Motor and apparatus using the same
AssigneeCanon Kabushiki Kaisha
InventorTakeshi Yamamoto
Life of this patent
Estimating the term…
Abstract
A motor includes: a first portion that includes a plurality of permanent magnets; and a second portion that includes a plurality of coils, wherein the first portion or the second portion is configured to be rotatable around a rotation axis, wherein the plurality of permanent magnets are circumferentially arranged about the rotation axis, and wherein the plurality of coils are arranged so as to face the plurality of permanent magnets in a direction along the rotation axis, and the motor further includes: a control unit that controls a rotational speed and an attitude of the rotating first portion or the rotating second portion by controlling currents that are applied to the plurality of coils.
Claims20
A motor comprising:
- a first portion that includes a plurality of permanent magnets;
- a second portion that includes a plurality of coils, wherein the first portion or the second portion is configured to be rotatable around a rotation axis;
- and
- a control circuit that controls a rotational speed and an attitude of the first portion when it rotates or the second portion when it rotates, by controlling currents that are applied to the plurality of coils,
- wherein the plurality of permanent magnets are circumferentially arranged about the rotation axis,
- wherein the plurality of coils are arranged so as to face the plurality of permanent magnets in a direction along the rotation axis,
- wherein the plurality of coils are arranged so that the plurality of coils do not overlap each other in the circumferential direction and at least three coils among the plurality of coils circumferentially overlap with each of the plurality of permanent magnets, viewed in the direction along the rotation axis, and
- wherein the control circuit independently controls a current value of each of the plurality of coils.
A motor comprising:
- a first portion that includes a plurality of permanent magnets;
- a second portion that includes a plurality of coils, wherein the first portion or the second portion is configured to be rotatable around a rotation axis;
- and
- a control circuit that controls a rotational speed and an attitude of the first portion when it rotates or the second portion when it rotates, by controlling currents that are applied to the plurality of coils,
- wherein the plurality of permanent magnets are circumferentially arranged about the rotation axis,
- wherein the plurality of coils are arranged so as to face the plurality of permanent magnets in a direction along the rotation axis,
- wherein the plurality of coils are arranged so that the plurality of coils do not overlap each other in the circumferential direction and at least three coils among the plurality of coils circumferentially overlap with each of the plurality of permanent magnets, viewed in the direction along the rotation axis, and
- wherein each coil is provided with an individual current sensor.
Dependencies are inferred from the claim text.