60 results about "Ampere force" patented technology

The utility model relates to an experimental device for verifying the Ampere force law, which comprises a direct-current power supply, a high-power resistor, two metal electrodes respectively serving as a positive electrode and a negative electrode, a bracket, a precise length measuring tool, two opposite magnets, a container filled with conductive liquid and a high-precision electronic scale, the direct-current power supply is used for providing a power supply in an experiment; the high-power resistor is used for limiting the maximum current in the circuit and preventing the circuit from being short-circuited due to over-low loop resistance; the two metal electrodes which are respectively used as a positive electrode and a negative electrode are used for providing current for the conductive liquid which is used as a current carrier and conducting the whole circuit; the metal electrode is electrically connected with the high-precision direct-current power supply and the high-power resistor; the two opposite magnets are used for providing a magnetic field; the container filled with the conducting liquid is used for containing the conducting liquid serving as a current carrier and bearing Ampere force borne by the conducting liquid in a magnetic field.

The application provides an electromagnetic inertial actuator, permanent magnets, inner yoke iron and outer yoke iron are fixedly connected by using non-magnetic retainer, so that only ampere force exists in the magnetic circuit system, and good output linearity of the actuator is ensured. On this basis, disc-shaped spring plates with quasi-zero stiffness characteristics are arranged, the inherent frequency of the system is reduced, and low-frequency output performance is ensured. The permanent magnets, the inner yoke iron, the outer yoke iron, the end cover and the heat dissipation device are integrally designed, a large inertial actuator mover mass is formed, the effective mass of the actuator, i.e. the ratio of the mass of the movable part to the total mass, is maximized. In this way, the low-frequency output and the output value per unit mass can be improved, the total volume and mass of the inertial actuator are effectively reduced, and the installation space is saved. Meanwhile, increasing the mass of the mover can effectively reduce the low-frequency vibration displacement of the inertial actuator, and the quasi-zero stiffness characteristics can be further ensured to be realized and stable.

The utility model discloses a servo tachometer unit structure with a magnetic damper, and belongs to the technical field of aviation brake structures. Comprising a stator assembly (1), a rotor assembly (2), a damper assembly (3), a damper iron core (4), a pin (5) and a bearing (6). When the servo tachometer unit works, the rotor assembly 2 runs at a high speed, the rotor assembly 2 belongs to a conductor in a magnetic field of the stator assembly, the conductor cuts magnetic induction lines and generates induction current when moving, and the induction current generates ampere force opposite to the original moving direction of the conductor in a magnetic field provided by the damper assembly 3. Deceleration and stable control of the conductor, namely the rotor assembly 2, are realized; when the servo tachometer unit works, the rotor assembly rotates at a high speed, the magnetic damper provides a reverse magnetic field for the rotor assembly, deceleration and stable control over the rotor assembly are achieved, and the servo tachometer unit stops rotating quickly during high-speed work and works more efficiently.

Various Freight left hand rules (motor rules), right hand rules (engine rules), Ampere rules 1, Ampere rules 2 (right hand spiral rules), Lorentz forces, Ampere forces and the like exist in the fields of electrotechnics, electromagnetics, optics and the like and are used for judging current, magnetic fields and acting force directions. And memory disorder of students and technicians is easily caused. The electronic magnetic pole and the spinning direction (figure 1 in the specification) are marked by using an electronic spinning right-hand rule expression method, and all the rules and forces can be replaced and unified. And three breakthrough discoveries are caused: (1) an electron magnetic pole and a spinning direction rule are caused; and (2) the electromagnetic field is the expansion, static and retraction type expression of the electronic ring. And (3) the expansion type electronic ring has the characteristics of electromagnetic wave (including light wave) particles, fluctuation, electromagnetism, quantum and the like, and solves the optical hundred-year competition problem. And more electronic equipment and products can be developed according to the'electron spin right hand rule '.

The utility model relates to the technical field of Ampere force exploration, and discloses an Ampere force exploration device used under holographic perception, which comprises a supporting plate, a bottom rod is fixedly connected onto the supporting plate, a control circuit board is mounted on the bottom rod, a double-pole double-throw switch is arranged on one side of the control circuit board, and the other side of the control circuit board is provided with an optical fiber. The double-pole-double-throw switch is electrically connected with a first wire, a second wire, a third wire and a fourth wire, and the top of the supporting plate is fixedly connected with a current direction indicator. According to the utility model, the main body of the device adopts a vertical structural design, so that demonstration in scenes such as classroom teaching and the like is very convenient, a good visual effect can be provided for students, the students can conveniently observe and understand experiment phenomena, and meanwhile, in the experiment process, the experiment efficiency is greatly improved. The first lead, the second lead, the third lead and the fourth lead can obviously deflect left and right, the direct phenomenon can clearly demonstrate the direction of the Ampere force borne by the leads, and students can clearly know the acting effect of the Ampere force at a glance.

The present application discloses a coating device (20) and a production system (90). The coating device (20) is used for preparing a coated product (101). The coated product (101) comprises a substrate (1011) and a metal film (1012). The coating device (20) comprises: a cooling assembly (201) comprising at least one magnetic field generating component for providing a magnetic field, and a current generating assembly (202) used for enabling a current to pass through the coated product (101), so that the direction of an ampere force applied to the coated product (101) in the magnetic field points to the cooling assembly (201). After being electrified, the metal film (1012) of the coated product (101) can be approximately regarded as an electrified conductor, and the electrified conductor experiences the ampere force in the magnetic field. Compared with methods of attaching cooling assemblies by means of electrostatic adsorption forces, the present application exhibits a relatively large ampere force, such that the coated product can be more tightly attached to the cooling assembly. The coated product prepared has a smoother surface and is more uniformly cooled by the cooling assembly, and the film surface is not prone to damage, so that the probability of deformation of the film surface can be reduced, thereby improving the yield of the coated product.

Disclosed are a winding apparatus and a winding method, the winding apparatus includes: a winding needle, being configured to wind a winding material; a power supply assembly, being configured to be electrically coupled to the winding needle, so as to form current on an axis of the winding needle; and a magnet supply assembly, being configured to provide a magnetic field to the winding needle, a magnetic field direction intersecting the axis of the winding needle so that the winding needle generates an ampere force for resisting a deformation of the winding needle in the magnetic field when the winding material is wound. By the above method, the present application may reduce the deformation of the winding needle, reduce a defective rate of a winding product formed by the winding of the winding material, and improve quality of the winding product.

The utility model discloses a miniature loudspeaker, which comprises a vibration assembly, a yoke, and magnetic steel and a basin stand which are arranged on the yoke, the yoke is also provided with a plurality of magnet assemblies, each magnet assembly comprises a first magnet and a second magnet, and a gap is arranged between the first magnet and the second magnet; the vibrating assembly comprises a vibrating diaphragm and a voice coil which are connected with each other, the vibrating diaphragm is arranged on the basin frame, the voice coil is located in an area formed by the basin frame in a surrounding mode, the magnetic steel is arranged in the area formed by the voice coil in a surrounding mode, a plurality of wires are bonded to the outer side wall, away from the magnetic steel, of the voice coil, and at least part of the wires are located in the distance between the first magnet and the second magnet. According to the utility model, when the miniature loudspeaker works, the electrified wire moves up and down along with the voice coil to cut a magnetic induction line, so that the electrified wire is subjected to a corresponding ampere force, the current of the wire is changed, the magnitude of the force can be controlled, and the vibration state of the miniature loudspeaker is further controlled.

1. The name of the design product: Ampere force experiment frame. 2. The use of the design product: The design product is used as a teaching device, specifically for Ampere force experiment. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The present invention discloses a low-frequency capacitive closed-loop acceleration sensor, which uses a multi-layer circuit board made of FR4 material as the main body of the low-frequency capacitive acceleration sensor. The main body circuit board includes: a mass block for detecting vibration; an elastic structure formed by CNC machining to form a folded cantilever beam; a coil structure in the middle layer of the circuit board and two groups of copper metal arrays on the top layer. A circuit board symmetric to the copper metal array is welded and fixed above the main body circuit board to form a differential capacitance plate. There is an acrylic shell with grooves outside, and a set of magnets with opposite magnetic fields in the vertical direction are placed at the left and right grooves respectively. Interfaces are left around the circuit board for introducing coil current, and combining with the magnetic field to generate Ampere force to achieve closed-loop control. The sensor of the present invention can detect low-frequency signals (<10Hz), has a simple production process, low material cost, and has good anti-interference and stability.

The invention discloses a self-adaptive stroke swing type surface microscopic cold forging device. The device comprises a mechanical interface, a holder motor, a rack, a permanent magnet, a bearing and a rotor. Wherein the rotor with the coil can freely rotate around a bearing on the rack, current is introduced into the coil, the coil is subjected to Ampere force in a magnetic field generated by the permanent magnet, the rotor is driven to rotate, and the impact head at the tail end of the rotor is further driven to impact the hole wall in a reciprocating mode; furthermore, along with rotation of a holder motor and axial feeding movement of a machine tool / mechanical arm, the hole wall of the whole inner hole is evenly and orderly impacted, and finishing and strengthening integrated machining of the hole wall is achieved. Compared with an existing swing type surface microscopic cold forging device with a built-in limiting structure, the hole wall serves as the limiting structure of the device, stroke self-adaption is achieved, and the swing type surface microscopic cold forging device has the advantages that the machining efficiency is high, impact on a machine tool spindle / mechanical arm joint is reduced, and the requirement for the positioning precision of a machine tool / mechanical arm is lowered.

The invention discloses a high-initial-thrust electromagnetic actuating device with a multi-magnetic-field mixing effect, and belongs to the technical field of aerospace. The problem that a spacecraft cannot be separated at a preset speed due to the fact that an existing electromagnetic actuator is small in initial thrust is solved. The stator comprises an outer magnetic structure, an inner magnetic structure, an upper magnetic structure, a lower magnetic structure and a stator coil structure, and the lower magnetic structure comprises a lower magnetic yoke, a lower inner axial magnetic ring and a lower outer axial magnetic ring, the inner magnetic structure comprises an inner magnet yoke, an inner upper radial magnet ring, an inner middle axial magnet ring and an inner lower radial magnet ring, wherein the inner upper radial magnet ring, the inner middle axial magnet ring and the inner lower radial magnet ring are coaxial and sequentially sleeved outside the inner magnet yoke from top to bottom. The magnetic flux loop formed by the two radial magnetizing permanent magnet rings with small heights is utilized to increase the air gap magnetic field intensity of the part, close to the stator coil, between the two radial permanent magnet rings with large heights, so that the Ampere force borne by the rotor coil is increased, and the initial thrust is increased.

The invention discloses an electromagnetic anti-seismic drawing test machine and an anti-seismic method. The drawing test machine comprises a machine table, an oil cylinder, a sliding table, an upper clamping jaw, a lower clamping jaw, a first coil, a second coil and a reverse current control module, and a permanent magnet is arranged in a piston rod of the oil cylinder; when the reinforcing steel bar is pulled off, the piston rod vibrates due to impact force, the piston rod axially moves in the second coil, the second coil cuts magnetic induction lines, and induced current is generated; the induced current can be used as an indirect index of impact force; the first coil is electrified to generate corresponding reverse Ampere force, so that instant shock resistance can be realized, and reverse shock of the piston rod caused by overlarge reverse force is avoided; the reverse current control module can monitor the current value in the second coil in real time and then correspondingly change the reverse current required by the first coil according to the latest detected instantaneous maximum current value to form a closed loop of vibration detection, force feedback and dynamic adjustment.

This invention relates to a device for eliminating wrinkles in the rolling process of lithium-ion battery electrodes. The device is positioned after the electrode (4) is rolled and before a tensioning mechanism or a winding mechanism. The electrode (4) includes a coated area and an uncoated area. The device includes at least two sets of rolling assemblies, each set symmetrically arranged on the upper and lower surfaces of the electrode (4). A conductive ring device (3) is mounted on each rolling assembly, directly contacting the uncoated foil (5) of the electrode (4). A magnet is positioned between adjacent rolling assemblies, generating a magnetic field perpendicular to the surface of the electrode (4). The uncoated foil (5) is subjected to Ampere force in the magnetic field, generating a non-contact tensioning force to both sides, thus eliminating rolling wrinkles. Compared with the prior art, this invention utilizes the non-contact method of Ampere force to improve the uneven stress field within the lithium-ion battery electrode after rolling, effectively solving the wrinkles and buckling problems that occur during the rolling process.

The present invention discloses a constant force rolling tool and rolling method for the root and end of external threads. The tool includes a rolling tool head, a pressure sensor, an electromagnetic force device, a cover plate, a tool handle, a laser sensor, and a magnet. Since the present invention uses an electromagnetic force device to utilize Ampere force to drive a rolling wheel to roll high-strength bolts, the rolling wheel generates rolling pressure on the root of the thread, ensuring that the uniform magnetic field strength B and the length L of the conductor rod remain unchanged. Before rolling begins, the pressure sensor feeds back the pressure magnitude to the voltage controller. The voltage controller ensures that the magnitude of the current I reaches the set value by changing the voltage magnitude. According to F 安 =BIL, ensuring constant rolling force during rolling. This invention uses a laser sensor, and the turret controller automatically calculates the retraction position based on the feed speed and position information fed back by the laser sensor. This ensures that the retraction command is executed only after the rolling tool has rolled the entire thread end, improving rolling accuracy and efficiency.

The utility model discloses an ampere force demonstrator, and belongs to the field of teaching experiment instruments. The demonstrator comprises a base, a coil rack is arranged on the base, and two magnetic devices are symmetrically arranged on the two sides of the coil rack along the center of the coil rack. A wire capable of being electrified is wound on the coil rack; a connecting part is formed at the lower end of the coil rack; the lower end of the connecting part is connected with a gravity sensor; the two magnetic devices can move towards each other and away from each other; the device further comprises a control center, the control center comprises a displayer arranged on the base, and the control center is electrically connected with the gravity sensor. According to the utility model, the gravity sensor is connected with the control center, and the magnitude of the Ampere force is directly read on the display screen through the gravity sensor, so that the magnitude of the Ampere force can be observed more visually. In addition, the current, the magnetic field intensity and the included angle between the magnetic field and the current can be adjusted through the control center, and various factors influencing the Ampere force can be conveniently experimented and explored.

The invention belongs to a proportional electromagnet structure in the technical field of automobile parts. A winding (84) of the framework assembly (8) is wound on a framework body (82), a steel ball (81) and a small contact pin (83) are injected into the framework body (82) through an injection molding process, a plurality of permanent magnets and a plurality of rear yoke sleeves are sleeved on an outer ring of a central cylinder (321) with a hole, and the permanent magnets and the rear yoke sleeves are positioned on an inner ring of the winding (84); when the winding (84) is electrified, the current direction of one side of the winding (84) is from inside to outside, the current direction of the other side of the winding (84) is from outside to inside, and the winding (84) is subjected to Ampere force in a constant magnetic field. Compared with a traditional proportion electromagnet, the proportion electromagnet structure has the advantages that the moving coil structure design is greatly simplified, the requirement for part machining precision is remarkably reduced, high-quality horizontal characteristics can be output, the precision, stability and reliability of an automatic system are improved, and the cost is reduced.

The application discloses a rocking-preventing hoisting device and method based on nodular cast iron pipe jacking mold production and relates to the technical field of hoisting equipment. Through the electromagnetic damping principle of "magnetic field, conductor cutting and ampere force resistance", electromagnets are alternately arranged to form a closed magnetic field loop perpendicular to the vertical axis of the steel wire. When the steel wire shakes under external force, the steel wire as a conductor cuts the magnetic induction lines to generate an induced current. The induced current is subjected to an ampere force in the magnetic field, which is opposite to the shaking direction, so that the shaking energy is rapidly attenuated. Compared with the traditional mechanical damping, the mechanism has no mechanical contact wear, the response time is greatly shortened, and the problems of damping hysteresis and slow shaking attenuation of the traditional device are solved. Meanwhile, the thermal energy driving unit drives the resistance adjusting sliding block through the thermal expansion of the heat conducting oil, automatically reduces the resistance of the sliding resistor, further increases the induced current and the damping force, and significantly shortens the shaking attenuation time compared with the fixed damping scheme.

The application discloses a large initial thrust electromagnetic actuator with multi-magnetic field mixing effect and belongs to the technical field of aerospace. The application solves the problem that the existing electromagnetic actuator has small initial thrust and causes the spacecraft to be unable to separate at a predetermined speed. The stator comprises an outer magnetic structure, an inner magnetic structure, an upper magnetic structure, a lower magnetic structure and a stator coil structure, the lower magnetic structure comprises a lower magnetic yoke and a lower inner axial magnetic ring and a lower outer axial magnetic ring which are installed at the top end of the lower magnetic yoke, and the inner magnetic structure comprises an inner magnetic yoke and an inner upper radial magnetic ring, an inner middle axial magnetic ring and an inner lower radial magnetic ring which are coaxial and are sequentially sleeved on the outside of the inner magnetic yoke from top to bottom. The magnetic flux loop formed by two small-height radial magnetizing permanent magnetic rings is utilized to increase the air gap magnetic field intensity of the part close to the stator coil between the two high-height radial permanent magnetic rings, so that the ampere force borne by the mover coil is increased, and the initial thrust is increased.

The invention discloses an electromagnetic tensioner based on the Ampere force principle. The electromagnetic tensioner comprises a plurality of permanent magnets and at least one electric conductor. The plurality of permanent magnets comprise at least two groups of magnetic pole units, and each group of magnetic pole unit is formed by arranging two permanent magnets symmetrically and oppositely, so that a magnetic gap space with a uniform magnetic field is formed. The electric conductor movably and vertically penetrates through the magnetic gap space, and the movement track of the electric conductor is restrained by the mechanical limiting device so as to ensure that the electric conductor is always located in the magnetic gap space in the working process. The relative relation between the magnetic field direction and the conductor current direction is directionally designed, so that Lorentz force vectors generated by the electric conductor in a power-on state form a same-direction superimposed effect. By controlling or adjusting the magnitude and direction of the input current, the output force can be adjusted very accurately, sensitively and quickly.

This disclosure relates to a loudspeaker and an electronic device. The loudspeaker includes a vibration system and a magnetic circuit system. The magnetic circuit system includes an electromagnet, which provides a magnetic field to cause the vibration system to vibrate and produce sound. The strength of the magnetic field generated by the electromagnet is positively correlated with the intensity of the current flowing through it. In this embodiment, a sufficiently large current can be passed through the electromagnet to generate a stronger magnetic field than that of a permanent magnet in the prior art, thereby generating a stronger Ampere force to drive the vibration system to vibrate and improving the loudspeaker's external sound performance. In addition, a variable magnetic field can be generated when the intensity of the current flowing through the electromagnet changes. The magnetic field strength can be adaptively adjusted according to the length of the magnetic field lines cut by the vibration system to keep the BL curve uniform, reduce or avoid distortion or noise, and improve the external sound quality of the loudspeaker.

The invention discloses a service life detection method, device and equipment of an electric vibration system and a medium. The electric vibration system comprises a moving part, and the life detection method comprises the following steps: obtaining an input current of the moving part during operation, and determining an ampere force borne by the moving part according to the input current; determining strain distribution information and stress distribution information of the moving part according to the Ampere force and a finite element analysis method; determining the estimated fatigue life of the moving part according to the strain distribution information, the stress distribution information and the material fatigue parameter of the moving part; and determining a life detection result of the electric vibration system according to the input current, the estimated fatigue life and the operation time of the moving part. According to the life detection method, life detection of the whole electric vibration system can be realized by evaluating the life of the moving part, the method is simple, and the life detection efficiency of the electric vibration system can be improved.

The invention provides an anti-shake circuit board assembly and application thereof. According to the invention, the permanent magnet is arranged on the first circuit substrate, and the first coil is arranged on the second circuit substrate, so that the Ampere force generated by the first coil in the magnetic field of the permanent magnet can drive the first circuit substrate to move in the thickness direction, thereby driving the image sensor to move in the thickness direction. Therefore, displacement offset caused by shaking can be compensated, and the anti-shaking function is achieved. According to the anti-shake circuit board assembly, the first area of the second circuit substrate is connected with the side surface of the first circuit substrate, so that the size of the anti-shake circuit board assembly can be reduced.

Embodiments of this application provide a linear motion electromagnetic mechanism (100), a relay (1000), a power distribution box (2000), and a communication device. In a linear motion electromagnetic mechanism (100), a first bipolar charging permanent magnet (120) and a second bipolar charging permanent magnet (130) are respectively disposed on two opposite inner walls of a frame-shaped portion (110a) of a magnetic yoke (110), and a first parallel magnetic field (129) and a second parallel magnetic field (139) that are in opposite directions are formed between the first bipolar charging permanent magnet (120) and the second bipolar charging permanent magnet (130). Two semi-ring portions of a powered-on coil (142) are subject to co-directional ampere forces, and the coil (142) drives a movable rack (141) to perform translation motion. The coil (142) is bi-directionally powered on, so that the movable rack (141) moves bi-directionally, to implement switching work of the relay (1000). A first moving iron core (143) and a second moving iron core (144) are configured to form a holding force on the movable rack (141) when the movable rack (141) is at a switch-on position or a switch-off position, to limit a position of the movable rack (141). In the linear motion electromagnetic mechanism (100), one magnetic field cavity provides bipolar magnetic fields, and the powered-on coil (142) is subject to the ampere forces in the bipolar magnetic fields to drive the movable rack (141) to translate, so that a small quantity of parts are used, and an overall structural thickness is smaller.

The invention discloses a film coating device and a production system, the film coating device is used for preparing a film coating product, the film coating product comprises a base material and a metal film, and the film coating device comprises: a cooling assembly comprising at least one magnetic field generating part for providing a magnetic field; and the current generation assembly is used for enabling current to pass through the coated product, so that the Ampere force applied to the coated product in the magnetic field points to the cooling assembly. After the metal film of the coated product is electrified, the metal film can be approximately regarded as an electrified conductor, and the electrified conductor is subjected to Ampere force in a magnetic field. Compared with the mode that electrostatic adsorption force is attached to the cooling assembly, the Ampere force is large, and the coated product can be attached to the cooling assembly more tightly. In this way, the surface of the prepared coated product is smoother, cooling is more uniform through the cooling assembly, the film surface is not prone to damage, and therefore the probability of film surface deformation can be reduced, and the yield of the coated product is increased.

The present application discloses a magnetically actuated soft inspection robot for creeping over obstacles on a high-voltage DC transmission line. In this solution, by the action of the Ampere force on the energized coil in the annular enhanced magnetic field generated around the high-voltage DC transmission wire, the linear drive magnetic core energized coil generates a forward driving force and the adsorption magnetic core energized coil generates an adsorption force perpendicular to the forward direction. Based on this, by operating the current direction of the adsorption magnetic core energized coil, the two magnetic force adsorbers located at both ends of the creeping soft body alternately generate magnetic suction force or release the magnetic suction force, and by operating the current direction of the linear drive magnetic core energized wire, the two magnetic force linear drivers located at both ends of the creeping soft body alternately generate driving force or release the driving force, thereby generating an obstacle-crossing action. This inspection robot operates flexibly, has few steps and high efficiency in creeping over obstacles, runs smoothly when crossing obstacles, and has high safety, and is especially suitable for crossing two types of fittings such as spacer dampers and vibration dampers.

An amper force demonstration instrument, including base, the upper end middle part of base is equipped with pressure sensor, the upper end of pressure sensor is equipped with adjustable coil, the upper end of base is equipped with support rod in left and right opposite sides vertically, support rod is connected with crosspiece between, the middle part of crosspiece is vertically equipped with connecting rod, crosspiece and connecting rod rotate and cooperate, the upper end of connecting rod is equipped with limit rotation subassembly for limiting rotation angle, the middle part lower end of crosspiece is equipped with angle scale, be equipped with pointer on connecting rod, the lower end of connecting rod is connected with placing rack, the lower end of placing rack is equipped with the subassembly that can adjust magnetic induction intensity and keep magnetic field size distribution uniform. The utility model discloses through pressure sensor and adjustable coil cooperation, can directly measure amper force size, and can enhance magnetic induction intensity, and realized the multiple superposition of magnetic induction intensity, accurate adjustment magnetic induction intensity makes the magnetic force size distribution of magnetic field uniform, satisfies different experimental demand.

The electromagnetic actuator device for increasing initial thrust with electromagnetic assistance belongs to the technical field of aerospace. The present application solves the problem that the existing electromagnetic actuator has small initial thrust, which causes the spacecraft to be unable to separate at a predetermined speed. The stator comprises an outer magnetic structure, an inner magnetic structure, an upper magnetic structure, a lower magnetic yoke and a stator coil structure, the outer magnetic structure is sleeved outside the inner magnetic structure, the mover comprises a mover coil structure, the mover coil structure comprises a mover coil framework and a mover coil arranged on the mover coil framework. The stator coil is given opposite current to the mover coil, the strong electromagnetic field generated is opposite to the electromagnetic field generated by the mover coil, and the electromagnetic field generated by the stator coil generates strong thrust on the mover coil structure at the moment of electrification. On the basis of the ampere force suffered by the original coil in the permanent magnetic field, a large electromagnetic repulsive force is additionally suffered, the initial thrust suffered by the mover coil structure is increased, and the target spacecraft separates at a predetermined speed.

The utility model discloses a double magnetic circuit structure of ultrathin woofer, including shell, magnetic member, voice coil, damper and cone, the magnetic member includes first magnet and second magnet, first magnet is provided at one end portion of shell, second magnet is coaxially sleeved with first magnet inner side and is fixedly connected with first magnet, and the cone is provided with the first magnet. One end portion of the voice coil extends between the first magnet and the second magnet. The inner side and the outer side of the voice coil are respectively provided with one magnet, double magnetic circuits can be formed in the same loudspeaker space, compared with a conventional single magnet, the double-magnetic-circuit loudspeaker can generate larger magnetic field intensity when acting with the voice coil under the same condition, larger ampere force is formed to act on the voice coil, the cone is driven to generate larger amplitude, the sound loudness is improved, and the sound quality is improved. And the magnetic field can be relatively more uniform and stable through the washer, so that the fidelity of sound is improved to the greatest extent, and the sound effect quality of the loudspeaker is improved.

The application discloses a high-sensitivity hot cathode ionization gauge which can be used in a strong magnetic field environment and has a lower lower limit of measurement, and the hot cathode ionization gauge mainly comprises a cathode filament, an anode grid, an ion collecting electrode and a metal shell; wherein the cathode filament is a spiral thick filament structure and is used for resisting the Ampere force in the strong magnetic field; the anode grid is a spiral structure or a cage structure, which comprises a left anode grid and a right anode grid and is symmetrically arranged with the cathode filament as the center; the ion collecting electrode is a metal filament structure, which comprises a left ion collecting electrode and a right ion collecting electrode; the metal shell is a cylindrical structure, and the electric potential of the metal shell is arranged to be grounded; the cathode filament, the anode grid, the ion collecting electrode and the metal shell are coaxially arranged, and when working in the magnetic field environment, the electrode axis arrangement direction is parallel to the magnetic field direction. Compared with the traditional hot cathode ionization gauge used in the strong magnetic field environment, the application can effectively prolong the service life of the cathode filament, improve the sensitivity of the ionization gauge, and extend the lower limit of measurement to 10 ‑9 Pa.