A pump system for pumping production fluids from a wellbore or pumping well treatment fluids into a wellbore comprising: an axial flux electric motor; a seal section coupled to the axial flux motor; a pump intake coupled to the seal section; a pump coupled to the pump intake, and a fluid discharge coupled to the pump. The torque capacity axial flux motor may be modified without removing the axial flux motor from the pump.

A pump system for pumping production fluids from a wellbore or pumping well treatment fluids into a wellbore comprising: an axial flux electric motor; a seal section coupled to the axial flux motor; a pump intake coupled to the seal section; a pump coupled to the pump intake, and a fluid discharge coupled to the pump. The torque capacity axial flux motor may be modified without removing the axial flux motor from the pump.

A pump system for pumping production fluids from a wellbore or pumping well treatment fluids into a wellbore comprising: an axial flux electric motor; a seal section coupled to the axial flux motor; a pump intake coupled to the seal section; a pump coupled to the pump intake, and a fluid discharge coupled to the pump. The torque capacity axial flux motor may be modified without removing the axial flux motor from the pump.

A pump system for pumping production fluids from a wellbore or pumping well treatment fluids into a wellbore comprising: an axial flux electric motor; a seal section coupled to the axial flux motor; a pump intake coupled to the seal section; a pump coupled to the pump intake, and a fluid discharge coupled to the pump. The torque capacity axial flux motor may be modified without removing the axial flux motor from the pump.

A pump system for pumping production fluids from a wellbore or pumping well treatment fluids into a wellbore comprising: an axial flux electric motor; a seal section coupled to the axial flux motor; a pump intake coupled to the seal section; a pump coupled to the pump intake, and a fluid discharge coupled to the pump. The torque capacity axial flux motor may be modified without removing the axial flux motor from the pump.

A rotor for an electric machine having posts extending partially or completely between end irons. Each end iron is formed of a single piece of magnetic material with the posts extending from it, including the other end iron where the posts extend completely between them. Magnets are arranged between the posts with poles facing the posts to concentrate flux. In order to prevent too much of the flux from being drawn into flux paths through the end irons, the total magnetic flux is made to exceed a saturation flux of at least a portion of the flux path. This may be achieved by using interdigitated posts extending only partially between the end irons to provide gaps in the flux path, by providing flux resistors in the end irons to reduce a saturation flux below the total flux, or by using high aspect ratio magnets or posts so that the magnetic flux exceeds a saturation flux of the posts or end irons.

A stator of a brushless motor includes a stator core and a plurality of coils. The stator core includes a base portion having an annular plate shape and a plurality of teeth protruding from one surface of the base portion in an axial direction and disposed in a circumferential direction. The plurality of coils is respectively wound by concentrated winding along peripheral surfaces of the plurality of teeth. The base portion includes an inner circumferential edge that is recessed radially outward from an inner end of each of the plurality of teeth or the base portion includes an outer circumferential edge that is recessed radially inward from an outer end of each of the plurality of teeth.

An electric motor which comprises: (A) a rotor which comprises: (a.1) a co-centric shaft and disk; and (a.2) a plurality of permanent magnets that are equi-angularly spaced and equi-radially disposed on said disk in a ring-like structure! and, (B) a stator which comprises: (b.1) a plurality of coils having a U-shaped structure in top view and double C-shaped structure in side view, said coils are equi-angularly spaced and equi-radially disposed with respect to said disk of the rotor, each section of said C-shaped structure has a cavity through which said ring-like structure and disk rotationally move; and (b.2) a plurality-of-windings coil within each of said U-shaped coils.

An axial gap motor includes: a first stator and a second stator disposed to be opposite to each other in an axial direction; and a rotor including a first magnet layer in which a plurality of first main magnetic pole magnets and a plurality of first auxiliary pole magnets are arranged in a Halbach array in a circumferential direction to increase a magnetic field strength toward the first stator and a second magnet layer in which a plurality of second main magnetic pole magnets and a plurality of second auxiliary pole magnets are arranged in a Halbach array in the circumferential direction to increase a magnetic field strength toward the second stator between the first stator and the second stator.

In a robot including a manipulator including a plurality of joints and a base configured to support the manipulator, a joint closest to the base side among the plurality of joints includes a first motor of an axial gap type, and a joint closest to a distal end side of the manipulator among the plurality of joints includes a distal end motor of a radial gap type.