Nidec Motor Corporation

Emerson Electric Company

Kenneth R Friedman

Ronald W Schmidt

R Todd Middleton

Steven Paul Randall

John T Scoble, Iii

Stephen M Ruffing

Ron J Bourgeois

An electric motor is provided. The rotor includes a rotor shaft, with a bearing rotatably supporting the rotor shaft. A bearing housing is interposed between the bearing and the motor frame assembly. The bearing housing is releasably connected to the motor frame assembly so as to be selectively secured in supporting relationship with the bearing and thereby the rotor. The motor frame assembly includes a circumferentially extending support face. The bearing housing presents a circumferentially extending engagement face which engages the support face when the bearing housing is in the supporting relationship. At least one of the faces is axially tapered to facilitate axial movement of the bearing into the supporting relationship.

Tapered bearing housing at coupled end of close-coupled motor

An electric motor is provided. The stator includes a core and a stator cage. The stator core is comprised of a plurality of axially stacked laminations. The stator cage includes a pair of end plates positioned adjacent the axial ends of the rotor core. The stator cage also includes at least one axially extending bar that interconnects the end plates. The stator core, the end plates, and the at least one bar are interconnected to form an integral body that is supported on the motor frame. The at least one bar presents opposite ends and includes a bore that projects axially from one of the ends. The bore is exposed to facilitate lifting of the stator.

Stator cage for large motor

An electric motor is provided. The motor includes a motor frame assembly including a motor frame and a motor housing. A stator is fixed relative to the motor frame assembly. A rotor including a rotor shaft is mounted in the motor frame assembly for rotational movement relative to the motor frame assembly about an axis. A rotor jack is operable to selectively support the rotor shaft. The rotor jack is shiftably coupled relative to the motor frame assembly for movement between a support position, in which the jack is shifted into supporting contact with the rotor shaft, and a retracted position, in which the jack is spaced from the rotor shaft.

Rotor shaft jack

An electric motor is provided. A rotor sensor mechanism is operable to sense a condition of the rotor. The rotor sensor mechanism includes a target component, a radial sensor, and a sensor carrier. The target component comprises a shutter wheel fixed relative to the rotor for rotational movement therewith. The shutter wheel includes a plurality of circumferentially spaced, radially projecting radial target teeth. The radial sensor is configured to sense the target teeth. The radial sensor is at least generally axially aligned with the radial target teeth and faces radially toward the radial target teeth. The sensor carrier adjustably supports the radial sensor on the motor frame assembly so as to permit the radial sensor to be selectively positioned relative to the radial target teeth.

Internal rotor sensor having adjustable sensor carrier

An electric motor having a housing, a stator mounted in the housing, and a rotor mounted in the housing for rotation relative to the stator about a central axis. A plurality of fluid flow passages extend through the rotor between opposite ends. An electro-magnetic drive system is adapted for driving rotation of the rotor relative to the stator. A fluid circulation system is in fluid communication with the fluid flow passages for providing fluid flow from the first end of the rotor to the second end of the rotor through at least one of the fluid flow passages and fluid flow from the second end of the rotor to the first end of the rotor through at least one other of the fluid flow passages. The rotor and components of the fluid circulation can be assembled to make a rotor assembly.

Electric motor having fluid circulation system and methods for cooling an electric motor

An air-cooled weather-protected motor () configured for vertical-shaft applications, such as mounting above an outdoor, vertical-shafted pump (P) for pumping fluid (e.g., water, oil, etc.) through a pipeline (L), is disclosed. The illustrated motor () broadly includes a stator (), a shafted rotor assembly () rotatably supported relative to the stator (), and a vented protective motor enclosure () enclosing the stator () and the rotor assembly (). The enclosure () includes a primary motor housing () and a pair of filtration boxes () and () removably coupled to either side of the housing () to guard air intake through the housing () to the stator () and the rotor assembly (). The improved motor enclosure () provides an inventive coupling mechanism that enables the modular filtration housings () to be quickly and easily secured to the primary motor housing () to protect the air intake openings () from weather and other undesired debris. The housings () comply with the NEMA standards for a weather-protected Type II motor and thus enable a weather-protected Type I motor to be quickly and easily converted to a Type II motor. When assembled on the motor () according to a preferred embodiment, the pair of filtration housings () provide optimal and uniform cooling of the motor () and enable a symmetrical, balanced motor () that can be tested on a horizontal dynamometer with the housings () attached.

Weather protected modular motor enclosure

An air-cooled weather-protected motor ( ) configured for vertical-shaft applications, such as mounting above an outdoor, vertical-shafted pump (P) for pumping fluid (e.g., water, oil, etc.) through a pipeline (L), is disclosed. The illustrated motor ( ) broadly includes a stator ( ), a shafted rotor assembly ( ) rotatably supported relative to the stator ( ), and a vented protective motor enclosure ( ) enclosing the stator ( ) and the rotor assembly ( ). The enclosure ( ) includes a primary motor housing ( ) and a pair of filtration boxes ( ) and ( ) removably coupled to either side of the housing ( ) to guard air intake through the housing ( ) to the stator ( ) and the rotor assembly ( ). The improved motor enclosure ( ) provides an inventive coupling mechanism that enables the modular filtration housings ( ) to be quickly and easily secured to the primary motor housing ( ) to protect the air intake openings ( ) from weather and other undesired debris. The housings ( ) comply with the NEMA standards for a weather-protected Type II motor and thus enable a weather-protected Type I motor to be quickly and easily converted to a Type II motor. When assembled on the motor ( ) according to a preferred embodiment, the pair of filtration housings ( ) provide optimal and uniform cooling of the motor ( ) and enable a symmetrical, balanced motor ( ) that can be tested on a horizontal dynamometer with the housings ( ) attached.

Growing community of inventors

Smithton, IL, United States of America

Kenneth R Friedman