A roller system has a frame, a plurality of rollers (supported by the frame) forming a roller plane, and an external rotor motor (motor) spaced from the roller plane. As an external rotor motor, the motor has a stator and an external rotor radially outward of the stator to substantially circumscribe the stator. To kinetically couple the motor with the rollers, the system also has a transmission coupling coupled with the external rotor and at least one of the rollers. The transmission coupling and external rotor are configured so that rotation of the external rotor causes the at least one roller to rotate in response to a torque received through the transmission coupling.

A roller system has a frame, a plurality of rollers (supported by the frame) forming a roller plane, and an external rotor motor (motor) spaced from the roller plane. As an external rotor motor, the motor has a stator and an external rotor radially outward of the stator to substantially circumscribe the stator. To kinetically couple the motor with the rollers, the system also has a transmission coupling coupled with the external rotor and at least one of the rollers. The transmission coupling and external rotor are configured so that rotation of the external rotor causes the at least one roller to rotate in response to a torque received through the transmission coupling.

A roller system has a frame, a plurality of rollers (supported by the frame) forming a roller plane, and an external rotor motor (motor) spaced from the roller plane. As an external rotor motor, the motor has a stator and an external rotor radially outward of the stator to substantially circumscribe the stator. To kinetically couple the motor with the rollers, the system also has a transmission coupling coupled with the external rotor and at least one of the rollers. The transmission coupling and external rotor are configured so that rotation of the external rotor causes the at least one roller to rotate in response to a torque received through the transmission coupling.

A drive unit for an endless conveyor, comprising a magnetic transmission and an electric motor connected to an input shaft of the magnetic transmission, where the magnetic transmission comprises a rotatable outer cylinder comprising a plurality of permanent magnets arranged as magnetic poles at the inner side of the outer cylinder, an intermediate cylindrical element comprising a plurality of ferromagnetic pole pieces, an inner cylinder comprising a plurality of permanent magnets arranged as magnetic poles at the outer side of the inner cylinder, where the outer side of the outer cylinder is configured with a drive surface adapted to interact with a conveyor belt or conveyor chain. The advantage of the invention is that a compact and efficient drive unit for a conveyor system is provided, which is provided with a contactless predefined slip.

An electric machine includes a rotor including a plurality of permanent magnets. The rotor is rotatable about a central axis of the machine. The machine further includes a stator having a stator hub and a plurality of stator windings positioned at the stator hub and located radially inboard of the plurality of permanent magnets. A plurality of fins extend radially inwardly from an inner surface of the stator hub.

A drive unit for an endless conveyor, comprising a magnetic transmission and an electric motor connected to an input shaft of the magnetic transmission, where the magnetic transmission comprises a rotatable outer cylinder comprising a plurality of permanent magnets arranged as magnetic poles at the inner side of the outer cylinder, an intermediate cylindrical element comprising a plurality of ferromagnetic pole pieces, an inner cylinder comprising a plurality of permanent magnets arranged as magnetic poles at the outer side of the inner cylinder, where the outer side of the outer cylinder is configured with a drive surface adapted to interact with a conveyor belt or conveyor chain. The advantage of the invention is that a compact and efficient drive unit for a conveyor system is provided, which is provided with a contactless predefined slip.

A roller system has a frame, a plurality of rollers (supported by the frame) forming a roller plane, and an external rotor motor (motor) spaced from the roller plane. As an external rotor motor, the motor has a stator and an external rotor radially outward of the stator to substantially circumscribe the stator. To kinetically couple the motor with the rollers, the system also has a transmission coupling coupled with the external rotor and at least one of the rollers. The transmission coupling and external rotor are configured so that rotation of the external rotor causes the at least one roller to rotate in response to a torque received through the transmission coupling.

A lubricant supported electric motor includes a static member and a movable member movably disposed within the static member to define a gap therebetween. The static member may be configured as a stator and the movable member may be configured as a rotor. The movable member may also be configured to move relative to the static member. The static member and movable member are configured to exert an electromagnetic force therebetween and convert electrical energy into mechanical energy and move the movable member. A lubricant is disposed in the gap between the static member and the movable member to support the movable member relative to the static member.

A Vernier external rotor machine for direct drive of a load is provided. The Vernier external rotor machine includes an external rotor configured to mechanically directly drive to a load

Embodiments herein relate to a permanent magnet (PM) motor driven hoist system. The hoist system includes a PM out-runner motor with a stator on a fixed central shaft with stator coils, and an outer rotor assembly coaxial with and rotatable about the stator. The rotor having a rotating housing with an outer surface radially outward of the shaft and an inner surface radially inward of the shaft and plurality of PMs disposed at the inner surface configured to magnetically couple with the stator. The rotating housing coupled to the cable drum such that rotation of the rotor assembly causes rotation of the cable drum. The system also includes a controller connected to a power source and the motor, configured to generate excitation signals applied to the stator coils to induce a torque in the outer rotor assembly and cause it to rotate about the stator and central shaft.