Disclosed is a motor. The motor includes a housing part including a housing body, and a housing cover that covers one side of the housing body, a stator provided in an interior of the housing body, a rotor assembly accommodated inside the stator to be rotatable, and having a fluid flow path for causing a cooling fluid introduced to a front side thereof to flow into a rear side that faces the housing cover, and a reflective plate coupled to the rotor assembly, disposed between the rotor assembly and the housing cover, and that defines a fluid spattering path, along which the cooling fluid that flows through the fluid flow path spatters in a radial direction thereof.

An electric motor includes: a rotor including a first rotor core and a second rotor core; and a stator. A minimum distance from the first rotor core to the stator is shorter than a minimum distance from the second rotor core to the stator. A maximum radius of the first rotor core is longer than a maximum radius of the second rotor core. A shape of a first thin-wall part of the first rotor core and a shape of a second thin-wall part of the second rotor core are the same.

An electric motor includes: a rotor including a first rotor core and a second rotor core; and a stator. A minimum distance from the first rotor core to the stator is shorter than a minimum distance from the second rotor core to the stator. A maximum radius of the first rotor core is longer than a maximum radius of the second rotor core. A shape of a first thin-wall part of the first rotor core and a shape of a second thin-wall part of the second rotor core are the same.

A rotary electric machine for use with coolant includes a stator and rotor assembly. The rotor assembly includes a rotor, rotor shaft, and first and second end rings. The rotor has inner and outer diameter surfaces and an embedded set of rotor magnets proximate the outer diameter surface. The shaft is connected to the rotor and defines a main coolant passage along an axis of rotation. Radial shaft coolant passages are in fluid communication with the main coolant passage. The end rings are positioned at opposing distal ends of the rotor. The shaft coolant passages direct the coolant into the rotor and/or the end rings such that the coolant flows axially through rotor cavities of the rotor and cools the rotor magnets via forced convection.

A rotary electric machine for use with coolant includes a stator and rotor assembly. The rotor assembly includes a rotor, rotor shaft, and first and second end rings. The rotor has inner and outer diameter surfaces and an embedded set of rotor magnets proximate the outer diameter surface. The shaft is connected to the rotor and defines a main coolant passage along an axis of rotation. Radial shaft coolant passages are in fluid communication with the main coolant passage. The end rings are positioned at opposing distal ends of the rotor. The shaft coolant passages direct the coolant into the rotor and/or the end rings such that the coolant flows axially through rotor cavities of the rotor and cools the rotor magnets via forced convection.

An integrated power control assembly configured as an inverter for a motor is mounted directly on an axial end of the motor. The integrated power control assembly includes one or more power plates, one or more cooling plates coaxially disposed on and thermally connected to the one or more power plates, and one or more circuit boards circumferentially disposed around the one or more power plates. An individual power plate has a power card having one or more switching semiconductor devices corresponding to individual phases of the motor. The individual power card is electrically coupled to the motor through one or more busbars. An individual circuit board is electrically coupled to an individual power card corresponding to an individual phase of the motor. The individual circuit board has a first surface electrically coupled to the one or more power plates and a second surface opposite to the first surface.

An integrated power control assembly configured as an inverter for a motor is mounted directly on an axial end of the motor. The integrated power control assembly includes one or more power plates, one or more cooling plates coaxially disposed on and thermally connected to the one or more power plates, and one or more circuit boards circumferentially disposed around the one or more power plates. An individual power plate has a power card having one or more switching semiconductor devices corresponding to individual phases of the motor. The individual power card is electrically coupled to the motor through one or more busbars. An individual circuit board is electrically coupled to an individual power card corresponding to an individual phase of the motor. The individual circuit board has a first surface electrically coupled to the one or more power plates and a second surface opposite to the first surface.

Certain embodiments of the present application relate to a variable frequency drive (VFD) cabin for a pump configuration including a mobile trailer on which the VFD cabin is to be mounted. The VFD cabin generally includes a medium-voltage VFD and a ventilation system. In certain embodiments, the ventilation system is configured to generate an overpressure condition within the cabin to discourage the entry of dust and debris into the cabin. In certain embodiments, one or more components of the medium-voltage VFD are coupled to the floor of the cabin via a vibration damping system. In certain embodiments, the VFD cabin may be directly coupled to a chassis of the mobile trailer without an intervening suspension being provided between the VFD cabin and the chassis.

This rotary electric machine includes: an electric motor; a power supply unit including a heat-dissipation member, a power module, and a cover covering the heat-dissipation member and the power module; and a coolant path. A connection portion connecting the electric motor and the power supply unit is provided between the housing and the power supply unit. A cylindrical portion of the cover extends toward the one side in the axial direction and covers the connection portion from the radially outer side. The coolant path is provided at one or both of the heat-dissipation member and an area between the heat-dissipation member and the housing. The coolant path overlaps the power module as seen in the axial direction. The cylindrical portion of the cover has an opening through which a coolant passes, at a circumferential-direction position different from a circumferential-direction position on the radially outer side of the connection portion.

This rotary electric machine includes: an electric motor; a power supply unit including a heat-dissipation member, a power module, and a cover covering the heat-dissipation member and the power module; and a coolant path. A connection portion connecting the electric motor and the power supply unit is provided between the housing and the power supply unit. A cylindrical portion of the cover extends toward the one side in the axial direction and covers the connection portion from the radially outer side. The coolant path is provided at one or both of the heat-dissipation member and an area between the heat-dissipation member and the housing. The coolant path overlaps the power module as seen in the axial direction. The cylindrical portion of the cover has an opening through which a coolant passes, at a circumferential-direction position different from a circumferential-direction position on the radially outer side of the connection portion.