I can see that helioc installed shielding around the stator magnets, but the rotor magnets do not have shielding. Shielding plays a very important part in the Perendev PMM, and all of the magnets must be effectively shielded. In the photo (shown below) of the Perendev rotor stack, you can clearly see that the rotor magnets are shielded. If you look closely at the rotor being dropped onto the shaft, you will see crescent shaped undercuts to the left of each magnet, and these cuts have been made to receive additional shielding. The purpose of the crescent shielding is to lessen the repulsive effect of rotor magnets as they approach a stator magnet. In the working video of the Perendev PMM, the crescent shielding had not yet been installed. Even though the device ran quite well, it would probably do even better with the crescents in place.


The rotor magnet offset as used by helioc would appear to be insufficient, and this is another reason why his build is not working. The correct offset, from one rotor to the next, is 1/2 the magnet width, and so the total offset between the 1st and 3rd rotors is a full magnet width. In the photo below, a flat board experiment clearly shows the proper relationship of the rotor and stator magnets to achieve forward propulsion. It should be noted that the upper board is the "rotor" and the lower board is the "stator" in this example. The boards have graph paper glued to their faces, and you can clearly see the magnet installation layout. Ideally, the magnet width equals two graph cell widths, and the spacing between each magnet equals one cell width. This is true for both the rotor and stator. With a curved rotor and stator, if you are looking at the stator from above then its bore spacings will obviously appear wider apart than those of the rotor, but the radial spacings should be the same angle apart for both rotor and stator. It is hard to determine if that is the case in helioc's build, but it is an important factor. I have drawn colored lines across the board to represent alignment of the stator magnets to the rotor magnets. The stator magnets are represented by the yellow circles. The area between the blue lines, and the area between the green lines, depict the current alignment of stator magnets. You can see that the stator magnets are directly aligned with the bottom rotor magnet. The area between the pink lines shows how the relationship changes when the stator magnet alignment is directly in line with the middle rotor magnet. The area between the pink and green line shows the stator in direct alignment with the top rotor magnet. In any one of these three positions, you can see that we have two rotor magnets that are either half on or half off alignment with the stator magnets, and that these are in equilibrium. If that's all we had, then there would be no motion, but the third magnet is in direct repulsion. Due to the angle that the magnets are placed, this direct repulsion results in a forward motion of the board (to the right), and this is true at any one of the 3 possible alignment positions.


To see the "rotor" board in motion, view this video clip:
wayne2 mag board test.avi - Windows Live

Sorry, helioc, I do not know the Portuguese language, but if you have trouble understanding my explanations, you may be able to translate what I have said by using either the Google or Babelfish language translators. I hope this helps you to get your PMM going. It looks like you have spent considerable time putting it together, and much of what you have done is correct. As jetijs mentions, be sure to use non-magnetic stainless steel for any bolts or other metal parts, and also for your through shaft.

Best regards,

Rick