Abb Schweiz Ag

Colin Tschida

Darren Dale Tremelling

Sheng Zhong

Ghanshyam Shrestha

Dariusz Bednarowski

Lukasz Malinowski

Francesco Agostini

Pietro Cairoli

Elio Alberto Perigo

Luca Raciti

Kathryn F Murphy

Paul Humphries

Zhiguo Pan

Daniele Torresin

Yan Gao

William E Martin

Andrew C Cole

Hongrae Kim

Liming Liu

Wen Ouyang

James Michael Baker

Rajib Mikail

Chenjie Lin

Cherif Ghoul

Steven Englebretson

Giulio Secondo

Zach Pan

Bahareh Anvari

Davide Leoni

Douglas Sudhoff

Phillip J Taylor, Jr

Gaurav Dave

Charles Adam Fruits

Cooling arrangements are disclosed for solid state circuit breakers. In one arrangement, a MOV is disposed between two pulsating heat pipes. An IGCT is disposed on the other side of each pulsating heat pipe away from the MOV. In another arrangement, a bus bar is integral with a heat spreader disposed between a pulsating heat pipe and an IGCT.

Cooling of power semiconductors

A rotor for a permanent magnet motor, including a rotor body having a cylindrical surface having a circumference. A plurality of magnets are disposed on the cylindrical surface at spaced intervals at the circumference, each of the magnets having a base disposed on the cylindrical surface and a top oriented radially away from the base, a sloping front side and a sloping rear side defining with the base and top an isosceles trapezoid shape in a cross sectional plane normal to an axis of rotation of the rotor, the isosceles trapezoid shape being broader at the base. A plurality of magnet retainers, each magnet retainer disposed between a neighboring pair of the plurality of magnets, include angled faces that engage respective front and rear sides of adjacent pairs of the plurality of magnets.

Rotor with surface mounted magnets

A method for manufacturing a polymeric electrical machine includes manufacturing a stator including a laminated stator core and a plurality of windings including winding overhangs; applying a surface treatment to the stator core constructed to reduce defects at an interface between a polymeric material and the stator core and enhance adherence between the polymeric material and the stator core; mounting the stator onto a mandrel; inserting the stator into an electrical machine housing mold; molding an electrical machine housing including a stator band with an integral non-drive end endplate, including overmolding the stator and winding overhangs within the stator band; molding a drive end endplate, including forming polymeric ribs in the drive end endplate and overmolding a metallic structure into the endplate, the metallic structure enhancing mechanical stiffness of the endplate; installing a rotor assembly into the electrical machine housing; and installing the endplate onto the electrical machine housing.

Manufacture of a polymeric electrical machine

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

The rotor of a rotor assembly for an electric machine includes first magnetic structures utilized for torque production in the electric machine. Second magnetic structures including second magnetic poles not utilized for torque production in the electric machine are polymer-bonded to at least one of the rotor and the rotor shaft.

Polymer-bonded position sensor for electric machine

A rotating electrical machine of the double stator configuration includes a rotor shaped as a hollow cylinder disposed concentrically between an outer stator and an inner stator. The rotor can include plurality of radially spaced magnet cavities configured to receive permanent magnetic bars. To provide sufficient stiffness and rigidity, the rotor may be made from fiber composite material. To simplify construction, the rotor can be assembled from a plurality of rotor segments radially arranged about an axis line in which the magnet cavities are disposed.

Rotor for a rotating electrical machine

A drive system is provided for propelling a ship through water. The drive system has two propellers. The propellers are coaxial so that one propeller engages the incoming water first, and the other propeller engages the water after it passes through the first propeller. The drive system has a stator that causes a first rotor to rotate. The first rotor is connected to, the first propeller to cause the first propeller to rotate. The first rotor also causes a second rotor to rotate. The second rotor is connected to the second propeller to cause the second propeller to rotate.

Dual propeller drive system for a ship

A combined electric motor and motor drive are provided. The electric motor and motor drive are attached together to form a co-packaged unit. In the co-packaged electric motor and motor drive, both the motor drive and the electric motor generate heat. A thermoelectric cooler is provided that may transfer heat away from the motor drive. The thermoelectric cooler may also insulate the motor drive from the heat generated by the motor.

Co-packaged electric motor and motor drive

An electrical machine includes a stator including a plurality of stator windings; and a rotor in magnetic cooperation with the stator. The rotor includes a plurality of cooling passages extending therethrough, each cooling passage including an inlet for receiving oil and an outlet for discharging the oil. The electrical machine includes a rotating oil distribution member coupled to the rotor, the oil distribution member including a radially inward portion and a radially outward portion, the radially outward portion being disposed adjacent to the inlets of the plurality of cooling passages. A stationary oil delivery nozzle is constructed to discharge oil toward the radially inward portion of the oil distribution member. The oil distribution member is constructed to receive the oil discharged by the oil delivery nozzle, and to direct the oil to the inlets of the cooling passages to cool the rotor.

Electrical machine with liquid cooling

A cable tie is provided with a wedge disposed within a passage extending through a head. The wedge is compressed within the passage when tension is applied to the strap. As a result, the wedge compresses the strap against an inner surface of the passage to restrain the strap.

Cable tie having a wedge locking mechanism

An electrical machine comprises a polymeric housing having a stator band, the polymeric housing formed by a polymeric material and constructed to house components of the electrical machine, structurally support the electrical machine and react torque loads generated by the electrical machine; a stator overmolded into and partially encapsulated by the stator band, the stator including a laminated stator core and a plurality of stator windings; a rotor in magnetic communication with the stator; a first endplate integral with the polymeric housing; and a second endplate, the second endplate being a polymeric endplate, the second endplate including a plurality of ribs and a metallic structure, wherein the electrical machine is constructed as an industrial electrical machine.

Polymeric industrial electrical machine

An electrical machine comprises a polymeric housing formed by a polymeric material and constructed to house components of the electrical machine, structurally support the electrical machine and react torque loads generated by the electrical machine; a stator overmolded into and partially encapsulated by the polymeric housing, the stator including a laminated stator core and a plurality of stator windings, the stator windings including a winding overhang extending from the laminated stator core; a rotor in magnetic communication with the stator; and a cooling channel disposed within the polymeric material forming the housing and encapsulated by the polymeric material and positioned adjacent to the laminated stator core, wherein the cooling channel is constructed to pass a fluid for cooling the electrical machine.

Electrical machine with cooling channel

A method of balancing a rotor and/or fixing rotor components includes arranging a plurality of generally like laminations side by side in a stack to form at least a part of a rotor. The rotor has a rotational center axis and each of the laminations having a plurality of apertures that cooperate to form passages that extend axially along a length of the stack. In accordance with an aspect of the method, a polymer based fixation material is filled in the passages in a manner to fix the laminations together in the stack. With the fixation material, a sprue is formed, projecting from an axial face of the stack. In accordance with another aspect of the method, a weight of the sprue is adjusted to rotationally balance the rotor about the rotor center axis.

Rotor balancing/fixation via injection or compression molding

An electrical machine includes a stator and a rotor in magnetic communication with the stator. The rotor has a cage construction, the rotor having a plurality of passages extending therethrough from a first end of the rotor to a second end of the rotor. A rotor cage has two end rings, one of the end rings disposed at each of the first end and the second end of the rotor, and having a plurality of conductor bars extending through the rotor from the first end to the second end and coupled with the end rings. The conductor bars each include a transition region adjacent to each end ring, and a central region disposed between the two transition regions. Each transition region includes at least one conductor bar dimension that increases proximate the end rings.

Electrical machines and methods for manufacturing electrical machines

A rotor is provided for an electric motor. The rotor shaft is located within a central opening of the rotor core. The central opening is sized larger than the rotor shaft such that a circumferential gap exists between the rotor core and the rotor shaft while the shaft is located by protrusions in the central opening of the rotor core. The circumferential gap is filled with a resin.

Growing community of inventors

Durham, NC, United States of America

Colin Tschida