Rotation drive apparatus and control method thereof, and rotation equipment

A rotation drive apparatus comprising:

• a rotor that includes a first magnetic force unit and is rotatable in a rotation direction around a rotation axis intersecting a direction of gravity;
• a stator that includes a second magnetic force unit;
• a support that supports the rotor positioned in a first position;
• and
• a control unit,
• wherein the first magnetic force unit is arranged circumferentially along the rotation direction on an outer peripheral side surface of the rotor,
• wherein the second magnetic force unit is arranged in an arc shape along the rotation direction above the rotor, and
• wherein, when the rotor is positioned at the first position and a cogging torque with respect to the rotor is equal to or more than a predetermined value, the control unit rotates the rotor to a second position where the cogging torque is less than the predetermined value and levitates the rotor from the second position.

A control method of a rotation drive apparatus comprising:

• a rotor that includes a first magnetic force unit and is rotatable in a rotation direction around a rotation axis intersecting a direction of gravity;
• a stator that includes a second magnetic force unit;
• and a support that supports the rotor positioned in a first position, wherein the first magnetic force unit is arranged circumferentially along the rotation direction on an outer peripheral side surface of the rotor, and wherein the second magnetic force unit is arranged in an arc shape along the rotation direction above the rotor, the control method comprising:
• when the rotor is positioned at the first position and a levitation force with respect to the rotor is less than a predetermined value, rotating the rotor to a second position where the levitation force is equal to or greater than the predetermined value and levitating the rotor from the second position.

A control method of a rotation drive apparatus comprising:

• a rotor that includes a first magnetic force unit and is rotatable in a rotation direction around a rotation axis intersecting a direction of gravity;
• a stator that includes a second magnetic force unit;
• and a support that supports the rotor positioned in a first position, wherein the first magnetic force unit is arranged circumferentially along the rotation direction on an outer peripheral side surface of the rotor, and wherein the second magnetic force unit is arranged in an arc shape along the rotation direction above the rotor, the control method comprising:
• when the rotor is positioned at the first position and a cogging torque with respect to the rotor is equal to or more than a predetermined value, rotating the rotor to a second position where the cogging torque is less than the predetermined value and levitating the rotor from the second position.

Rotation equipment comprising:

• a rotation drive apparatus comprising:
• a rotor that includes a first magnetic force unit and is rotatable in a rotation direction around a rotation axis intersecting a direction of gravity;
• a stator that includes a second magnetic force unit;
• a support that supports the rotor positioned in a first position;
• and
• a control unit,
• wherein the first magnetic force unit is arranged circumferentially along the rotation direction on an outer peripheral side surface of the rotor,
• wherein the second magnetic force unit is arranged in an arc shape along the rotation direction above the rotor, and
• wherein, when the rotor is positioned at the first position and a levitation force with respect to the rotor is less than a predetermined value, the control unit rotates the rotor to a second position where the levitation force is equal to or greater than the predetermined value and levitates the rotor from the second position;
• and
• a component installed in the rotor.