In one exemplary embodiment, an electric machine includes a stator having a plurality of axial protrusions forming a plurality of stator cooling channels on a radially outer surface of the stator and a tapered portion located adjacent a distal end of at least one of the plurality of protrusions. Additionally, the disclosure includes a method for cooling the electric machine.

An article is presented. The article includes one or more ceramic insulators having a plurality of recesses including a first portion having a first set of recesses of the plurality of recesses and a second portion having a second set of recesses of the plurality of recesses. At least a portion of a first conductor and at least a portion of a first cooling channel are overlappingly disposed in a recess of the first set of recesses. At least a portion of a second conductor and at least a portion of a second cooling channel are disposed in at least one recess of the second set of recesses wherein the at least a portion of the second cooling channel offsets from the at least a portion of the second conductor. A system including the article is also presented.

An article is presented. The article includes one or more ceramic insulators having a plurality of recesses including a first portion having a first set of recesses of the plurality of recesses and a second portion having a second set of recesses of the plurality of recesses. At least a portion of a first conductor and at least a portion of a first cooling channel are overlappingly disposed in a recess of the first set of recesses. At least a portion of a second conductor and at least a portion of a second cooling channel are disposed in at least one recess of the second set of recesses wherein the at least a portion of the second cooling channel offsets from the at least a portion of the second conductor. A system including the article is also presented.

A motor includes a motor main body including a rotor and a stator, a controller, a housing, and a connector. The housing includes a lower housing that holds the motor main body, and an upper housing that holds the controller and the connector. The upper housing includes a connector holder that protrudes outward in the radial direction from an outer peripheral end of the lower housing. The connector holder includes a connector inserting portion into which the connector is inserted in the axial direction. The connector inserting portion includes a ridge portion, which protrudes outward in the radial direction from a straight line connecting both ends of an inner-peripheral-side wall surface in the circumferential direction, on the inner-peripheral-side wall surface facing, in the radial direction, a surface of the connector facing inward in the radial direction.

A motor includes a motor main body including a rotor and a stator, a controller, a housing, and a connector. The housing includes a lower housing that holds the motor main body, and an upper housing that holds the controller and the connector. The upper housing includes a connector holder that protrudes outward in the radial direction from an outer peripheral end of the lower housing. The connector holder includes a connector inserting portion into which the connector is inserted in the axial direction. The connector inserting portion includes a ridge portion, which protrudes outward in the radial direction from a straight line connecting both ends of an inner-peripheral-side wall surface in the circumferential direction, on the inner-peripheral-side wall surface facing, in the radial direction, a surface of the connector facing inward in the radial direction.

An electrical machine with a rotor or the stator including a plurality of discrete field modules, and the other one of the rotor and the stator including a plurality of armature coils connected to different power converters. Each field module includes one or more field coils which can be activated independent of the field coils of the neighbouring field modules. When at least one of the field coils is inactivated, e.g. because of a defect, each of the power converters is allowing less power to pass through when an armature coil connected to it is moving over an inactivated field coil, and more power to pass through when the armature coil connected to it is moving over an activated field coil.

An electrical machine with a rotor or the stator including a plurality of discrete field modules, and the other one of the rotor and the stator including a plurality of armature coils connected to different power converters. Each field module includes one or more field coils which can be activated independent of the field coils of the neighbouring field modules. When at least one of the field coils is inactivated, e.g. because of a defect, each of the power converters is allowing less power to pass through when an armature coil connected to it is moving over an inactivated field coil, and more power to pass through when the armature coil connected to it is moving over an activated field coil.

A fuel and oil system comprising a fuel pump; an oil pump. A first electric motor controller configured to supply a variable electrical drive. A second electric motor controller configured to supply a variable electrical drive. A fixed electrical drive. The fuel pump is selectively connected to and driven by the first electric motor controller or the second electric motor controller. The oil pump is selectively connected to and driven by the second electric motor controller or the fixed electrical drive.

A fuel and oil system comprising a fuel pump; an oil pump. A first electric motor controller configured to supply a variable electrical drive. A second electric motor controller configured to supply a variable electrical drive. A fixed electrical drive. The fuel pump is selectively connected to and driven by the first electric motor controller or the second electric motor controller. The oil pump is selectively connected to and driven by the second electric motor controller or the fixed electrical drive.

The motor includes: a rotor; an enclosure member H having a front housing, a rear housing, and a stator surrounding the rotor; an output shaft-side coolant supply port arranged on the outer circumference of the enclosure member, output shaft-side coolant supply paths that supply coolant from the output shaft-side coolant supply port to an output shaft side; an counter-output shaft-side coolant supply port arranged on the outer circumference of the enclosure member; counter-output shaft-side coolant supply paths that supply coolant from the counter-output shaft-side supply port to the counter-output shaft side; a temperature measurement unit that measures the temperature of the enclosure member; switching parts that switch between a plurality of coolants based on the temperature of the enclosure member measured by the temperature measurement unit; and coolant flow paths that connect the output shaft-side coolant supply port and counter-output shaft-side coolant supply port to the switching parts.