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US 2018/0102687 A1Published application
Electromagnetic torque motor with high torque and limited angle
OwnerMohamed Ahmed ELGAMILinventor
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OwnerMohamed Ahmed ELGAMILinventor
Estimating the term…
The torque motor in this patent depends on decreasing the gap between a surface on a fixed part and a corresponding inclined facing surface on a rotating part, where the gap width is proportional to its distance from the angle vertex, in magnifying the electromagnetic force and its resulting torque. Therefore, the surface on the fixed part starts directly at—or close to—a point in align with the rotating part center of rotation, and hence the gap width is minimum at the start point and increases away from this point due to the inclination angle. The motor may have various features such as utilizing many pairs of facing surfaces, many electromagnetic circuits; arrange the surfaces in pairs for balanced forces, works in one or two directions, the two directions electromagnetic circuits installed in one or two levels. Precautions and ways to avoid magnetic field interference and leakage should be considered.
An electromagnetic torque motor with limited angular displacement consists of a rotating part and one of more fixed parts, each fixed part with two or more ends, the fixed part(s) ends' surfaces face one or more corresponding surfaces on the rotating part. The facing surfaces are separated with gaps which are preferred to be of zero value when the surfaces are in the closest position, and when the rotating part is displaced, the gap is generated between them
The electromagnetic torque motor with limited angular displacement as in item 1, in which the fixed part facing surface at its end starts at a point in align with the rotating part center of rotation, or close to it, and extends in one side of the center of rotation in such a way that its generated pulling electromagnetic forces produce torques in one direction
The electromagnetic torque motor with limited angular displacement as in items 1 and 2, where the two facing pair surfaces that generate pulling forces are distributed in such a way that they generate torques in the same direction and doesn't oppose each other
The electromagnetic torque motor with limited angular displacement as in item 1, 2 and 3, wherein the closeness between the facing surfaces of the fixed and rotating parts due to their inclination and existence near the angle vertex are utilized. The gap width between the two facing surfaces is smallest at the vertex side and largest at the other side
The electromagnetic torque motor with limited angular displacement as in item 1 to 4 wherein the two facing surfaces at the two fixed part ends are facing two surfaces on the rotating part in such a way that the resultant of the electromagnetic pulling forces is zero force and a pure torque couple
The electromagnetic torque motor with limited angular displacement as in item 1 to 5 wherein more than one facing surfaces pair and one electromagnetic circuits are utilized
The electromagnetic torque motor with limited angular displacement as in item 6 wherein surface pairs are arranged in such a way that no contradiction between torques as in item 3, and all forces are balanced as in item 5
The electromagnetic torque motor with limited angular displacement as in item 1 to 7 wherein more than one electromagnetic group can be used to generate torques in one direction or in the two directions of rotation
The electromagnetic torque motor with limited angular displacement as in item 1 to 8 wherein the groups can be built in one level or in several levels
The electromagnetic torque motor with limited angular displacement as in item 1 to 9 wherein flux isolators or else can be used to prevent flux leakage or interference
The electromagnetic torque motor with limited angular displacement as in item 1 to 10 wherein any means such as permanent magnets or else can be used to improve the performance without considering it a new idea
Dependencies are inferred from the claim text.