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Overunity Machines Forum



170 watts in - 1600 watts out - looped - Very impressive build and video

Started by e2matrix, February 17, 2018, 01:03:05 PM

Previous topic - Next topic

0 Members and 2 Guests are viewing this topic.

gotoluc

The below video is the method I use when cutting a stack of transformer laminations.
A thin cut off blade is a must!, wear a quality filtered mask as silica is present in transformer laminations and I also protect my ears.
You must use strong clamp pressure with a steel plate on each sides to distribute the pressure. Without it, you are sure to ruin the laminations as the metal particles will fill between laminations and inflate the core.

Luc

français
La vidéo ci-dessous est la méthode que j'utilise pour couper une pile de tôles de transformateur.
Une lame de coupe fine est un must !, portez un masque filtré de qualité car la silice est présente dans les tôles des transformateurs. La protection des yeux est également un must et je protège également mes oreilles.
Vous devez utiliser une forte pression de serrage avec une plaque d'acier de chaque côté pour répartir la pression. Sans cela, vous êtes sûr de ruiner les tôles pendant que les particules métalliques se remplissent entre les tôles et gonflent le noyau.

Video: https://youtu.be/F3q8QyUwawI

gotoluc


gotoluc

The below link is a LibreOffice spreadsheet of each coils resistance (A), Inductance (B) without center core, then Inductance (C) with center core in fixed horizontal position as below picture.

http://s000.tinyupload.com/?file_id=98828892163314457292

Luc

français
Veuillez trouver le lien pour document LibreOffice des données de chaque résistance de bobines (A), Inductance (B) sans noyau central, puis Inductance (C) avec le noyau central en position horizontale fixe comme photo ci-dessous.

pmgr

Quote from: gotoluc on March 21, 2018, 05:55:04 PM
The below link is a LibreOffice spreadsheet of each coils resistance (A), Inductance (B) without center core, then Inductance (C) with center core in fixed horizontal position as below picture.

http://s000.tinyupload.com/?file_id=98828892163314457292

Luc

français
Veuillez trouver le lien pour document LibreOffice des données de chaque résistance de bobines (A), Inductance (B) sans noyau central, puis Inductance (C) avec le noyau central en position horizontale fixe comme photo ci-dessous.
Hi Luc, thanks for posting the numbers. I have plotted them for you, please see the attached plot. This is kind of what is expected, about same inductance for each coil without rotor and enhanced inductance with 2-fold symmetry when the rotor is present. I will post some theoretical plots later for Pierre's 36 slot stator. The only thing I noticed is the dip around slot 15 and 21 for the measurement with rotor!

Regarding your individual coils, max/min/mean = 618/504/560.5uH and standard deviation is 33.6uH or about 6%, pretty good for handcrafted artwork!

Btw. I am assuming that none of the coils were connected together when you did these measurements, correct? All should be open circuit except for the one that you are measuring.


PmgR

gotoluc

Quote from: pmgr on March 21, 2018, 07:32:11 PM
Hi Luc, thanks for posting the numbers. I have plotted them for you, please see the attached plot. This is kind of what is expected, about same inductance for each coil without rotor and enhanced inductance with 2-fold symmetry when the rotor is prescomplot ent. I will post some theoretical plots later for Pierre's 36 slot stator. The only thing I noticed is the dip around slot 15 and 21 for the measurement with rotor!

Regarding your individual coils, max/min/mean = 618/504/560.5uH and standard deviation is 33.6uH or about 6%, pretty good for handcrafted artwork!

Btw. I am assuming that none of the coils were connected together when you did these measurements, correct? All should be open circuit except for the one that you are measuring.

PmgR

français
Salut Luc, merci de poster les chiffres. Je les ai tracés pour vous, s'il vous plaît voir ci-dessous. C'est en quelque sorte ce à quoi je m'attendais, à peu près la même inductance pour chaque bobine sans rotor et une inductance améliorée avec une symétrie double lorsque le noyau du rotor est présent. Je posterai quelques autre tracés théoriques plus tard pour le stator de 36 slots de Pierre. La seule chose que j'ai remarqué est le creux autour des slot 15 et 21 pour la mesure avec le rotor!
En ce qui concerne vos bobines individuelles, max / min / mean = 618/504 / 560.5uH et l'écart type est de 33.6uH ou environ 6%, assez bon pour les illustrations faites à la main!
Je suppose qu'aucune bobine n'a été connectée lorsque vous avez fait ces mesures, n'est-ce pas? Tout devrait être en circuit ouvert à l'exception de celui que vous mesurez.

Thanks for the Plot PmgR

Yes, all the coils were open (not connected) when taking the measurements.

Regards

Luc

français
Merci pour le tracés  PmgR
Oui, toutes les bobines étaient ouvertes (non connectées) lors de la prise des mesures.
Cordialement