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

[gotoluc]

@PmgR, maybe this video will clear up the misunderstanding:  https://youtu.be/6vxqT2HyX5E

[pmgr]

@PmgR, maybe this video will clear up the misunderstanding:  https://youtu.be/6vxqT2HyX5E

Hi Luc, clear video. I understand what your are doing now with the winding. You are putting two coils in the same slot so you need 6*(6-1)=30 slots.

For Pierre's case, I think we need to get clarification from him how exactly he has wound the stator. What I assumed in my latest simulations is that a coil runs over 7 slots and the next coil is in the neighboring slot (see my number sequence above).

01-07 08-14 15-21 22-28 29-35 36-06
07-13 14-20 21-27 28-34 35-05 06-12
13-19 20-26 27-33 34-04 05-11 12-18
19-25 26-32 33-03 04-10 11-17 18-24
25-31 32-02 03-09 10-16 17-23 24-30
31-01 02-08 09-05 16-22 23-29 30-36

Yet he could also have done it like you did in your video: spanning 7 slots and have the neighboring coils in the same slot, then he would get the following sequence:
01-07 07-13 13-19 19-25 25-31 31-01
02-08 08-14 14-20 20-26 26-32 32-02
03-09 09-15 15-21 21-27 27-33 33-03
04-10 10-16 16-22 22-28 28-34 34-04
05-11 11-17 17-23 23-29 29-35 35-05
06-12 12-18 18-24 24-30 30-36 36-06

So we need to ask him which one he did and what coils are connected to each other as there are many options to interconnect these coils in a (closed loop) series manner.

PmgR

[gotoluc]

Hi Luc, clear video. I understand what your are doing now with the winding. You are putting two coils in the same slot so you need 6*(6-1)=30 slots.

For Pierre's case, I think we need to get clarification from him how exactly he has wound the stator. What I assumed in my latest simulations is that a coil runs over 7 slots and the next coil is in the neighboring slot (see my number sequence above).

01-07 08-14 15-21 22-28 29-35 36-06
07-13 14-20 21-27 28-34 35-05 06-12
13-19 20-26 27-33 34-04 05-11 12-18
19-25 26-32 33-03 04-10 11-17 18-24
25-31 32-02 03-09 10-16 17-23 24-30
31-01 02-08 09-05 16-22 23-29 30-36

Yet he could also have done it like you did in your video: spanning 7 slots and have the neighboring coils in the same slot, then he would get the following sequence:
01-07 07-13 13-19 19-25 25-31 31-01
02-08 08-14 14-20 20-26 26-32 32-02
03-09 09-15 15-21 21-27 27-33 33-03
04-10 10-16 16-22 22-28 28-34 34-04
05-11 11-17 17-23 23-29 29-35 35-05
06-12 12-18 18-24 24-30 30-36 36-06

So we need to ask him which one he did and what coils are connected to each other as there are many options to interconnect these coils in a (closed loop) series manner.

PmgR

Glad that cleared it up.
I'm quite sure Pierre wired his double coils per slot and why he has 72 relays and 72 diodes since you can't recover flyback from a single coil when AC is used, right?... the only way one could do it is to use an active diode switch which would flip the diode direction before the next pulse. We know Pierre did not do that, so I think it's safe to say I've got it right.
One way or the other before I start winding I'll make a French video for him and explain how I plan to wind just to make sure we are on the same page.

Thanks for your time and help

Regards

Luc

[mikegarla]

I tested some Solid state relays:

Mager MGR-1 DD220D40  (5-220 VDC in:3-32 VDC)
On time Delay 1.28  ms
Off time Delay 1.28 ms


Fotek SSR-80 DD  (5-60 VDC in 3-32 VDC)
On time delay 0.56 ms
Off time Delay 1.84 ms

I used a scope to get the times, your mileage will vary with input voltage higher to faster, and you could use a pull-down 10k for off time.

You maybe can source faster ones but cost will be higher..

edit; Writing the code is Not hard at all for the Mega 2650 sorry typo! its a SainSmart MEGA-2560
I'll try to upload some code for switching SSR's

Plus you would need back to back SSR's to stop destroying the Mosfets plus a fuse connecting the pairs just for safety, like a 30 amp for a 40 amp SSR.
That's maybe why he used the Relays...

Mike

[konehead]

Hi all
I am not "promoting" SSR switching, just saying it can be done but too expensive for one thing  (and lots of other ways to switch) and also I hope someone replicates exactly what Pierre does and gets the looping and OU.....

Also I have serious problems with the magic numbers that Pierre gave out, I think he was mistaken, or else the pattern continures "staggered" on position, or else it is supposed to "stop" at 36 pole and not continue....please look at at this revised drawing I did to make it clear what I was also talking about a few days ago - it gets out of sequence at end of string of phases if you do the 1-6 2-7 etc thing take a look here: