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Questions tagged [winding]

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Why Does Current Flow Through the Neutral in a Wye Transformer Secondary?

I'm trying to understand the behavior of current in the neutral wire of a wye (Y) transformer secondary (EU residential wiring). Specifically, I'm curious about the following points: Does the current ...
A R's user avatar
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1 vote
1 answer
56 views

How to determine the correct direction of the transformer winding (photo)

I'm winding a transformer for a DAB converter. Image link (MDPI - A DAB Converter with Common-Point-Connected Winding Transformers Suitable for a Single-Phase 5-Level SST System): https://www.mdpi....
Delta's user avatar
  • 535
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0 answers
46 views

Why are these transformer windings used connecting the switch and the series pass regulator in this circuit?

I am looking into this multi-output forward converter and cannot figure why these highlighted windings are connected to the switching side. There's already an inductor to handle the recovery reset. ...
drnzd's user avatar
  • 11
7 votes
3 answers
1k views

Removing turns from a relay coil to make it work on a lower voltage?

I have a piece of machinery that was moved from a building with 240 V to a building with 208 V and all is well but the contactors don't seem to pull in all the way. Could I remove enough turns from ...
ElectronicsNoob's user avatar
0 votes
0 answers
27 views

Equivalent inductance seen from a winding

I would be having a little trouble understanding how to do this problem of magnetic circuits. It asks me to calculate the equivalent inductance seen from winding N2. I know how to calculate the ...
WalBol's user avatar
  • 11
1 vote
1 answer
63 views

How to convert the winding of a radial electric motor to a linear tubular electric motor?

There are winding scheme/calculators and tutorials online for conventional electric motors, but I can't find any clear method of wind linear tubular electric motors. For example, this is the winding ...
Fulano's user avatar
  • 370
0 votes
1 answer
31 views

Why is there a difference between the model primary and physical primary in a forward converter, but not between the secondary or tertiary windings?

In a forward converter, the current through the physical primary winding is the sum of the current through the magnetizing inductor and the current through the model primary winding. However, the ...
elvishpotato's user avatar
0 votes
1 answer
135 views

What is the relationship between the windings in a forward converter?

I'm trying to sketch the currents through each transformer winding of a forward converter. I also need to sketch the current through the source. I have a sketch of the current through the magnetizing ...
elvishpotato's user avatar
19 votes
2 answers
2k views

What is this flange with wire windings in a conical / horn shape?

I found this thing in a heap of stuff to be dismantled for recycling. There is a flanged chassis with winding wire rising up the wall, going along the rim, and diving back down, all this duplicated on ...
ariola's user avatar
  • 301
1 vote
1 answer
78 views

Transformer Design for a Series Resonant Converter

I am determining the Area-Product of the core required for a transformer to be used within a series resonant converter. The specifications are as follows: Switching frequency = 400 kHz Primary ...
Jonathan_the_seagull's user avatar
0 votes
1 answer
89 views

Does all the current lag the voltage in an inductor or is it only a small component?

the way I understood a basic inductive circuit (voltage source + inductor) is that all the circuit current (Io) lags the voltage by 90 degrees. However, I am following this blog tutorial to refresh ...
Baldovín Cadena Mejía's user avatar
0 votes
1 answer
57 views

Why would an in series-opposition center-tapped transformer not be used to drive a circuit?

I understand that if a center-tapped transformer is connected in series-opposition as in the image below, there would be no voltage across both circuit terminals. But can the individual voltage ...
Baldovín Cadena Mejía's user avatar
4 votes
3 answers
693 views

Flyback Transformer Winding Direction

Looking at the basic Flyback Converter Topology, the coupled inductor polarity should be opposite in order for the circuit to operate properly. However, I am confused on how to implement the correct ...
Gman's user avatar
  • 101
2 votes
1 answer
409 views

Why does my flyback transformer simply refuse to work?

I've been trying to create a Kirlian setup like the one in a video by 'The Plasma Channel', and the flyback transformer for the power source just refuses to work. I have a T1010A transformer, and I'm ...
Newfoundlander's user avatar
1 vote
1 answer
115 views

SMPS transformer power capacity and product of Area

I was working on the SMPS transformer and wanted to wind my own. For that I found the initial step of power calculation of the SMPS transformer. It stated to find the power using the products of area ...
kam1212's user avatar
  • 671
1 vote
2 answers
178 views

Coil winding direction in a shaded-pole motor (4-pole)

I have rewound a shaded-pole motor (4-pole). It's wound around the stator in a clockwise motion and around each coil in a counter clockwise motion. Is the winding being incorrect the reason why the ...
Thorin drake's user avatar
0 votes
1 answer
130 views

Flyback transformer manufacturing

I would like to build a flyback-converter that is presented in a research paper. The following information about the transformer have been provided: ...
Jenny's user avatar
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1 vote
0 answers
65 views

Is this the correct setting of short coil pitch configuration?

So I tried to visualize 12 slots 2 poles induction motor and I used a coil pitch of 150 degrees as is the convention. Each pole will use an interval of 12/2=6 slots. 6 slots is a complete electrical ...
İbrahim İpek's user avatar
0 votes
0 answers
45 views

I am winding a large induction coil but ran out of wire and need to solder or connect more wire to the existing wraps, how best to do this?

I'm winding a 6" coil with 16ga magnet wire. I want about 1600 turns but ran out of wire. What is best way to add more wire w/o creating a problem at the join, such as over-heating or creating ...
Jeff 's user avatar
0 votes
1 answer
99 views

Transformer winding direction

I am designing a center tapped transformer with 220V AC input and 12-0-12 V output. I am using a shell type core. I have a problem in choosing the direction for the turns in the centered tapped ...
user avatar
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0 answers
53 views

Faraday’s Law and voltage balance

Does anyone know how to use Faraday’s Law and voltage balance to explain this equation? I don't understand where jw comes from.
Jitter456's user avatar
  • 575
5 votes
2 answers
296 views

Help with (very) odd single phase motor wiring

I think this is my first post here. I have little knowledge on AC motors, and this machine I am servicing (an old Balltrap/Clay target shooting machine) left me baffled. The below diagram is a ...
garvamel's user avatar
1 vote
1 answer
48 views

What does float long and float short mean with respect to ferrite core transformer windings? [closed]

I have winding instructions for winding a EE13-06 ferrite core transformer, for secondary it's written 0.23 mm TIW, no. of wire = 1, no. of turns = 66, start = float short, finish = float long. What ...
Yogita Adhikari's user avatar
1 vote
3 answers
2k views

Why is the air gap important in a flyback transformer?

Why is the air gap important in a flyback transformer? How should we consider the equivalent circuit of a standard flyback transformer? If we are going to wrap all the windings of transformer to the ...
Burak's user avatar
  • 72
6 votes
2 answers
5k views

Three-phase motor Delta/YY connection diagram and windings troubleshooting

I am trying to troubleshoot this 1.4 kW three-phase motor and I'm unsure how its internal windings are interconnected or whether they are shorted. On the plate it says "Delta/YY 400 V", and ...
Robert Lee's user avatar
0 votes
0 answers
107 views

How can I calculate RPM for a DIY custom BLDC motor that works on 12/24 volts?

I'm working on a project where I'm designing a 12/24V BLDC motor. I have nine slots for winding and eight neodymium magnets. I used this for calculating the winding factor which is 0.94521 and winding ...
Akash Patil's user avatar
0 votes
1 answer
2k views

A single phase induction motor will not run without the capacitor. Is the main winding damaged?

I have a water pump motor (single phase induction motor) that used to work fine. Recently it will not start running when I close the switch but it will hum for sometime then it will start to run but ...
dev65's user avatar
  • 185
2 votes
1 answer
539 views

SMPS transformer datasheet specifics

Here is an excerpt from a typical ferrite switching transformer datasheet: This happens to be the Wurth 750311771. Questions: Two standard primaries are depicted on the left. This datasheet implies ...
rdtsc's user avatar
  • 16.3k
2 votes
3 answers
2k views

What is no-load voltage in a transformer?

From what "law" of transformers is the following equation for a practical transformer derived? I presume it is not V1/N1 = V2/N2, which only pertains to ideal transformers. \begin{align} V_{...
artist_and_not_EE_by_training's user avatar
0 votes
1 answer
205 views

How can I count the number of turns for this coil?

I am currently working on a project which deals with wireless power transfer. I am using a few coils to test out from Würth. The coil in question is the 760308100143. I wanted to find the coupling ...
EmeraldMonk's user avatar
2 votes
1 answer
192 views

Induction motor current higher at no-load than under load

I've just rewound a single-phase, 1/4 hp, 4-pole top-load washing machine motor identical to this one. It was originally wound in AWG 22 aluminum wire, and I rewound in AWG 23 copper wire, which ...
user2934303's user avatar
0 votes
3 answers
248 views

How do I find the rotation direction of a single speed, single phase universal 120VAC electrical motor?

Specs: 5hp 16 Gallon Rigid wet/dry shop vac household type Serial Number: 09270 R 2217 Model: WD16360 120V 10A. 60Hz Motor: M188306380002 09241 AD U79-251200-001E01 120V 60Hz PROBLEM SUMMARY: I ...
LVX-001's user avatar
2 votes
1 answer
109 views

Rewinding a 6 V DC motor and decreasing inrush current

I have a small simple 6 V DC motor and I would like to rewind its rotor. The motor has 2 magnets. The rotor has 3 poles to wind. Normally each part has 169 turns of winding with 0.15 mm2 copper wire. ...
Elentronics's user avatar
0 votes
0 answers
103 views

BLDC winding architecture

I was dissecting an out-runner BLDC - 24s28p configuration. I came across a winding pattern I've not seen before. Unwinding one tooth I counted 7 in hand for 8 turns clockwise, and it continued onto ...
Jedi Engineer's user avatar
0 votes
0 answers
31 views

Can I rewind a 4-pole motor to be a 2-pole motor with the same design voltage? [duplicate]

I had a 4-pole motor whose winding was irreversibly damaged and I had to cut it off. I was planning on rewinding it exactly as it was (I measured everything before cutting off), but then I stopped to ...
user2934303's user avatar
1 vote
0 answers
850 views

Number of turns needed to rewind a 4-pole motor as 2-pole

I'm wishing to rewind a 4-pole, 1/2 cv motor as a 2-pole motor for the same voltage rating. Its stator has 32 slots, and the main winding looks like this: It's a concentric winding, made of 4 ...
user2934303's user avatar
1 vote
1 answer
77 views

Nodal admittance matrix of a winding

I have a question concerning the nodal admittance matrix of a winding that has n turns. If each turn of the winding had its own model, is it possible to consider my winding a n-port network?
Wallflower's user avatar
2 votes
1 answer
133 views

implementing dot convention

in the following topology, a boost inductor with secondary winding is operated in which the windings are in opposite directions. Implementing this structure, in reality, made me confused. Based on my ...
WeTech's user avatar
  • 735
1 vote
2 answers
433 views

3-phase motor winding heater using DC current

The motor in use is a 3-phase 440V/37kW induction motor. I have received data regarding winding heaters from a motor manufacturer. If the rated voltage is 440V, a single-phase voltage of 24Vac must be ...
wooyoung kim's user avatar
0 votes
1 answer
61 views

Why isn't wave winding a DC generator like shorting two voltage sources of different potentials?

Say each conductor moving in a magnetic field produces EMF \$e\$. In the below setup, the first parallel branch has 5 coils (5,9,4,8,3) and second branch has 4 coils (1,6,2,7.) This means, at a ...
across's user avatar
  • 1,150
0 votes
1 answer
76 views

Does this motor ever run?

I've been studying lap winding in dc motor and the geometry is quite interesting. I stumbled on below arrangement of coils for a 4 pole 4 slot double layer simplex lap winding. My thoughts: This ...
across's user avatar
  • 1,150
0 votes
1 answer
266 views

DC motor, disadvantage of having independent coils

My knowledge in electrical motors is not that good. In first pic, when the coil is vertical, torque is \$0\$, but inertia keeps it spinning counterclockwise. I get this. With only one coil, the ...
across's user avatar
  • 1,150
1 vote
2 answers
228 views

Is there any effect on efficiency of electromagnet if winding wire cross each other during winding?

While winding a core of the transformer some turns cross other turns. Will this affect the magnetization produced by the core?
Shivam Kumar's user avatar
1 vote
2 answers
244 views

Rogue winding on flyback transformer?

I was reverse engineering a battery charger (Lidl brand Parkside 20V battery charger PLGS 2012 A1, with smart functions, among them charge current and termination voltage settings) and came across ...
parkside's user avatar
  • 847
0 votes
1 answer
99 views

How is current distributed in the cross-section of a wire? Skin effect for motor windings?

The startup h3x is claiming to have designed 3d printed coils and other innovations increasing the power density of electric motors by a factor of 3. https://www.h3x.tech/#amcoils They mention fill ...
Dov's user avatar
  • 1,671
1 vote
1 answer
396 views

Measuring turn ratio of a transformer

I've taken out a beafy transformer with 8 leads from PCB of a multimedia device of some sort. (Possibly a TV). 2 leads are obviously the primary coil (thicker leads and wires) the rest are almost same ...
Elementronics's user avatar
6 votes
3 answers
700 views

Why so much space around these toroid windings?

I have recently noticed some toroids wound with what I consider to be huge space left over, and I am asking if there is any good reason to do this. (or even an acceptable reason would do). My thoughts ...
MicroservicesOnDDD's user avatar
1 vote
1 answer
331 views

Determining an industrial electromagnet coil's number of turns and wire diameter, etc

I'm a new graduate and fresh hired Electrical Engineer who works in a company building magnetic separators for general industry (including mining, recycling etc.) Normally, we build magnetic ...
Mert Ünlüsoy's user avatar
4 votes
2 answers
940 views

How frequency-dependent is an air inductance?

For a winding on a magnetic material, the value of the inductance is greatly impacted and is also frequency-dependent given the behavior of the magnetic material according to frequency. My question is,...
Wallflower's user avatar
2 votes
2 answers
196 views

Is there any good way to limit primary current on a low inductance transformer?

For a while, I used hand wind transformers to make high voltage (250v, then several stages of cockroft walton to 750-1000v) from ~12-24v at around 10khz and max 100ma on the primary side. But of ...
kecske3141593's user avatar