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Questions tagged [core]

The tag has no usage guidance.

1
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0answers
35 views

The resistance and magnetising reactance of the core

I did an experiment where I varied the test voltage and determine the values of the resistance and magnetising reactance of the core. What I noticed is that their values actually vary (not constant). ...
-2
votes
1answer
72 views

Is a stator another word for a soft iron core? [closed]

Pretty much a yes or no question. Would be greatly appreciated thankyou
2
votes
1answer
97 views

Magnetic circuit diagramming

What software makes magnetic circuit diagrams such as the one pictured?
0
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2answers
136 views

How to reduce the frequency of ferrite core transformer? [closed]

I am trying to do a inverter using ferrite core transformer, but the problem is the frequency output from the ferrite core transformer, If I am using that, I will be getting 230V AC but the frequency ...
2
votes
3answers
128 views

Solder Core Size

Pardon the very simple question, but I am a beginner looking to buy my first good solder for through hole work. I was looking at a 63/37 Kester 285 or AIM RMA, but one thing I’m curious about is the ...
1
vote
2answers
45 views

Can I create a continous gap in iron powder cores?

The iron powder core material, as you may know, has a continuous air gap in its structure. However, do you think it is possible to add a continuous air gap (for example 1mm) to the iron powder cores? ...
0
votes
1answer
55 views

Why the rotor core losses are very tiny compared to the stator core losses in an induction motor?

Book says rotor mostly runs at speed near to synchronous due to which the relative velocity between rotor and stator magnetic field is very less. Correspondingly making rotor core losses tiny and ...
2
votes
1answer
149 views

Winding a custom transformer with coil former

For a project I'm building a DC/DC convertor for converting 600VDC to 5VDC. Through the use of the TI Webench I was able to create a design, but it requires a custom wound transformer. The transformer ...
0
votes
1answer
189 views

is it possible to design a SD 3.0 controller in UHS-ii/uhs-i mode using simplified specifications?

I've been for while looking to store a sampled data up to the rate of 30MBytes/s, an SD 3.0 host controller core in uhs-ii/uhs-i mode fits the requirements. i'm not planning to buy SD full spec and ...
4
votes
2answers
388 views

Can cardboard be used as core of the transformer?

Can cardboard be used as core of the transformer? I read that core of transformer do not conduct current, induction produces current in secondary coil. So can cardboard be the core. How do it ...
0
votes
1answer
327 views

Inductor core loss for H-bridge type inverter [closed]

This is not a question about a specific circuit, rather this is a question about a concept. In a typical switching H-bridge type inverter, which currents contribute to the core loss of the output ...
1
vote
1answer
705 views

The effect of rust on a transformer core

I want to make a transformer with a core of laminated electrical steel sheets. I have some EI core sheets, 0.5mm thick. My design is for a gapped core transformer, and the shape of the gap is unusual, ...
0
votes
1answer
459 views

bonding laminated sheets in a transformer core with adhesive

I am building a transformer core out of laminated steel sheets. As I stack the sheets on top of each other, I need to use an adhesive to bond the sheets together, and I would like to ask the ...
1
vote
2answers
507 views

What if the primary coil of a transformer was connected without the iron core and the secondary coil?

I'm trying to create an electromagnet from a microwave oven transformer. The secondary coil will be removed, and the top of the transformer (The I in the E-I transformers) will be sawed off (to ...
0
votes
3answers
162 views

Can cutting electrical steel alter its magnetic properties?

Please forgive me in advance if this question is not appropriate here. If you think so - let me know and I'll take it down. However I am really hoping someone can share their thoughts! I want to make ...
1
vote
1answer
86 views

Field tests for veryfying stator core laminations loose in 3-phase, 3000 HP motor

We have a 4000 V, 3-phase, 366 A, 3575 rpm, 3000 HP induction motor that is making a modulated buzzing noise. The vibration in the horizontal planes of both bearing housings has increase from 0.1 IPS-...
0
votes
1answer
738 views

How to find Steinmetz parameters from datasheet?

Given a certain core material I would like to know where and how I can extract the Steinmetz parameter from its datasheet. Hope someone can help me out. Thanks. datasheet: https://en.tdk.eu/inf/80/...
0
votes
2answers
122 views

Is it 'ok' to use a switched power supply to power a processor core?

I'm currently working on a project which features an Analog Devices Blackfin DSP Digikey link. This DSP requires 1.3V to power the core. I plan on having my project be battery powered, thus I'm ...
0
votes
3answers
527 views

Change in transformer efficiency (leading power factor) with increasing load current

Does efficiency increase or decrease when the load current increases (assuming copper losses equal iron losses along with a leading power factor load)?
0
votes
1answer
317 views

Secondary voltage, lagging load power factor (transformers)

Theoretically in transformers, will the secondary voltage increase or decrease (with increasing load current and a lagging load power factor) and why?
0
votes
1answer
289 views

Will a 0.400mm thick PCB be too flexible?

My PCB will roughly have the following stackup: 35um copper foil (tracks) 100um FR4 prepreg 200um FR4 core 100um FR4 prepreg 35um copper foil (tracks) This gives a total board thickness of around ....
0
votes
2answers
2k views

Core losses in induction motor

Why is it like that if we increase the speed of the induction motor, its core losses decrease and stray, windage losses increase?
1
vote
1answer
396 views

Diagram symbol for an inductance with a neodymium magnet as a core

I want to know if there is such a symbol (i.e. an electrical diagram symbol for an inductance with a magnet as a core). If such is the case how is it specified the orientation of the poles of the ...
0
votes
2answers
848 views

Why there is welding on some iron transformers' core?

(This photo isn't mine!) Why there is welding on some iron transformers' core? is it only for holding the laminations together? edit can we repair or rewind this kind of transformers?
0
votes
1answer
145 views

Baseband Processor

If a device can only be activated by way of RF then I would tend to believe that the BB processor (embedded via ASIC design) would need to be active and powered on yes ? If correct then does it have ...
-7
votes
1answer
145 views

Intel Skylake CPU How does the primary or default core get powered on anyone? [closed]

Would it be by way of some hard coded cpu bootrom or by way of some ROM boot loader or some embedded firmware ? Anyone ?
1
vote
2answers
461 views

Ferrite core inductor for antenna

I am going to build the inductor in the figure above. I have a ferrite core with a relative permeability of about 70. Based on ARRL formulas, I have plenty of core length to separate the two coils ...
1
vote
1answer
176 views

Performance comparison of dual core and quad core processors with same TDP

Athlon X2 340 (dual core) and Athlon X4 740 (quad core) from AMD have same architecture and both have same TDP (65W). They also have roughly similar frequency. Does this means that at full load, the ...
0
votes
1answer
43 views

Can a secondary or additional core be loaded and made active (powered on) without via user application or a boot loader

Using any multi core IC such as the Qualcomm Snapdragon SoC as the platform. Can a secondary or an additional core (such as core1 or core2 etc..) be powered on and made active without via some user ...
0
votes
4answers
167 views

Can binary code such as an embedded OS or user application code be stored using silicon physical gates

Hello as the questions describes I'd like to know whether it's possible to do this ? Can binary executable code which is executed by a processor core possibly be stored using physical silicon gates ? ...
1
vote
0answers
83 views

ARM Multi Core SoC's

Is it possible for an additional core to have the same functionality and capability as the main core0 ? So two cores (core0 and core2) performing with the exact same responsibilities and capabilities ...
-2
votes
1answer
275 views

MaskROM Boot Loader for ARM Cortex Cores or Application Code?

Could someone clear the confusion whether the purpose of a MaskROM or just a ROM boot loader is to load and then start executing any secondary core1/core2/core3 (not master or primary core0) or does ...
1
vote
1answer
47 views

ARM Multi Cores on SoC's at Close Proximity

Could someone help me understand whether it is correct to assume that all ARM cores on a device such as a smart phone must be closely located on die for faster communications ? Otherwise would the ...
3
votes
1answer
187 views

How easy to indentify memory like ROM or EEPROM Flash Memory Areas of a Chip

Can anyone tell me would the memory circuit areas (ROM, EEPROM, SDRAM, Flash Memory) of the layers of a die belonging to a MCU and SoC IC's be relatively easy to identify compared to identify circuit ...
2
votes
2answers
235 views

Electromagnetic crane

I want to make a strong electromagnetic crane that would carry weights from one position to another. I am very unsure about the material. Do I use an old transformer? or What type of rods? What type ...
0
votes
1answer
112 views

Does the Northbridge Chipset IC have a “core” of some definition [closed]

Does anyone have any intimate knowledge of the design layout of the logic "core" found in the Northbridge chipset used in computer motherboards (desktop and laptops) ? This chipset is made by Intel ...
-2
votes
1answer
117 views

SoC Multi Cores and Boot Loaders

I have discovered that a typical SoC or MCU (multi core) have a boot loader which loads the bootstrap core. Could anyone tell me does each core require its own dedicated boot loader ? Is it possible ...
0
votes
1answer
178 views

Layers isolation in a Toroidal Core

I want to build a spot welder but I do not have a microwave transformer or any other big one, so I decided to make my own toroidal core by rolling a thin steel sheet. 1- Can I use galvanized steel or ...
12
votes
5answers
3k views

Can a transformer work if the core is not circular?

I am trying to build a transformer to convert 12V AC power to 5V AC. Here is what I have right now: I haven't adjusted the coil ratio yet but I tried it just to see if there would be any output and ...
3
votes
2answers
3k views

Is there a way to calculate the proper wire gauge?

I'm looking for the right copper wire gauge for my project. I've found several charts listing the maximum current that various gauges, solid and stranded, can transmit. The charts often disagree. ...
3
votes
2answers
793 views

Selecting the right ferrite core for high currents

I need to design some \$3.7 mH\$ coils for two low-pass filters and a \$5\mu H\$ coil for a boost converter. But am having some trouble finding suitable ferrite cores, since there will be a ...
0
votes
1answer
157 views

Looking for possible cause for poor regulation in self designed transformer

I am trying my hand at designing and winding my own ferrite transformer for a push pull 1000watts dc-dc converter from 10-12vdc to 400vdc, with copper foil of 0.3mmx30mm for the primary, and copper ...
0
votes
1answer
181 views

Why do Flyback Transformers have C-I cores?

Usual transformer cores are either E-I or E-E. What's the reason for Flyback's being only C-I? Does it simply cut the cost?? I want to know if it would perform less if it were an E-I.
0
votes
2answers
136 views

Coil and Core-What exactly this is?

Im learning about electrical measuring instruments(PMMC).In this textbook it is said that a rectangular coil is wound on a aluminium former.Inside which there is an iron core. My question is what ...
0
votes
1answer
322 views

using supermalloy as the core for wifi loop antenna

this is an extension of this question: Why aren't ferrite rod antennas used in WiFi? if you don't want to go through the previous question, then basically i was asking if we can loop wifi ...
20
votes
5answers
8k views

Can FPGA out perform a multi-core PC?

I don't understand how FPGA can be used to accelerate an algorithm. Currently I'm running a time consuming real time algorithm on a quadcore laptop so that four computations can be done in parallel. ...
0
votes
2answers
792 views

Transformer core maximum power

so i am an EE undergrad, and i am wondering if and how exactly does a transformer core limit its power capacity. From my understanding, the rated power of a transformer is due to the current carrying ...
0
votes
2answers
779 views

Transformer Core Area

I know it from my professor that for a general transformer like this picture if the core was a solid material its area would too big. Thus the core loss increases. To prevent this we use metal ...
2
votes
1answer
181 views

Magnetic core memory construction, and proper cores to use

I'm looking to experiment with magnetic core memory. I want to make a small magnetic memory module for use with a micro controller. There is a post on stack exchange itself that gave lots of relevant ...
-3
votes
1answer
663 views

Question about ideal transformer

Let's say that an ideal transformer has a rating of 500/125 V, 10 kVA. The source voltage applied to the primary winding is 525 V (rms). The load that is connected to the secondary winding consumes ...