DEK motor with U-coreless coil or Lenz boxing against Lentz

[woopy]

thank's for interest

@sushimoto

the lynch motor is fantastic     great torque and very good efficiency       before flying i used them for gokarting incredible torque.  But for flying it spin something too high ,My 1.3 meter prop spin at 2500 rpm and at this speed the blade tips are very noisy.
I think that for electric flight the prop has to be very silent so you can fly without disturbing the neighborhoud (for info the lynch motor get about 50 volts at about 280 amps and swings the prop at 2500 rpm which gives about 55 kg of push)

the aim of the DEK motor is to reduce the rpm to about 1200  with a 1.3 meter prop (of course i will have to enlarge the blades to absorb the power)

@Khabe

I enclose a better photo so you can see how the magnet are arranged with the polarity and timing

The motor UCC is the red one on the bottom of the set up      the green coil (one large on the top and one thin on the right) are put there to make a test to use  UCC as generator

When i short cut the green UCC the rotor speed drops a bit  around 100 rpm. the large one drops more than the thin one  (notice that both grenn UCC have the same turns number as the red motorUCC)

I will make better measurement as soon as possible.

@tishatang

very interesting link thank's i will study

@all

some drawings to make the DEK motor with UCC more clear i hope        and why Lenz is boxing against himself in a UCC if it does ??

to be clear  the small motor with the orange prop is not  the DEK motor it is a load to see if there is some power to get from the BEMF of the red motor UCC (when the rotor spin at 1100 rpm the small dc motor  spin at about 1680 rpm and the leds lit very brightly             btw DEK is the name of my dog it comes from a joke we made in the Perepiteia thread

Laurent

[sushimoto]

thank's for interest

@sushimoto

the lynch motor is fantastic     great torque and very good efficiency       before flying i used them for gokarting incredible torque.  But for flying it spin something too high ,My 1.3 meter prop spin at 2500 rpm and at this speed the blade tips are very noisy.
I think that for electric flight the prop has to be very silent so you can fly without disturbing the neighborhoud (for info the lynch motor get about 50 volts at about 280 amps and swings the prop at 2500 rpm which gives about 55 kg of push)

the aim of the DEK motor is to reduce the rpm to about 1200  with a 1.3 meter prop (of course i will have to enlarge the blades to absorb the power)

<SNIP>

some drawings to make the DEK motor with UCC more clear i hope        and why Lenz is boxing against himself in a UCC if it does ??

to be clear  the small motor with the orange prop is not  the DEK motor it is a load to see if there is some power to get from the BEMF of the red motor UCC (when the rotor spin at 1100 rpm the small dc motor  spin at about 1680 rpm and the leds lit very brightly             btw DEK is the name of my dog it comes from a joke we made in the Perepiteia thread

Laurent

Hi laurent,
thanks for answering and sorry for beeing a bit offtoppic.

I am very interested in UL (especially gyrocopters) and currently investigating on
"state of the art" motors. I think my path will be very much like yours.
Searching, whats best "off the shelf" and what can we do to enhance existing stuff.

Assuming that the Agni motor is best tested, why not using some gearbox or less volts in order to reduce rpm?
So i appreciate your experience and conclusion so far and will try to collaborate to your further experiments.

best regards,

[BEP]

@woopy

A suggestion:

While your new coil is still flat, twist it into a 'figure 8' shape before folding it into the 'figure U'.

Please consider the interesting polarities but test before deciding what those polarities are. You should see they are not what you may think.

I think this action may help your quest.

BEP

[khabe]

thank's for interest


@Khabe

I enclose a better photo so you can see how the magnet are arranged with the polarity and timing

The motor UCC is the red one on the bottom of the set up      the green coil (one large on the top and one thin on the right) are put there to make a test to use  UCC as generator

When i short cut the green UCC the rotor speed drops a bit  around 100 rpm. the large one drops more than the thin one  (notice that both grenn UCC have the same turns number as the red motorUCC)

I will make better measurement as soon as possible.


Laurent

Yes, correct,
Anyway two magnets per each coil is twice better ...<->SN<->NS<->SN<->NS...
cheers,
khabe

Hereby one phase version ofConfrontational magnets - flux expanded widely between magnets - through coil wires - (this "meeting point" is what works with wires ("coil") by left hand rule ("motor rule"))
so - the right position is when :  ...->NS<-/left side coil/->SN<-/right side coil/->NS<- ...
When 3-phases then windings B and C places between phase A,
Bit complicated to make those next windings but exercisable,

Regards,
khabe

[woopy]

@sushimoto

you are right in the track

but a gear box is heayy, make noise, is expensive, is subject to malfunction and loose efficiency .  furthermore the lynch motor is already heavy 11 kg original      and 7.5 kg as per the photos here above but after very expensive work and it is prototype

lowering the volts = lowering the power and we need quite a lot of watts to fly  and especially for a gyrocopter which gliding perfo is not very high.  But you could perhaps use a UCC to prerotate your gyrorotor

there is big outrunner motor type LRK which are light and very efficient Dr Werner Eck in germany makes something or Yuneec for paramotoring (simply Google these names) but all are spinning quite high. Another problem with these motor are the controllers very expensive at not always reliable.

so the idea here is to make a very large disk  ( about 40 to 50  centimeter diameter , perhaps a bicycle wheel) and very thin with magnets around and to pulse-push these magnets with  UCCs.   the UCCs will not be all around the disk but there will be about 5 to and 6 UCCs each powered separately with 50 amps (at 56 volts)and than you regulate the power by adding or supressing the alimentation on theUCC.  The more connected UCCs(in parallel) the more power on the disk    It will be something as a geared electrical variation.    I will post a drawing of the idea


@BEP

thank's for interest

i tried the 8 UCC and also a 8XUCC

the 8UCC attract strongly the magnet to it's center but as the magnet is twisted 90 degree in comparison with the UCC the magnet is also attracted sideway  against the coil.  Inside the UCC the pulse current pushes the magnet from one side to the other.  Feel free to test yourself it so easy to do and full of learning         in the 8xUCC this a"bordel" flux path

Laurent