423results about "Electromagnets without armatures" patented technology

A ballast dispenser system and method for flight vehicles, such as high altitude lighter than air vehicles. The system passively retains ballast without power and deploys ballast in response to applying power. An electro-permanent magnet passively retains ballast within the dispenser. Application of power to a coil produces an opposing magnetic field that reduces the overall strength of a net magnetic field acting on the ballast. Lateral positional control of the electro-permanent magnet provides calibration and control of the retaining magnetic field strength. A collapsible silo may hold ballast prior to dispensing ballast and collapse upon landing for minimizing damage.

The invention belongs to the technical field of electronic parts, and provides a damping-adjustable roller structure and a damping adjusting method. The first annular shaft is fixed to the mounting base, and a plurality of first bosses are evenly arranged on the end face of the first annular shaft; the second annular shaft is rotationally arranged on the mounting base, the second annular shaft and the first annular shaft are coaxially arranged, and second bosses are evenly arranged on the surface of the end, facing the first boss, of the second annular shaft; the first annular shaft is provided with a magnetic field coil, the magnetic field coil is used for adjusting the magnetic intensity of the first annular shaft, gaps are formed between the first bosses and the second bosses, and the first bosses and the second bosses are arranged in a one-to-one correspondence mode. The magnetic field intensity of the first annular shaft is changed by adjusting the current magnitude and direction of the magnetic field coil, so that the magnetic attraction force between the first boss and the second boss is adjusted, and the damping is adjustable when the second annular shaft rotates. Meanwhile, the magnetic field coil can convert kinetic energy of the second annular shaft into electric energy to achieve the technical effect of electric energy collection.

The invention discloses a hydraulic mechanism for a water-cooled magnet structure with high mechanical stability. The hydraulic mechanism comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a limiting block, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The water-cooled magnet has the advantages that axial stress application can be carried out on the magnet coil assembly, the pressing force on the magnet coil assembly is improved, the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved, and the high mechanical stability of the water-cooled magnet is improved.

Electromechanical lock and method are disclosed. The lock includes: a movable permanent magnet to move between a first position and a second position; a stationary permanent semi-hard magnet; and an electrically powered magnetization coil positioned adjacent to the stationary permanent semi-hard magnet to switch a polarity of the stationary permanent semi-hard magnet between a first magnetization configuration and a second magnetization configuration. The first magnetization configuration of the stationary permanent semi-hard magnet moves the movable permanent magnet to the first position. The second magnetization configuration of the stationary permanent semi-hard magnet moves the movable permanent magnet to the second position. A magnetic axis of the movable permanent magnet is side by side with a magnetic axis of the stationary permanent semi-hard magnet.

The invention discloses a high-field water-cooling magnet device which comprises a container assembly and a magnet coil assembly, and the magnet coil assembly is located in the container assembly and communicated with the container assembly. The container assembly comprises a hydraulic machine assembly, and the hydraulic machine assembly comprises a cylinder body, a piston, a check ring, a pressure equalizing pad, a first force transmission check ring, a first anti-rotation pin, a second force transmission check ring, a second anti-rotation pin, a first force transmission column and a second force transmission column. The axial force application device has the advantages that axial force application can be performed on the magnet coil assembly, the pressing force on the magnet coil assembly is improved, and the problems of tension fracture and damage caused by coil stress overrun due to overlarge radial expansion electromagnetic force of a magnet coil bit piece and an insulating piece are solved.

The invention relates to an unbalance constraint-based ampere-turn adjuster and a coordination system thereof, which comprise an execution coil group, an execution controller, a first detection module and a communication module, generate a corresponding matching strategy according to a matching request, analyze a response magnetic field waveform to generate a relative position coordinate, and send the relative position coordinate to the execution controller. A deviation evaluation algorithm is configured for calculating a deviation vector corresponding to the actually measured magnetic field deviation, and when the deviation vector meets a static correction condition, a static correction strategy is executed to generate a deviation allocation instruction so as to adjust a control signal of a corresponding target ampere-turn adjuster; and when the deviation vector meets a dynamic correction condition, executing a dynamic correction strategy to generate a position correction instruction so as to correct the relative position coordinates corresponding to the target ampere-turn adjuster. Through introduction of the magnetic field distribution sub-model and the feedback execution sub-system, the efficiency and precision of magnetic field adjustment are further improved, and accurate adjustment is realized in a complex magnetic field environment.

A permanent electromagnetic holder 1 is provided with: a first magnet 3 that has a relatively small coercive force; a ring-shaped second magnet 4 that is a rare-earth magnet having a relatively large coercive force; and a coil 5 for magnetizing the first magnet through energization thereof. The first magnet 3 is configured such that the magnetic pole surfaces of different magnetic poles are oriented in the thrust direction of an axial center α, the second magnet 4 is configured such that the magnetic pole surfaces of different magnetic poles are oriented in the thrust direction of an axial center α, and the second magnet 4 is disposed outside the first magnet in the radial direction of the axial center α. The first magnet 3, the second magnet 4, and the coil 5 are arranged so as to overlap in the radial direction of the axial center α, and an operation of switching an adsorption ON / OFF state is carried out by switching the magnetizing direction of the first magnet 3 through energization of the coil 5 when the adsorption ON / OFF state is switched.

A stage (500) for supporting and moving an object (502) includes an electromagnet (510), first and second support structures (504; 506), a target (508), and a target-side bumper structure. The electromagnet may include a magnetic core, a coil (512), and a magnetic core side bumper attached to the magnetic core. The magnetic core disposed on the first support structure (506) is made of a magnetically conductive material. The magnetic core is shaped to have magnetic poles facing in the same direction. The coil generates a magnetic field. A second support structure (504) supports the object and moves the object relative to the first support structure. A target (508) is disposed on the second support structure (504) to actuate the second support structure in response to the magnetic field. The target-side buffer structure is attached to the target and is capable of colliding with the magnetic core-side buffer structure to establish an anti-collision gap between the magnetic core and the target. The uncertainty value of the anti-collision gap is less than 20 microns.

An article transfer and storage apparatus includes a case installed in a semiconductor factory and including a frame, the frame including at least a first shelf plate extending in a first horizontal direction, and a plurality of storage ports arranged on the first shelf plate and configured to accommodate a semiconductor carrier, and a storage port transport configured to move the storage ports in the first horizontal direction, and a transfer robot including a transport base at a bottom of the transfer robot, the transfer robot configured to place the semiconductor carrier in the case or take out the semiconductor carrier from the case and move the semiconductor carrier.

A liquid cooling system includes first and second coolant tubes and a coupler to couple the first coolant tube to the second coolant tube. The first coolant tube receives coolant liquid from a first element of the liquid cooling system. The second coolant tube provides the coolant liquid to a second element of the liquid cooling system. The coupler is configured to receive an electrical signal to constrict a flow of the coolant liquid.

The utility model discloses an electromagnetic coil, a magneto-rheological shock absorber and an automobile. The electromagnetic coil comprises an iron core and an excitation wire. The iron core is sleeved outside the sliding end, and a wire slot is annularly formed in the peripheral side of the iron core; the excitation wire is wound in the wire slot to form an excitation coil, and the cross section of the excitation wire is in a flat geometric shape; the magnetorheological damper comprises the electromagnetic coil and is applied to an automobile. In the scheme of the utility model, after the excitation lead is wound into the excitation coil, the gap between each turn of lead and the gap between the external lead of the excitation coil and the slot wall of the wire slot are greatly reduced, under the condition that the space of the wire slot is not changed, the number of turns of the coil can be increased by using the flat excitation lead, and the utilization rate of the space in the wire slot is higher; the effective working length of the electromagnetic coil is larger, the maximum damping force of the magneto-rheological shock absorber can be improved, the electromagnetic efficiency is greatly improved, and large damping force can be generated only through small current.

Provided are a method and device for driving movement of a target object by a gravitational field generated by a varying electromagnetic field which relate to the technical field of physics. The method includes: generating, by a variable electromagnetic field generator, a time-varying electromagnetic field in space where a target is located; adjusting a frequency, amplitude and phase of the time-varying electromagnetic field so as to generate an effect of a varying magnetic field in the space; and based on the time-varying electromagnetic field, generating an acting force on the target object to drive the target object to move along a predetermined trajectory or direction. The present invention breaks through limitation that the traditional electromagnetic mechanics can only drive metal materials, utilizes the varying characteristics of the electromagnetic field to drive and realize accurate control of movement of all objects comprising a non-magnetic substance and a non-conductive substance.

Example embodiments are directed a magnetic field generation device including an array of electromagnets including a plurality of electromagnets, and a current controller configured to generate a plurality of current waveforms and to apply each current waveform to a respective one of the plurality of electromagnets. The current controller is further configured to control a pulse duty cycle of each of the plurality of current waveforms. The magnetic field generation device also includes a magnetic field controller configured to calculate each of the plurality of current waveforms to be provided to the respective one of the plurality of electromagnets to generate a desired magnetic field distribution. The plurality of electromagnets include a central electromagnet, and peripheral electromagnets having symmetry in an azimuth direction and arranged about the central electromagnet. Each electromagnet includes a magnetic core and a coil, and a yoke magnetically couples the electromagnets to each other.

An electrically driven fastener structure includes a body, a fastening unit and a wire. The body has a first assembly portion. The fastening unit has a second assembly portion corresponding to the first assembly portion. The wire is adapted to pass a current and to pass through the first assembly portion or the second portion to form a magnetic switch using the first assembly portion or the second assembly portion, so as to drive the magnetic switch based on on or off or strong or weak of the current, or to drive the magnetic switch based on on or off or strong or weak of a magnetic force.

Exemplary embodiments of the present disclosure apparatus and methods for enhancing the steerability of catheters, including for example those used in peripheral artery disease PAD interventions. Exemplary embodiments include a permanent magnet coupled to an end of a segmented tubular member, an electromagnet, and a controller configured to control a magnetic force exerted by the electromagnet on the permanent magnet. Exemplary embodiments further comprise systems and methods for detecting the location of a magnetic element via magnetic sensors.

The invention relates to the technical field of magnetic therapy, and discloses an electromagnetic physical therapy device which comprises a framework, a coil, a magnetic needle, a cooling fin and a supporting sleeve, the framework is provided with an up-down through assembly hole, the coil is wound on the periphery of the framework, the supporting sleeve is provided with an up-down through magnetic needle cavity, and the bottom of the supporting sleeve is provided with a protruding block extending outwards. The magnetic needle is fixed in the magnetic needle cavity, the supporting sleeve extends into the assembling hole of the framework, the protruding block extends out of the assembling hole and is attached to the bottom face of the framework, the cooling fin is provided with a vertically-through cooling hole, a groove is formed in the periphery of the top of the cooling hole, the top of the cooling hole is fixedly connected with the bottom of the framework, and the cooling hole corresponds to the assembling hole in position. The groove accommodates the protruding block so that the protruding block can be clamped by the framework and the cooling fin, and therefore the magnetic needle can be fixed in the assembling hole, the assembling hole does not need to be filled with pouring sealant, and the magnetic needle and the framework can be detached from each other.

The invention relates to the technical field of electromagnetic shielding, and particularly discloses an electron microscope chamber magnetic shielding method, a computer readable storage medium and an electronic device. The electron microscope chamber magnetic shielding method comprises a shielding shell; the electromagnetic compensation coil is arranged in the shielding shell; the electromagnetic compensation coil is electrically connected with a magnetic field compensation controller, and the magnetic field compensation controller is electrically connected with a high-precision magnetic sensor and a computer. The high-precision magnetic sensor is used for monitoring magnetic field distribution in the shielding body in real time; and the magnetic field compensation controller is used for independently regulating and controlling the driving current of each electromagnetic compensation coil. The technical problems that electromagnetic interference generated by adjacent room equipment needs to be shielded and electromagnetic interference field intensity generated by accessory equipment of experimental equipment needs to be eliminated in a high-precision magnetoelectric experiment, and the electromagnetic interference is difficult to determine and effectively eliminate due to the fact that specific performance parameters of the electromagnetic equipment are often not clear in the actual situation are solved.

A writing utensil such as a pen having multiple magnetic members along its barrel. The magnetic members have opposite polarity so as to drive each other away. One of the magnetic members may be bonded to the barrel while the other extends around it to form a ring with an inner circumference large to allow it to move along the barrel between the bonded magnetic member and a capturing mechanism at a top end of the barrel. The capturing mechanism may have a metal member to retain the floating magnetic member for temporary storage.

A vehicle for driving on ferromagnetic structures includes a chassis, first and second wheels rotatably coupled to the chassis, and a magnet array coupled to the chassis for magnetically attracting the vehicle to the structures. The magnet array is controllable to aim a magnetic field produced by the magnet array over a range of angles relative to the chassis.

The magneto-rheological electromagnet comprises a shell (1), a coil (6) is wound in a coil assembling groove (1.2) in the outer wall of the shell (1), a wire (2) is connected to the coil (6) after being inserted into the shell (1), the wire (2) is connected to a connecting column (3), the connecting column (3) is inserted into a mounting piece (2), the mounting piece (2) is embedded in a mounting hole (1.1) of the shell (1), a wire groove (1.3) is formed in the shell (1), and the wire groove (1.3) is connected with the wire (6). And a leading-out wire of the coil (6) passes through the wiring trough (1.3) and then is connected to the connecting column (3). The magneto-rheological electromagnet has the advantages of being resistant to pressure, good in sealing effect and reliable in assembly.

The invention relates to a method for generating an electromagnetic field by means of an applicator (5) with low-frequency current pulses (10), the low-frequency current pulses (10) being generated by a generator (3) for generating the electromagnetic field, a plurality of current pulses (10) following a signal profile, a respective current pulse (10) comprising a first signal component in the form of a rectangular pulse, a current pulse interval (16) is provided between the two current pulses (10), and the amplitude of the current pulses (10) is modulated with a modulation frequency in the sinusoidal signal curve. The invention further relates to a device for carrying out the method.

This application relates to the technical field of magnetic particle flaw detection equipment. Specifically, it is a fluorescent magnetic particle flaw detection equipment for the inner and outer surfaces of the pipe ends of steel pipes. Through the synergistic effect of the composite magnetization component and the annular pulsating DC guiding magnetic yoke, a three-dimensional rotating dynamic composite magnetic field is formed at the pipe end of the steel pipe, effectively solving the problem of uneven magnetic field distribution in the pipe end area of traditional equipment and achieving dead-angle-free detection of the inner and outer surfaces. The stepped increasing section and the oscillating maintaining section of the pulsating magnetization power supply adjust the magnetic field strength to change with time, enabling the magnetic field to penetrate the wall thickness of the steel pipe during the detection process while avoiding the problem of magnetic saturation. The radial position of the circumferential magnetic yoke coil group and the axial position of the longitudinal magnetic yoke can be programmatically adjusted to support the detection of steel pipes with an outer diameter ranging from 80 mm to 820 mm. Synchronous detection of the inner and outer surfaces is achieved through a single composite magnetization component, avoiding the design of two sets of independent magnetization devices in traditional technologies and reducing costs.

An electronic device including a wireless charging device is provided. The wireless charging device includes a power transmission coil for wirelessly transmitting power to the electronic device, and a first coil which is disposed inside the power transmission coil and by which a magnetic field is formed in a first direction. The electronic device includes a power reception coil for wirelessly receiving power from the power transmission coil, and a second coil which is disposed inside the power reception coil and by which a magnetic field is formed in a second direction opposite the first direction, wherein the first coil and the second coil are configured to be matched so that the power transmission coil and the power reception coil are aligned.

The invention discloses a pulsed high-intensity magnetic field generation device and method. The device comprises a vacuum chamber; the spiral backflow assembly is located in the vacuum cavity and comprises a conductive bottom plate, a conductive top plate located over the conductive bottom plate and a plurality of conductive spiral rods, a first through hole is formed in the conductive bottom plate, one end of each conductive spiral rod is connected to the conductive bottom plate, and the other end of each conductive spiral rod is connected to the conductive top plate; the plurality of conductive screw rods are uniformly distributed in the circumferential direction around the axis of the first through hole and have the same spiral direction; the plasma generating assembly comprises a first conductive block penetrating through the first through hole and not making contact with the bottom plate, a second conductive block located over the first conductive block and connected with the conductive top plate and a plurality of micron-sized conductive wires, one ends of the micron-sized conductive wires are connected to the first conductive block, and the other ends of the micron-sized conductive wires are connected to the second conductive block; the plurality of micron-sized conductive wires are uniformly distributed in the circumferential direction around the axis of the first through hole; the positive electrode of the pulse current source is electrically connected to the conductive bottom plate, and the negative electrode is electrically connected to the first conductive block. The invention aims to generate pulsed magnetic field intensity by using a simple device structure.

An interference reduction device is provided. The interference reduction device may include a magnetic shield positioned in proximity of a magnetic field. The magnetic shield is configured to reduce interference on the magnetic field along the direction of the magnetic field. The magnetic shield may include a cutout approximately parallel to the direction of the magnetic field, the cutout is configured to reduce a distortion caused by the magnetic shield on the magnetic field.

The present invention relates to an optimized structure and a control system of a magnetic lifter. The control system of a magnetic lifter according to an embodiment of the present invention may comprise: a magnetic lifter unit comprising a plurality of ports in the form of an accommodation groove and comprising auxiliary magnetic poles which are accommodated and fixed in the plurality of ports, respectively, operate as a magnetic lifter having N and S poles when external power is applied, to generate an attractive force with respect to an object to be attracted, and prevent magnetic force loss caused by an air gap with a contact surface of the object to be attracted; and a magnetic force control device configured to convert a DC voltage applied to a solenoid coil into an AC voltage and apply the converted voltage, in order to remove residual magnetism of the object to be attracted after the object to be attracted is lowered to a destination.

The invention provides a magnetic flux generator to enhance ion transport in an electrochemical cell. The magnetic flux generator comprises one or more magnetic field sources, each being configured to produce a respective magnetic field. Each magnetic field is individually controllably variable in three spatial dimensions.

A magnetic field generation module is disclosed. The magnetic field generation module comprises: a main core; at least two auxiliary cores positioned in the vicinity of and around the main core; auxiliary coils wound on respective auxiliary cores; and a power source unit for applying a current to the auxiliary coils.

Provided is a device sealed with a magnetic liquid. The device includes: a rotary shaft, a tank body, a control unit, a first module, a second module, a magnetic liquid, and a pole-tooth. The first module and the second module are in the same configuration, each consists of an outer shell, a left pole-shoe, an electromagnet, a control wiring, a right pole-shoe, and a circlip. The device includes at least two modular structures; the control unit controls a first electromagnet and a second electromagnet to be magnetized to alternately bear a sealing role.

To provide a magnetic component and a method of manufacturing the same.SOLUTION: A magnetic component includes a magnetic device, a base, and a positioning frame. The magnetic device includes a top part and a bottom part which are disposed oppositely, and the magnetic device includes a magnetic core and a coil which is provided while being wound around the magnetic core. The base includes a base plate. The positioning frame has a positioning part and a peripheral wall, the peripheral wall includes a first end and a second end which are provided oppositely, the first end and the second end respectively correspond to the top part and the bottom part of the magnetic device, and the peripheral wall is vertically connected to an outer edge of the positioning part in a circumferential direction by the first end. The second end of the peripheral wall of the positioning frame is connected to an outer edge of the base plate in the circumferential direction. Thus, the positioning frame encloses a storage space together with the base plate, the magnetic device is positioned in the storage space, and the top part of the magnetic device is brought into contact and engaged with the positioning part of the positioning frame.SELECTED DRAWING: Figure 2D