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WO/1994/022204A1 |
This invention relates to high-density discoidal brushless induction open frame motors and generators with multistacking, multiphasing and multistaging capability. These motors may be in the range from 10 hp to 25,000 hp or more and thes...
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WO/1994/019857A1 |
This method is for manufacturing the cage rotor of an induction motor comprising a plurality of secondary conductors arranged in a plurality of through holes (16) of a laminated core (14), and a pair of end rings for connecting the secon...
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WO/1994/019858A1 |
A cage rotor (10) includes a plurality of slots (16) for accommodating secondary conductors (18) along the periphery of a laminated core (14) fixed to a rotor shaft (12). The slots (16) pass through the core (14) in parallel with the rot...
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WO/1994/017581A1 |
A support member (22) capable of holding a laminated core member having a predetermined axial length with opposite axial end faces of the core member held down is used to hold a small size laminated core member (24) having a smaller axia...
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WO/1994/017301A2 |
An electric motor has a multislotted rotor (16) and a multipole stator accommodated in a housing (12). The stator poles (14) extend in the direction of the rotor axis (6) whereas the rotor slots (22) are inclined with respect to the roto...
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WO/1994/013054A1 |
In the squirrel-cage rotor proposed, the theoretically ideal groove cross-section (3) is divided radially into four zones (5) which are displaced relative to each other alternatively in and against the direction of rotation of the rotor....
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WO/1994/007298A1 |
A cage rotor (10) comprises a laminated core (14) fixed to a rotor shaft (12); a secondary conductor (18) arranged in a plurality of through holes (16) made through the laminated core (14); a pair of end rings (20) connected to the secon...
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WO/1994/005072A1 |
A fixed coil (electromagnet) and a rotary coil are caused to pass by each other to establish an electromagnetic induction phenomenon. The two coils repel each other, the repulsive force generated in the rotating coil is absorbed by the c...
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WO/1994/002983A1 |
A method for brazing end rings (20) to rotor bars (12) for a squirrel cage rotor assembly (10) comprises assembling the rotor (10) in a brazing fixture (22) with a braze shim (16) between the rotor bars (12) and the end rings (20); prehe...
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WO/1994/001918A1 |
The invention concerns a squirrel-cage rotor for an electrical motor, with a cage of electrically well conducting rods which pass longitudinally through the bundle of laminae, the ends of the rods projecting from the lamina bundle being ...
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WO/1994/001917A1 |
An electric motor-wheel including a hollow shaft with a first opening at a first end thereof and a second opening at a second end thereof, wherein said first opening receives conductors from outside the motor-wheel; a stator coaxial with...
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WO/1994/000904A1 |
A high-output induction motor having its stator and rotor elongated without affecting grinding and die-casting while maintaining the flexural rigidity of the articles. The induction motor (10) includes two rotor cores (14) fixed to a spi...
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WO/1993/024985A1 |
The rotational electric motor (6) described has, located in a housing (2, 4), a stationary internal stator (10) and a bell-shaped external rotor (8). Located in the space (3) between the rotor (8) and the housing (4) is a certain quantit...
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WO/1993/018569A1 |
The present invention refers to 'Differential Integral Electrical Machine', whose reliability, technology for manufacture and price is comparable with the conventional induction machines. The differential integral generator is generating...
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WO/1993/009588A1 |
A system for supporting conductors (30) in a dynamoelectric machine (2) having a stator assembly (4) with a plurality of stationary armature elements (26) spaced about a circumference positioned radially about a central longitudinal axis...
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WO/1993/005563A1 |
The invention relates to a rotor for an electric machine, particularly to a rotor for a hermetic refrigerating compressor. The rotor core (1) contains a number of axial slots (4, 5), containing the electric conductors of the rotor, which...
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WO/1993/000735A1 |
A rotor (14) having a structure wherein a plurality of through holes (22) are provided in the peripheral part of a laminated iron core (20), and conductive rods (24) formed of aluminum rods are forced into the through holes (22), and con...
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WO/1993/000736A1 |
The invention relates to electrical engineering, namely to electric machines, ensures in an asynchronous machine any given ratio of the rotation frequency to the voltage frequency and may be used in high-speed electric drives and electri...
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WO/1992/020142A1 |
The aim of the invention is to obtain a process for operating a permanently excited single-phase alternating current machine which allows optimal exploitation of the machine and economical design of the converter. The process of the inve...
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WO/1992/017933A1 |
In the manufacture of rotors, for each rotor slot two openings (5, 7) are punched into the circular rotor plates that form the rotor pack. The contour on the first opening (5) includes a concavity (6) which is directed towards the periph...
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WO/1992/016993A1 |
A controlled motor (1) with a control system (3) which, with a processor stage and power control components (11), generates the driving current for the motor windings depending on at least one of the external command signals transmitted ...
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WO/1992/011963A1 |
A device for driving the main shaft of a machine tool, in which the dimension of the device is small, occurrence of vibrations and noises can be controlled and a region of operation from rotation at low speed to rotation at high speed is...
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WO/1991/015050A1 |
The short-circuiting and brush-raising device (13) described includes a rotatable actuating ring (14) with brush-actuating rods (28) which, via levers (31), cause the brushes (15) to be raised after the slip rings (3, 3a) have been short...
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WO/1991/012647A1 |
An asynchronous generator with constant output voltage can be implemented as a one-phase, two-phase or three-phase generator. Slot bridges (HH) made of plates are arranged with a minimum air gap (LR) in the slots of the stator, next to t...
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WO/1991/011052A1 |
A motor controller (10) for a single or multiphase induction motor (51) with control loop (59a, 59b, 59c) including auxiliary winding (61), capacitor (63) and saturable reactor (65). Auxiliary winding (61) is electro-magnetically coupled...
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WO/1991/007005A1 |
A multiple-stator synchronous induction motor which is started as an ordinary induction motor and then switched into synchronous operation when the rotational speed becomes close to the synchronous speed. The motor includes a plurality o...
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WO/1991/007004A1 |
An induction motor of the outer rotor-type in which rotor windings are arranged on the outer side of the stator winding. When applied to industrial machinery and traffic systems, the output of the motor can be transmitted to the machine ...
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WO/1991/006147A1 |
The present invention relates to electric motors of the brushless direct current motor type. The motor is comprised of two coaxial stators (5, 5') with a common magnetic circuit (6) and two concentric rotors (4, 4') mounted on a driving ...
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WO/1991/001062A1 |
A method of and a device for controlling an induction motor for a compressor coupled to the motor through a revolving shaft and having a compressing element driven by said revolving shaft contained in one hermetically sealed vessel, in w...
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WO/1990/016107A1 |
The invention relates to a monophase electromagnetic actuator which includes a rotor (1) with a cylindrical magnetized section (5) divided into two N poles transversely mangetized in alternate directions. The actuator also includes a sta...
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WO/1990/010971A1 |
An electromagnetic induction machine having inductively coupled primary, secondary and tertiary branch windings. The exciting current of the primary branch is transformed or reflected, via the inductive coupling to an electrically separa...
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WO/1990/008419A1 |
A terminal box made of plastic of this invention incorporates an electromagnetic contactor which is used for switching the delta connection of the field coils in a three-phase induction motor (M) to the star connection and vice versa. In...
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WO/1990/006617A1 |
An AC spindle motor (10) used for driving the spindle of a machine tool has a rotor (14) with an output shaft (12) that can be coupled to the spindle, and a stator (16) arranged to surround the rotor (14), the stator (16) having a lamina...
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WO/1990/006013A1 |
Slotted conductors (1e) and end rings (1d) of a cage rotor core (1) are formed by filling a rotor core shell with molten aluminum at a flow rate not more than 1.5 m/sec, and then solidifying the filled aluminum under a high pressure of n...
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WO/1990/004281A1 |
In a rotor for a squirrel-cage induction motor for frequency convertor operation each rotor slot has a main portion (21) in which the rotor conductor is arranged and a slot opening (22) arranged between the main portion and that surface ...
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WO/1990/004280A1 |
A squirrel-cage induction motor for frequency convertor operation has a rotor with a plurality of axially extending rotor slots (41) with rotor conductors (4). Those parts (413) of the rotor slots which are facing the rotor surface (11) ...
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WO/1990/001825A1 |
This invention relates to a structure for fixing a rotor (12), in which rotor cores (16) and magnets (14) are arranged alternately in the circumferential direction, of a synchronous motor to an output shaft (10). A molding resin (24) is ...
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WO/1989/012347A1 |
An electric motor with iron-cored disk armature consists of at least three armatures. The central disk (1) is made of dynamo sheet by reeling-up. The coils (2) consist of wires that are situated on the lateral surfaces or in slots of the...
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WO/1989/011177A1 |
A single-phase induction motor comprises a single-strand stator winding and a multiple-strand rotor winding. Each rotor winding strand is self-contained and is subdivised into a rotation winding (3) and a control winding (4). The control...
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WO/1989/005539A1 |
In driving motors for continuous and positioning operation, two different types of rotor, corresponding to the type of operation, are controlled by two different stators. The driving motor (1) according to the invention is of simple desi...
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WO/1989/005054A1 |
This invention relates to a rotor for a high speed induction motor wherein an end ring (24) made of aluminum is cast by die casting on the outside of each of both ends of a laminated rotor core (23). As an iron cover for the aluminum end...
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WO/1988/010021A1 |
An asynchronous motor comprises a stator (1) and a rotor (2) consisting of a core (2) and a multilayer screen (3). Each layer (4) of the screen (3) is made of an iron-containing alloy with a high electric conductivity, the value of the l...
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WO/1988/008636A1 |
The invention provides an electrical machine having a rotor (5) rotatable on a shaft (4) between two stators (21). The stator can be energized by A.C. passed through coils (24) so that the machine will act as a motor and by D.C. passed t...
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WO/1988/006107A1 |
An electric braking and auxiliary acceleration apparatus for an automotive vehicle including a rotary machine coupled to the main shaft of an internal combustion engine that drives the axle of the vehicle. The rotary machine consists of ...
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WO/1988/002569A1 |
In order to improve the efficiency of electric machines, by reducing losses caused by eddy currents induced by high frequency fluxes, the outer surface (12) of the rotor (10), including the rotor pole face, has a plurality of circumferen...
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WO/1988/001803A1 |
An induction motor includes a stator (ST1) having at least one pair of stator windings (WA, WB) and a rotor (RO1) with rotor windings (WC) which are magnetically coupled to the stator windings (WA, WB) via a circumferential air gap (AG)....
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WO/1988/000407A1 |
A structure of a squirrel-cage rotor used for high-output induction motors, wherein slots of the squirrel-cage rotor are constituted by a suitable combination of open slots and closed slots, so that good electric conductors (16) in the s...
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WO/1987/006779A1 |
A rotary electric machine in which heat is generated due to electrical eddy currents when mechanically driven. The machine includes a rotor (3) of which the magnetic reluctance and electrical resistance are low. It lies between two stato...
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WO/1987/005754A1 |
A brushless electric motor, in particular a servomotor for direct drive, is usually provided with a hollow cylindrical stator (26) with a multiphase stator winding (28) and a rotor (23) rotatably arranged in the stator (26) leaving an ai...
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WO/1987/001052A1 |
A fluid stirrer in which a power unit and a bearing unit are provided in a sealed space, to agitate the fluid in the space without permitting it to leak out of the equipment. When an electric motor is used as a power unit, only the stato...
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