Abstract: A dynamoelectric device cooling air flow baffle is given a shape that increases its heat transfer and cooling efficiency by providing the baffle with an annular concave surface around its outer perimeter edge that redirects air flow radially inwardly around stator winding end turns while reducing separation of the air flow and also directs the cooling air flow around an inner edge of a center hole of the baffle while reducing separation of the air flow and increasing air flow velocity, thereby efficiently cooling the stator assembly of the dynamoelectric device.

Abstract: The cooling of an electric motor is optimized by the housing of the motor being provided with inlet vent holes that are positioned and sized to increase a total air flow rate through the housing interior and by the interior surface of the housing being shaped to conform to the stator winding end turns of the motor to direct a flow of cooling air around a greater surface area of the winding end turns before being exhausted through outlet vent holes of the housing.

Abstract: A cooling jacket for cooling the stator of an electric machine. The jacket includes a cooling jacket body having a cylindric inner surface defining a cavity for receiving the stator of a motor, axial flow passages in the body for the flow of a coolant, and end caps connected to opposite ends of the body. Coolant flows through an inlet in one of the end caps and is directed through the flow passages along at least one serpentine path to an outlet. Each flow passage has a cross sectional shape defined entirely by three or more substantially linear sides.

Abstract: The cooling of an electric motor is optimized by the housing of the motor being provided with inlet vent holes that are positioned and sized to increase a total air flow rate through the housing interior and by the interior surface of the housing being shaped to conform to the stator winding end turns of the motor to direct a flow of cooling air around a greater surface area of the winding end turns before being exhausted through outlet vent holes of the housing.

Abstract: A cooling jacket for cooling the stator of an electric machine. The jacket includes a cooling jacket body having a cylindric inner surface defining a cavity for receiving the stator of a motor, axial flow passages in the body for the flow of a coolant, and end caps connected to opposite ends of the body. Coolant flows through an inlet in one of the end caps and is directed through the flow passages along at least one serpentine path to an outlet. Each flow passage has a cross sectional shape defined entirely by three or more substantially linear sides.

Abstract: A deep well submersible pump has a pump housing containing an electric motor. The motor is radially spaced from the pump housing interior surface defining an annular channel through the pump housing from an inlet opening to an outlet opening of the housing. The motor is mounted on a cowling that has an exterior surface. A plurality of deswirler blades extend between the pump housing interior surface and the cowling exterior surface. As the deswirler blades extend through the housing interior, a spacing between the cowling exterior surface and the housing interior surface expands radially. The cowling exterior surface and the pump housing interior surface define an annular liquid flow path that is first directed radially outward from the inlet opening and then curves around the cowling and is directed axially through the deswirler blades to the annular channel between the motor and the pump housing interior surface.

Abstract: A deep well submersible pump has a pump housing containing an electric motor. The motor is radially spaced from the pump housing interior surface defining an annular channel through the pump housing from an inlet opening to an outlet opening of the housing. The motor is mounted on a cowling that has an exterior surface. A plurality of deswirler blades extend between the pump housing interior surface and the cowling exterior surface. As the deswirler blades extend through the housing interior, a spacing between the-cowling exterior surface and the housing interior surface expands radially. The cowling exterior surface and the pump housing interior surface define an annular liquid flow path that is first directed radially outward from the inlet opening and then curves around the cowling and is directed axially through the deswirler blades to the annular channel between the motor and the pump housing interior surface.

Abstract: A dynamoelectric device cooling air flow baffle is given a shape that increases its heat transfer and cooling efficiency by providing the baffle with an annular concave surface around its outer perimeter edge that redirects air flow radially inwardly around stator winding end turns while reducing separation of the air flow and also directs the cooling air flow around an inner edge of a center hole of the baffle while reducing separation of the air flow and increasing air flow velocity, thereby efficiently cooling the stator assembly of the dynamoelectric device.

Abstract: A two sided radial fan draws cooling air into axially opposite ends of a dynamoelectric device drawing the flow of air into one axial end of the device and directing the flow of air over the device exterior surface, and drawing a second flow of air into an opposite axial end of the device and through the interior of the device before redirecting the second flow of air over the exterior of the device. The two sided fan thereby provides greater cooling efficiency to the device without significantly increasing the size of the fan or the device and without significantly increasing the costs or adding additional components to the device construction.

Abstract: A two sided radial fan draws cooling air into axially opposite ends of a dynamoelectric device drawing the flow of air into one axial end of the device and directing the flow of air over the device exterior surface, and drawing a second flow of air into an opposite axial end of the device and through the interior of the device before redirecting the second flow of air over the exterior of the device. The two sided fan thereby provides greater cooling efficiency to the device without significantly increasing the size of the fan or the device and without significantly increasing the costs or adding additional components to the device construction.

Abstract: A fan has a plurality of blades that are each configured to induce radial-flow adjacent the trailing edge of the blade while also being configured to induce both radial-flow and axial-flow near the base end of the blade. This is achieved by splitting each of the blades into two sections and orienting the chord-line of the blades near the hub of the fan at angle relative to the axis of the hub while maintaining the chord-line of the blades parallel to the axis near the trailing edges of the blades. This results in an increased ability of the fan to draw air in axially as compared to conventional radial-flow fans. The fan of the preferred embodiment also makes use of an annular ring joining the trailing edges of the blades.

Abstract: A fan has a plurality of blades that are each configured to induce radial-flow adjacent the trailing edge of the blade while also being configured to induce both radial-flow and axial-flow near the base end of the blade. This is achieved by splitting each of the blades into two sections and orienting the chord-line of the blades near the hub of the fan at angle relative to the axis of the hub while maintaining the chord-line of the blades parallel to the axis near the trailing edges of the blades. This results in an increased ability of the fan to draw air in axially as compared to conventional radial-flow fans. The fan of the preferred embodiment also makes use of an annular ring joining the trailing edges of the blades.

Abstract: A cooling jacket assembly for cooling the stator of an electric machine. The assembly includes an annular cooling jacket body comprising coaxial inner and outer cylindric shells, heat transfer fins in the annular space between the inner and outer shells defining coolant flow channels, and end caps connected to opposite ends of the inner and outer shells. Coolant flows through an inlet in one of the end caps and is directed through the flow channels along at least one serpentine path to an outlet. The serpentine path comprises a plurality of parallel sections extending axially of the cooling jacket body. In one aspect of the invention, each section of the serpentine path comprises a group of two or more flow channels defined by a plurality of adjacent fins.