Magnet Motor Toroidal Coil

[Poit]

Hi Everyone,           http://www.youtube.com/watch?v=zxcEaUd0ZaA
This is my first thread. I came across this video on youtube that effectively has made a permanent magnet motor with similar principals of a traditional electric motor. Attracts, repels, attracts, repels etc etc..... I am very keen in duplicating the magnetic field blocking coil. Looks like a simple enough circuit (I am not all that smart with electronics, but know enough (I guess) to replicate this).. Even has circuit diagrams and pretty pictures

[exnihiloest]

Hi Everyone,           http://www.youtube.com/watch?v=zxcEaUd0ZaA
This is my first thread. I came across this video on youtube that effectively has made a permanent magnet motor with similar principals of a traditional electric motor. Attracts, repels, attracts, repels etc etc..... I am very keen in duplicating the magnetic field blocking coil. Looks like a simple enough circuit (I am not all that smart with electronics, but know enough (I guess) to replicate this).. Even has circuit diagrams and pretty pictures

Interesting matter. There is something intriguing at time 3'00. A rotor magnet is attracted towards the toroidal coil. This is due either to the stationary magnet attracting it from the other side of the coil or to the ferromagnetic core of the coil.
But when the coil is powered, the rotor magnet is repelled. It is not clear why because the field from the coil is perpendicular to the magnet's field so it should play no role and even if it would play a role, there is no reason the rotor rotates clockwise or counterclockwise.

[gyulasun]

Interesting matter. There is something intriguing at time 3'00. A rotor magnet is attracted towards the toroidal coil. This is due either to the stationary magnet attracting it from the other side of the coil or to the ferromagnetic core of the coil.
But when the coil is powered, the rotor magnet is repelled. It is not clear why because the field from the coil is perpendicular to the magnet's field so it should play no role and even if it would play a role, there is no reason the rotor rotates clockwise or counterclockwise.

When you place a magnet (either permanent or electromagnet) to the side of the ring core and the coil on the ring is excited, the flux can leak out at the place where the side magnet is positioned, the homogen inside toroidal field in the ring is disturbed from outside and the flux leaves the ring I think.

[synchro1]

It looks like he just wound magnet wire over a common iron washer, untill he filled the hole up.

[gravityblock]

Interesting matter. There is something intriguing at time 3'00. A rotor magnet is attracted towards the toroidal coil. This is due either to the stationary magnet attracting it from the other side of the coil or to the ferromagnetic core of the coil.
But when the coil is powered, the rotor magnet is repelled. It is not clear why because the field from the coil is perpendicular to the magnet's field so it should play no role and even if it would play a role, there is no reason the rotor rotates clockwise or counterclockwise.

When you place a magnet (either permanent or electromagnet) to the side of the ring core and the coil on the ring is excited, the flux can leak out at the place where the side magnet is positioned, the homogen inside toroidal field in the ring is disturbed from outside and the flux leaves the ring I think.

Here's a third possibility.  The rotor and stator magnet (the stator magnet being on the other side of the coil) are in repulsion mode and this can be seen in the video at 2:52 written out in a caption.  The rotor magnet is attracted to the core, since the attraction to the core is greater than the repulsion from the stator magnet.  When the coil is energized at TDC, then the core loses it's net attractiveness and the rotor magnet is repelled by the stator magnet.

Around 3:02 of the video, you can see the rotor oscillating back and forth when the coil stays energized due to the rotor magnets on each side of TDC repelling against the stator magnet in opposite directions.  When he de-energizes the coil, then the approaching magnet is attracted to the core again.

GB