Questions tagged [winding]

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5
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71 views

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 ...
4
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0answers
109 views

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 ...
3
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1answer
89 views

Is there any way to wind this 4 pole motor to behave as 2 or 8 poles properly?

I got an induction motor in a junkyard, a WEG motor made for an Electrolux washing machine. It is a single-phase 1/2 hp 4 pole motor. It runs in 127 V and has a 40 uf capacitor feeding the auxiliary ...
2
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1answer
104 views

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 ...
2
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0answers
93 views

What kind of monophasic induction motor is this?

About 15 Years ago I bought an induction motor from a junk yard. It have 6 leads being that 2 are the same lead, so 5. The guy who sold me had no idea from what machine it came. And I don't quite ...
2
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1answer
285 views

BLDC controller

I have to design a controller for three phase BLDC motor. In BLDC motor, for each hall sensor signal combination we have to to energize two sets of stator phases. But how to correctly identify which ...
1
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1answer
69 views

Ferrite Choke wiring, understanding the datasheet and how it affects the signal

I've been tasked with digitising an old analogue product for my company. I'm attempting to reverse engineer the analogue circuitry with no documentation (it was designed by an outside consultancy 30 ...
1
vote
1answer
101 views

swapping the ground reference on a transformer's secondary winding

I'm looking to build a [simple] high voltage power supply in order to make electrets via corona discharge. I'd like to be able to fabricate both positively and negatively charged electrets using this ...
1
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1answer
62 views

Shielding mains transformer to decrease interwinding capacitance

Has someone tried to shield mains transformers in order to decrease the interwinding capacitance? I have a transformer (toroid, power is about 5 VA,) and interwinding capacitance is a problem. As ...
1
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0answers
810 views

How to identify and wire leads on a one phase 6 lead, capacitor start, capacitor run electric motor

The leads are labeled U1, U2, U5, U6, Z1, and Z2. My research has found wiring diagrams on 4 lead motors where U1 & U2 are main winding and Z1 & Z2 are auxilary winding. Start capacitor wired ...
1
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1answer
253 views

For Brushless DC Motors would one expect harmonics to be different between Delta and Y stator windings?

Given two 3-phase brushless DC motors with the only difference being that one is wound delta, the other Y with center grounded, would I expect to see high frequency voltage-current harmonics to be ...
1
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2answers
311 views

Transformer windings order

I have several transformers for audio amps, with single thiner primary and dual larger area secondary windings, for lower voltage higher current. They are toroidal, all by different manufacturers, but ...
0
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0answers
40 views

Need help grasping the routing of coils for stator and rotor

I can see it with just a 3 coil motor, whether it be in different configurations, but loads of different motors have some 72 or umpteen different stator slots and winding for the rotor. It was my ...
0
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1answer
71 views

How to find the 120 degree phase angle in a single layered lap winding of a synchronous machine?

Ok, so I have a 4 pole synchronous machine with 24 slots meaning each slot has a phase difference of 30 degree with respect to each other. 1)That means pole pitch is 180 degree for a full pitched ...
0
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1answer
50 views

Is the formual for winding distribution factor and winding pitch factor for n-phase (intergal-slot winding) machine as 3-phase machine?

[] 1 In Image, alpha is the slot angle and eta'v' is harmonic-ordinal, q= solts per pole per phase [2]All book provide formula for 3-phase winding, and so far no material for n-phase winding. ...
0
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0answers
49 views

Can I improve the high-frequencies absorption of a ferrite inductor with two opposite winding directions?

A choke if effective against common mode currents by having two windings in opposite direction around the same core. Currents common to both wires produce opposing magnetic fields and get cancelled. ...
-1
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2answers
71 views

Linear variable differential transformer operation as load position feedback

I was doing some research on servo position systems and saw that Linear Variable Differential Transformers are used as feedbck systems that feeds the current load position to an error detector. So I ...