help with IR2110 chips

[Maglatron]

heck I'm just going to stick them!

didn't get chance to stick on the rest of the pennies last night, will be doing it today! may need an extra day to dry afterwards!

 

[Alec_t]

Do you have any evidence that adding a 2mm thick ferromagnetic coin to the magnet face will be an advantage over simply moving the coil 2mm closer to the magnet ?

 

[Maglatron]

No evidence, just makes sence to me, also when mounting the coils, it's very difficult to move it over a couple of mm to the magnets without it snapping or jumping towards the magnet before the hot glue dries we will see! At the moment, the coils are as close as I could get them and stuck solid and I honestly think that it will help alot to add the coins!

 

[Maglatron]

like I said, we will see! this is my theory!

 

[Maglatron]

I think the evidence is when you pick up a paper clip with a magnet you can pick up a large chain of paper clips much further than if you try to pick up the furthest one away without the chain, if you get what I'm saying, going back to when I was a kid when I used to play around with magnets! I hope you do get my drift, thanks

 

[Alec_t]

I think the evidence is when you pick up a paper clip with a magnet you can pick up a large chain of paper clips much further than if you try to pick up the furthest one away without the chain

With the chain you are reducing the magnetic reluctance between the magnet and the target paper clip, i.e. effectively extending the magnet and reducing the magnet-target gap. That's surely the same as moving the target clip closer to the magnet to reduce the gap?

 

[Maglatron]

so the penny will be extending the magnet power towards the coil as the air gap decreases, because of the penny, you have essentially just described the effect that I'm after! moving the coil towards the magnet or extending the magnet to the coil, both will have the same effect you are correct but it becomes bothersome when mounting the coils because of practicalities the magnets are so strong at a certain point the coil core "jumps" toward the magnet and sticks to it before the glue can dry but mounting the pennys onto the magnet along with the guide's of the trolley wheels I can mount the wheel and the gap will be substantially less and the pennys are stuck so I don't have to hold anything in place for drying times and I think it's goint to run sweet as a nut!

With the chain you are reducing the magnetic reluctance between the magnet and the target paper clip, i.e. effectively extending the magnet and reducing the magnet-target gap. That's surely the same as moving the target clip closer to the magnet to reduce the gap?

it's not a question of weather the air gap is reduced by the pennys, or if it's better to move the coils towards the magnets to reduce the air gap, it's about the the limitations and practicalities of moving the coil closer to the magnet, phisically, it's very difficult, so you could say I'm just making life easier doing it this way! thanks

and I am definatly NOT saying that moving the coil to the magnet wouln't be better; it would! but like I said when the core of the coils gets closer to the magnet it just snaps over to the magnet very quickly and the magnet pull with 6kg of pulling power I hope I'm explaining it properly, thanks

 

[Maglatron]

blue is magnet, yellow is core of coil, red is pennies, grey is coil this is a top view and this image tries to explain that when moving the coil over to the magnet at some point the magnet is soo strong that you cannot hold it from spapping over to the magnet!! thanks, and thus the air gap is reduced!!! thanks

 

[Maglatron]

I just want to add that if I could move the coils closer, I would!! thanks

 

[Alec_t]

Ah, the joys of having a ferromagnetic core for the coil. Probably one reason why other designs use air-cored coils .

 

[bertus]

Hello,

This example uses air coils:

https://ietresearch.onlinelibrary.wiley.com/doi/full/10.1049/iet-rpg.2018.5311

Bertus

 

[Maglatron]

should be going to work on it soon I'll try get a couple of photo shots

 

[Maglatron]

that is a very nice one!! yes a very nice read! thanks

Hello,

This example uses air coils:

https://ietresearch.onlinelibrary.wiley.com/doi/full/10.1049/iet-rpg.2018.5311

Bertus

 

[Maglatron]

the information matches up with what Mr Alec_t was saying about the coil : magnet ratio. On thier machine the optimum was 3 : 4 !!

 

[Maglatron]

stuck the rest of the pennies waiting for glue to dry will probably mount the wheel again tomorrow but could be tonight see what happens and how to night plays out, wish me luck! thanks

 

[Alec_t]

Good luck!

 

[Maglatron]

so it worked on one side but still snapped over on the other side so need to remount the coil again with the same gap as before not the best result but it's renderable! not good!

 

[Alec_t]

I don't know how your coil is mounted now, but if you used a longer bolt or threaded rod as the core, instead of the present bolt, wouldn't that allow simple screw adjustment of coil-to-magnet spacing?

 

[Maglatron]

funny you should suggest that because I did think of that myself but the coils would need to be rewound not too much of a problem just time !! thanks

 

[Maglatron]

so might not get on the machine today, we'll see later! thanks