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7619343 |
Rotor for an electrical motor
The invention provides a rotor for an electrical motor. The rotor comprises both a squirrel cage and a number of magnets and can be inserted e.g. in a line-start motor. To secure the magnets in...
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7294949 |
Single-phase induction motor
A single-phase induction motor comprises a stator having a stator coil; an induction cage rotor rotatably inserted into a receiving groove of the stator, having a rotation shaft at a center...
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6906448 |
Synchronous inductance motor, a manufacturing method of the synchronous inductance motor, and a compressor
A synchronous inductance motor provided in a rotor includes at least a pair of slit portions forming a two-pole magnetic polar projection having an easy-to-pass direction of the magnetic flux,...
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6897593 |
Armature for an actuator
An armature for an actuator for applying vibration to a body along an axis, the armature having at least two parallel wound helical windings on the axis, and a terminal arrangement connected to the...
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6877210 |
Electrofriction method of manufacturing squirrel cage rotors
A method of making a squirrel cage rotor of copper material for use in AC or DC motors, includes forming a core with longitudinal slots, inserting bars of conductive material in the slots, with...
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6380655 |
Variable-speed electromechanical energy converter
A variable-speed electromechanical energy converter includes a wound-type induction motor and a power rectifier connected to a secondary winding of the motor to convert AC power produced by the...
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6361291 |
Fuel delivery system
The invention relates to a fuel delivery unit, having a side channel pump that in a housing ( 13 ) has a pump chamber ( 14 ) and in the pump chamber ( 14 ) has an impeller ( 16 ), and having an...
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6278211 |
Brushless doubly-fed induction machines employing dual cage rotors
A brushless doubly-fed induction machine comprising dual cage rotors, suitable for use in generator applications requiring a fixed-frequency electrical output that is independent of a rotational...
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6246141 |
High torque reduced starting current electric motor
An AC squirrel cage motor runs with a rotor current frequency equal to the slip of the motor times its excitation frequency. It is desirable to reduce the rotor current on start up by means of an...
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5994811 |
Electric motor
An electric motor comprising two separate and coaxially spaced armatures as well as a magnet-equipped rotor arranged between the two armatures. One armature is fixed to a motor housing being a...
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5869915 |
Electric motor for an X-ray tube
An electric motor for an x-ray tube of a medical imaging system is described herein. The electric motor includes a stator and a substantially cylindrical rotor. The stator includes stator winding...
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5818141 |
Squirrel cage type electric motor rotor assembly
A squirrel cage type electric motor rotor assembly includes first and sec end plates of circular configuration, rigid tubes extending from the first plate to the second plate, the tubes being...
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5808391 |
Rotor squirrel cage construction
An induction motor includes a stator defining stator inner and outer diameters extending about a longitudinal axis, the stator includes a plurality of windings extending longitudinally and...
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5642010 |
Rotor construction for alternating current induction motor
The present invention pertains to an improved rotor bar design and method of fabrication of asynchronous motors using such rotor bars. The rotor bar design employs "T"-shaped rotor bars that are...
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5281879 |
Synchronous motor with two permanent magnet rotor portions
A synchronous motor includes a unitary rotor, a first stator, a second stator and phase-changing switches. The unitary rotor has a first rotor portion formed by a first permanent magnet and a...
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5144180 |
Two-stator induction synchronous motor
A two-stator induction synchronous motor includes a unitary rotor having a first rotor assembly and a second rotor assembly each of which is formed by a permanent magnet and a rotor core. The first...
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5001380 |
Rotor for an asynchronous motor with multiple layered screen
An asynchronous motor comprising a stator 1, a rotor including a core 2 and a multilayer screen 3. Each layer 4 of the screen 3 is made of an iron-containing alloy of high electrical conductivity,...
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4886991 |
Asynchronous motor for spinning elements
A spinning or twisting element is provided with an integral asynchronous motor having a laminate stator and a laminate rotor fixed to the shaft of the element. The individual laminates of the...
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4877984 |
Electric motor and pump mounting bracket assembly and method of making
An electric motor and pump mounting bracket assembly comprising an electric motor and a bracket fastened to the motor for supporting a pump which is driven by the shaft of the electric motor. The...
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4872256 |
Process for producing a squirrel-cage rotor
The object of the process is to obtain an intermediate short-circuiting ring in a squirrel cage rotor by filling. It makes use of the technique consisting in automatically cutting out and...
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4716329 |
Armature construction for eliminating armature reaction in electric rotating machines
To eliminate armature or rotor reaction or leakage flux (leakage reactance) in an electric rotating machine, a short-circuit coil winding is wound on and through the rotor or an armature core of...
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4692647 |
Rotor construction in an induction motor for eliminating rotor reaction
To eliminate rotor reaction in an induction motor, double ring coils are wound on and through the rotor core in addition to the main coils at right angles to the main coil plane. By placement of a...
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4488077 |
Asynchronous machine with starting disc
An asynchronous electric machine, having an iron core mounted on a shaft, squirrel bars and a short circuit ring connecting the bars at both ends of the rotor, and a stator having a coil winding...
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4453101 |
Amortisseur bar with improved interface between free conductor bars and amortisseur ring
An end portion of a free conductor bar of a pole-face winding for the rotor of a large dynamoelectric machine includes a flat at its radially outermost extremity. The end fits loosely within an...
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4381482 |
Single-phase, reversible induction motor
A single-phase, reversible induction motor, comprising two cylindrical rotors disposed side by side on the same axis of rotation, the rotors being composed of laminated iron cores and provided with...
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4371802 |
Half-pitch capacitor induction motor
A balanced, half-pitch capacitor induction motor having a stator core member with equally spaced teeth equal in number to twice the number of motor poles and with the inner ends of the teeth having...
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4211946 |
Asynchronous electric machine
In an asynchronous machine including a rotor of solid iron and a squirrel cage winding, the rotor is further provided with closed slots of any cross sectional shape which receive the bars of the...
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4139790 |
Direct axis aiding permanent magnets for a laminated synchronous motor rotor
A permanent magnet rotor for a permanent magnet synchronous-run induction-state motor is disclosed. The rotor has Rare Earth magnets disposed in apertures in unitary laminations and parallel to a...
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3996486 |
Synchronous machine with a rated power of at least 1 MVA
An asynchronous machine with a rated power of at least 1 MVA has a laminated stator core which supports a multiphase AC winding and a rotor surrounded by the stator core and having a length...
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3965380 |
Sliding armature braking motor
An arrangement for increasing the axial displacement force in a sliding armature braking motor in which an intermediate short circuit ring displaced from the end of the stack of rotor laminations...
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3902087 |
Rotor for squirrel-cage induction motor
A rotor for a squirrel-cage induction motor in which a thermosetting resin consisting essentially of a polyfunctional epoxy compound and a polyfunctional isocyanate compound and containing a...
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3877629 |
High speed rotor for friction welding systems
A high speed induction motor having a motor provided with a tension rod through the center of the laminations and end supports. Said tension rod being under unusually high tensile force to cause...
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3783317 |
DYNAMOELECTRIC MACHINE ROTOR
A squirrel-cage rotor for an electric motor is provided with a lamination stack having the usual integrally cast windings and conductively connected opposed end rings, and cold strength bars are...
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3671789 |
SYNCHRONOUS RELUCTANCE MOTORS HAVING ROTOR SEGMENTS OF EXTENDED POLE SPAN
In reluctance motors having rotors with segmentally disposed, axially extended, radially laminated stacks of steel strips carried on a conducting core, improved synchronous performance and...
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3509397 |
MULTISEGMENTED SQUIRREL CAGE ROTOR BARS SHAPED FOR IMPROVED MOTOR OPERATING CHARACTERISTICS
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3496397 |
DOUBLE CAGE ROTOR FOR A DYNAMOELECTRIC MACHINE
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3401291 |
Bar design for high torque, low slip squirrel cage rotors
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3391293 |
Induction motors
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3271647 |
Induction motor
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3254288 |
Variable speed squirrel cage induction motor
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3137800 |
Dynamoelectric machine rotor means
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3083313 |
High resistance rotor
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3045135 |
Synchronous induction motor
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3027474 |
Squirrel cage induction motor rotor
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2997610 |
Electromagnetic brake
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2971106 |
Induction motors
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2959694 |
Adjustable speed squirrel cage induction motor
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2935673 |
Alternating-current drive for ship winches and the like
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2844748 |
Synchronous motor rotor conductor bar construction
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2808552 |
Induction motor and control
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