Turn Calculator 7.2 - RC Groups
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Aug 17, 2014, 11:45 PM
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Turn Calculator 7.2


This is the new version of TC Ver7.
I hope it's more simple to interpret.
the post 2 and 3 explain its operation and the criteria used.

Includes the calculation of the surface of a slot in the stator, and the maximum number of turns that can be achieved as well as the resistance of the wire.
(no the value Rm)

First of all, we should clarify that the TC7 Excel is not a software to calculate the Kv of a motor knowing their design characteristics. (Magnets, stator, materials, airgap, tolerances, etc)

Rather, it is only one replicator,
Knowing the Kv and number of turns of a motor, excel tells us the result of the other possible combinations.

So for your application you need to know at least 3 things.

Number of turns of the electric motor.
The actual Kv measured by number of unloaded motor RPM / Volts.
Termination. Delta/Star.

Ver 7.1, post no.21

Old Ver.
TC3,4,5,6,simpleTC https://www.rcgroups.com/forums/show...&postcount=266

The latest version includes 3 worksheets.
The first the Turn calculator 7.2
the second a sheet to fill in motor data and motor
test results.
The third is a turn calculator to be used to wire motors for gimbal.
block 5 only includes very thin wires. and one only feeds the desired number of turns, instead of a long list of each number of turns.
Last edited by manuel v; Sep 07, 2017 at 11:27 PM.
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Aug 17, 2014, 11:46 PM
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If you have a motor, you have to know the Kv. preferably measured vs the manufacturer's specification)
Measuring Kv.
Probando un Motor. No load. (0 min 43 sec)
,
http://aeromodelismoelectrico.blogsp...electrico.html

If you rewind, care must be taken to disassemble count the number of turns you have.
Trying to find the wire gauge.
and the distance of one of the wires.

These data are fed into the yellow boxes F1 to F6.

F6. be the value in milliohms gauge wire that is intended to be used and the value will be taken from the tab, the in block 5 and comprises of A65-I78.

This data is not necessary, is only an information to calculate the value in milliohms each of the wires.

In Block 1, (B10-E51) appear the results of the variants.

Kv different number of turns in either Delta to column B in column C. star to

If the data wire is feed, this appear in column D, includes 3 inches extra for each wire tip and column E value in milliohms wire that appears, if the data in F6 feed.

The Block 1 Data are for the same type of scheme the original motor.
If the motor is ABCx3, all results will be for this same scheme and the same number of magnets.

Like if the motor is 12 teeth or 24 or if the scheme is DLRK or LRK. or any other scheme.

The Block 2 (G10-J51) as Block 3 (L10-O51) It shows the result, if we want to try a different to the original scheme. and is shown for schemes with two parallel groups in block 2 and LRK schemes in block 3.
It also gives us the data of the distance of each wire and its resistance.
Last edited by manuel v; Sep 26, 2015 at 03:51 PM.
Aug 17, 2014, 11:46 PM
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Block 4 (A56-E62)
A stator has the eslots as trapezoids.
so you can take the measure of 2 sides and 2 heights, feed on the C56-C59 yellow boxes and we give you a result of mm2 surface in D62.

Block 5 (A68-I78)
We have in column A, the wire gauge.
In column B, the resistance in milliohms per foot.
In column C, the wire diameter in mm. Includes insulating varnish.
In column D, The surface of the wire in mm2.
These data are fixed according to the surface, we Excelcalculated the maxims number turns that you can put a tooth, shown in column E.
The slot, double wires carry the data shown in E.

The F column shows half the surface of a slot, covered wire.
Would be very difficult to cover 100%.
Possibly someone with a super ability to rewind can achieve more marked than here.

Column G in yellow, you can feed, according to wire gauge is used, the number of turns achieved or put on stator and give us the surface in mm2 achieved (packaged) in column H.

Column I gives the result of resistance if we used 2 wire.
I've seen some rewound with 2 wires, I prefer to use just one.
Still I happened to add the data.

Blog as a motor rewind.
http://aeromodelismoelectrico.blogsp...o%20un%20motor

Blog about how to test an motor.
http://aeromodelismoelectrico.blogsp...electrico.html

Blog on how to fix an motor.
https://www.rcgroups.com/forums/show....php?t=1079423

Blog on how rewind an motor.
http://aeromodelismoelectrico.blogsp...o%20un%20motor
Last edited by manuel v; Aug 15, 2015 at 09:57 PM.
Sep 04, 2014, 11:54 PM
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Im sorry.

Turn calculator 7, have a one error.
Block3.
L10 say LRK star. correct is LRK Delta.

M10 say LRK Delta. Correct is LRK Star.

Manuel v.
Sep 05, 2014, 10:29 AM
Jack
jackerbes's Avatar
Sounds like your secretary made a mistake!

And are you going to correct that in the download above?

Jack
Sep 05, 2014, 01:09 PM
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manuel v's Avatar
Just yesterday I noticed.
Zip file is already in the first post.

Manuel V.
Sep 05, 2014, 10:01 PM
Jack
jackerbes's Avatar
If you upload it again with the new file it will be corrected.

Some of us are so stupid about spreadsheets we can't even correct a cell label...

Jack
Sep 05, 2014, 10:36 PM
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manuel v's Avatar
Yes Jack.

Now only one file.

Manuel V.
Sep 06, 2014, 08:58 AM
Jack
jackerbes's Avatar
Quote:
Originally Posted by manuel v
Yes Jack.

Now only one file.

Manuel V.
Thank you!

Now I just have to study this stuff and see if I can figure it out!

Jack
Sep 21, 2014, 07:39 PM
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Bladecpnitro's Avatar
Thanks Manuel for offering this nice turn calculator.

How do you handle a motor with 2 and 3 turns like the Scorpion 4020-1350KV?
Sep 21, 2014, 08:05 PM
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manuel v's Avatar
Scorpion account turns per slot.
one 2T / 3T, 2.5turns equals to 5 turns per slot.
If the case of serious DLRK:
an asymmetrical wind. 232323232323 turns per tooth.

You can feed 2.5 turns per tooth on TC7. and the result will be for a tooth.
Also you can do for that slot would be 5 and the score per slot.


For the same Kv I like HP DLRK five turns.

Manuel V.
Sep 22, 2014, 07:56 AM
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Quote:
Originally Posted by manuel v
Scorpion account turns per slot.
one 2T / 3T, 2.5turns equals to 5 turns per slot.
If the case of serious DLRK:
an asymmetrical wind. 232323232323 turns per tooth.

You can feed 2.5 turns per tooth on TC7. and the result will be for a tooth.
Also you can do for that slot would be 5 and the score per slot.


For the same Kv I like HP DLRK five turns.

Manuel V.
What's that Half Parallel DLRK? I'm kind of interested in that wind. With more turns I wouldn't need to use such large wire.
Sep 22, 2014, 12:37 PM
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manuel v's Avatar
Half parallel wind. Both
for DLRK 10 and 14 magnetpoles
Last edited by manuel v; Jul 18, 2016 at 10:57 PM.
Jan 30, 2015, 10:46 PM
Cubs
I don't understand the turn calc. If I knew the wire length value, I wouldn't need the turn calc.
Also, I've been catching up on my studies. It is in fact true that if the turn doesn't cross the prior, it is only resistance and contributes nothing to magnetism thus reducing efficiency.
Jan 30, 2015, 11:56 PM
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manuel v's Avatar
Please, read first post.
Last edited by manuel v; Jan 31, 2015 at 12:51 AM.


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