Motor having a magnetic bearing

A motor having a magnetic bearing comprising:

• a base provided with a bearing seat;
• a stator fixed onto the base, a rotor equipped with a rotation shaft and rotating relatively to the stator by magnetic forces generated from excitation;
• a bearing fastened to the bearing seat of the base for accommodating the rotation shaft of the rotor;
• an upper magnetic unit composed of a first and a second magnetic elements, wherein the first magnetic element is located above the second magnetic element to generate a magnetic force therebetween to prevent the contact with each other;
• and
• a lower magnetic unit composed of a third and a fourth magnetic elements, wherein the third magnetic element is located above the fourth magnetic element to generate a magnetic force therebetween to prevent the contact with each other.

A motor having a magnetic bearing comprising:

• a base provided with a bearing seat;
• a stator fixed to the base,
• a rotor equipped with a rotation shaft and rotates relatively to the stator by magnetic forces generated from excitation;
• a bearing fastened to the bearing seat of the base for accommodating the rotation shaft of the rotor;
• a magnetic unit composed of a first and a second magnetic elements, wherein the second magnetic element is located below the first magnetic element to provide an axial magnetic force and compensate the magnetic bias formed between the stator and the rotor, thus obtaining constant magnetic equilibrium.