140results about How to "Improve magnetic efficiency" patented technology

In an electromagnetic switching device including a cylindrical part made of a magnetic material with a closed bottom for housing a movable iron core having a movable contact and so constructed as to render the movable contact movable toward and away from a fixed contact, a joint member made of a metallic material with an insertion hole formed substantially in the center thereof for movably receiving a movable shaft fixedly attached to the movable iron core, and a metal plate made of a non-magnetic material with a hole formed substantially in the center thereof with the inner diameter substantially the same as the inner diameter of the cylindrical part, the cylindrical part and the joint member are air-tightly jointed to each other with the metal plate provided therebetween, and the movable iron core is housed in the cylindrical part with a clearance defined between the movable iron core and the joint member corresponding to a required stroke within which the movable contact contacts the fixed contact. This arrangement provides improvement in magnetic efficiency of electromagnet of the device. Accordingly, improved energy saving performance is accomplished as compared with a case of a conventional electromagnetic switching device.

Method and device for self-regulated flux transfer from a source of magnetic energy into one or more ferromagnetic work pieces, wherein a plurality of magnets, each having at least one N-S pole pair defining a magnetization axis, are disposed in a medium having a first relative permeability, the magnets being arranged in an array in which gaps of predetermined distance are maintained between neighboring magnets in the array and in which the magnetization axes of the magnets are oriented such that immediately neighboring magnets face one another with opposite polarities, such arrangement representing a magnetic tank circuit in which internal flux paths through the medium exist between neighboring magnets and magnetic flux access portals are defined between oppositely polarized pole pieces of such neighboring magnets, and wherein at least one working circuit is created which has a reluctance that is lower than that of the magnetic tank circuit by bringing one or more of the magnetic flux access portals into close vicinity to or contact with a surface of a ferromagnetic body having a second relative permeability that is higher than the first relative permeability, whereby a limit of effective flux transfer from the magnetic tank circuit into the working circuit will be reached when the work piece approaches magnetic saturation and the reluctance of the work circuit substantially equals the reluctance of the tank circuit.

A magnetic field generator (10) which generates a high uniformity magnetic field at a plurality of locations is provided. The magnetic field generator (10) includes a pair of plate yokes (12a),(12b) which are faced to each other with a gap (G) in between. A pair of mutually opposed magnetic poles (14a),(14b), and another pair of mutually opposed magnetic poles (16a),(16b) are provided between the plate yokes (12a),(12b). The magnetic poles (14a),(14b) respectively include permanent magnet groups (18a),(18b) which are disposed on mutually opposed surfaces of the plate yokes (12a),(12b). Pole pieces (20a),(20b) are fixed to mutually opposed surfaces respectively of the permanent magnet groups (18a),(18b). The magnetic poles (16a),(16b) respectively include permanent magnet groups (22a),(22b) which are disposed on mutually opposed surfaces of the plate yokes (12a),(12b). Pole pieces (24a),(24b) are fixed to mutually opposed surfaces respectively of the permanent magnet groups (22a),(22b). Magnetic field uniformity spaces (F1),(F2) are formed between the pole pieces (20a),(20b) and between the pole pieces (24a),(24b) respectively.

In a variable damper using magneto-rheological fluid that comprises a cylinder (12) filled with the fluid, a piston (16) slidably received in the cylinder and including an inner yoke (32; 62; 126), an outer yoke (31; 64, 65; 140) and a coil (34; 130), a piston rod (13) having an inner end attached to the piston and an outer end extending out of the cylinder and a magnetic valve formed in a gap between the inner and outer yokes, at least one of the outer yoke and inner yoke consisting of at least two parts that are joined to each other in an axial direction. The two piece arrangement of the inner yoke or outer yoke allows the end plates to be omitted because the gap spacer can be installed without requiring end plates, and this contributes to a compact design and a favorable damping property. Also, the manufacturing and servicing of the damper can be simplified. When end plates (134) are used, the freedom in the positioning of the coil is increased.

Methods and devices producing time varying magnetic field treats a patient. The device contains a coil made of insulated wires, an energy storage device, an energy source and a switch. The coil is flexibly attached in a case. The device has at least one blower for cooling the coil. The methods and devices can be used in for example in physiotherapy, neuropsychiatric therapy, aesthetic therapy, urology or urogynecology.

A drive mechanism @is comprised with a set comprising a plurality of magnetic bodies, means for supplying a frequency signal to said set, and means for producing movement caused by the attraction / repulsion between the magnetic bodies. The movement is the driving source of the drive mechanism.

A linear motor includes a slider unit having a magnet row in which plural permanent magnets are arranged in series so that the same poles are opposed to each other, a stator unit including electromagnetic coils for plural phases arranged along a movement direction of the slider unit, and plural magnetic detector devices, wherein the plural magnetic detector devices are provided in response to the phases of the electromagnetic coils for plural phases and detect magnetic flux radially extending in a direction perpendicular to the arrangement direction of the permanent magnets at boundaries between the permanent magnets of the magnet row and output signal waveforms for plural phases at phases equal to phases of waveforms of back electromotive forces generated in the respective electromagnetic coils for plural phases when the magnet row moves.

Combined methods for treating a patient using time-varying magnetic field are described. The treatment methods combine various approaches for aesthetic treatment. The methods are focused on enhancing a visual appearance of the patient.

Methods for treating a patient using time varying magnetic field are described. The treatment methods combine various approaches for aesthetic treatment. The methods are focused on enhancing a visual appearance of the patient.

Methods for treating a patient using a time varying magnetic field are described. The treatment methods combine various approaches for aesthetic treatment. The methods are focused on enhancing a visual appearance of the patient. An exemplary method includes charging an energy storage device and discharging the energy storage device to a magnetic field generating device to generate the time-varying magnetic field. The time-varying magnetic field is applied to the patient.

The invention relates to a highly efficient soft magnetic material and the preparing method thereof. The soft magnetic material is composed of metal soft magnetic material and soft magnetic ferrite, the metal soft magnetic material is composed of at least one selected from Fe-Ni-Me system (Me is one or more than two selected form Cu, Cr, Nb, V, W, Si, Pd, Zn, Al, Ti and Mn), Fe-Co system, Fe-Co-V system, Fe-Al system and Fe-Al-Me system (Me is one or more than two selected form Co, Cr and Mo), the soft magnetic ferrite is composed of at least one selected form Mn-Zn system, Ni-Zn system, Li-Zn system, Cu-Zn system and Mg-Zn system soft magnetic ferrites. The preparing method of the soft magnetic material comprises the steps of: cold pressing, and sintering, hot pressing or spark plasma sintering. The soft magnetic material does not have the drawbacks of low resistivity of the metal soft magnetic and low magnetic strength of the ferrite, as well as keeps the superior properties of the metal soft magnetic and low magnetic strength of the ferrite.

An electric machine for direct drive or braking applications with coils providing improved power efficiency and heat transfer is disclosed. The electric machine has a coil body and a winding with a plurality of turns wound on the coil body. Each of the various turns is located in a separate plane. Respective end sections of two different turns are connected by a connecting element, with a major directional component of the connecting element being oriented in an axial direction perpendicular to the plane of one of the two turns. Axially adjacent turns can thereby be connected to one another together. This arrangement reduces or eliminates empty spaces in the slots, particularly when the turns are made from flat wire.

Stators for harmonic motors are disclosed. The stators are easy to assemble and include a laminated armature made of sheet metal plates. The laminated armature is formed of a substantially cylindrical laminated star armature with a plurality of radially outwardly oriented pole heads distributed along the circumference of the laminated star armature, and a substantially cylindrical laminated yoke armature having radially inwardly oriented pole teeth and arranged radially outside of and concentrically with the laminated star armature. Each of the pole heads is arranged radially adjacent to a corresponding one of the pole teeth. Windings are applied to the pole teeth before the tooth head sleeve or the laminated star armature are inserted in and joined with th laminated yoke armature.

A laminated core (10) and a method for manufacturing the same formed with multiple continuous segment core pieces (13) wound in a spiral form by bending connecting portions (12) mutually connecting the segment core pieces (13), the connecting portions (12) being formed in an outer peripheral area (11), while the connecting portions (12) of vertically adjacent layers being displaced in a circumferential direction with inner edges or outer edges of the segment core pieces (13) fitted, the laminated core comprising: a concave cutout (21) provided in a radial exterior of each connecting portion (12) to dispose a radially expanded portion (20) within an outer circle of the laminated core (10), the radially expanded portion (20) being formed with each connecting portion (12) expanding radially outward at the time of bending each connecting portion (12); an interior cutout (22) provided in a radial interior of each connecting portion (12) to define a bending position of each connecting portion (12); and a receptacle (16) provided in a radial exterior of each segment core piece (13) to receive an expanded part (15) of the thickness direction formed in the thickness direction at the time of bending each connecting portion (12).

The invention relates to an electric excitation permanent magnet switch, a reluctance motor for the electric excitation permanent magnet switch and an electric excitation method. In the electric excitation permanent magnet switch, two magnetic poles of a permanent magnet are respectively connected with both ends of an iron core on which magnet exciting coils are wound by two soft magnets; and salient poles are arranged on the soft magnets. In the reluctance motor, the switch is used as basic components of a stator and a rotor, and the two magnetic salient poles of each component are arranged in an axial direction; the salient poles of the stator component and the rotor component are arranged oppositely, and air gaps are reserved between the salient poles; and the magnet exciting coils of the stator component and the rotor component at the axial symmetrical position are connected in series or in parallel and then are used as a phase line respectively to be connected to an excitation control power supply. The invention also provides a combination motor formed by connecting motor monomers by using a shaft in a rotary and dislocation mode and a method for the simultaneous diphase electric excitation of the stator component. The switch and the motor save energy, and have low magnetic loss and high magnetic efficiency; and the combination motor with the diphase electric excitation realizes the subdivision of stepper angles, and improves running stability, control accuracy and output power.

[Object] To provide a vibration actuator capable of obtaining sufficiently sensible vibration with a flat, thin shape maintained.[Solving Means] Two magnets of a moving part are fixed in a direction where magnetic forces of the magnets are repulsed each other, and the moving part is disposed inside a coil of a fixed part in a housing, so that the moving part collides with the housing when an alternating current is applied to the coil. Therefore, vibration is transferred to the case through the collision. Accordingly, it is possible to implement a miniaturized vibration actuator capable of generating a sufficiently sensible vibration.

A substrate with built-in passive element includes passive elements and a substrate. The passive elements include at least one of a capacitor, an inductor, a resistor, a signal transmission element or an optical waveguide element. The capacitor, the inductor, the resistor, the signal transmission element or the optical waveguide element has a functional element filled in a groove-like or hole-like element forming region provided in the substrate along a thickness direction thereof. The functional element has a Si—O bond region obtained by reacting Si particles with an organic Si compound.

A magnetized active water cup is provided, which includes an opening cover opening and closing the cup, a protruding tube formed at the center of the cup, and an elongated rod-shaped permanent magnet fitted in the protruding tube. Here, magnet embedded grooves are formed at certain intervals in the wall of the cup and permanent magnet, a magnetic force blocking cover and a sealing plate are fixed in sequence into each magnet embedded groove. Accordingly, magnetic force lines generated by the magnets 2 and 3 are uniformly influenced on the water contained in the magnetized active water cup, to thus enhance a magnetic efficiency of water.

The invention discloses a horizontal magnetic bar filter and belongs to the field of filtering equipment. The horizontal magnetic bar filter comprises a filter main body, wherein a transmission deviceis arranged on the filter main body; the transmission device comprises a transmission shaft, a chain and magnetic bars; a variable-frequency speed regulation speed reducer, a chain transmission reduction gearbox, a spring type chain tensioner, a draining transmission reduction gearbox and a magnetic bar dirt scraping opening and closing actuating mechanism are arranged at the outer side of the filter main body; the draining transmission reduction gearbox is connected with a screw rod, and an iron powder sludge outlet is arranged at the outer end of the screw rod; and a groove is arranged below the movement path of a magnetic bar dirt scraping rake, and the magnetic bar dirt scraping opening and closing actuating mechanism is connected with the magnetic bar dirt scraping rake. The horizontal magnetic bar filter has the advantages of long service life, smooth running and low noise, and besides, is large in absorbing area and great in separating effect as a large magnetic field is produced due to the high density of the magnetic bars. Besides, the horizontal magnetic bar filter has a certain dirt floating oil removing function, and at the same time, is convenient to clean and maintain as the transmission system is separate from a box body.

The invention concerns an RFID / NFC antenna circuit. An antenna (L) is formed by at least three turns (S), the antenna having a first end terminal (D) and a second end terminal (E), two access terminals (1, 2) to connect a charge, a tuning capacitance (C1, ZZ) for tuning at a prescribed tuning frequency, an intermediate tap (A) connected to the antenna (L) and distinct from terminals (D, E), a first connector (CON1A) connecting the intermediate tap (A) to terminal (1), a second connector (CON2E) connecting end terminal (E) to the capacitance terminal (C1E). A third connector (CON31, CON32) connects the capacitance terminal (C1X) and the second access terminal (2) respectively to a first point (P1) of the antenna (L) and to a second point (P2) of the antenna (L) connected to the first point of the antenna (L) at least one turn (S) of the antenna (L).

A magnetic element includes a first magnetic core, a second magnetic core, an intermediate magnetic core, a first winding coil, and a second winding coil. The intermediate magnetic core is arranged between the first magnetic core and the second magnetic core. After the first magnetic core and the intermediate magnetic core are coupled with each other, a first winding space and a first air gap are defined. After the second magnetic core and the intermediate magnetic core are coupled with each other, a second winding space and a second air gap are defined. The first winding coil is disposed within the first winding space and arranged around the first air gap. The second winding coil is disposed within the second winding space and arranged around the second air gap. The first winding coil and the second winding coil are connected with each other in series.

A portable permanent rotating magnetic rehabilitation device comprises a magnetic roller (1) which is supported in a cylindrical shell (7) that is made of non-metal material, and the magnet roller has the same axis as the cylindrical shell and is driven by a motor (11), and the roller can rotate in the shell without hitting the inner wall of the shell. The device is characterized in that the magnetic roller is a cylinder which comprises five parallel layers along the axial direction of the roller, and the section of which is round; the middle third layer (4) and the first layer and the fifth layer (2 and 6) which are arranged on the surface side of the cylinder are made of ferromagnetic material; the second layer and the fourth layer (3 and 5) between the third layer and the first layer and between the third layer and the fifth layer are made of permanent magnet material, and the magnetization direction is vertical to the joint plane and points to or backs onto the clinging third layer. The device of the invention adopts double magnetic sources and magnetic circuit in parallel, thus shortening the magnetic circuit, bunching the working magnetic flux, balancing the magnetic flux weight composition, overcoming the defects of the magnetic circuit in series of the prior art, and making into the portable permanent rotating magnetic rehabilitation device.