Dipole permanent magnet structure

A dipole permanent magnet structure having a rectangular gap about a longitudinal axis, said structure comprising:

• a first pole piece and a second pole piece forming opposing sides of said rectangular gap to permit a magnetic field having a flux density in said rectangular gap;
• a first permanent magnet coupled to said first pole piece, having a magnetic field oriented toward said first pole piece;
• a second permanent magnet coupled to said second pole piece, having a magnetic field oriented away from said second pole piece;
• said first permanent magnet and said second permanent magnet forming said magnetic field in said rectangular gap;
• a plurality of permanent magnets coupling said first permanent magnet and said second permanent magnet to form a magnetic circuit through said rectangular gap;
• and
• said plurality of permanent magnets each having a magnetic field oriented to intensify said magnetic field in said rectangular gap, said magnetic field in said first permanent magnet, said second permanent magnet and each of said plurality of permanent magnets having a residual flux density, wherein said flux density in said rectangular gap is greater than said residual flux density.

A dipole permanent magnet structure having a rectangular gap about a longitudinal axis, comprising:

• a first pole piece and a second pole piece, each having a tip and a base, each said tip forming an opposing side of said rectangular gap to permit establishing a magnetic field between said each said tip;
• a first rectangular permanent magnet (hereafter referred to as PM), coupled to said base of said first pole piece, said first rectangular PM having a magnetic field oriented toward said first pole piece and perpendicular to said longitudinal axis;
• a second rectangular PM coupled to said base of said second pole piece, said second rectangular PM having a magnetic field oriented away from said second pole piece and perpendicular to said longitudinal axis, said first rectangular PM and said second rectangular PM thereby establishing a magnetic field between each said tip;
• a first pair of rectangular PMs, each coupled to an opposing side of said first rectangular PM, each having a magnetic field oriented toward said first rectangular PM;
• a second pair of rectangular PMs, each coupled to an opposing side of said second rectangular PM, each having a magnetic field oriented away from said second rectangular PM;
• and,
• a pair of blocking magnets, each forming an opposing side of said rectangular gap adjacent to each said tip to prevent fringing, each said blocking magnet coupling one of said first pair of rectangular PMs to one of said second pair of rectangular PMs, each said blocking magnet having a magnetic field oriented toward said one of said first pair of rectangular PMs to form a magnetic circuit between said first pole piece and said second pole piece.

A dipole permanent magnet structure having a rectangular gap about a longitudinal axis, comprising:

• a first pole piece and a second pole piece, each having 1) a tip forming an opposing side of said rectangular gap, 2) a base, and 3) and two sides adjacent said tip and said base, partially tapered so that said base is wider than said tip;
• a first rectangular permanent magnet coupled to said base of said first pole piece, having a magnetic field oriented in a direction toward said first pole piece;
• a second rectangular permanent magnet coupled to said base of said second pole piece, having a magnetic field oriented in a direction away from said second pole piece;
• a first pair of rectangular permanent magnets each coupled on opposing sides of said first pole piece and said first rectangular permanent magnet, each having a magnetic field oriented in a direction toward said first pole piece so that lines of flux enter said first pole piece from said first rectangular permanent magnet and said first pair of rectangular permanent magnets;
• a second pair of rectangular permanent magnets each coupled on opposing sides of said second pole piece and said second rectangular permanent magnet, each having a magnetic field oriented in a direction away from said second pole piece so that lines of flux flow from said second pole piece to said second rectangular permanent magnet and said second pair of rectangular permanent magnets;
• and,
• a pair of blocking magnets, each forming an opposing side of said rectangular gap adjacent to each said tip, each said blocking magnet coupling one of said first pair of rectangular permanent magnets to one of said second pair of rectangular permanent magnets, each said blocking magnet having a magnetic field oriented toward said one of said first pair of rectangular permanent magnets to form a magnetic circuit between said first pole piece and said second pole piece.