Patent ID: 9059627
Filing Date: 2015-06-16
Classification: H02K

Abstract:
1. A permanent-magnet coupling for synchronously transmitting torque, the coupling comprising: a first member rotatable about an axis and having a first array of rectangularly parallelepipedal first permanent magnets and a second array of rectangularly parallelepipedal second permanent magnets; a rotatable second member rotatable about the axis, nested with the first member, and separated by an axially extending air gap therefrom, whereby for synchronous rotation the members are coupled by forces that are generated by the permanent magnets in interaction with the second member, the first permanent magnets having magnetization directions running parallel to the air gap and the second array of second permanent magnets having magnetization directions running perpendicular to the air gap, the first permanent magnets of the first array and the second permanent magnets of the second array of the first member alternating angularly with adjacent first permanent magnets of the first array as well as adjacent second permanent magnets of the second array having opposing magnetization directions, the second permanent magnets of the second array starting from the air gap being set radially back with respect to the first permanent magnets of the first array so as to form between the air gap and each of the second permanent magnets of the second array a spaces free of permanent magnets, angularly delimited by the first permanent magnets of the first array, and extending a full radial height of the first permanent magnets.