a book I can take out from the library at my University. I am looking for a book that has questions & answers (even or odd) to circuits involving transformers. I currently have a textbook with problems, but it has no answers. I find it rather pointless working...
The hysteresis iron loss is give by Ph = Kh*f*Bmax^1.6
And eddy current loss is given as Pe = Ke*f^2*Bmax^2
At first it appears both loss increase with frequency (f) but recognizing that for fixed magnitude of applied voltage, Bmax = k/f , we can see that Pe remains constant and Ph decreases...
transformers -- question about number of phases used
why often single phase and three phase transformers are widely used rather than other phases like four,five phases
Can anyone please clarify if the current in the primary coil of the transformer follows V(s)I(s)=V(p)I(p) when i am trying to figure out the peak, surge and average current through the primary coil of a transformer in a full wave rectifier.
Also, if it does, do I just use the peak voltage or...
How is that two hot phases can be put into a transformers and it not blow up? i have asked this question many different times to different engineers at work and I'm tired of hearing "just because". please explain in detail
Hi there,
I've got a fairly simple question theoretical question about transformers and I suspect it stems from a misconception I have about them. I understand that step down transformers can be used in situations where a high current is desired but that they also reduce the voltage in the...
Homework Statement
the smal transformers that power many consumer products produce a 12.0Vrms, 60hz EMF. design a circuit using resistor and capacitors that uses the transformer described above as an input and produces 6.0 Vrms output that leads the input voltage by 45 °
Homework...
Hi,
Can somebody answer this question?
The induced magnetic field of the secondary coil opposes the magnetic field of the primary. Therefore there is a lower magnetic field on the primary - lower impedance and a lower voltage drop. This results in an increased primary current which will...
How we speak about the coil of primary in phase of a versus secondary coil
this is accepted (as there is on same core)
But question about
we say this transformer (ex) is vector group Dy11
that means phase difference between primary and secondary voltage is 330 angle
!
It's conflicted...
Hi folks,
I'm a Mech Eng who is trying his hand at some Electrical design so please forgive my ignorance.
My set-up is as follows: I have a 3 phase source powering a 3 phase induction motor. If I then went half way along my power cable and put a separate current transformer on each of the...
There is probably a very simple and obvious answer to this question, but right now it's just not clicking for me. So, perhaps someone else can help me out.
Context:
The typical undergrad intro to the Aharonov–Bohm effect is that it is an intrinsically non-classical phenomenon because an...
My first question is with the relationship between current and voltage. I understand how they are related mathematically but not conceptually. Why would increasing voltage decrease current if the resistance stays the same? Why couldn't the current increase if there is more "push."
This leads...
Hello,
Suppose 2 single phase transformers have the following:
T1 T2
Rated Current 200A 600A
Resistance(pu) 0.02 0.025
Reactance(pu) 0.05 0.06
No-Load emf 245V 240V
What is the terminal Voltage when they are connected in parallel and supplied a load impedance of...
Hi,
What does rated output in a transformer signify?
Is power same(or almost same) on both sides?
In short circuit test, we apply reduced voltage to HV winding so as to circulate rated current in HV. This will cause rated current to flow in LV. But as per definiton of rated current...
Homework Statement
Ok so i was doing my revision for my exams and i was reading on transformers and they said that stepped-up Voltages and stepped-down currents minimizes for tranformers I^2R power losses in the transmission cable. I know that current is decreased, but a higher voltage, by...
What type of software?
Hello everyone,
I'm looking for a simple software program that I may be able to configure coils, inductors, transformers, core selection etc. Basic ic availability, selection of switches, LEDs, types/strenghths/shapes of permanent magnets. I'm aware that there is a lot...
How are described in the Industry those transformers able to operate with a variable frequency?
These transformers will be used downstream of a Frequency Drive.
Anyone knows?
Any specific characteristics?
Thanks
So I know transformers work by mutual inductance. A first loop that is connected to AC current produces an alternating B which produces a changing flux. As a result an induced Emf is formed. This Alternating B is also alternating in the second coil as well to produce same emf (if same number of...
Hello,
Suppose a simple transformer, not connected to a circuit (just to the home AC). If we get a multimeter and measure its resistance we will get a number. So if we plug it into the home AC, it will consume energy (constant power).
Now suppose we have a desktop computer power supply...
I see a lot of these transformers that claim to do both step-up and step-down in the same unit. At least one had a photo of the back side and there was a switch labeled to set it according to the input voltage. What I am curious about is how these are wired. Are they isolation transformers or...
Homework Statement
65 kW is to arrive at a town over two 0.100 ohm lines. Estimate how much power is saved if the voltage is stepped up from 120 V to 1200 V and then down again, rather than simply transmitting at 120V.
2. The attempt at a solution
First I want to find the power lost in...
This question about the variation of the aforementioned quantities in a transformer.
Now according to me and my knowledge of electricity this is how I feel it should play out :
If the input current were a sine curve that varies with time then :
Input voltage = cosine curve i.e. it is...