help with IR2110 chips

[Maglatron]

as you can see there is a phase shift of 90 degrees on each coil

 

[Maglatron]

my simbox shows different that your Mr Harald Kapp

 

[Alec_t]

500 posts already !!

 

[Maglatron]

so I took off the old wheel (looking very naked now) removed the back two coils. no super glue to glue on the magnets!!! going to have to get some asap the gaps between the magnets on the 8-a-side wheel are much bigger than I remember just did some solder work on the spectrum analyser board today looks like there should be enough room for the extra coils in the end anyway!

 

[Maglatron]

and the wheel is actuall 28cm in diameter and the magnets center is 7cm from the center of the disk

 

[Maglatron]

As you will have seen from the waveforms in my posted sims, the sims model each coil being energised by a passing magnet more or less continuously, i.e near 100% "duty cycle". However, that would require no, or very litle, angular spacing between magnets.
In your machine, what is the magnet diameter (assuming magnets with circular faces), how many magnets per wheel face, and at what radius from the wheel centre are the magnet centres? Those figures would give a better idea of the real-world duty cycle, on which the average available power from the machine depends (among other things).
I suspect you may need a lot more coils to get the machine output required for driving that fan. It would be far more energy-efficient to power fan blades mechanically by whatever drives the wheel.

the rubber disk are 30cm in diameter the magnets are 2.5cm in diameter 3mm thick doubled up to make 6mm of magnet, the magnets are situated 7.5 cm from the axis there are 8 magnets either side or 16 if you double them up but effectively 8 magnets either side! going to put 10 on either side of the spare wheel and run it up and give it a go also I might add that the coil diameter of the new 7ohm sort are about 5cm and the cores are bolts with a diameter of 1cm but they have a nut on making them about 16mm, I think when a north is passing a coil - when it passes the bolt a south should be approaching (for the 10 magnet arrangement) at the moment with the 8 magnet arrangement the space between the magnets is roughly 2.5cm (I could fit a magnet between the mounted magnets snuggly)
but I am putting on 10 magnets not 16 so there will still be a gap between them! and I think that if the magnets have a 5cm gap centre to centre, it would be nice! it runs at 600 rpm nicely plus the two extra magnets at 600 rpm would make 50Hz!

did you get to use the information in the end?

 

[Alec_t]

and the wheel is actuall 28cm in diameter and the magnets center is 7cm from the center of the disk

If the magnets were at a greater radius their tangential velocity would be greater and so would the coil voltage, albeit the coil pulse would be narrower.

did you get to use the information in the end?

It gives a better estimate of the duty cycle. Looking more like 60% with 10 magnets, compared to 50% with 8.

 

[Maglatron]

I'll take photos when I get a chance I purposly put the magnets closer to the middle than the edge and thats because they have less magnetic cogging effect and so the wheel spins faster with more ease and less labour on the motor driving the wheel. do you think that you can put alternating magnets too close together? because I do, I think that they need at least a small gap between magnets for it to work most efficiently!

 

[Maglatron]

the gap should be at least as big as the core that the magnets pass

 

[Maglatron]

do you think 12 or even 14 magnets or even 16 magnets a side would be better, in your opinion I have enough for 12-a-side right now as we speak

 

[Maglatron]

It gives a better estimate of the duty cycle. Looking more like 60% with 10 magnets, compared to 50% with 8.

using this sense, would 16 magnets be 100%

 

[Maglatron]

I took the plunge and got enough for 16-a-side!

 

[Maglatron]

I cannot see the digits on this picture too low resolution!! thanks

Your 5 voltage sources are all the same: SINE(0 14 50 0 0 0). There is no phase difference.
Your diodes lack the model. You need to assign a valid model to the diodes (right click). See my example below

This is my result with 3 sources and 120 degrees phase shift:
View attachment 62707

 

[Maglatron]

I have an older picture might help visualize the 8-a-side wheel

 

[Maglatron]

getting glue tomorrow hopefully get to fit the magnets to the spare wheel! have to decide if I'm goin with 14-a-side or 16-a-side! any ideas??

 

[Alec_t]

using this sense, would 16 magnets be 100%

By my calculations, using the dimensions you provided, the maximum number of magnets you could fit round a 7cm radius circle would be 18, for 100%. So 16 comes close. I guess the need to separate alternating poles or not would depend on the field characteristics of the magnets.

 

[Maglatron]

ok thanks I'll fit the 16 how did you calcultate it? also did you see the picture witht the wheel with 8 on I don't think that 18 would fit to be honest

 

[Alec_t]

how did you calcultate it?

2 x pi x 7 / 2.5. I thought you were using a different wheel from the one in the pic.

 

[Maglatron]

the wheel I'm using is identical to the one in the pic just without any magnets stuck to it yet! was just to show you the spacing of the 8 magnet wheel! for your viewing pleasure I will be sticking 16 magnets either side doubled up that's 64 magnets in total!

 

[Maglatron]

I still think that there needs to be a gap at least the size of the cores = 15mm, between magnets