1113results 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 discloses a coil part including: a lower magnetic body; primary and secondary lower patterns formed on the lower magnetic body in a spiral shape in parallel to each other; a lower insulating layer covering the primary and secondary lower patterns; primary and secondary upper patterns electrically connected to the primary and secondary lower patterns, respectively, and formed on the lower insulating layer in a spiral shape in parallel to each other to correspond to the primary and secondary lower patterns; and an upper magnetic body formed on the primary and secondary upper patterns, wherein the primary and secondary upper patterns have portions which cross the primary and secondary lower patterns on the plane, and a method of manufacturing the same.

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.

A wire harness includes a wire portion having three wires arranged in the same direction, connectors connected to both end portions of the wire portion, a middle portion installed in an intermediate position of the wire portion between the connectors, a wire-side surge reducing section provided in the wire portion, a connector-side surge reducing section provided in each of the connectors, and a middle portion-side surge reducing section provided in the middle portion.

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 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.

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.

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.

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 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.