467 results about "North pole" patented technology

A magnetic coupling having two opposed annular arrays of angularly spaced permanent magnets magnetized to create magnetic north poles and magnetic south poles alternately spaced about each array. The north-pole and south-pole magnets of each array are tapered in cross-section from their surfaces at the gap to an annular surface of the array spaced from the gap, and permanent magnet spacer magnets completely fill in the space between the north-pole and south-pole magnets from the annular surface of the array at the gap to the spaced annular surface with the spacer magnets being magnetized generally transversely to the direction of magnetization of the adjacent north-pole, south-pole magnets so that the magnetic field created by the permanent magnets extends across the gap and annularly through each array to cause one of the arrays to rotate in synchronism with the other array.

A switchable magnetic device includes a first magnet and a second magnet, both of which are essentially cylindrical. Magnets are housed in a housing made from pole pieces. Pole pieces are ferromagnetic. Lower magnet is fixedly mounted in the housing while upper magnet can rotate within the housing. Upper magnet is formed with notches or grooves along its vertical side walls. These notches or grooves receive downwardly depending arms of bar. Bar is received inside a groove formed on boss. Boss is connected to a short bar that, in turn, is fixedly connected to a handle or lever. By this means, rotation of handle or lever causes rotation of second magnet. When the upper magnet is positioned such that its north pole substantially overlies the south pole of lower magnet and the south pole of upper magnet substantially overlies the north pole of lower magnet, the first and second magnets act as an internal active magnetic shunt and as a result the external magnetic field strength from the device is quite low. Rotating the upper magnet 180° about its axis of rotation brings the magnets into alignment such that the respective north and south poles of the upper magnet substantially overlie respective north and south poles of lower magnet. In this alignment, the external magnet field from the device is quite strong and the device can be affixed to surfaces or objects.

In a rotor for a rotary electric machine, a predetermined number of main pole magnets and a predetermined number of yoke magnets are fixed in contact with a hub. Each main pole magnet is magnetized so that its radial inside portion and its radial outside portion have the opposite polarity from each other, of north pole and south pole. Also, each main pole magnet has its radial inside and radial outside polarities reversed from its closest main pole magnets. The yoke magnets are disposed to allow magnetic flux to flow through circumferential surfaces of the main pole magnets. The hub is provided as a heat radiating member and made of metal having high heat conductivity. The hub includes an inner cylindrical portion and an outer cylindrical portion, and forms an air passage spaces.

The present invention provides a piezoelectric transducer that includes at least two poled piezoelectric regions disposed in a side-by-side arrangement and connected in series with the poling directions reversed through the series connection, meaning that the “north pole” of one region is connected to the “south pole” of an adjacent region. The at least two regions can be within the same piece of piezoelectric material, or can be separate pieces of piezoelectric material. Transducers of the present invention may be particularly suited to detecting vibrations such as bending waves in a plate. For example, transducers of the present invention may be affixed to a surface of a plate and used to detect vibrations caused by or affected by touches to the plate to determine information related to the touches, such a touch position.

A linear electrical machine may function as an alternator or a motor. Three annular magnets may be provided that move relative to a core. The magnets may all have a different magnetic orientation. Two magnets may have a north pole oriented in a direction parallel to an axis along which the magnets move relative to the core. Another magnet may have a north pole oriented in a direction perpendicular to the axis.

A bicycle headlamp including: a rotor having a plurality of magnet plates attached to spokes of a bicycle wheel, each magnet plate including a plurality of magnets disposed at regular circumferential spacings with alternating south and north poles; and a stator including a power-generating coil disposed in a fixed position to face the magnetic pole faces of the magnet plates. A case includes at least a headlamp electrical circuit for establishing resonance with a certain relative speed of the magnets by means of the power-generating coil and a capacitor connected in series, and for rectifying, smoothing out, and outputting electric power obtained from the power-generating coil. Also included are a light-emitting diode and a condenser lens for focusing light emitted from the light emitting diode in front of the bicycle and for illuminating the roadway.

An electrical generator includes a coil, a coil seat and a set of permanent magnets. The coil and the set of permanent magnets are separated from each other. The coil is mounted in the coil seat so that either the coil or the set of permanent magnets can rotate relative to the other. The set of permanent magnets has multiple north poles and south poles arranged alternately. The set of permanent magnets is adjustably positioned relative to the coil seat. The set of permanent magnets is maintained a distance from the coil seat and induces a voltage in the coil in the coil seat when the set of permanent magnets rotates relative to the coil.

A linear electrical machine may function as an alternator or a motor. Three annular magnets may be provided that move relative to a core. The magnets may all have a different magnetic orientation. Two magnets may have a north pole oriented in a direction parallel to an axis along which the magnets move relative to the core. Another magnet may have a north pole oriented in a direction perpendicular to the axis. The core may include a plurality of ferromagnetic core elements; and a support structure composed of a composite material defining plural spaces, each for receiving one of the plurality of core elements. The core may further include a core shield disposed on the support structure substantially following a perimeter of the support structure defining an opening through which a reciprocating element can pass. Furthermore, the magnets may be supported in a reciprocating element having a low reluctance ferromagnetic frame there being a clearance gap between the machine core and the reciprocating element, the frame having a thicker section adjacent the gap, so as to desirably increase magnet flux linkage with an armature coil.

A magnetic multi-layer insulation system for a cryogenic storage tank. The system includes multiple layers of insulation comprising a carrier support structure disposed between a first major surface of a magnetic material defining a north pole facing away from the carrier support structure, and a second and opposite major surface of a magnetic material defining a south pole facing away from the carrier support structure. A reflective surface, or metal foil, is disposed adjacent the magnetic poles to deflect radiation. The layers are repelled from one another without the use of spacers. In various embodiments, the magnetic material is a permanent magnet selected from the group consisting of Samarium-Cobalt, Alnico, Neodymium-Iron-Boron, an alloy of the Lanthanide group of elements, and mixtures and alloys thereof.

A display assembly for automatically orienting a display item includes a base and a mounting member for mounting thereon the display item. The mounting member is removably mounted on the base to allow handling of the display item when removed and when mounted automatically moves from an unaligned orientation to an aligned display orientation. One alignment mechanism is magnetically operable and preferably includes first and second magnets respectively mounted on the base and mounting member wherein north and south poles of the first magnet align respectively with south and north poles of the second magnet to align the mounting member in the display orientation. Another alignment mechanism includes at least one camming surface for facilitating alignment of the mounting member and preferably camming surfaces respectively on the base and the mounting member which engage one another to facilitate to alignment.

The present invention provides a plasma processing device and a plasma processing method that can easily adjust plasma density distribution while making the plasma density uniform, and a method of manufacturing an element including a substrate to be processed. In an embodiment of the present invention, the inside of a vacuum vessel (1) is divided by a grid (4) having communication holes into a plasma generation chamber (2) and a plasma processing chamber (5). On the upper wall (26) of the plasma generation chamber (2), magnetic coils (12) are arranged such that magnetic field lines within the vacuum vessel (1) point from the center of the vacuum vessel (1) to a side wall (27), and, outside the side wall (27) of the plasma generation chamber (2), ring-shaped permanent magnets (13) are arranged such that a polarity pointing to the inside of the vacuum vessel (1) is a north pole and a polarity pointing to the outside of the vacuum vessel (1) is a south pole.

The object of the present invention is to increase thrust generation of a linear motor, and to achieve miniaturization and the low price of a linear motor by improving a magnetic circuit. In order to achieve the object, the present invention provides a linear motor including a magnetic yoke for the north pole 8 which is commonly connected to the magnetic pole N of permanent magnets 4, a magnetic yoke for the south pole 9 which is commonly connected to the pole S of permanent magnets 4, a magnetic north pole 5 forming a part of magnetic yoke for the north pole 8 and being mounted on the surface of a slider 3, a magnetic south pole 6 forming a part of magnetic yoke for the south pole 9 and being mounted on the surface of a slider 3 so as to be alternately located in a traverse direction of the slider 3 with the magnetic north pole 5.

The present invention relates to an electric machine (1) that includes a stator (10) and a rotor (20), with the said stator (10) being equipped with at least one annular exciter unit (11) that includes a coil (12) and at least two annular yokes (13a, 13b), with the said rotor being equipped with a structure (21) and at least one annular receiver unit (22). Each receiver unit (22) includes at least two rows (24) of magnets (23). Two sides (131, 132) of each yoke (13) include teeth (14) distributed angularly in a regular manner, and the said teeth (14) of the two adjacent yokes (13) fit onto a face (121) of the said exciter unit (11), alternately forming north poles and south poles. Each row (24) of the said magnets (23) is positioned opposite one face (121), forming an air gap (30) with the said exciter unit (11), with the electric machine (1) thus including at least two air gaps (30), with a 3D magnetic flux thus circulating inside the said electric machine (1), dividing and regrouping itself in the vicinity of the said magnets (23) and of the said yokes (13).

In a rotor for a rotary electric machine, a predetermined number of main pole magnets and a predetermined number of yoke magnets are fixed in contact with a hub. Each main pole magnet is magnetized so that its radial inside portion and its radial outside portion have the opposite polarity from each other, of north pole and south pole. Also, each main pole magnet has its radial inside and radial outside polarities reversed from its closest main pole magnets. The yoke magnets are disposed to allow magnetic flux to flow through circumferential surfaces of the main pole magnets. The hub is provided as a heat radiating member and made of metal having high heat conductivity. The hub includes an inner cylindrical portion and an outer cylindrical portion, and forms an air passage spaces.

A permanent magnet fixed to a peripheral portion of a lens cell includes two magnets that are joined together so that the north poles face each other and the south poles are exposed. A first driving coil is arranged to face toward exits for lines of magnetic force from the joining surfaces of the north poles of the permanent magnet, and a second driving coil is arranged to face toward entrances for lines of magnetic force in the permanent magnet. The orientation of the lens is adjusted by adjusting the currents supplied to the first driving coil and second driving coil to drive the lens cell in an optical axis direction and horizontal direction in a state in which the lens cell is levitated relative to the cover.

A magnetic field sensor has a circular vertical Hall (CVH) sensing element with a plurality of vertical Hall elements disposed over a common implant region in a substrate. The plurality of vertical Hall elements is disposed in an x-y plane. The magnetic field sensor is responsive to a magnetic field generated by a multi-pole magnet having a plurality of north poles and also a plurality of south poles arranged in a plane parallel to the x-y plane, and, in some embodiments, arranged in the x-y plane. A corresponding method is also described.

A fan device includes a base plate, a flat-type impeller, an assembling member, a magnet sheet and a shaft member. The base plate includes an axial hole and at least one stator coil arranged thereon. The flat-type impeller is formed with an annular supporting plate and bent vanes while the assembling member is formed with an assembling hole and an upraised flange. The magnet sheet provides with at least one pair of alternatively opposite magnetic poles (i.e. north pole and south pole). A first distal end of the shaft member is extended through the flat-type impeller and inserted into the assembling hole of the assembling member while a second distal end of the shaft member is inserted into the axial hole of the base plate. The flat-type impeller is positioned and sandwiched in between the assembling member and the magnet sheet so as to constitute a thin-type structure.

A device for treating cells is disclosed. The device includes a plurality of permanent magnets arranged in a side-by-side relationship with the magnetic north pole and the magnetic south pole of each permanent magnet being adjacent the magnetic north pole and magnetic south pole of an adjacent permanent magnet, respectively, the plurality of permanent magnets forming a ring of permanent magnets. The device further includes an electrically conductive wire wound substantially around the ring of permanent magnets, and tubing wrapped around the ring of permanent magnets between windings of the wire. A cooling device introduces a flow of coolant through the tubing so as to substantially cool the device. The device further includes a control circuit, connected to the wire, for selectively generating a coil current for passing through the wire. The current has an AC component and a DC component. The frequency of the AC component is programmable and is set to substantially match a resonant frequency associated with the cells to be treated. The coil current creates an electromagnetic field that interacts with a magnetic field generated by the ring of permanent magnets to generate a complex field that causes ionic collisions within the cells to be treated.

A block for building a toy is provided. The block includes a body, a case provided in the body, a holder with a sliding-prevention part, provided movably and rotatably within the case, and a magnet with south and north pole faces, installed in the holder. The blocks, each with this construction, can connect to each other to build a toy, without sliding off relative to each other.

Provided is there a piece with a magnet for building a toy, and more particularly to a piece with a magnet for building a toy, the piece having at least two or more end and a magnet case having a magnet with south and north pole faces inside, rotatably provided on each end, capable of connecting to the other piece of the same construction, without sliding with respect to each other, by automatically enabling the north or south pole face of the one magnet to be opposite to the south or north pole face of the other magnet.

A magnetic actuator system which includes a case (10) and a spindle (22) which extends through the case comprising a magnetizable material such as iron. The actuator further includes a pair of permanent magnet assemblies (14, 16) positioned fixedly within the casing with a longitudinal space there between, wherein the permanent magnet assemblies comprise an alternating plurality of north pole / south magnet sections (18) which extend longitudinally or circumferentially of the actuator. The actuator further includes a coil winding (24) which surrounds the spindle, positioned between the two permanent magnet assemblies. Magnetic pole assemblies (28, 30) attached to the spindle are positioned within the volume encompassed by the permanent magnet assemblies, such that an alternating drive signal produces an oscillating action of the spindle of desired frequency and amplitude.

It is an object of the present invention to provide techniques for improving efficiency and torque of a motor while achieving thinning of the motor. In a brushless DC motor, a rotor includes a magnetic-field creating magnet and a stator includes an armature winding. The magnetic-field creating magnet and the armature winding are placed to locally face in a radial direction orthogonal to an axial direction. This reduces a thickness of the brushless DC motor which extends in the axial direction. Also, a short-circuit yoke plate for joining and magnetically short-circuiting the north pole and the south pole of a permanent magnet is placed on a negative side in the axial direction with respect to the magnetic-field creating magnet. By provision of the short-circuit yoke plate, a magnetic path on a negative side in the axial direction with respect to the magnetic-field creating magnet can be shortened. Accordingly, magnetic reluctance occurring during rotational movement of the brushless DC motor can be reduced, to thereby improve efficiency and torque of the brushless DC motor.

The present disclosure relates to a magnetising portion for providing a high-gradient magnetic field in a magnetic separation device. The magnetising portion comprises at least one magnetic assembly. The at least one magnetic assembly comprises: a plurality of magnets whereby each magnet has a north pole, south pole and a magnet axis extending between the north and south poles, and the plurality of magnets are arranged one above the other in a direction at least substantially perpendicular to the axis of each magnet in such a manner that the north and south poles of adjacent magnets are arranged alternately and a space is provide between adjacent magnets; and at least one non-magnetic spacing means arranged in the space between adjacent magnets. The present disclosure also relates to magnetic separation devices comprising at least one of the said magnetising portions and to a method of isolating magnetically labelled particles using the magnetic separation devices.

The invention concerns a transverse flux electrical machine operating with alternating current, having a first element having an alternate arrangement of excitation cores and of flux return cores and a winding of electrical conductors, the winding of electrical conductors being wound as a toroid, inside all said excitation cores; a second element having an exciter section comprising two toothed magnetic structures, each toothed magnetic structure comprising a number of slots equal in number to the total number of excitation cores and of flux return cores, the corresponding slots of each magnetic structure being toothed by being aligned; a magnetized sub-assembly is inserted inside each indentation so that an alternating arrangement of magnetic north poles and south poles is produced in each of these magnetic toothed structures of said exciter section; an air gap between the first element and the second element; at least one of the first element and of the second element being capable of rotating around a rotation axis that is common to the first element and to the second element.

The invention provides a structure of a fast recovery diode and a manufacturing method of the fast recovery diode. The structure comprises a cathode metal layer, a cathode area located on the cathode metal layer and comprising a first conduction type, a drift area located on the cathode area and having the first conduction type, an anode area located on the drift area and having a second conduction type, and an anode metal layer located on the anode area, wherein a PN (North Pole) junction is formed at an interface of the drift area and the anode area, and bonding interfaces are formed at the PN junction and / or in a drift area and / or the anode area. The bonding interfaces are introduced, thereby forming a short life area in a fast recovery diode body area, and the position of the bonding interface is precisely controlled to accurately control the life distribution of a carrier in the fast recovery diode body area, and effectively improve the switching speed of the fast recovery diode, and simultaneously ensure the switch softness.

The invention discloses a multi-directional polarized light-based real-time navigation device. The multi-directional polarized light-based real-time navigation device comprises a navigation device main body and an upper computer of a multi-directional polarized light information fusion module, wherein the navigation device main body has a polyhedral array structure; a polarized light sensor for measuring the polarization direction of incident light and a light intensity sensor for measuring the intensity of incident sunlight are arranged on each plane of the array structure; one surface of the polyhedral array structure is set to be a horizontal datum plane; an electronic compass for acquiring horizontal datum plane three-dimensional information at least comprising a pitch angle alpha, a roll angle beta and a course angle alpha magnetic north is arranged on the horizontal datum plane; the alpha magnetic north expresses an included angle between the body axis of the electronic compass and a geomagnetic north pole; the multi-directional polarized light information fusion module, an astronomical almanac query module and a geomagnetic information query module are arranged in the upper computer.

A latching relay employing a movable cantilever with a first permanent magnet and a nearby second magnet is disclosed. The permanent magnet affixed to the cantilever is permanently magnetized along its long (horizontal) axis. The cantilever has a first end associated to the first pole (e.g., north pole) of the first magnet, and a second end associated to the second pole (e.g., south pole) of the first magnet. When the first end of the cantilever approaches the second magnet, the first pole of the first magnet induces a local opposite pole (e.g., south pole) in the second magnet and causes the first end of the cantilever to be attracted to the local opposite pole of the second magnet, closing an electrical conduction path (closed state). An open state on the first end of cantilever 10 can be maintained either by the second pole of first magnet being attracted to a local opposite pole in the second magnet or by a mechanical restoring force of flexure spring which supports the cantilever. A third electromagnet (e.g., a coil or solenoid), when energized, provides a third perpendicular magnetic field about the first magnet and produces a torque on the associated cantilever to force the cantilever to switch between closed and open states. A few alternate embodiments of the relay are also disclosed which include a case where the latching feature is disabled, and another case where an external magnet is used to switch the cantilever.

The object of the present invention is to increase torque generation of a motor, to minimize a motor size, and to reduce a motor cost by improving a magnetic circuit of a rotor. In order to achieve the object and make effective use of the power of each permanent magnet within the entire motor, the present invention provides a motor comprising magnetic circuits for the pole N 5 commonly connected to the north pole of permanent magnets 7, magnetic circuits for the pole S 6 commonly connected to the south pole of permanent magnets 7. Also, the motor further comprises magnetic poles N in the shape of protruding poles of the north pole and the magnetic poles S in the shape of protruding poles of the south pole. The magnetic poles N, forming a part of the magnetic circuits for the pole N, are placed on a part around the perimeter of the rotor, and the number R of the magnetic poles N is different from the number m of stator poles. The magnetic poles S, forming a part of the magnetic circuit for the south pole, are placed on a part around the perimeter of the rotor alternately in a rotational direction of the rotor with the magnetic poles N in the shape of protruding poles of the north pole and the number of the magnetic poles S is R.