Questions tagged [winding]
The winding tag has no usage guidance.
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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 ...
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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:
...
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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 ...
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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 ...
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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 ...
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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.
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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_{...
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Unusual problem in the motor starter (motor controller)
I am facing problem with a direct motor controller (motor FLA = 10.2 A), the motor starter means are: contactor (Schneider LC1E1210M5), circuit overload protection (hager AFP66H) and motor overload ...
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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 ...
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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 ...
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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 ...
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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.
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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 ...
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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 ...
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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 ...
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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?
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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?
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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,...
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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 ...
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Transformer Winding Resistance
I have a SMPS transformer and a LCR meter.
I can measure 3 different resistance on a winding:
R on a certain frequency(10kHz): 0.065R
Rs: 0.086(I don't know what is this)
DCR: 0.06
Which one is the ...
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How to limit current for a transformer?
So I've been winding and unwinding, all to get the current right but it's not going well, so I'd like to know how I can limit the current going into the primary side of my transformer, since the ...
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Number of windings keeping constant the poles
What happens if I increase the number of windings around the poles keeping constant the number of poles in a motor? for sure the rotational speed should be the same, I think that we will obtain a more ...
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In a transformer, how do you determine where the induced EMFs (E) and voltages (V) are placed in a vector diagram?
I will be citing pictures from Electrical Technology by Theraja.
So there are different cases with regards to the transformer depending on what losses and loads are considered. Each of them have ...
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Why does an additional primary current exist in a loaded transformer?
I think this has something to do with Faraday's Law but like, I don't get why having a secondary current produces a antiphase secondary current at the same instant. Not all currents produce a direct ...
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Building a pseudo-solenoid electromagnet - Heat disipation
I am planning to build an electromagnet as shown in the picture below. The copper windings are coiled around a thin plastic cylinder. The goal of the setup is to attract small metal chips floating in ...
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Current transformer energy harvesting from a mid-voltage line
I'm planning on harvesting energy from a 33kV line which has an average 10rms A current. The main conductor (N1) has a overall diameter of about 13mm.In the beginning I tried to harvest around 3-4 W ...
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Behaviour of flux in DC motor
In given figure if we assume both sides (up and down) with equal number of coil turns (N each).
And we wound(which generally we do in DC motor) coils such that they create flux and form a North-South ...
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Reducing equivalent self inductance of an inductor
Let's say I have a coil of N turns and it is wound on a rectangular core and when we connect a voltage source through both terminal of coil flux is generated in core , now I wanted to reduce that flux ...
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Inductor design
I really need your help on this.
I am designing an inductor which is rated for 50 A and 350 Vrms for 85 kHz. I want to get 3 inductance value from one inductor so I decided to tap between the points ...
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Electric grid power transformer winding: If it is milliohms, why does 9V DMM show infinite ohms?
When testing large MVA power transformers, like 66kV to 16kV, the winding resistance in DC ohms is milliohms.
It takes a high current supply to do this, then the V is measured across the winding to ...
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Winding arrangement in small toroidal mains isolation transformer
I got a 0.3A 220/220 toroidal transformer with the primary (red wires) on the outside and the secondary (black wires) on the inside.
What is the reasoning behind this arrangement in this particular ...
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Why duplex lap winding has twice as many current paths as simplex lap winding?
I found the statement of question on page 346 in the book "Electric Machinery Fundamentals, fifth edition" written by Stephen J. Chapman.
When I searched for how duplex lap winding looks ...
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Grinder hums but won't run. Capacitor seems good, and so do windings
My Grandpa gave me a bench grinder recently to fix. He said he was using it a lot, grinding and grinding, then he heard a pop, and it stopped working. Now it just hums, and starting it by hand doesn't ...
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