A linear motor/generator/transmission system includes a guideway with rails and a plurality of stator cores and coils evenly disposed along the length and in the center of the guideway. The system also includes a carriage configured to travel along the guideway having at least two magnet bars with alternating pole magnets, each successive magnet of each magnet bar mounted in front of the other in a direction of travel of the carriage. In embodiments, the magnet bars are mounted parallel to and on either side of a longitudinal centerline of the carriage such that, when adjacent to the center line and each other, the at least two magnet bars are positioned over the stator coils and are configured to be slidably translated away from the center line of the carriage to a position where the at least two magnet bars are not over the stator coils.

A linear motor/generator/transmission system includes a guideway with rails and a plurality of stator cores and coils evenly disposed along the length and in the center of the guideway. The system also includes a carriage configured to travel along the guideway having at least two magnet bars with alternating pole magnets, each successive magnet of each magnet bar mounted in front of the other in a direction of travel of the carriage. In embodiments, the magnet bars are mounted parallel to and on either side of a longitudinal centerline of the carriage such that, when adjacent to the center line and each other, the at least two magnet bars are positioned over the stator coils and are configured to be slidably translated away from the center line of the carriage to a position where the at least two magnet bars are not over the stator coils.

A variable-speed magnetic coupling having a radially movable magnet, comprising a drive disc assembly (I), a driven disc assembly (II), and a speed adjusting device assembly (III). Relative rotation of a speed adjustment sleeve (15) with respect to a drive shaft (16) is achieved by means of contact and fitting of a cylindrical pin (20) with respect to a vertical recess on an inner wall of the drive shaft and to an inclined recess on an inner wall of the speed adjustment sleeve. The speed adjustment sleeve is connected to a circular slotted disc (18) by means of a screw. A permanent magnet (10) is attached to a permanent magnet bearer (9) and inserted into a rectangular through hole of a circular frame (13), and a radial movement of the permanent magnet is enabled by means of a cam and groove sliding block mechanism consisting of the circular slotted disc, the circular frame, the permanent magnet bearer, and the permanent magnet. By moving a movement block (21) to drive the movement pin (20) to slide in the recesses of the drive shaft and the speed adjustment sleeve and then drive the speed adjustment sleeve to rotate, the present invention enables a radial movement of the permanent magnet, and then changes a coupling area or an air gap distance between the permanent magnet and conductive rings (8, 11) on two sides, thus changing a magnetic flux density of the air gap, and accordingly enabling speed adjustment.

A linear motor/generator/transmission system includes a guideway with rails and a plurality of stator cores and coils evenly disposed along the length and in the center of the guideway. The system also includes a carriage configured to travel along the guideway having at least two magnet bars with alternating pole magnets, each successive magnet of each magnet bar mounted in front of the other in a direction of travel of the carriage. In embodiments, the magnet bars are mounted parallel to and on either side of a longitudinal centerline of the carriage such that, when adjacent to the center line and each other, the at least two magnet bars are positioned over the stator coils and are configured to be slidably translated away from the center line of the carriage to a position where the at least two magnet bars are not over the stator coils.

The variable-field rotary electric machine includes: a rotor that is rotatably integrated with a shaft while an axis of the shaft is used as a rotation axis and includes a movable iron core and a displacement mechanism configured to displace the movable iron core in an axial direction of the rotation shaft. The displacement mechanism includes: a cylinder unit including a cylinder chamber to retain hydraulic fluid according to a rotor speed, a piston member connected to the movable iron core, and a sealer member provided at the piston member. The the piston member and the movable iron core are displaced in the axial direction of the rotation shaft in response to an increase or decrease in an amount of the hydraulic fluid in the cylinder chamber.

Apparatus for a motive device that combines a prime mover integrated with one or more drivers for multimodal locomotion. The motive device has an axle configured to connect to a vehicle and has a ground configuration for land travel and a fan configuration for lift and flight. The motive device includes a prime mover integrated with a ground driver and a fan driver. The motive device includes a multitude of stator windings attached to the axle and a multitude of magnets attached to rotors. The ground driver includes a wheel with the spokes extending from at least one rotor. The wheel rotates for land-based locomotion when in the ground configuration. The fan driver includes blades extending from another rotor. The blades rotate for lift and flight when in the fan configuration.

A small turbine generator is connected to a wind turbine. The wind turbine spins freely due to a variable wind force on the wind turbine. The generator includes a spinning rotor that is responsive and spins proportional to spin of the wind turbine. A stator is connected to an actuator. The stator is selectively moved by the actuator nearer to or further from the rotor to vary the electrical power generated. Movement of the stator is controlled such that an electrical measure, such as voltage of the electrical power generated, does not exceed a threshold level.

The variable-field rotary electric machine includes: a rotor that is rotatably integrated with a shaft while an axis of the shaft is used as a rotation axis and includes a movable iron core and a displacement mechanism configured to displace the movable iron core in an axial direction of the rotation shaft. The displacement mechanism includes: a cylinder unit including a cylinder chamber to retain hydraulic fluid according to a rotor speed, a piston member connected to the movable iron core, and a sealer member provided at the piston member. The the piston member and the movable iron core are displaced in the axial direction of the rotation shaft in response to an increase or decrease in an amount of the hydraulic fluid in the cylinder chamber.

A variable-speed magnetic coupling having a radially movable magnet, comprising a drive disc assembly (I), a driven disc assembly (II), and a speed adjusting device assembly (III). Relative rotation of a speed adjustment sleeve (15) with respect to a drive shaft (16) is achieved by means of contact and fitting of a cylindrical pin (20) with respect to a vertical recess on an inner wall of the drive shaft and to an inclined recess on an inner wall of the speed adjustment sleeve. The speed adjustment sleeve is connected to a circular slotted disc (18) by means of a screw. A permanent magnet (10) is attached to a permanent magnet bearer (9) and inserted into a rectangular through hole of a circular frame (13), and a radial movement of the permanent magnet is enabled by means of a cam and groove sliding block mechanism consisting of the circular slotted disc, the circular frame, the permanent magnet bearer, and the permanent magnet. By moving a movement block (21) to drive the movement pin (20) to slide in the recesses of the drive shaft and the speed adjustment sleeve and then drive the speed adjustment sleeve to rotate, the present invention enables a radial movement of the permanent magnet, and then changes a coupling area or an air gap distance between the permanent magnet and conductive rings (8, 11) on two sides, thus changing a magnetic flux density of the air gap, and accordingly enabling speed adjustment.

A roller device for a traction mechanism drive of a motor vehicle, with a roller element for introducing a torque provided via the traction mechanism and a driven shaft for driving an auxiliary unit. The roller device has a magnetic coupling for non-positive torque transfer between the roller element and the driven shaft. The magnetic coupling has a primary-side unit connected to the roller element with a primary magnetic element and a secondary-side unit connected to the driven shaft with a secondary-side magnetic element. The magnetic elements are permanent and/or electromagnetic elements. The non-positive torque transfer is realized by magnetic fields of the primary-side and secondary-side magnetic elements. At least one magnetic element of the two units for changing the magnetic field overlap of the magnetic fields of the primary-side and secondary-side magnetic elements is movably arranged within its unit. A corresponding traction mechanism drive and method are provided.