Abb Schweiz Ag

Baldor Electric Company

Other

Reliance Electric Technologies, LLC

William E Martin

Robert McElveen

Stephen T Evon

Robert F McElveen, Jr

Nicolas W Frank

Ghanshyam Shrestha

Colin Tschida

Jerry L Martin

Barron D Grant

Paul Humphries

Lyana J Lance

John M Zedek

David McKinney

Robert Hallman, Sr

Timothy Cain

Adam Walker

Andreas A Meyers

Steven T Evon

The disclosed embodiments describe a tapped winding stator for use in an electric motor. In some embodiments, the electric motor includes a stator body. In some embodiments, a plurality of teeth that are adjacent in a circumferential direction. In some embodiments, a plurality of slots are formed between the plurality of teeth. In some embodiments, a plurality of coils are mounted in each of the plurality of slots. In some embodiments, the plurality of coils are tapped in a configuration that allows the stator to selectively bypass one or more of the plurality of coils in operation. A plurality of switches are electrically coupled between the configuration and a respective phase supply to the electric motor, each of the switches having at least a first position and a second position.

Tapped winding method for extended constant horsepower speed range

An electric machine includes a stator defining a rotor chamber. A rotor is disposed within the chamber and is configured to rotate about a central axis. The rotor includes a plurality of stacked laminations to form a rotor core. The rotor core has an outer diameter and each of the laminations includes a plurality of magnet slots that are radially spaced apart from the outer diameter and angled inwardly with one end of each magnet slot adjacent to the outer diameter. Each magnet slot has a permanent magnet disposed therein, adjacent pairs of the ferrite permanent magnets defining poles for the rotor. Each magnet slot has two opposite ends that define inner and outer magnet free areas. The outer magnet free areas are adjacent the rotor outer diameter and the inner magnet free areas are radially inwardly positioned. Each outer magnet free area is provided with conductive material.

Permanent magnet rotor with conductive flux barrier

The disclosed embodiments describe a partially caged rotor for use in an interior permanent magnet motor and techniques for fabricating thereof. In some embodiments, a caged rotor includes: a rotor core having a shaft; a rotor cage comprising a plurality of conductor bars; and a plurality of permanent magnets at least partially disposed inside a plurality of mounting holes of the core, the plurality of permanent magnets and the plurality of mounting holes forming a plurality of cavities inside the core; wherein each conductor bar is disposed at a respective cavity of the plurality of cavities such that the plurality of conductor bars is of a number greater or equal to 8 and less or equal to 64.

Permanent magnet rotor with minimal cage

This disclosure provides a consolidated electric motor stator lamination for multiple enclosure types such that a single stator assembly can be used for different classifications of an electric motor. Each layer of the stator lamination includes external features that, when combined with the external features of the other layers in the lamination, can be adapted to conform the electric motor to one of a plurality of enclosure types. The external features include retaining features for one or more covers, fins, and a profile configured to accept cooling tubes. In various embodiments, a single consolidated stator lamination assembly can be adapted to provide a motor having at least two of an open-drip proof (ODP), a totally enclosed fan cooled (TEFC), or a totally enclosed water cooled (TEWC) enclosure classification.

Consolidated stator laminations

An electric machine includes a stator and a rotor. The rotor includes stacked laminations forming a rotor core. The rotor rotates relative to the stator about a central axis. The rotor core has an outer diameter. Each lamination includes a plurality of magnet slots. Each magnet slot includes a ferrite permanent magnet located therein, adjacent pairs of the ferrite permanent magnets defining a number of poles. Each of the laminations includes a plurality of non-circular rotor bar apertures spaced about the central axis of the rotor and disposed adjacent to and radially inward of the rotor outer diameter. A non-cylindrical rotor bar is disposed in each respective of the plurality of rotor bar apertures. The rotor bars are formed of a conductive material, wherein at least some of the plurality of rotor bars collectively form a rotor bar cage.

Permanent magnet machine and rotor therefor

A rotor assembly includes a rotor member and a plurality of permanent magnets. The rotor member has a hub with a central axis and a plurality of spokes extending radially outward relative to the hub. Each spoke has a radially inward end and a radially outward end. Each spoke also has a body section, a mounting section, and a flux barrier section. The body section extends from the radially outward end towards the radially inward end. The mounting section is interconnected to the hub. The flux barrier section is disposed between the body section and the mounting section and has at least one flux restriction web extending between the body section and the mounting section. The flux restriction web magnetically isolates the body section from the mounting section. A permanent magnet is disposed within each magnet-receiving slot between pairs of adjacent spokes. A motor with the rotor assembly is also disclosed.

Rotary electrical machine with spoked rotor

A method includes: (1) providing a rotor for a line start interior permanent magnet motor wherein the rotor has rotor bars slots extending axially along a length of the rotor configured to receive rotor bar material, and magnet slots extending axially along a length of the rotor configured to receive magnetic material; (2) disposing rotor bar material in the rotor bar slots; (3) arranging a first end member on an axial end of the rotor; (4) disposing magnetic material in the magnet slots; (5) magnetizing the magnetic material; and (6) arranging a second end member on the rotor opposite the first end member. The step of arranging the second end member on the rotor occurs after magnetizing the magnetic material.

Method of constructing a rotor for a line start interior permanent magnet motor

Cooling tower fan motor

A method comprises providing a motor with a stator comprising a plurality of laminations stacked side to side to form a contiguous stator core with each of the laminations having a plurality of radial fins projecting outward from a periphery of the lamination, and a rotor with permanent magnets spaced about the rotor configured to synchronously magnetically couple with a rotating magnetic field in the stator. The method further comprises providing a cooling tower with a fan disposed therein having a shaft extending from a center of the fan for rotating the fan. The motor is installed in the cooling tower such that the rotor of the motor is coupled directly to the fan shaft and rotates the fan when the motor is energized during normal operation of the cooling tower.

Method of installing a permanent magnet motor in a cooling tower and a shroud used in connection therewith

Liquid cooled motor

Shroud for cooling tower fan motor

Electric motor

A Battery Powered Light Having Solar and Inductive Charging Means for providing a rechargeable, water-proof light unit for use in fish ponds, swimming pools and the like. The light unit may additionally be hung to decoratively add to the surrounding ambiance. The device includes a rechargeable electrical power source disposed within a hollow, light transmissive housing having an open top portion, a cover releasably and sealably attachable to the open top portion, a light source disposed within the housing and operatively coupled to the rechargeable electrical power source, and a solar cell array disposed upon the cover and operatively coupled to the rechargeable electrical power source. A voltage divider circuit including a resistor and a cadmium sulfide cell disposed on the cover is operatively coupled to the light source to provide for selective energizing and de-energizing of the light source.

Battery powered light having solar and inductive charging means

Apparatus making foldable box blanks of pre-printed corrugated material by continuously delivering pre-printed web material to a reciprocating press which is operated intermittently to cut and score the web material and utilizing an accumulator mechanism which receives the pre-printed web material continuously and delivers it intermittently.

Growing community of inventors

Greenville, SC, United States of America

William E Martin