Controller circuit for Hilden Brandt motor needed..

[JackH]

Hello Steven,

I am a bit confused,  What causses your motor to drop rpm when the magnets are added?    My motors always give up almost half the RPM when I take the magnets out.

Later,,,,,,JackH

[Nali2001]

Hi Jack,
I believe there is an balance in a motor as this which will allow for good switching of the magnet. And the most important factor is the airgap. A super tiny airgap will put up less resistance against the magnet, and so will allow good switching. Now keep in mind that a small airgap on a small motor might still be too big. I mean if you make a hand size motor with a 0.1mm airgap you think that is small. But if you make a car sized motor with also a 0.1mm airgap it is in a much better situation for good switching. Since the size of the poles versus airgap size is also a important factor. The other thing is, input power. Right now I am limited to 48v max. which is not high enough for my liking. Plus there is also the 'issue' of magnets. I have found that the magnets only switch good when you have the situation where the valve almost becomes leaky when the magnets are added. That means that the valve still attracts a tiny bit when turned off. But when you are in a situation where the magnets don't switch at the supplied power level, you will see a mini drop in rpm since the magnets re interfering with the coil. But there is a lot to it. personally I believe these motors shine when build big and for low rpm.

Regards,
Steven

[JackH]

Hello Steven,

Well I half to agree with you a little bit.   But  I think you have the magnets too fare from the rotor.  I have found that the best way to build this motor is to have the magnets in between the rotor and the coil.  That way the magnets is very close to the rotor.

Your magnets are very close to the coil and fare away from the rotor.  I have also  found out that if you keep the magnets inline with the rotor and the coil, you get more power out and more rpm.  I think that the way you are doing, the magnet on the side of the core is causing the rpm to drop when you put the magnets on the side of the core.  I am a dummie, and maybe I do not know.

I built one of these motors like you built, it makes it easy to build, but the magnets are to fare from the rotor.   The magnets need to be inline with the rotor and the coil for best power and rpm.   I try to get my motors to build best power at around 1600 rpm,  at free whele thay run at around 2000 rpm.

Later,,,,,Jack

[wattsup]

@JackH

Thanks for them words. People should pay attention.
Had an idea and made the following to see if I understand.
Hope you are feeling well.

[JackH]

Hello wattsup,

Did the motor run faster and have more power with the magnets in the center.  or off the side.

Thank you, I am felling very well now,  I think I can bet this ALS or what ever I got.

Later,,,,,JackH