587results about "Electromagnets without armatures" patented technology

A TMS coil assembly for magnetic stimulation of a brain region of a treated subject. The TMS coil assembly comprising one or more coil assemblies, each of which comprising adjacently located, or spaced-apart, flexible winged-coil structures configured to adjustably deform along a tilt axis passing between the winged-coil structures to apply a desired tilt angle between the winged-coil structures for them to conform to curved surfaces of a head of a treated subject and bring substantial loop portions of the winged-coil structures into direct contact with the curved surfaces of the head, to thereby maximize the loop portions that are tangential to the curved surfaces of the head and minimize the loops portion that are non-tangential to the curved surfaces. A fastening arrangement can be used to maintain the desired tilt angle between the winged-coil structures when placed on the head of the treated subject during a TMS procedure, to thereby maximize strength of electric field thereby induced into the head.

The present invention relates to a magnetism generation coil that provides non-invasive treatment by applying a magnetic field to nerve cells or muscle cells of the body. The magnetism generation coil of the present invention comprises: a coil bundle consisting of a collection of a plurality of unit coil strands of a copper material; and a hollow tube surrounding the coil bundle and formed of a flexible material. The unit coil strands forming the magnetism generation coil of the present invention may be formed of an oxygen-free copper (OFC) coil having a low ratio of oxygen to copper.

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 present invention relates to a magnetic field treatment device, and provides a magnetic field treatment machine comprising a coil probe for providing multiple stimulation patterns by means of a magnetic field, wherein the coil prove comprises: a coil unit having a plurality of wound coils; and a case including a cover portion, which accommodates the coil unit, and a withdrawal portion, which extends from the cover portion and accommodates withdrawn coils withdrawn from the respective coils of the coil unit.

A method for an electric nail gun to drive the flywheel to transmit nailing energy, including boosting a start voltage of a battery so as to excite an electromagnet to work and then drive the flywheel loaded with nailing energy in a frictional manner to drive a nailing rod to hit the nail. Specifically, the start voltage is boosted by a voltage boost circuit and stored, and the start voltage can release electric charge to constantly excite the electromagnet to work until completion of the nailing action. Based on the present invention, the nailing quality of the electric nail gun can be enhanced.

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.

A sensor shifting module includes a fixed body, a first movable body movably disposed on the fixed body and coupled to an image sensor having an imaging plane oriented in a first direction, and a first driver configured to rotate the first movable body about an axis orthogonal to the first direction with respect to the fixed body, wherein the first driver includes a tilt guide ball disposed between the fixed body and the first movable body to provide a tilt center for the first movable body with respect to the fixed body.

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 present invention relates to a new form of air, land, underwater, or space propulsion, achieved by the use of suitable electromagnetic interactions. When using coils (1), with internal core (2) and support piece (3), subjected to current pulses with asymmetric current derivative and magnetic field, we obtain directional propulsion forces. This is possible due to a new electromagnetic propulsion mechanism that uses the conservation of total momentum where the sum of the mechanical moment with the moment of the magnetic field must always be conserved, resulting in a constant and null total sum of the two components, where the variation of the magnetic field moment will generate a corresponding change in the mechanical moment of the coil, thus generating propulsion forces. When magnetic fields with asymmetric derivative are produced in an external volume, they may also generate force fields.

The present invention discloses an intelligent manhole cover, which includes a manhole body, one end of which is a manhole opening; a cover plate, which is arranged on the manhole opening of the manhole body; a first driving mechanism, which includes a driving member, a first sleeve column and a second sleeve column, which can be relatively movable in a vertical direction, the upper end of the first sleeve column is connected to the cover plate, and the lower end of the second sleeve column is connected to the manhole body; the driving member includes a first magnetic member and a second magnetic member arranged to be relatively attracted, an elastic component compressed and connected between the first sleeve column and the second sleeve column, and an electromagnetic component for generating a magnetic force when power is turned on to release the magnetic attraction state of the first magnetic member and the second magnetic member; when the magnetic attraction state of the first magnetic member and the second magnetic member is released, the elastic component drives the second sleeve column to rise in a vertical direction so that the cover plate opens the manhole opening. The technical solution of the present invention can realize the automatic opening of the manhole cover, and has the effects of energy saving and safety.

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.

The invention discloses a magnetic pole module, a suspension electromagnet module and a magnetic levitation vehicle, and relates to the technical field of magnetic levitation vehicles, and the magnetic pole module comprises an iron core, a double-layer winding, an insulation heat conduction block, an insulation heat conduction plate and a cooling pipe. The iron core is provided with a groove, the double-layer winding is wound on the iron core, the insulating heat conduction block is embedded in the groove and provided with a containing groove, the insulating heat conduction plate is arranged between the double-layer winding and connected with the insulating heat conduction block, at least part of the structure of the cooling pipe is contained in the containing groove, and the cooling pipe is used for introducing a cooling medium. And the heat generated by the double-layer winding and transmitted to the cooling pipe through the insulating heat-conducting plate and the insulating heat-conducting block is cooled. According to the arrangement mode, the problems that a traditional magnetic pole module and the suspension electromagnet module with the magnetic pole module are poor in heat dissipation performance and limited in bearing capacity improvement are solved.

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 utility model relates to the technical field of medical equipment, and discloses a medical equipment power-off protection alarm device, which comprises an equipment main body, a protection box arranged above the equipment main body, an alarm and a buzzer arranged on the right side of the protection box, and a conduction assembly arranged in the protection box, an iron end is arranged above the power-on electromagnetic block, a base and a power-on assembly are arranged below the power-on electromagnetic block, the power-on assembly comprises a socket, and a plug connected with a buzzer is arranged below the socket. Through the arrangement of the conduction assembly, after the equipment main body is powered off abnormally, the power-on electromagnetic block is powered off and loses magnetic force at the moment, so that the adsorption to the iron end is separated; according to the technical scheme, the plug can be quickly driven to move into the socket, the alarm and the buzzer are powered on, the alarm and the buzzer give an alarm, and a power-off signal of the equipment main body is notified.

The invention provides a method and device for generating a gravitational field to drive a target object to move through a variable electromagnetic field, and relates to the technical field of physics. The frequency, the amplitude and the phase of the electromagnetic field are changed during adjustment, and the effect of changing the magnetic field is generated in space; based on acting force generated by a time-varying electromagnetic field on a target object, the target object is driven to move along a preset track or direction, the acting force similar to a gravitational field is simulated by utilizing the change characteristic of the electromagnetic field, and the effect similar to the gravitational field is generated through the changed electromagnetic field. Therefore, all objects including non-magnetic substances and non-conductive substances are driven to move, accurate control over substance movement is achieved, the limitation that traditional electromagnetic mechanics can only drive metal materials is broken through, the effect similar to gravitational force is generated by adjusting the change of an electromagnetic field, and the effect is achieved. All substances including non-magnetic substances and non-conductive substances are driven to move.

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.