1000 Threads found on edaboard.com: Coil Measurement
Is there a recommended way of measuring the parasitic capaictance of an inductor coil or planar inductor?
Any advice is appreciated :)
Analog Circuit Design :: 03-24-2006 04:58 :: Catalyst :: Replies: 2 :: Views: 1423
I've a little practical question.
I've measured in anechoic chamber the input impedance of a coil loaded monopole resonating near 487 MHz. I've calibrated the Network Analyzer up to the point where I've attached the antenna. My need was to determine the input impedance of the antenna so I take a measurement of the magnitude and of the phase o
Electronic Elementary Questions :: 05-23-2006 03:33 :: ifelix :: Replies: 0 :: Views: 574
When the contactor is in open state, the inductance of the contactor coil is low so that a higher current will pass through it (as there is an air gap in its magnetic path).
When the contactor is closed, the inductance of the contactor coil increase so less current is passed through it (since there is a smaller (or no!?) air gap in its magnetic
Electronic Elementary Questions :: 04-20-2009 05:50 :: thomaslg :: Replies: 1 :: Views: 3023
It should be noted, that the suggested "transformer" doesn't behave like a ususal current transformer. In the frequency range of interest, the said "proportinate voltage" is actually proportional to the current differential di/dt. It must be integrated to achieve a frequency and waveform independet current measurement.
Furthermore, the coil isn'
Analog Circuit Design :: 05-15-2009 01:37 :: FvM :: Replies: 6 :: Views: 3945
How can I measure the impedance of a small coil like the attached photo? coil is 2mm coper wire located inside a quartz tube (4 mm diameter for water cooling). coil diameter is 2.5 cm and lenght is 2.8 cm both like this and while plasma is ignited and coil is
RF, Microwave, Antennas and Optics :: 09-29-2009 02:27 :: steve_rb :: Replies: 5 :: Views: 1206
anyone know what's important we need to calculate single layer air coil inductance
and how to calculate air coil inductance?
Electromagnetic Design and Simulation :: 01-04-2010 02:41 :: kyg :: Replies: 1 :: Views: 2332
I could be way off on this, but it seems that if you want to measure current, wrap a coil around the hot wire and measure the induced voltage. With a current from 0 to about 2.5 amps you should have no problem measuring a voltage.
Analog Circuit Design :: 04-22-2010 22:50 :: eanema :: Replies: 6 :: Views: 1780
how can i measure the inductance of a coil .
Analog Circuit Design :: 04-29-2010 13:29 :: judfid :: Replies: 6 :: Views: 1777
i actually did this once, for 600V bridge with 100A throughput. i used rogowski coil as FvM suggest (the green sense wire comes in all sizes). it only measures AC current, so keep that in mind, but it has huge bandwidth.
the voltage measurement is tricky.. especially if you want accuracy. the voltage is dynamic and in a high noise environment
Power Electronics :: 10-12-2010 19:53 :: Mr.Cool :: Replies: 11 :: Views: 876
I'm under the impression, that the pulse CX2041NL may be better suited for 10 MHz range than mini-circuits TCM1-1 due to it's wider frequency range. But basically each of them should work, if you apply standard open/short/load calibration at the transformer secondary. A general problem with balanced network analysis is the unknown common mode to di
RF, Microwave, Antennas and Optics :: 03-31-2011 17:34 :: FvM :: Replies: 6 :: Views: 1863
A coil placed near the motor might pick up a sinewave by induction.
You might have to experiment with different types of coils (low vs. high inductance, containing iron vs. containing none, etc.).
You might have to try it in different locations (near windings, near an opening in the housing, etc.).
Professional Hardware and Electronics Design :: 06-22-2011 05:02 :: BradtheRad :: Replies: 4 :: Views: 1255
Please see whether this paper from coilcraft is helpful.
Electronic Elementary Questions :: 12-09-2011 06:37 :: mvs sarma :: Replies: 7 :: Views: 3062
I know the wattage of the coil is 200 watt and the resistance of the coil is 500 ohm and it works on 24 VAC
The numbers don't go together at all.
A "coil" (solenoid valve, relay or contactor coil) will expose an AC resistance larger than the DC value. In any case, the current for 24 VAC can't be larger than the (...)
Electronic Elementary Questions :: 04-25-2012 06:22 :: FvM :: Replies: 6 :: Views: 553
As you should learn and then find a solution, I can recommend the easiest way (I also worked with shaking tables).
Connect an analog sensor to an oscilloscope. Shake the table to see sensor response.
As a sensor, you can use a piezo element coupled to the table and its base so it can be lightly bent by shaking.
You can use a coil with a magnet cor
Analog Circuit Design :: 09-27-2012 05:57 :: jiripolivka :: Replies: 2 :: Views: 374
I need measure current on HV line, voltage on line maybe 0-10kV , current 0-25A, pulse lenght order of ten us.
I thing about Rogowski coil, but I could find no guidance on the design Rogowski coil.
Number of turn?
any matematic about Rogowski coil?
Analog Circuit Design :: 11-04-2012 06:14 :: Scheldoniq :: Replies: 1 :: Views: 565
I have a nice volt meter with AC current measuring installed on the boat.
I have dual 30 amp shore power.
I was thinking if you had a switch, you could toggle between sources.
The current transformer looks like a ring and I think it has an iron core wrapped with some small copper wire.
How would you make or can you buy or adapt some other c
Electronic Elementary Questions :: 11-08-2012 06:57 :: sdowney717 :: Replies: 2 :: Views: 410
CT1248 isn't a rogowski coil, it's a conventional current transformer. What are you asking about?
In case you are asking about rogowski coils, there's no current ratio. Rogowski coils have an output voltage according to the primary dI/dt, the sensitivity depends on the number of turns, coil length and area. See
Electronic Elementary Questions :: 01-27-2014 03:42 :: FvM :: Replies: 5 :: Views: 457
You are measuring the voltage without any current flowing. The wiring has bad resistance that causes the voltage to drop at the relay coil when current flows. Measure the voltage at the relay coil when it does not work and you will see the voltage is dropped by bad wiring. Maybe it is a rusted connection to the car frame.
Electronic Elementary Questions :: 06-28-2014 17:31 :: Audioguru :: Replies: 5 :: Views: 357
Web based calculations.
Car Audio: Passive Crossovers/Capacitor & coil Audio: Passive Crossovers
Index of Calculators, Charts, and Diagrams
Professional Hardware and Electronics Design :: 09-17-2001 03:38 :: Robin Hood :: Replies: 0 :: Views: 2906
Single/multilayer coil designer
RF, Microwave, Antennas and Optics :: 09-17-2001 06:52 :: Robin Hood :: Replies: 0 :: Views: 2238
RF, Microwave, Antennas and Optics :: 09-17-2001 07:18 :: Robin Hood :: Replies: 0 :: Views: 2248
I need IEC 60244 (or IEC 244 or EN 60244) "Methods of measurement for radio transmitters" for review.
I dont known which part I need exactly.
Professional Hardware and Electronics Design :: 04-03-2002 07:13 :: donotknown :: Replies: 2 :: Views: 2294
im using micro-controller MSP430F1121 ,135 and 149 from TI. just now im doing current measurement for MSP430F149 with MSP-FEt430F140 evaluation kit LPM4 mode we found its consuming 5.6 to 6.3 uA current. I found that MSP430F135 consuming 5.6 to 6.3 uA current. But if Im using the same source code to test MSP430F1121 it consumes 0.1uA c
PC Programming and Interfacing :: 07-02-2002 09:20 :: niks :: Replies: 6 :: Views: 1557
Does somebody have ideas where I can get the information about eye pattern?
Professional Hardware and Electronics Design :: 07-12-2002 20:47 :: ninor :: Replies: 12 :: Views: 7739
i want to measure the inductace value.currently im trying to feed to oscillator and then measure the feq. can anyone suggest me the ckt which ll b STABLE. Let me know.
Other Design :: 07-15-2002 12:01 :: niks :: Replies: 2 :: Views: 2339
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Software Links :: 01-20-2003 00:49 :: vsupachai :: Replies: 0 :: Views: 1118
I'm looking for information on coil winders for lvdt's.
Professional Hardware and Electronics Design :: 01-22-2003 01:11 :: dz :: Replies: 1 :: Views: 838
anyone have idea
Hobby Circuits and Small Projects Problems :: 01-22-2003 12:24 :: mihotron :: Replies: 9 :: Views: 3121
How can P*otel?
I advice u u read a bit this document. With protel only, it might be hard... :)
And I heard that this "method" need several prototypes and component implementaton can cause difference as well.
Like I've seen something on the inet :
PCB Routing Schematic Layout software and Simulation :: 01-25-2003 10:03 :: incognito :: Replies: 10 :: Views: 6228
How can we measure the antenna gain in-house ? Assume we only have reference dipole, signal generator and spectrum available only measurement.
RF, Microwave, Antennas and Optics :: 01-26-2003 06:20 :: Rayengine :: Replies: 6 :: Views: 1366
8) SHT11 ILE SICAKLIK+NEM
Robotics and Automation Forum :: 02-02-2003 21:21 :: HN :: Replies: 95 :: Views: 73666
Recently , I begin a project for RF Impedance measurement,
Specially for antenna impedance. I plan use a wisdon resistance bridge to
measure gain&phase data.
analog device inc's ic ad8302 look like a good choose for this design,
who can give me some advice?
RF, Microwave, Antennas and Optics :: 02-10-2003 08:02 :: oven :: Replies: 5 :: Views: 2981
I need 1 chip for Energy measurement, to connect to one 51.
Or 1 circuit.
Professional Hardware and Electronics Design :: 03-06-2003 13:18 :: iberia :: Replies: 2 :: Views: 844
Phase noise and AM noise measurement in the frequency domain
RF, Microwave, Antennas and Optics :: 04-14-2003 09:15 :: HO_220 :: Replies: 0 :: Views: 1512
the attached file discribed the various type of power measurement in rf and microwave circuits.
if anyone has a new method please send for me.
in soon we will present a new method for power measurement in RF circuits.
RF, Microwave, Antennas and Optics :: 04-15-2003 10:43 :: HO_220 :: Replies: 4 :: Views: 1791
The energy stored in the coil has to be distroyed in the protection circuit.
If you use a diode (DC coil) the reverse voltage will be low (0.7 volts) and
the time the current flows is relatively long. If you allow the voltage to
go higher (e.g. with a varistor), the same energy can be distroyed in a
much shorter time.
A lossy RC-n
Hobby Circuits and Small Projects Problems :: 05-28-2003 15:01 :: mr_ghz :: Replies: 4 :: Views: 1629
Does anyone have any nfo on manufacturers of precision coil winders?
Robotics and Automation Forum :: 06-01-2003 04:23 :: dz :: Replies: 0 :: Views: 1264
How to make a SHUNT for 5A current measurement. The application is a power meter whereby the current from a CT is 5amps and has to be fed to a SHUNT to convert to voltage for measurement by an AD77xx series IC.
I have tried using Nichrome wire but it is not solderable. Using Iron or other metals with high R, there is a problem with high tempera
Professional Hardware and Electronics Design :: 06-03-2003 05:36 :: techie :: Replies: 9 :: Views: 1597
Anybody know .... just in
Software Links :: 06-09-2003 05:01 :: textik :: Replies: 6 :: Views: 1639
Does anybody knows a software for designing strip coil antenna and calculating its inductance?
Thank you in advance
Professional Hardware and Electronics Design :: 06-10-2003 09:39 :: hayder78 :: Replies: 0 :: Views: 913
I wanna FM transmitter diagram with only strip coils (I hate ordinary coils). Can anybody help me? Can anybody give me a url for a freeware which designs a coil as a strip in a pcb?
If you need some help let me know may be I can help you.
Thanks a lot everybody.
Professional Hardware and Electronics Design :: 06-10-2003 09:40 :: hayder78 :: Replies: 0 :: Views: 1324
I am looking for websites which have structured tutorial and/or reucational information on Instrumentation & measurement.
Robotics and Automation Forum :: 09-05-2003 00:53 :: bharundi :: Replies: 3 :: Views: 1342
i would like to test whether a coil (inductor) is connected in wrong side .... how to do that?
the coil is actually on a harddisk arm (the read head).... there are two tiny pins connecting the start and end of the coil. sometimes they are connected wrongly...
Professional Hardware and Electronics Design :: 09-09-2003 09:49 :: weiwei2 :: Replies: 10 :: Views: 3265
hi, in our measurement sustem course, we are required to build a measurement system. can anyone help me.
Professional Hardware and Electronics Design :: 10-06-2003 04:30 :: hassnan :: Replies: 2 :: Views: 1694
I am student of PHD physics and I want to
make a Magnetic feild in 27Mhz frquancy in a coil with 5uF inductance
for my project . it for plasma gas .
but I dont know How can I make matching between coil and 50 Ohm transmission line !!
because if I used a capacitor parallel with it for canceling reactance coil and (...)
RF, Microwave, Antennas and Optics :: 11-10-2003 09:03 :: abifar :: Replies: 3 :: Views: 1869
I am looking for a good example doc/pdf/.ppt for taking antenna measurement with HP network analyzer.
i.e transmit/receive only with Network Analyzer
Thanks for your kindly help in advance.
RF, Microwave, Antennas and Optics :: 11-13-2003 04:42 :: edinburgh :: Replies: 1 :: Views: 1273
Does anyone have any experience with RF emission measurement from PC's? I need measurement data to 10 GHz and would appreciate any input.
Thanks in advance
RF, Microwave, Antennas and Optics :: 11-24-2003 07:54 :: Debeli :: Replies: 0 :: Views: 924
I have two questions on measurement of phased arrays.
1)How to measure the change of element's active reflected coefficient along with the scanning angles without the phased shifter?
2)How to confirm the array's phase centre?
Please tell me the solved method or commend some papers and books about it.Especially e-book:)
RF, Microwave, Antennas and Optics :: 12-10-2003 07:48 :: caocao :: Replies: 0 :: Views: 883
In fact the coil is part of the PCB.
Here is the pcb layout
Hobby Circuits and Small Projects Problems :: 12-19-2003 14:44 :: SphinX :: Replies: 2 :: Views: 2735
Moulthrop, A.S.; Clark, C.J.; Muha, M.S.; Silva, C.P."Dynamic AM/AM and AM/PM measurement Technique"1997 MTT-S Intl. Microwave Symp. Digest, Vol. 3, 1455-1458 (Denver, CO, June 8-13, 1997).
thanx in advance
RF, Microwave, Antennas and Optics :: 12-21-2003 03:41 :: e971 :: Replies: 1 :: Views: 1233