2008.8.5掲載
DUALSKY製のモーターについて机上で計算可能なソフトを入手しました。
モーターの効率を計算する内容ですが、使用ペラにおける最大電流等もわかりますので便利そうです。
試しに使ってみたところ、電流値については２０％程度低めに計算されました。調整箇所が多いので、うまく再現されるようにできるかも知れません。使用方法などについては少し使ってみてからレポートする予定です。
使用して見たい方は、以下のファイルをダウンロードして解凍してください。（zip形式）
Install :
After downloading the zip file ..
Just unzip in any folder.
Uninstall :
There are no key in the Windows register.
Just kill manually Dualsky_Calc_v302.exe
You are free to keep or not the .txt or .mmc ASCII documents
Contents :
VB6 executable Dualsky_Calc_v302.exe
One initializing file Dualsky.ini
One default file using the .mmc extension
One DC_readmefirst.txt (this document)
Running :
Simply run the .exe
Save/open feature
For open/save functions you need Microsoft files for Common Dialog box
Generally the following files are already on the PC
Comdlg32.ocx and Comdlg32.dll (usually in C:\\Windows\System32\ )
If not, you have to download (free) from the web.
Save first a project on anyfile.mmc in the working folder.
Then you can open it.
You can save/open a file for different custom motors (Rm, Io, Kv ..).
But the selected prop reference is not saved.
Compatibility :
There is no warranty that the .mmc files will be compatible with future versions of the freeware
Algorithms
The author is permanently optimizing the empirical formulas and the coefficients to try
to get results as close as possible of the real world.
Anyway the performances are uncertain, particularly concerning the temperature rising.
The algorithm tries to compute the temperature at the copper wire level.
The air flow at using could get down this figure.
Same advertisement concerning the propeller simulation.
The pitch and the power-thrust coefficients are uncertain.
So the results concerning the absorbed current, thrust and pitch speed are approximative.
If you have yourself some test-results, you can use "generic mode" and change the Abbott and Thrust coefficients,
in order to get a good fit.
The author accepts to receive propeller samples to test and add on the freeware.
About the author
This freeware was written by Louis Fourdan, who was born in 1939.
Louis is living in Antony, south suburbs of Paris, France. Married, 3 children, 7 grand children.
He graduated with a degree in electrical engineering from Supelec(France) in 1961.
He was an international radar expert (Thomson CSF) with a large technical spectrum,
from antenna arrays to digital signal processing (DSP) and radar projects.
Louis retired in 1996 and wrote a lot of software for hobbyists using VB6 platform.
He is knowledgeable about brushless motors for the RC world and particularly keen about solar-powered RC cars.
Louis is the founder-moderator of "Solar-RC-Cars" Yahoo group.
French friends call him "Solar Grampa".
Another one of his hobbies includes Carambole billiards.