Magnetic drive for bioreactor

A system to be utilized as bioreactor mixer, the system comprising:

• a rotating drive;
• a fixed shaft;
• an impeller capable of rotating around the fixed shaft;
• a plurality of magnets positioned in one or more array formats, a first set of magnets in a first array format positioned at a drive end adjacent the rotating drive and a second set of magnets in a second array format positioned at the impeller;
• and
• at least one plate including the first set of magnets positioned thereon such that the first set of magnets are positioned in a concentric geometric configuration and individually shaped with a wider outside dimension that narrows toward a center of the concentric geometric configuration;
• wherein the second set of magnets are arranged adjacent one another to augment a magnetic field on one side of the second array while cancelling the magnetic field to zero on an opposite side of the second array to achieve a spatially rotating pattern of magnetization.