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US 2025/0038634 A1Published application
Smooth skipping and rolo-skip electrical motors
AssigneeHerzel Laor
InventorHerzel Laor
Life of this patent
Estimating the term…
Abstract
A skipper motor comprising: a stator and a rotor; a plurality of N greater than two electromagnets mounted to the stator or to the rotor, each of the electromagnets comprising a core having at least one contact surface, wherein the at least one contact surface of any of the cores is rotatable about a same first axis of rotation with a same first radius of rotation into substantial congruence with at least a portion of the at least one contact surface of any other of the electromagnet cores; and a coupling of the rotor to the stator configured to enable rotation of the rotor and contact of the stator and rotor along at least one contact surface during operation of the motor.
Claims20
A skipper motor comprising:
- a stator and a rotor;
- a plurality of N greater than two electromagnets mounted to the stator or to the rotor, each of the electromagnets comprising ferromagnetic core having at least one contact surface, wherein the at least one contact surface of any of the cores is rotatable about a same first axis of rotation with a same first radius of rotation into substantial congruence with at least a portion of the at least one contact surface of any other of the electromagnet cores;
- a coupling of the rotor to the stator configured to enable rotation of the rotor and contact of the stator and rotor along at least one contact surface during operation of the motor;
- and
- a controller;
- wherein energizing two of the electromagnets to magnetize their respective cores and energizing one of the electromagnets to remove a magnetic B-field in its core causes the rotor to rotate and the controller is operable to energize the electromagnets to cause the rotor to rotate from a first motor state of the skipper motor in which the stator and rotor are in contact along a first pair of contact surfaces comprising a contact surface from each core of a first pair of first and second rotationally adjacent electromagnets mounted to the stator or rotor and matching surface regions of the rotor or stator respectively, to a second motor state in which the stator and rotor are in contact along a second pair of contact surfaces comprising a contact surface from each core of a second pair of rotationally adjacent electromagnets comprising the first electromagnet and a third electromagnet rotationally adjacent the second electromagnet and matching surface regions of the rotor or stator respectively;
- wherein to initiate rotation from the first motor state to the second motor state the controller energizes the first and third electromagnets with respective first and third current so that magnetic flux generated in the core of the second electromagnet by energization of the first electromagnet substantially cancels magnetic flux generated in the core of the second electromagnet by energization of the third electromagnet.
4 more elements
A skipper motor comprising:
- a stator and a rotor;
- a plurality of N greater than two electromagnets mounted to the stator or to the rotor, each of the electromagnets comprising a ferromagnetic core having at least one contact surface, wherein the at least one contact surface of any of the cores is rotatable about a same first axis of rotation with a same first radius of rotation into substantial congruence with at least a portion of the at least one contact surface of any other of the electromagnet cores;
- a coupling of the rotor to the stator configured to enable rotation of the rotor and contact of the stator and rotor along at least one contact surface during operation of the motor;
- and
- a controller;
- wherein energizing two of the electromagnets to magnetize their respective cores and energizing one of the electromagnets to remove a magnetic B-field in its core causes the rotor to rotate and the controller is operable to energize the electromagnets to cause the rotor to rotate from a first motor state of the skipper motor in which the stator and rotor are in contact along a first pair of contact surfaces comprising a contact surface from each core of a first pair of first and second rotationally adjacent electromagnets mounted to the stator or rotor and matching surface regions of the rotor or stator respectively, to a second motor state in which the stator and rotor are in contact along a second pair of contact surfaces comprising a contact surface from each core of a second pair of rotationally adjacent electromagnets comprising the first electromagnet and a third electromagnet rotationally adjacent the second electromagnet and matching surface regions of the rotor or stator respectively;
- wherein when there is substantially no air gap in a magnetic circuit through the cores of the first and second electromagnets, the magnetic circuit has a length Lo, a magnetic circuit through the third electromagnet has an air gap of length δ, and Lo and δ satisfy a relationship δ<3Lo/μ(m)r where μ(m)r is the magnetic permeability of the ferromagnetic parts of the skipping motor are formed.
4 more elements
Dependencies are inferred from the claim text.