4090results about "Transformers/inductances cooling" patented technology

The present invention provides for a cooling system for circulating a coolant to cool the patient bore. In one embodiment, that patient bore consists of two concentric cylinders separated by spacers running either longitudinally or helically. In another embodiment of the present invention, fluid may be passed either helically or longitudinally through tubes bonded to the outer diameter of the patient bore such that the parts of the bore that are exposed to the patient are directly cooled. In a third embodiment, the RF coil could form part of the patient bore, with the helical or longitudinal fluid channels surrounding the patient bore.

To provide coil units, electronic instruments and the like, which can radiate heat generated in a coil into a space outside a protective member, while the number of components does not increase.

A coil unit 100 has a coil 110, and a protective member 120 that contacts a transmission surface of the coil 110 and covers at least the side of the transmission surface of the coil 110. The protective member 120 is composed of a resin material with an inorganic material added therein. The protective member 120 is also used as a heat radiation plate that dissipates heat generated in the coil 110 and radiates the heat.

A superconducting system comprises a superconducting coil (3) mounted in a support (12). The coil is surrounded by a cryogen chamber (17) which is located radially outwardly from the coil (3) on the other side of the support (12). The cryogen chamber is in fluid communication with a cryogen recondensing unit (33) whereby vaporized cryogen may flow from the cryogen chamber (17) to the cryogen recondensing unit (33) to be recondensed in use before returning to the cryogen chamber. Thermally conductive means (25) is arranged to facilitate heat transfer from the superconducting coil (3) to the cryogen chamber (17) to vaporize cryogen contained therein in use and thereby remove heat from the coil. The thermally conductive means (25) is highly thermally conductive at cryogenic temperatures. In use, the highly thermally conductive means (25) facilitates transfer of heat from the coil (3) to the interior of the cryogen chamber (17) to vaporize cryogen located therein. A thermal conduction path is therefore used to transfer heat from the coil to the cryogen in the cryogen chamber. Cryogen vaporized in the cryogen chamber then flows to the cryogen recondensing unit (33) to be recondensed before returning to the chamber, while the vaporized cryogen acts as the heat transfer medium over the longer distance between the cryogen chamber and the recondensing unit.

A system (27) for reducing the temperature of cooling oil for a power transformer (12) includes a heat exchanger (44) interposed in the cooling oil system. The heat exchanger (44) relies upon a liquid-to-liquid exchange of heat from the heated oil to a coolant flowing through the heat exchanger. In one embodiment, the coolant provided to the heat exchanger is obtained from an absorption chiller (65). Heat energy is provided to the chiller (65) from a heat storage device (80). In a specific embodiment, the heat storage source (80) can be a phase change material device. In a preferred cooling system, a programmable controller (55) determines the activation and operation of the system. The controller (55) can sense transformer or cooling oil temperature to trigger activation. In a preferred embodiment, the controller (55) compares a current temperature history against a temperature profile to anticipate increased cooling requirements. In certain embodiment, excess, off-peak or waste heat from the transformer (12) itself is provided to the heat storage device (80) or to the phase change heat exchanger.

The invention discloses an intelligent control method and an intelligent control device of a transformer cooling system. The method comprises the following steps: detecting the cooling oil temperature and the load current value of the upper layer and the lower layer of a transformer; determining the group number, the table number and the time of a start/ stop cooler; starting/ stopping at least one oil pump; starting/ stopping at least one fan in a delay mode; detecting the current of the oil pump and the fan; entering a device debug mode; and recording events. The device comprises a DSP and ARM double-core hardware platform, wherein a DSP plate comprises a cooling oil temperature data acquisition and analysis module, an oil pump motor current data acquisition and processing module, an oil pump motor control module, a fan motor current data acquisition and processing module and a fan motor control module; and the ARM plate comprises a user interface, a communication module and a data storage module. The invention combines control, relay protection, real-time monitoring and diagnosis as a whole, has more intelligent on-line real-time control, can define and configure the parameter of the transformer cooling system, improves the production efficiency and saves the operation and maintenance cost of the transformer.

A dry-type, resin-encapsulated transformer coil that includes multiple layers formed from a length of conductive material, and multiple cooling ducts that are formed of thermoplastic material and spaced between the layers of conductive material. The thermoplastic material forming the cooling ducts and the resin that encapsulates the multiple layers of conductive material are thermally and electrically compatible.

A planar transformer comprises a primary coil board including a primary coil, a secondary coil board including a secondary coil, a heat sink integrally having a spacer portions and a magnetic core assembly mounted to the primary coil board and the secondary coil board. The spacer portion is inserted into a gap between and facing the primary coil board and the secondary coil board and at least a surface of the heat sink is electrical insulating.

Multiple parallel conductor for an electrical machine and process. The conductor includes a plurality of adjacent subconductors combined to form a subconductor bundle having an outer surface with a plurality of contiguous surface sections arranged in a longitudinal direction, and a flat protective insulation covering at least one of the plurality of surface sections. At least one of the plurality of surface sections remains uncovered by the flat protective insulation covering. A mesh sheathing further covers the plurality of surface sections.

A transformer for low frequency applications of from 50 Hz to 1000 Hz is described. The transformer comprises a core having a cylindrical symmetry around a main revolution axis. The core is formed of a soft isotropic magnetic composite material composed of iron and resin. Windings are enclosed in the magnetic core and disposed about a central column of the magnetic core and magnetically coupled with the inductor for low frequency applications, DC to 1000 Hz of similar construction is also described, the inductor comprises a core having a cylindrical symmetry around a main revolution axis. The core is formed of a soft isotropic magnetic composite material composed of iron and resin. Winding is enclosed in the magnetic core and disposed about a central column of the magnetic core and magnetically coupled with the magnetic core. The core is formed by core sections.

A transformer is disclosed that includes a housing having a core-winding assembly positioned therein that is immersed in a dielectric transformer fluid contained within the housing. A cooling system is provided to cool the dielectric transformer fluid contained within the housing and includes a closed-loop fluid path having a quantity of dielectric cooling fluid that is circulated there through and that is maintained separate from the dielectric transformer fluid. A liquid-to-liquid heat exchanger is positioned along the closed-loop fluid path and within the housing so as to be immersed within the dielectric transformer fluid, with the liquid-to-liquid heat exchanger cooling the dielectric transformer fluid based on a liquid-to-liquid transfer of heat energy between the dielectric cooling fluid and the dielectric transformer fluid. The cooling system also includes a heat dissipation system positioned remotely from the liquid-to-liquid heat exchanger to cool the dielectric cooling fluid circulating through the closed-loop fluid path.

A coil substrate structure which enhances heat dissipation and fully secures a mounting area is provided. A coil substrate structure 100 comprises a first coil substrate 110 having a primary transformer coil part 41; a second coil substrate 120, disposed on the first coil substrate 110, having a secondary transformer coil part 42; and a transformer core 130 for magnetically connecting the transformer coil parts 41, 42 to each other. The coil substrates 110, 120 are disposed on each other while being shifted from each other such that the transformer coil parts 41, 42 overlap each other as seen in the substrate thickness direction. This can increase the heat dissipation area of the coil substrates 110, 120. The transformer coil parts 41, 42 have a width in a transmission direction A narrower than a width in a direction B intersecting the transmission direction A as seen in the substrate thickness direction. This can reduce the multilayer area of the coil substrates 110, 120 in the transmission direction A.

A transformer is provided. The transformer includes a first electrical conductor, a second electrical conductor, a circuit board and a core set. The first electrical conductor has a through hole and the second electrical conductor is electromagnetically coupled with the first electrical conductor and includes a plurality of spiral coils formed by winding a single conductive wire, each spiral coil having a through hole. The circuit board has a through hole. The core set penetrates the through hole of the first electrical conductor, the through hole of the circuit board, and the through holes of the plurality of spiral coils of the second electrical conductor, and covers at least one portion of the first electrical conductor and the second electrical conductor.

A transformer assembly includes a transformer having a winding, a thermal sensor in thermal communication with the transformer winding, and an airflow generator in signal communication with the thermal sensor and arranged for fluid communication with the transformer winding. The airflow generator is responsive to the thermal sensor to direct an airflow toward the transformer winding in response to a temperature at the winding.

A subsea electrical power distribution system including a first chamber (20) housing a transformer, a second chamber (30) housing a power distribution system with busbars (32) for distribution of power to individual consumers connected to said busbars via connectors (33). The interface between the first and second chamber includes a flexible membrane (22) allowing the oil in the first chamber to expand into the second chamber and vice versa. The second chamber being connected to an external volume expansion chamber (34) allowing the pressure in the second chamber to balance against the pressure of the ambient sea.

A small footprint power transformer constructed so as to exhibit improved heat dissipation characteristics and an enhanced flow of a cooling medium. The transformer construction achieves small footprint by superimposing the core legs with the windings in vertical relationship. Highly heat conductive plane dissipators are inserted between adjacent finished coil discs and extended beyond the winding structure, terminating in fins arranged to assure maximum heat transfer to a cooling medium flowing therepast resulting in substantial reduction of the temperature rise.

The invention provides a kind of environment-friendly transformer oil and the preparation method. The invention takes vegetable oil and the leftovers thereof as the materials, and is prepared after alkali refining, dehydration, esterifying alcoholysis, stopping neutralization, washing and refining, decompression and distillation, decolorization filtration; and after mixing 0.1-5.0 wt percent antioxidant and 0.1-5.0 wt percent pour inhibitor in. The high-grade fatty acid monoester content is 5-95 wt percent; the mono-substituted disubstituted, trisubstituted high-grade fatty acid glyceride contents are 5-95 percent. The appearance of the environment-friendly transformer oil is light-yellow transparent liquid, the kinematic viscosity at 50 DEG C is 2-8mm2/s, the breakdown tension is 40-90KV/2.5mm, and the specific inductive capacity is 2.3-3.2. The environment-friendly transformer oil does not contain sulfur, is innoxious, has high natural decomposability, and can reduce environmental pollution.

The invention relates to an on-line monitoring oil-gas separation device for a transformer, and belongs to the technical field of power engineering. The device comprises an oil-gas separation chamber, a vacuum pump, an ultrasonic vibrator, a scavenge oil pump, a PLC control module, an electromagnetic valve, a liquid level detector, an oil-gas filter, a throttle valve and a connecting pipe. All electric parts are controlled by the PLC module to cooperate with each other to work in real time. The device utilizes a method of combining the vacuum pumping and the sonic oscillation principle for the oil-gas separation, so that the degassing efficiency is higher and the degassing process is faster; and moreover, the device also has the advantages of high automaticity, small volume and convenient arrangement, and is quite suitable for detecting faults based on dissolved gas in the oil of oil immersed type equipment such as a transformer and the like.

Systems and methods that allow for weight and size reduction of electronics components, such as transformer rectifier units (TRUs) or autotransformer rectifier units (ATRUs), by providing a fluid cooling system is utilized to provide high heat dissipation for a transformer assembly of TRUs or ATRUs by providing a thermal interface at the windings of the transformer assembly, which are the hottest spots in such assemblies. The cooling system may include a fluid-cooled winding heat sink element or “finger,” which may be a thermally conductive bar (e.g., aluminum, copper) having microchannels therein positioned between the core and windings of a transformer or between turns of the windings of a transformer. Fluid passes through the microchannels of the heat sink element to provide direct cooling to the heat generating windings of the transformers. The heat sink element may be produced by an additive manufacturing technology.

A device for preventing the explosion of an electric transformer equipped with a tank filled with combustible coolant fluid, includes a pressure relief element to decompress the tank, a reservoir arranged downstream of the pressure relief element and at least one stopper valve on the reservoir such that the reservoir is hermetic in order to collect a fluid that passes through the pressure relief element.

A radiation fin stepped type radiator belongs to the technical field of transformer accessories. The radiation fin stepped type radiator comprises an oil inlet tube, an oil return tube and a set of radiation fins which are adapted between the oil inlet tube and the oil return tube and used for leading hot oil led in by the oil inlet tube to the oil return tube after heat dissipation of the hot oil; the oil inlet tube comprises a horizontal tube section and an inclined tube section, the inclined tube section is formed by bending the horizontal tube section, the radiation fins comprise parallel radiation fins arranged in parallel and stepped radiation fins arranged in stepped shape; the parallel radiation fins are adapted between the horizontal tube section and one end of the oil return tube, and the stepped radiation fins are adapted between the inclined tube section and the other end of the oil return tube, wherein, the horizontal tube section is a tube section with an oil inlet, while the inclined tube section is a tube section far from the oil inlet. The radiation fin stepped type radiator has the advantages of embodying the effects of uniform flow distribution and balanced heat dissipation, and the material can be saved by application of the stepped radiation fins.

A lightweight inductor for the motor controller of an aircraft starter includes a toroidal inductor core divided into multiple sections that are separated by a thermally conductive, but electrically insulating, material. The inductor core is wound with wire and positioned inside of an electrically and thermally conductive container, which acts as a heat sink and EMI shield, while also reducing eddy currents within the inductor core.

A power electronics assembly is provided. The assembly includes a housing defining at least one cavity and having a fluid passageway extending therethrough, the fluid passageway having first and second portions on respective first and second opposing sides of the at least one cavity, and a plurality of inductors housed within the at least one cavity of the housing such that the first and second portions of the fluid passageway are on first and second opposing sides of each of the plurality of inductors.

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.

A coil unit includes a planar coil, a printed circuit board that includes a planar coil placement section that receives the planar coil, a protective sheet that is provided on a transmission side of the planar coil and protects the planar coil, and a magnetic sheet that is provided on a non-transmission side of the planar coil. The planar coil is placed in the planar coil placement section and is electrically connected to the printed circuit board. The planar coil placement section has a shape that corresponds to an external shape of the planar coil.

In an embodiment, a drive system includes a transformer enclosed in an enclosure including a heat exchanger to cool a fluid medium. In addition, the system includes a plurality of power cubes each including a rectifier, a DC-link, and an inverter. Each power cube may include a plurality of cold plates each coupled to a corresponding switching device of the inverter, an inlet port in communication with a first one of the plurality of cold plates and an outlet port in communication with a last one of the plurality of cold plates. In turn, a manifold assembly is to couple at least the power cubes to enable two phase cooling of the power cubes and the transformer via one or more heat exchangers.

Electric motor components are formed of a conductive loaded resin-based material. The conductive loaded resin-based material comprises micron conductive powder(s), conductive fiber(s), or a combination of conductive powder and conductive fibers in a base resin host. The percentage by weight of the conductive powder(s), conductive fiber(s), or a combination thereof is between about 20% and 50% of the weight of the conductive loaded resin-based material. The micron conductive powders are metals or conductive non-metals or metal plated non-metals. The micron conductive fibers may be metal fiber or metal plated fiber. Further, the metal plated fiber may be formed by plating metal onto a metal fiber or by plating metal onto a non-metal fiber. Any platable fiber may be used as the core for a non-metal fiber. Superconductor metals may also be used as micron conductive fibers and/or as metal plating onto fibers in the present invention.

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.

Provided is an electrical apparatus comprising a magnetic core, a conductive coil wound around at least a part of the core, a cooling element configured to receive a cooling fluid to cool the core and the coil during operation, and at least one biasing element operatively associated with the core to urge the core and the coil into engagement with the cooling element despite differential expansion or contraction of the core and the coil and manufacturing tolerances. Further provided is a method for making an electrical apparatus comprising disposing a conductive coil wound around at least a part of a magnetic core, disposing a cooling element between the core and the coil, the cooling element configured to receive a cooling fluid to cool the core and the coil during operation, and urging the core and the coil into engagement with the cooling element despite differential expansion or contraction of the core and the coil and manufacturing tolerances.

The invention relates to a liquid nitrogen strong cooling transformer and a refrigerating method thereof. The transformer comprises a transformer oil tank and a liquid nitrogen tank; the liquid nitrogen tank is connected with a liquid nitrogen outlet pipe; the transformer oil tank is connected with a gas nitrogen outlet pipe; an evaporating pipe is coiled in the transformer oil tank; one end of the evaporating pipe is communicated with the liquid nitrogen outlet pipe and the other end of the evaporating pipe is communicated with the gas nitrogen outlet pipe; the gas nitrogen outlet pipe is sequentially provided with a liquid nitrogen compressor, a condenser and a throttling valve; the tail end of the gas nitrogen outlet pipe extends into the liquid nitrogen tank; a temperature sensor is arranged in the transformer oil tank; and the liquid nitrogen outlet pipe is provided with a heat preservation electromagnetic valve electrically connected with the temperature sensor. The liquid nitrogen strong cooling transformer and the refrigerating method thereof have the beneficial effects that 1, heat exchange is carried out between liquid nitrogen and transformer oil, heat exchange efficiency is high and gas nitrogen is retransformed into liquid nitrogen by the liquid nitrogen compressor and the condenser and is recycled; and 2, the transformer oil in upper and lower cavities of the transformer oil tank is repeatedly circulated by a transformer oil circulating pipe and a circulating oil pump so as to enable the oil temperature to be balanced.

Electric motor components are formed of a conductive loaded resin-based material. The conductive loaded resin-based material comprises micron conductive powder(s), conductive fiber(s), or a combination of conductive powder and conductive fibers in a base resin host. The percentage by weight of the conductive powder(s), conductive fiber(s), or a combination thereof is between about 20% and 50% of the weight of the conductive loaded resin-based material. The micron conductive powders are metals or conductive non-metals or metal plated non-metals. The micron conductive fibers may be metal fiber or metal plated fiber. Further, the metal plated fiber may be formed by plating metal onto a metal fiber or by plating metal onto a non-metal fiber. Any platable fiber may be used as the core for a non-metal fiber. Superconductor metals may also be used as micron conductive fibers and/or as metal plating onto fibers in the present invention.