1119results about "Transformers/inductances noise damping" patented technology

The invention discloses a transformer with functions of shock absorption, water resistance and heat dissipation. Connection, internal thread sleeve, connecting rod, slider, side plate, glass cooling pipe, second motor, fan blade and mounting plate, the present invention is provided with a shock absorption device, which can avoid the problem of damage to internal components caused by long-term operation of the transformer , To better protect the transformer, it is equipped with a first motor, a first pulley, a second pulley, a two-way screw, an internal thread sleeve and a connecting rod, so as to adjust the height of the transformer box and the ground to avoid rainwater entering the transformer box and The ground rain erodes or submerges the bottom of the transformer box, and a second motor and fan blades are provided to uniformly dissipate the electrical components in the transformer box, speed up the air circulation rate, and improve the heat dissipation effect.

An inductor includes a core made from a metallic magnetic material, a wire wound around the core, a pair of outer electrodes coupled to respective end portions of the wire, a shielding member arranged so as to cover a top face and three or more side faces of the core, and an insulating member arranged between the core and the shielding member and having thermal conductivity. The thickness of the shielding member is set by applying the electric resistivity and permeability of the shielding member and the frequency of noise desired to be shielded to an expression for determining the depth of a skin of skin effect. The thickness of the insulating member is set according to the breakdown voltage of the insulating member and the voltage with which insulation is desired to be ensured under a use environment of the inductor.

The invention relates to a Box-in device with both a sound insulation module and a fire-fighting module. The Box-in device comprises a side surface fire-fighting module and a top noise reduction module; the side surface fire-fighting module comprises four fire-fighting pipeline modules which are embedded into the two sides, close to a converter transformer, of a firewall in a symmetrical manner; the four fire-fighting pipeline modules are an active oil discharge pipeline module, a water spraying pipeline module, a foam pipeline module and a compressed air foam pipeline module respectively; thetop noise reduction module is a sound absorption and insulation board arranged on the top; the sound absorption and insulation board is divided into an explosion venting and falling sound insulationboard and a fixed sound insulation board according to areas; the explosion venting and falling sound insulation board is made of a high-temperature hot-melt material and can automatically fall off when a fire breaks out; and the fixed sound insulation board adopts a filled sound insulation board, and a supporting steel structure is installed below the fixed sound insulation board for supporting. For the Box-in device, the noise reduction and sound insulation boards on the top of the Box-in device and fire-fighting pipelines arranged on the side surface of the converter transformer are subjected to modular integration for synergistic effect, namely, excellent sound insulation performance of the Box-in device and the safety of operation of the converter transformer are both ensured.

The invention discloses a transformer installation supporting seat, and belongs to the technical field of electric engineering. The transformer installation supporting seat comprises a base, a damping device is fixedly connected at the bottom of the inner wall of the base, a buffering column is fixedly connected at the top of the damping device, one end of the buffering column far away from the damping device penetrates the top of the base and extends outside the base, a bearing frame is arranged on the surface of one end of the buffering column positioned outside the base, one end of the buffering column positioned in the bearing frame is fixedly connected with a first spring, one end of the first spring far away from the buffering column is fixed connected with the top of the inner wall of the bearing frame, and vertical rods are fixedly connected on the two sides of the top of the base. According to the transformer installation supporting seat, damping of a transformer is achieved, damage of the transformer is prevented, the service life of the transformer is prolonged, offset of the transformer in the use process is prevented, falling off of the transformer is avoided, the transformer is more comprehensively protected, and the supporting seat is good in use effect.

The present invention provides an inductor which has a noise inhibition effect based on a shielding part, guarantees the insulativity and the heat radiation performance between the shielding part anda core body of the inductor and can be made miniature. The inductor (1) comprises the core body (10) made of a metallic magnetic material, a wire wound around the core body, a pair of outer electrodes(12, 13) coupled to respective end portions of the core body, the shielding part 14 arranged so as to cover a top face and three or more side faces of the core body, and an insulating member 15 arranged between the core body and the shielding part and having the thermal conductivity. The thickness of the shielding member is set by applying the electric resistivity and permeability of the shielding part and the frequency of noise desired to be shielded to an expression for determining the depth of a skin of skin effect. The thickness of the insulating member is set according to the breakdown voltage of the insulating member and the voltage with which insulation is desired to be ensured under a use environment of the inductor.

A ventilating and noise-reducing apparatus for an indoor transformer is disclosed. The ventilating and noise-reducing apparatus comprises a ventilating louver and an axial flow fan used for performing ventilation and thermal dissipation to ensure a safe and stable operation of the indoor transformer, a multi-channel active control system used for the ventilating louver and mounted on the exterior of the ventilating louver, and a single-channel or multi-channel active control system used for the axial flow fan and mounted on the exterior of the axial flow fan. Due to the ventilating louver and the axial flow fan, the ventilation and thermal dissipation of the indoor transformer are ensured; and meanwhile, due to the active control systems, noise generated by the indoor transformer is restrained from radiating to the outside from the ventilating and thermal dissipating channels.

An inductance device comprises a drum core having a center core, and flanges integrated therewith. The center core is wound with a wire, whereas a magnetic gap is formed between the upper flange and lower flange. The magnetic gap is closed with an insulator, mixed with a magnetic substance, having rubber elasticity. The insulator comprises an overhang and an insertion integrally formed therewith. The overhang presses a region in the upper flange so as to hang from this region. The insertion tightly fits into the magnetic gap.

The invention relates to the technical field of electrical equipment, in particular to a low-noise dry-type transformer. Three windings are installed in parallel at the upper ends of installing bases, an upper clamping part and a lower clamping part are arranged at the upper end and the lower end of each winding respectively, and cooling fans are installed inside the lower clamping parts. Low-voltage outgoing line copper bars and high-voltage terminals are installed on the upper clamping parts, high-voltage tapping points are arranged on the front sides of the windings, and the high-voltage terminals are connected with the windings through high-voltage connecting rods. Multiple sets of shock absorbers are fixedly installed at the lower ends of the installing bases through bolt assemblies, iron plates are fixedly installed at the lower ends of the shock absorbers, and rubber shock absorption cushion blocks are fixedly installed at the lower ends of the iron plates. The low-noise dry-type transformer is novel in design and simple in structure; because the shock absorbers are installed at the bottom of the transformer, shocks generated by the transformer in the operation process are counteracted, then noise is eliminated, the service life of the transformer is prolonged, and the failure rate is decreased.

A noise filter includes a magnetic conduction housing and a pair of coils. The magnetic conduction housing has a main body and a magnetic conduction position. The main body is hollow. The magnetic conduction position is connected with the main body to divide the main body into two parts. The coils are wound around the main body. In addition, the manufacturing method of the noise filter is also provided.

The invention relates to a new technology for the noise treatment of a large-sized converter transformer by using a firewall and a valve wall at two sides of the converter transformer to carry out closed acoustic treatment to a main body of the transformer. The main body of the transformer is placed in a 'BOX'. In order to provide convenience for examining and repairing equipment, a self supporting sound insulation and absorption compound structure is adopted in both a 'BOX-IN' front board and a 'BOX-IN' top board. As partial sound insulation and absorption boards and steel frames can not be disassembled, all nodes are connected by bolts, thus being assembled and disassembled rapidly. All parts are manufactured by molding, do not require cutting on site and have high processing and reusing rate.

The invention discloses an oil storage circulating cooling system of an oil-immersed transformer. The system comprises an oil tank, an oil pump, an oil storage tank, a water tank, a reservoir, a first heat dissipation pipe, a second heat dissipation pipe, a water inlet pipeline, a drain pipeline, a water spray pipeline, a water pump, a draught fan, a cooling frame, a temperature sensor and a controller, one end of the first heat dissipation pipe is connected with an oil outlet of the oil tank through the oil pump, the other end of the first heat dissipation pipe communicates with an oil inlet of the oil storage tank, one end of the second heat dissipation pipe is connected with the oil outlet of the oil storage tank, the other end of the second heat dissipation pipe communicates with the oil inlet of the oil tank, the oil storage tank is arranged in the water tank, a water inlet and a water spray opening are formed in one side face of the water tank, a water spray opening is formed in the other side face of the water tank, an outfall is formed in the bottom of the water tank, one end of the water inlet pipeline is connected with the water inlet, the other end of the water inlet pipeline communicates with the reservoir, one end of the drain pipeline communicates with the outfall through the water pump, and the other end of the drain pipeline communicates with the reservoir. The oil storage circulating cooling system disclosed by the invention has the advantages of simple structure, graded heat dissipation and improved heat dissipation effect of the cooling system.

The noise suppression method of individual active noise reduction system comprises the steps that: (1) initial noise digital signals are received and converted to serve as input signals of a BP neural network; (2) the input signals are processed to generate secondary digital signals; (3) the secondary digital signals are output to a loudspeaker and secondary noise is generated; (4) remained noise digital signals obtained by overlapping the initial noise and the secondary noise are received; whether remained noise digital signals is continuously constant for the set times is judged; if yes, the secondary digital signals are kept outputting; (5) if not, BP neural network parameters are optimized and adjusted with the amplitude of the remained noise digital signals being minimum as the optimality principle; remained noise digital signals of previous step are served as new input signals and the step (2) is executed again.

A device for reducing a magnetic unidirectional flux fraction in the core of a transformer is provided. The device has a measuring device that provides a sensor signal corresponding to the magnetic unidirectional flux fraction, a compensation winding that is magnetically coupled to the core of the transformer, a switching unit arranged electrically in a current path in series with the compensation winding in order to feed a current into the compensation winding. The action of the current is directed opposite to the unidirectional flux fraction. The switching unit can be controlled by a regulating variable provided by a control device and can be switched into a conductive state during a predefined time interval and in accordance with the regulating variable, the switch-on time being mains-synchronous. A device for limiting the current in the current path is provided and the sensor signal is fed to the control device.

The invention discloses a transformer denoising device which comprises a transformer chamber wall body, a ceramic noise-absorbing plate and noise-absorbing wedges. The ceramic noise-absorbing plate is fixed on the wall body to form a noise insulating wall, and each noise-absorbing wedge is hung on the ceramic noise-absorbing plate and provided with a metal net frame and a porous noise-absorbing material filled in the metal net frame. The transformer denoising device is light in weight, simple in structure, convenient to mount, low in manufacturing cost and durable. A special structure of the noise-absorbing wedges and noise-absorbing effect of porous foam metal are utilized, and the noise insulating wall formed by the ceramic noise-absorbing plate is utilized, so that noise in a transformer chamber can be lowered by 20-30dB.

The invention provides a planar transformer, a power switching circuit, and an adapter, capable of improving noise suppression performance. The planar transformer comprises a primary winding includinga first primary winding layer, a secondary winding including a first secondary winding layer, and a charge balance winding. The first secondary winding layer is provided with Ns1th turns to (Ns1+B1-1)th turns coils of the secondary winding. The charge balance winding comprises a first charge balance winding layer which is arranged between the first primary winding layer and the first secondary winding layer and is adjacent to the first primary winding layer and the first secondary winding layer. A first charge balance winding layer is provided with N1 turns of coils, wherein N1 is larger thanor equal to Nb1. When the planar transformer works, an average value of first induction voltage generated by the Nb1 turns of coils is equal to the average value of second induction voltage generatedby the first secondary winding layer, wherein N1 and Nb1 are positive number.

The invention relates to a nuclear spin tomographic radiography method (synonym: magnetic resonance imaging method, that is MRT) which is used for patient diagnosis in medicine. The invention especially relates to a nuclear spin tomographic radiography device to reduce vibration of components which constitute a magnetic resonance imaging equipment and reduce propagating paths of noise. This magnetic resonance imaging equipment includes a static magnetic field magnet (1), enclosed by a magnet container (12) for enclosing and bordering an inner space (21) and an inclined magnetic field coil system (2) disposed in this inner space (21). Silencing laminated plate structures (A-E-B, C-E-D) is provided on the inside surface (14) of the magnet container (12) for bordering this inner space (21). Consequently, acoustic vibrations, generated when the inclined magnetic coil system (2) is switched, are absorbed.

The invention discloses a shock-absorbing transformer mounting rack which comprises a first mounting base, a second mounting base and a third mounting base; two first mounting grooves formed in parallel are formed in the top surface of the first mounting base; a first slide rod is arranged in each first mounting groove and is fixedly connected with the first mounting base; two first slide blocks are sheathed on each first slide rod; first shock-absorbing springs are arranged on the first slide rods between the two first slide blocks and between the first slide rods and the first mounting grooves in a sleeving manner. The shock-absorbing transformer mounting rack adopts a structure that the slide blocks, connecting rods and the shock-absorbing springs are combined; due to the adoption of omni-directional shock absorption from six spaces, up, down, left, right, front and rear acting forces generated by shock when a transformer works are completely offset, so that a good shock-absorbing effect when the transformer works is achieved, and the problem that the people's work and life are negatively affected when the transformer works is solved.

A harmonic cancelling interphase magnetic device (1) comprising a magnetic core of rectangular shape with three wound legs (14) and two non-wound legs (12), wherein the cross-section of said non-wound legs (12) is thinner than the cross-section of said wound legs (14). The magnetic device is designed for a front end multi-pulse rectifier or inverter. Its use enables reduction of the harmonics of the currents absorbed or injected to three-phase power line. Compare to known solutions, cost, material and dimensions of the magnetic device are significantly reduced.

The invention belongs to the technical field of active noise reduction, and discloses a distribution transformer running noise active noise reduction system. The key problem above control over the running noise of a distribution transformer is solved. The system is mainly technically characterized in that running state signals in a distributor transformer running in a power distribution cabinet are collected through a noise microphone, a vibration sensor, a voltage and current sensor and the like, analog signals are converted into digital signals, the running noise spectrum of the distribution transformer is recognized on line through signal amplification and sampling, control signals are formed through an active noise control algorithm, the digital signals are converted into analog signals, a control sound source is driven to produce sounds or a vibrator is motivated to vibrate through a power amplifying circuit, and the purpose of eliminating the control sound source and distribution transformer running noise at the same time is achieved by overlaying the control sound source and distribution transformer running noise. The system has the remarkable advantages of eliminating distribution transformer running noise through the active noise reduction technology, and being capable of being widely applied in building power distribution rooms and the like.

A coil apparatus having a divided winding conformation and a manufacturing method of the coil apparatus which can prevent a winding from collapsing while achieving a reduction in size of a core and simplification of a structure. A coil apparatus includes a ferrite core and a coil provided around the core. The coil includes at least a first coil portion and a second coil portion, and a boundary end surface of the first coil portion on the second coil portion side is inclined in such a manner that its inner peripheral side is closer to the second coil portion than its outer peripheral side. Further, a boundary end surface of the second coil portion on the first coil portion side is inclined in such a manner that its outer peripheral side is closer to the first coil portion than its inner peripheral side.

The transformer includes: first and second cores each including a magnetic center leg and a magnetic outer leg positioned outside of the magnetic center leg; a first adhesion part that adheres the magnetic center leg of the first core and the magnetic center leg of the second core to each other; a second adhesion part that adheres the magnetic outer leg of the first core and the magnetic outer leg of the second core to each other; a bobbin inserted through the magnetic center leg of the first core and the magnetic center leg of the second core, a primary coil and a secondary coil being wound on the bobbin; and an elastic member that applies pressure to the magnetic outer leg of the first core and the magnetic outer leg of the second core in a neighborhood of the second adhesion part, in an inward direction of the transformer.

A connector has an inner housing with a cavity for housing a terminal fitting, an outer housing assembled displaceably to the inner housing and a rubber plug. The rubber plug has a sealing portion, a vibration reducing portion and a vibration absorbing portion. The sealing portion is mounted fixedly on a rear end portion of the terminal fitting and is brought into close contact with an inner peripheral surface of the cavity. The vibration reducing portion is fit in a holding hole formed in the outer housing and thus is displaced with the outer housing. The vibration absorbing portion has a smaller thickness than the vibration reducing portion and connects the sealing portion to the vibration reducing portion. The vibration absorbing portion is outside the holding hole and in front of the holding hole.

The invention provides noise reduction equipment for a transformer. The noise reduction equipment for the transformer comprises a cover, a noise reduction material and the transformer, wherein the noise reduction material is arranged on the outer wall surface and / or the inner wall surface of the cover; and the cover covers the transformer. Because the cover covers the transformer and is provided with the noise reduction material, the noise reduction material absorbs noises, the noises generated by the transformer can be reduced effectively and are stored in the cover, noise transmission is avoided effectively, the working mute property of the transformer is improved, and noise pollution is reduced. Moreover, the noise reduction equipment for the transformer has the advantages of simple structure, convenience in operation and low manufacturing cost.

The invention discloses an anti-theft noise reduction transformer with a cooling function, which comprises a main shell, wherein the main shell is internally provided with a square cavity, the squarecavity is internally provided with a voltage transformation box, the periphery of the voltage transformation box is fixedly provided with a sound insulation layer, the voltage transformation box is internally provided with a voltage transformation cavity, the voltage transformation cavity is internally equipped with an iron core, the periphery of the iron core is wound with a first wire and a second wire, the upper side surface of the sound insulation layer is fixedly provided with two groups of bilaterally symmetrical electrical conduction columns, and the first wire and the second wire are respectively in telecommunication connection with the two groups of electrical conduction columns. According to the invention, the noise of the outdoor large-scale transformer can be effectively reduced, and the transformer is provided with a cooling system, so that the transformer is enabled to still work normally in hot summer, the risk of being damaged due to the overhigh temperature is reduced,and the occurrence rate of an event that the transformer is damaged and stolen can also be effectively reduced.

The present invention provides a chip electronic component and a manufacturing method thereof, more specifically a chip electronic component having an inner coil structure capable of preventing short circuit between the coil portions by increasing the thickness of the coil relative to the width of the coil and implementing a high aspect ratio (AR), and a manufacturing method thereof.

An iron-based amorphous alloy and magnetic core with an iron-based amorphous alloy having a chemical composition with a formula FeaBbSicCd, where 80<a<=84, 8<=b<=18, 0<c<=5 and 0<d<=3, numbers being in atomic percent, with incidental impurities, simultaneously having a value of a saturation magnetic induction exceeding 1.6 tesla, a Curie temperature of at least 300° C. and a crystallization temperature of at least 350 ° C. When cast in a ribbon form, such an amorphous metal alloy is ductile and thermally stable, and is suitable for various electric devices because of high magnetic stability at such devices' operating temperatures.

The invention provides a power transformer noise control method based on an inverse control technology. The power transformer noise control method based on the inverse control technology comprises the steps that noise signals generated by a noise source of a power transformer are collected through a primary sensor and are regarded as reference signals of a control system; error signals generated through the superposition of noise reduction signals and the noise signals are collected through an error sensor; the control system establishes a secondary sound channel model for a secondary sound channel through an adaptive modeler according to the error signals, simulates the process that the noise reduction signals generated by a secondary noise reduction source are transmitted in space and obtains sound signals of a simulation secondary sound source; the control system carries out inverse modeling on the secondary sound channel through the adaptive modeler according to the error signals, and the secondary sound channel is connected with the secondary sound channel model in series in the control system; the sound signals equal to the reference signals in amplitude are obtained through calculation, and inverting processing is carried out on the sound signals to obtain control signals controlling the secondary noise reduction source; the noise reduction signals are output according to the control signals. The power transformer noise control method based on the inverse control technology can effectively control low-frequency noise of power transformers.