66results about How to "Small air gap" patented technology

A plastic discharge tube extends through a swaged cap bore through a metal swaged cap. A conical cap portion of the metal swaged cap is pressed into a retainer ring passage through a metal retainer ring. A swage surface in the retainer ring passage swages the conical portion of the metal swaged cap thereby fixing the position of the plastic discharge tube in the swaged cap bore and locking the swaged cap in the retainer ring passage. The plastic discharge tube is inserted into a steel injection tube fixed to a soil cutting knife. A ring bottom positioning surface contacts and injection tube upper end of the injection tube. A delivery hose is telescopically received on a plastic discharge tube retainer assembly and the steel injection tube. Hose clamps clamp the delivery hose to the retainer assembly and the injection tube.

The application relates to a DC to DC converter and control method thereof. The DC to DC converter includes a first converter circuit, a second converter circuit, a transformer having a primary winding and a secondary winding, a first resonant tank having a first capacitive element and a first inductive element, and a second resonant tank having a second capacitive element and a second inductive element. The first capacitive element and the first inductive element are coupled between the first converter circuit and the primary winding of the transformer; the second capacitive element and the second inductive element are coupled between the second converter circuit and the secondary winding of the transformer. During power transfer from the second converter circuit to the first converter circuit, a first plurality of first power-semiconductor-devices of the first converter circuit are operable to charge the first capacitive element during a first half cycle of a switching period; and a second plurality of the first power-semiconductor-devices of the first converter circuit are operable to provide an output voltage comprising an voltage across the primary winding of the transformer and the voltage of the first capacitive element superimposed thereon. This provides step-up gain for the backward direction, the first converter circuit operating in double voltage rectification manner and the second converter circuit working in the conventional full-bridge modulation with switching frequency fixed substantially at the resonant frequency.

A modular compressor assembly comprises a common motor assembly, an impeller, a blower housing and an engagement mechanism. The common motor assembly includes a stator housing containing a stator assembly and having a rotor magnet rotatably disposed therewithin. The impeller is mounted to and rotatable with the rotor magnet. The blower housing is selectable from among a plurality of blower housings each having a different cross-sectional geometry. The engagement mechanism is formed on the stator housing and/or the blower housing and allows interchangeable mounting of different blower housing configurations to the common motor assembly in order to achieve varying flow characteristics of the compressor assembly.

An electric vehicle and a range extender engine are shown including the controls to operate the same.

A Gamma Detector (25) comprises a scintillation crystal block (26) and a set of Geigermode Avalanche Photodiode (G-APD) sensor elements (11) optically coupled to at least a first surface (27) of the scintillation crystal block (26). The G-APD sensor elements (11) are arranged in at least one elongate strip (10) of G-APD sensor elements (11), said G-APD strip (10) coupled to a readout circuit at one, preferably at both of its ends (FIG. 2).

An arrangement with a conductor (15) intended to be on a high potential and a part (12) connected to ground and separated therefrom by at least a voltage receiving air gap (16, 17), comprising an insulating envelope (18) surrounding said conductor and at least a first member (9) of electrical insulating material arranged to screen off said ground part from said conductor. Said air gap is dimensioned to get such a high electrical field strength by possible sudden, strong voltage raises of said conductor, that air molecules in said air gap will be ionized. Said insulating envelope (18) and the insulating member (9) have surfaces arranged to receive electrical charges generated through said ionizing for creating a voltage over their thicknesses and decreasing the voltage drop in the air gap between the conductor (15) and the ground part (12).

An ignition apparatus includes a cylindrical core made from magnetically-permeable material and a C-shaped magnetic return path structure that is made from a stack of silicon steel laminations. A tightly controlled air gap is provided between one leg of the C-shaped structure and an end face of the core, forming a magnetic circuit having a high magnetic permeability, which overall reduces the number of primary winding turns needed, thereby reducing the amount of copper wire. In addition, the circular cross-section of the core reduces the mean length per turn (MLT) of the primary winding because the primary winding can be wound directly on the core, which in turn also reduces the MLT of the secondary winding. The reduced MLT also reduces the amount of copper wire. The structure may be replaced using a magnetically-permeable, U-shaped shield.

An axle drive system includes a first dynamoelectric drive motor having a first rotor shaft radially mounted on a housing at two bearing points; a superimposing transmission and a power divider having a first power divider shaft driving a first output shaft, and having a second power divider shaft driving a second output shaft; the power divider shafts, the output shafts and the first rotor shaft rotationally mounted about a common axis of rotation oriented transversely to the direction of travel. A transmission input shaft is connected to the first rotor shaft for co-rotation therewith; at one end facing the first rotor shaft, the transmission input shaft is radially mounted on the housing at a further bearing point; the first rotor shaft and the transmission input shaft are intercoupled axially displaceably; the first and the second output shafts are each mounted relative to the housing by a radial bearing and relative to each other by another radial bearing.

A compressor that includes a rotor assembly, a stator assembly and a heat sink assembly. The rotor assembly includes a shaft to which a bearing assembly and a rotor core are secured. The heat sink assembly is then secured to the bearing assembly and to the stator assembly.

The electro drive comprises a stator, a rotor, and a rotor bearing which is axially arranged within the axial length of the rotor.

The invention relates to an actuator for actuating a valve installed in a hydraulic or compressed air system comprising a coil support which can be displaced by means of air space induction in a magnetically conducting housing on a magnetic cylinder composed of a permanent magnet and a cylinder pole disk. The invention is characterized in that the dimensions of the permanent magnet and the pole disk correspond to each other in such a way that the diameter of the front surface of the permanent magnet is at least the same size as the circumferential surface of a neighboring pole disk and that the width of the coil associated with the pole disk exceeds the width of the pole disk by the lift amplitude of the coil support. According to the invention, the actuator for actuating a valve used in fluidic engineering is disposed in such a way that the coil support is displaceable in a fluidic medium and the air gap arranged between the coil support and a magnetic cylinder pipe surrounding the permanent magnet and the associated pole disk has a maximum width whereby a laminated lubricating film is formed without displacing the surrounding fluid.

The present invention is an electrical machine comprising a rotor (10) and a stator (12) having radial passages (28) arranged circumferentially along the stator, magnetic-flux generators (34) housed in the passages, and a stator bearing (24) containing the rotor. According to the invention, the radial passages (28) comprise fluid-circulation galleries (36) facing the magnetic-flux generators (34).

An electric vehicle and a range extender engine are shown including the controls to operate the same.

An electric vehicle and a range extender engine are shown including the controls to operate the same.

A linear electromagnetic machine is described which comprises first and second substantially cylindrical parts arranged to move relative to each other along a common axis of motion. The first cylindrical part produces a spatially periodic radial magnetic field across an air gap, the magnetic field having a regular alternating polarity along or parallel to the axis of motion. The second cylindrical part comprises a plurality of laminar electrical conductors wrapped into cylindrical form and placed in the air gap to intercept the magnetic field, each of the laminar electrical conductors compromising a regular pattern of electrically conductive paths, the electrically conductive paths of the plurality of laminar electrical conductors being interdigitated together within the air gap. The use of a plurality of laminar electrical conductors having respective electrically conductive paths which are interdigitated (nested) within the air gap provides for a very thin planar structure which enables the air gap to be made small, thereby improving the efficiency of the electromagnetic machine. In more general terms, improvements relating to the design of low-cost cylindrical or elliptical linear electromagnetic machines are described, in which a conventional assembly of wire coils is replaced by a small number of interdigitated metal laminations.

A jacketed magnetic bearing for a rotary machine having a rotor. The jacketed magnetic bearing comprises a stator magnetic circuit secured to a stationary support device, the stator magnetic circuit comprising at least one coil and a ferromagnetic body placed in a metallic protective enclosure. Said protective enclosure comprises an annular support and an annular jacket, the annular support and the annular jacket being welded together. The annular jacket comprises magnetic material and is coated by a protective layer.

The invention discloses an inversion inductor, which comprises a magnetic core, and a coil and a coil leading-out terminal wound on the magnetic core, wherein the magnetic core comprises a plate-shaped magnetic core A, a plate-shaped magnetic core B, a column-shaped magnetic core A, and a column-shaped magnetic core B; the plate-shaped magnetic core A and the plate-shaped magnetic core B are arranged in a relatively spacing manner, the column-shaped magnetic core A and the column-shaped magnetic core B are vertically arranged between the plate-shaped magnetic core A and the plate-shaped magnetic core B in a spacing manner, and both ends of the column-shaped magnetic core A and both ends of the column-shaped magnetic core B are respectively in abutment joint with the opposite surfaces of the plate-shaped magnetic core A and the plate-shaped magnetic core B, so that the plate-shaped magnetic core A, the plate-shaped magnetic core B, the column-shaped magnetic core A, and the column-shaped magnetic core B are connected into an integral whole; and the coil is wound on the column-shaped magnetic core A and the column-shaped magnetic core B respectively. By using the inversion inductor disclosed by the invention, the quality factor of the inversion inductor is improved, the material cost of the magnetic core is greatly reduced, noise and heat generation are decreased, and at the same time, the operation of assembly is greatly simplified, thereby being beneficial to improving the production efficiency of the inversion inductor.

An electric motor (1), comprising a primary part (2a, 2b) having an iron-free winding device (3) that comprises at least two phases (6), wherein one phase (6) comprises at least two phase windings (4) and at least one electrical connecting element (5), a secondary part (7a, 7b) having an even number of magnetic poles (8), which are arranged alternatively on the secondary part (7a, 7b), wherein the winding device (3) is arranged in an air gap (9) between the primary part (2a, 2b) and the secondary part (7a, 7b) relative to an axis (10a, 10b), in such a manner that each phase winding (4) of a phase (6) is arranged opposite a respective magnetic pole (8) and all magnetic poles (8) are usable simultaneously for force formation.

A magnetic bearing comprising a stator magnetic circuit secured to a stationary support device, the stator magnetic circuit comprising at least one coil and a ferromagnetic body placed in a protective annular support, the protective annular support leaving uncovered a surface of the ferromagnetic body and a surface of the at least one coil. The bearing also comprises at least one annular plug placed on the surface of the at least one coil which is left uncovered by the protective annular support, and the annular plug and the surface of the ferromagnetic body which is left uncovered by the protective annular support are coated by a protective layer.