Windings Definition and 35 Threads

Hey, I was hoping for some help here. It's nothing major, I was wondering why the windings of a transformer are represented in such a manner as in the two following top-view cross-sections (I think) of the transformer. The main question is, normally it is just represented as a normal coil...

1) I have a "choke" with many copper windings on a soft iron core. I connect it to the 12V secondary of a mains transformer. I measure the voltage of the choke with a multimeter. What is the value and why? 2) I want to light up a 6V filament lamp. My supply is a 12V from a step down...

Hi, I have some question regarding windings on induction motors, if anybody can help. Reviewing some literature (*), the usual formulae to get the number of turns per phase of a induction motor winding is Eph= RMS phase voltage [V] Nph= number of turns of phase winding f= frequency [Hz]...

Good morning all! I have a quick question regarding high voltage transformers, can someone explain why we need to put the low voltage winding the closest to the core and the high voltage winding on the "outside"? Have a nice day!

In Simulation of transformer and electrical motors in software like ansys maxwell we usually have to model conductors, but does it matter how to draw them? I use Ansys software for finite element simulations. Maxwell, Simplorer, RMXpert and other toolboxes. but I always have a doubt on how to...

Hi folks, I'm searching for information/procedure and also calculations/equations on how to correctly wind a stator on a (general or DC 3-phase) brushless motor? I.e. how to wind a copper wire X number of times around the stators, and thus get the desired performance/force that is required...

Sirs, I have two honda clone 2.5KW/220VAC gasoline generators, one with AVR and another with Capacitor excitation. I want to modify alternator windings of one of them so that it can directly output around 55VAC which shall then be rectified and use it to charge 48V batteries. I have fair...

I have seen the following specifications in the Hurst motor data sheet. i have confusion on the Minimum DC voltage to the motor windings. It says as 10Vdc, but even if i give less than 10V it should not damage the motor windings. I can understand the upper voltage if i cross it may damage the...

I have always longed to make a system where I can get AC over a wide range of voltages. This system would help me test how my other experiments behave when they are powered from the mains. In order to get different voltages, I need to design my own transformer where the secondary has been tapped...

I have my field windings on the bench and it has a heavy and light wire wound in pareral there are three wires off the field windings . It looks like to me after testing switch with ohm metter positive turns on motor but when switch is in on position green wire off switch is not connected to...

Hi, I am going to wind an tapped toroid inductor for a LCR circuit in an equalizer. I have calculated the number of turns I need for each winding. This is my first time winding an inductor so I need to get some things straight. What to do with the 10 kHz tap, should I twist a wire with the 12...

I attach an image of something I am experimenting with. The picture itself (and added text) should be self-explanatory. 1) Which way should my windings (clockwise or counter-clockwise) go around P1; P2; P3 & P4 for maximum voltage (V) ? [ 1 Ø ] [ 1 x single enamelled copper conductor ] [...

I get given a lot of brush-motor tools that are "burning', as well as assorted other damaged electrical items. I'm not an electrical engineer, just a fiddler with some background in physics. Now, Jim Hardy and Tom.G have just walked me through testing a 12V alternator, which was found, as far...

I learned that brushless DC motor windings have an algorithm for winding depending on several variables... When I google image search BLDC stator, I expect to see this : But I see a lot more of this : Is this second one still a brushless DC? If so, do they just lose efficiency by winding...

Hello, I am a hobby machinist and also an EE PhD student. Recently I have been trying to make powerful solenoid actuators. I have succeeded, but they aren't perfect. I really want to make a professional, powerful solenoid. To give a sense of how deep I am going, here is what I have found so...

I'm taking physics 2 and was told to create a practical project utilizing electromagnetic force. Starting thinking about Lenz's law (which I just read in a textbook for the first time a week ago) and I thought it would be fun to send a pinewood derby car uphill instead of down. The sprinkler...

I have read that to increase motor magnetism that an increase in the windings increases the number of tiny magnets that can be used to provide the magnetic force. I have also read that increasing the cross section of the rotor increases the efficiency. Finally I have read that increasing the...

Has anyone ever heard of a rotor winding that can be interchanged with different shaft lengths? I'm trying to find a way to create a 3-phase alternator with a through shaft to attach pulleys on each end.

1. A solenoid of length 3.64 cm and diameter 0.914 cm is wound with 170 turns per cm. If the current is decreasing at a rate of 36.3 A/s, what is the induced emf in one of the windings? this is what I did: Length of the solenoid l = 3.64cm = (3.64...

The other day one of our power labs we were using rather large inductors; that is, approximately 10"x4" in the shape of a doughnut. There were 4 connections into the inductor. We connected a wire from one to the other, and then used the other two connections as any other inductor. Does that...

How many windings you have to reel up on a cylinder (length is 60cm and the diameter is 5cm) so that a Emf of 6mV gets induced if ΔI/Δt=1A/s? This is not my homework. I was doing this as a preparation. I know the formula: ε=-L*ΔI/Δt L is unknown. How to relate it to the windings, the length...

I want to use some motors i had laying around to do a project. A flick of the shaft measures 5MA. I want to rewind the motor so it produces 10ma. do I use bigger wire, or the same size wire just more of? less of or will I just have to

Hi, I've never done Physics before (bad choice I know :P) so forgive the question if it seems a bit noob. Do the windings in a brushless motor have to physically be in contact with the magnets in the stator? That is, can the windings be insulated? Thanks Jamie

what is meaning of ac winding and dc winding?how it differs from each other? advanced thanks.

A transformer is constructed with 200 windings on the primary coil, and 800 windings on the secondary coil. The primary coil is connected to a car battery with a potential difference of 12 V. After a few seconds, what is the voltage across the secondary coil? The answer is 0, but why? I...

So I was just reading about transformers from my textbook, and the textbook seems to state that when the resistance on the secondary winding circuit is infinite and no current runs through it thus the power on it P=VI is zero, then, according to the energy conservation law, no current runs...

when conductors are wound, they touch each other. why would the current flow through the spiral path when they can just jump on the next wire??

Homework Statement A simple generator has a coil with dimensions 1.0 cm x 1.0 cm which is rotated at 60 Hz in 1.0 T magnetic field. How many windings (turns of wire) are needed to generate a peak emf of 120 Volts ? Homework Equations 1. emf E = - d (magnetic flux) / dt 2. magnetic flux = (B...

Good Day, I have defective Aluminium windings motor. As you know Aluminium is very difficult to winding. So, I want to use Copper wire to re-winding the motor. How can I do that? What size should I use and what will be the number of turns? Someone told me that you can use...

Hello, I've recently read a couple of things about brushless motors that have spurred quite a few questions. Googling has solved some of them, but I'm hoping that you can help with the rest :smile: Apparently there are two types of permanent magnet brushless motors - DC and AC. This is...

Hello all. I am currently reading 'The Elegant Universe' and I'm puzzled by one key thing that is really starting to 'niggle' me! How can a one-dimensional string have multiple windings along a two-dimensional circular spatial dimension ("Garden Hose"). For this to be possible the string...

Can the wire windings in an electric motor be ferromagnetic and still operate? Why?

Homework Statement a tightly wound circular coil has 36.8 turns, each of radius .1m. the uniform magnetic field is in a direction perpendicular to the plane of the coil. the field increased linearly from 0 to .42t in a time of .251s. what is the emf induced in the windings of the coil...

What happens if you connect the following in this order: 1) from a battery to the primary in 2) from the primary out to the secondary in 3) from the secondary out to a motor 4) from the motor to the battery I know that transformers usually step up or step down the voltage, but it shouldn't be...

A model train requires 6 V to operate. If the primary coil of its transformer has 240 windings, how many windings should the secondary have if the primary is connected to a 120-V household circuit? V1/V2 = N1/N2 my teacher went over this with the class, and said that N2=...