39results about "Temperature compensation" patented technology

The disclosure provides a thin film capacitor assembly and a motor controller, and belongs to the technical field of motors. The thin film capacitor assembly comprises a plurality of cooling pipes, a plurality of columns of silicon carbide single pipes and a plurality of columns of capacitor cores. The plurality of cooling pipes are arranged side by side, and a cooling channel is formed between adjacent two cooling pipes, and the cooling pipes have cooling liquid. Each column of silicon carbide single pipes is located in a cooling channel, and each column of capacitor cores is located in a cooling channel, and the silicon carbide single pipes and the capacitor cores are located in different cooling channels. In this way, the heat dissipation effect inside the thin film capacitor assembly can be better, the temperature of the thin film capacitor assembly can be prevented from being too high, and the temperature resistance of the thin film capacitor assembly can be improved.

Provided is an electronic component, and particularly a film capacitor, comprising a working element comprising a dielectric and an encasement with the working element encased in said encasement wherein the encasement comprises a phase change material.

The utility model discloses a laminated film capacitor module structure, and specifically relates to the film capacitor technology field, the laminated film capacitor module structure comprises a packaging layer, a housing assembly, a heat radiation layer and an electrode layer, the housing assembly is arranged below the packaging layer, the heat radiation layer is arranged in the packaging layer, the electrode layer is arranged below the heat radiation layer, and the electrode layer is arranged below the heat radiation layer. The device has the advantage of large capacitance, can store more electric energy, can provide stable electric energy output when a power supply fluctuates, ensures stable operation of a system, can adapt to more application scenes, can ensure the performance and stability of the system, and can be stable in a high-frequency circuit. The device has a wider application value in the field of electronic science and technology, also has the advantage of excellent heat dissipation performance, and can ensure the stable operation of the capacitor, thereby avoiding the performance reduction and fault of the capacitor caused by high temperature, and also prolonging the service life of the device.

Provided are a composite device for automotive electric parts and a manufacturing method thereof. The composite device includes: a multi-layered ceramic capacitor having a plurality of first and second internal electrodes alternately arranged; a multi-layered ceramic varistor having a plurality of third and fourth internal electrodes arranged to face each other, the multi-layered ceramic varistor being stacked on one side surface of the multi-layered ceramic capacitor; an adhesive layer made of an insulating heat dissipation ceramic adhesive for bonding the multi-layered ceramic capacitor and the multi-layered ceramic varistor; and first and second external electrodes which connect the plurality of first and second internal electrodes exposed to both end portions of the multi-layered ceramic capacitor with the plurality of third and fourth internal electrodes exposed to both end portions of the multi-layered ceramic varistor, respectively.

The present disclosure provides a capacitor capable of reducing unevenness in heat generation of a plurality of capacitor elements. The capacitor includes a first bus bar, a second bus bar, and a plurality of capacitor elements arranged in a first direction. Each of the plurality of capacitor elements includes an element body, a first electrode, and a second electrode. The first bus bar includes a first internal terminal connected to the first electrode, a first external terminal, and a first connection portion connecting the first internal terminal and the first external terminal. The first connection portion includes a side plate positioned on a side of the plurality of capacitor elements in a second direction orthogonal to the first direction. Among the plurality of capacitor elements, a capacitor element disposed farthest from the first external terminal in the first direction is disposed closest to the side plate of the first connection portion in the second direction.

The utility model discloses a power capacitor device with a built-in temperature adjusting device. The power capacitor device comprises a device shell, a circulating pump and a reciprocating power shell, the utility model relates to the technical field of capacitor equipment, and the device is specially designed for improving the operation stability of a plurality of capacitor main bodies in the device shell through the dual combination of a cooling oil cooling circulation structure and a reciprocating blowing cooling structure, and through the efficient heat dissipation system, even in a long-time operation process, the capacitor main bodies can be cooled to a certain degree. Meanwhile, heat accumulation can be effectively prevented, it is ensured that the working efficiency cannot be reduced due to overheating of the capacitor body, the potential risk possibly causing production accidents is fundamentally eliminated through the design, the operation of the power capacitor is more stable and reliable, and the safety is greatly improved.

The invention is applied to the technical field of capacitors, and discloses a power capacitor which comprises a base, a shell is arranged on the upper surface of the base, a core bag is arranged in the shell, the upper end of the core bag penetrates through the upper surface of the shell and is fixedly provided with a terminal, and an emergency cooling mechanism is arranged in the shell. And when the capacitor is overheated, the capacitor is rapidly and emergently cooled in an automatic triggering manner, so that the capacitor is prevented from being overheated and burnt. According to the power capacitor, when the capacitor is overheated, ammonium salt in the filling cavity is mixed with water in the storage plate to absorb heat of the surrounding environment, so that the effect of reducing the temperature is achieved, and the heat is conducted into the pressure cavity through the heat conduction rod to enable gas to expand; the expanded gas can enable the overflow hole to be aligned with the end part conduction hole and enable the central conduction hole to be aligned with the upper end of the overflow pipe in a manner of pushing the piston rod to slide, so that water can be automatically discharged to realize mixed reaction with ammonium salt.

The utility model discloses a capacitor, which enables a heat dissipation piece to be exposed outside resin to realize contact cooling with an external cooling source, the external cooling source can be directly contacted with a heating source of the capacitor, the cooling effect is remarkable, and the capacitor comprises a capacitor shell, the resin, a capacitor core, a first busbar, a second busbar and the heat dissipation piece, the accommodating cavity of the capacitor shell is filled with resin; the capacitor core is arranged in the accommodating cavity and is embedded in the resin; the first parts of the first busbar and the second busbar are arranged in the accommodating cavity, are embedded in the resin and are electrically connected with the upper surface and the lower surface of the capacitor core respectively; the second parts of the two are exposed out of the resin and are led to the side edge of the capacitor shell to serve as connecting terminals; the heat dissipation piece comprises an exposed part exposed out of the resin and a buried part buried in the resin; the exposed part is in direct contact with an external cooling source, and the buried part is fixedly connected with the first part of the first busbar; in a plan view, only part of the exposed part is overlapped with the capacitor core, and the rest part is closer to the connecting terminal of the first busbar.

In described examples, a heated capacitor (100) removes moisture from a moisture-sensitive insulating layer (114) of the heated capacitor (100) that lies between and touches a lower metal plate (112) and an upper metal plate (116) of the heated capacitor (100) with the heat that is generated by the resistance to a current that passes through or near the heated capacitor (100).

The present invention relates to the technical field of ceramic capacitors, and particularly relates to a composite ceramic capacitor with a positive temperature coefficient, which includes a high-voltage conductive rod. The high-voltage conductive rod has a cylindrical structure, and a support flange is coaxially installed on the outer side of the high-voltage conductive rod. Ceramic capacitor elements are installed in parallel on the support flange. By installing ceramic capacitor elements in parallel on the support flange outside the high-voltage conductive rod, the present invention significantly reduces the overall temperature coefficient of the composite ceramic capacitor while improving the strength of the composite ceramic capacitor.

A multilayer ceramic electronic component includes a ceramic body having a plurality of dielectric layers and a plurality of internal electrodes disposed with the dielectric layers interposed therebetween. An external electrode is disposed on the outside of the ceramic body. A coating layer is formed on at least a portion of an outer surface of the ceramic body and includes a water-repellent coating agent and at least one of a heat stabilizer that removes free radicals generated from the water-repellent coating agent, and an antioxidant that decomposes a free radical forming factor. The coating layer improves moisture resistance reliability and durability of the component during thermal and environmental stress.

The invention relates to an intermediate circuit capacitor for a power electronic assembly, comprising: at least one capacitor element which is designed to store an electrical charge in an electric field; a first distribution element having a first transistor connection, a first battery connection and a first contact plate, the first contact plate electrically contacting the capacitor element on a first side; and a second distribution element having a second transistor connection, a second battery connection and a second contact plate, the second contact plate electrically contacting the capacitor element on a second side, the first contact plate and the second contact plate being oriented parallel to each other, the first contact plate being arranged in the first side, and the second contact plate being arranged in the second side. The first battery terminal is connected to the first contact plate by means of a first connection section.

A capacitor device (5) includes a capacitor (30), a capacitor bus bar (29), and a heat dissipation bus bar (26). The capacitor bus bar (29) has a first end electrically connected to the capacitor and a second end electrically connected to an electrical component, and extends in the direction in which the capacitor and the electrical component are aligned. The heat dissipation bus bar (26) has an end portion disposed on the capacitor bus bar without the end portion interrupting the capacitor bus bar in the extending direction of the capacitor bus bar, and dissipates heat from the capacitor. Therefore, it is possible to suppress an increase in the inductance of the capacitor bus bar while improving the heat dissipation performance of the capacitor.

To provide a capacitor which can reduce variation in heat generated by a plurality of capacitor elements.SOLUTION: A capacitor 1 comprises: a plurality of capacitor elements 2 aligned in one direction; a first bus bar 31; and a second bus bar 32. Each of the plurality of capacitor elements 2 includes an element body 20, a first electrode 21, and a second electrode 22. The first bus bar 31 includes: a first internal terminal 41 connected to the first electrode 21; a first external terminal 51; and a first coupling part 61 which couples the first internal terminal 41 to the first external terminal 51. The first coupling part 61 includes a side plate 601 which is located on the lateral side of the plurality of capacitor elements 2. The second bus bar 32 includes: a second internal terminal 42 connected to the second electrode 22; a second external terminal 52; and a second coupling part 62 which couples the second internal terminal 42 to the second external terminal 52. The capacitor element 2 farthest from the first external terminal 51 is disposed at a position closest to the side plate 601 of the first coupling part 61.SELECTED DRAWING: Figure 4

A film capacitor including a core, a plurality of film layers wrapped around the core, and at least one first spacer arranged between two first film layers of the plurality of film layers, wherein an interstice configured outside of a spacer cross-section is provided between the two first film layers by the at least one first spacer.

A device for online detection of the operating state of wind turbine transformer capacitors, characterized by: a passive wireless temperature measuring device comprising a passive wireless temperature sensor (2) used to detect the temperature of the capacitor (1), the passive wireless temperature sensor (2) being set via a fixing on the circumferential side of the capacitor (1), the passive wireless temperature sensor (2) receiving a stimulation signal and converting the stimulation signal into a linear resonance signal associated with the temperature change; a temperature signal acquisition device used to send a stimulation signal to a passive wireless temperature measuring device and receiving the temperature response signals output by a passive wireless temperature measuring device, the temperature information is acquired and output based on a change in the frequency of the temperature response signal; a temperature monitoring device used to receive temperature signals, output temperature information, and perform monitoring processing.

To provide multilayer ceramic electronic components that are miniaturized, have high capacity, and ensure moisture resistance reliability. [Solution] The disclosed multilayer ceramic electronic component includes a ceramic body comprising a plurality of dielectric layers and a plurality of internal electrodes arranged sandwiching the dielectric layers, an external electrode arranged outside the ceramic body, and a coating layer arranged on at least a portion of the outer surface of the ceramic body, wherein the coating layer comprises a water-repellent coating agent and at least one of a thermal stabilizer that removes free radicals generated from the water-repellent coating agent and an antioxidant that decomposes the free radical formation factors.

A DC link capacitor includes a lower busbar, an upper busbar, a cooling structure, and a plurality of structurally identical capacitor elements which are arranged between the lower busbar and the upper busbar and in electrical contact with the lower busbar and the upper busbar. The capacitor elements are spaced from each other in a longitudinal direction and in a transverse direction and are in thermally conductive contact with the cooling structure. The cooling structure includes thermally conductive element connected in a materially bonded manner to one of the lower busbar and the upper busbar. An active or passive cooling means is connected to an outer surface of one of the lower busbar and the upper busbar.

The utility model relates to the technical field of electronic components, and discloses a vertical electrode multilayer chip ceramic dielectric capacitor, which comprises two end electrodes and a plurality of ceramic dielectrics, graphite radiating fins are fixedly connected to the front and rear sides of the plurality of ceramic dielectrics, elastic sheets are fixedly connected to the two sides of the plurality of graphite radiating fins, and the elastic sheets are fixedly connected to the front and rear sides of the plurality of ceramic dielectrics. The sides, away from each other, of the foremost side and the rearmost side of the elastic piece are fixedly connected with multi-fin type heat dissipation plates, the front-back adjacent sides of the two multi-fin type heat dissipation plates are each provided with a plurality of clamping grooves, and the front-back adjacent sides of the multiple clamping grooves are rotationally connected with the same metal heat conduction column. According to the utility model, the heat of the ceramic medium is quickly transferred through the graphite radiating fins, so that the heat is guided into the hollow radiating pipe and is taken away by cold air, and meanwhile, the metal heat-conducting column transfers part of the heat to the multi-fin radiating plate, so that the radiating area is increased, the cooling efficiency is improved, the space utilization rate is optimized, and the performance of the capacitor is improved.

Provided is a polypropylene film having a high dielectric breakdown strength at high temperatures. Provided is a polypropylene film in which a polypropylene resin constituting the polypropylene film has a molecular-weight distribution (Mw / Mn) of the weight-average molecular weight Mw to the number-average molecular weight Mn of has a Z-average molecular weight Mz of 950,000-1,500,000, and has a weight proportion w of 2.6-4.2% in an integral molecular-weight distribution curve when the logarithmic molecular weight Log(M) is 4.0.

A capacitor includes a plurality of capacitor elements aligned in a first direction, a first bus bar, and a second bus bar. Each of the plurality of capacitor elements includes an element body, a first electrode, and a second electrode. The first bus bar includes a first internal terminal connected to the first electrode, a first external terminal, and a first connecting part that connects the first internal terminal with the first external terminal. The first connecting part includes a side plate positioned at a side of the plurality of capacitor elements in a second direction orthogonal to the first direction. A capacitor element disposed at a position farthest from the first external terminal in the first direction among the plurality of capacitor elements is disposed at a position closest to the side plate of the first connecting part in the second direction.

To provide a multilayer ceramic capacitor which suppresses DC resistance and obtains a heat dissipation effect and low ESL.SOLUTION: A multilayer ceramic capacitor 10 includes a multilayer body 12 including a plurality of dielectric layers 14 and a plurality of inner-electrode layers 16 and having first and second surfaces 12a and b facing each other in an x direction, third and fourth surfaces 12c and d facing each other in a y direction orthogonal or substantially orthogonal to a stacking direction, and fifth and sixth surfaces facing each other in a direction orthogonal or substantially orthogonal to the x direction and the y direction, first inner-electrode layers 16a exposed at the third and fourth surfaces, and second inner-electrode layers 16b exposed at the fifth and sixth surfaces. The multilayer body includes a first outer layer portion 16a and a second outer layer portion 20a, the first outer layer portion 20b being located between the first surface and the capacitance forming unit 18, the second outer layer portion LA being located between the second surface and the capacitance forming unit 18, the first outer layer portion LA being located on the non-mounting substrate side, and the second outer layer portion LA being located between the second surface and the capacitance forming unit.SELECTED DRAWING: Figure 5

The utility model relates to the field of low-voltage parallel capacitors, and discloses a long-service-life low-voltage parallel capacitor which comprises a shell, an upper cover is fixed to the upper end of the shell, a capacitor element is installed in the shell, the long-service-life low-voltage parallel capacitor further comprises a wiring mechanism, the wiring mechanism comprises a wiring seat, and the wiring seat is installed at the top of the upper cover; a wiring terminal and a discharging resistor are installed in the wiring seat, one end of the discharging resistor is electrically connected with the wiring terminal, the other end of the discharging resistor is electrically connected with the capacitor element, the discharging resistor and the wiring terminal are both located outside the shell, and a large amount of heat generated in the operation process of the discharging resistor is directly dissipated to the outside. The temperature rise generated in the operation process of the capacitor is reduced, so that the temperature rise is prevented from gathering in the shell to accelerate the aging of capacitor elements in the shell, and the service life of the capacitor is greatly prolonged.

A multilayer ceramic electronic component is provided. The multilayer ceramic electronic component includes a ceramic main body having a plurality of dielectric layers and a plurality of internal electrodes disposed such that the dielectric layers are interposed between the plurality of internal electrodes. An external electrode is disposed on an outer portion of the ceramic main body. A coating layer is formed on a portion of an outer surface of the ceramic main body and includes at least one of a thermal stabilizer that removes radicals generated from a water repellent coating agent and an antioxidant that decomposes radical formation factors and a water repellent coating agent. The coating layer improves moisture resistance reliability and durability of the multilayer ceramic electronic component under thermal stress and environmental stress.

A multilayer ceramic capacitor includes a multilayer body including layered dielectric layers and internal electrode layers, a first external electrode on a third surface, a second external electrode on a fourth surface, a third external electrode on a fifth surface, and a fourth external electrode on a sixth surface. The internal electrode layers include first internal electrode layers exposed at the third and fourth surfaces and second internal electrode layers exposed at the fifth and sixth surfaces. The multilayer body includes a capacitance generating portion in which the first and second internal electrode layers oppose each other, and first and second outer layer portions. The capacitance generating portion is arranged at a center in a layering direction. The first outer layer portion is provided on a non-mount substrate side. An electrical conduction portion is provided in the first outer layer portion.

A film capacitor with: a capacitor element (1) in which a metallikon electrode (11) is formed at one end; a busbar (2) which is connected to the Metallikon electrode (11); a housing (3) with a container (3A) for receiving the capacitor element (1) and the busbar (2); a lid element (5) that covers an opening of the container (3A); and a heat conducting element (4) arranged between the busbar (2) and the cover element (5), wherein the cover element has a projection (5A1) on a side facing the heat conducting element (4), the projection (5A1) is in contact with the heat conducting element (4) and the heat conducting element (4) is in contact with the busbar (2).

The invention relates to a DC link capacitor module (1) for an inverter (100), wherein the DC link capacitor module (1) has at least two windings (2) connected in series and having a central tap, wherein the windings (2) are connected to connecting plates (5, 6), wherein a first connecting plate (5) has terminals (7) for a positive contact (DC+) and terminals (8) for semiconductor switches (17) of the inverter (100), and the second connecting plate (6) has terminals (9) for a negative contact (DC-) and terminals (10) for semiconductor switches (17), wherein the windings (2) have a first end face (3) and a second end face (4) each with a contact, wherein the DC link capacitor module (1) has at least one shielding plate (19) arranged between the connecting plates (5, 6) and the outer surfaces of the windings (2).wherein the second end faces (4) of the adjacent windings (2) are connected to the shielding plate (19), wherein the first end faces (3) are connected to the connecting plates (5, 6), wherein the shielding plate (19) is thermally and electrically connected to a base plate (14), and an inverter (100) with such an intermediate circuit capacitor module (1).

The application provides a kind of encapsulation method of ceramic capacitor. The method first respectively prepares bisphenol-A (di) glycidyl ether and methyl tetrahydrophthalic anhydride mixture and polyvinyl pyrrolidone, ceramic powder and N, N-dimethylformamide slurry as the inner layer and outer layer spinning solution of spinning, then ceramic composite spinning film is prepared by electrospinning and is wound on the surface of capacitor. Finally, the uniformly mixed bisphenol-A (di) glycidyl ether, methyl tetrahydrophthalic anhydride and 2,4,6-tris (dimethylaminomethyl) phenol are extracted into the mold placed with ceramic capacitor under vacuum condition to solidify and form. The method provided by the application is simple, and the process operability and repeatability are good. The requirement for equipment is low. While effectively improving the thermal conductivity of the encapsulation layer, it can ensure good encapsulation effect and insulation strength, and has good application potential in the field of pulse power capacitor.

The utility model relates to the technical field of electric power facilities, in particular to a cylindrical dry-type low-voltage power capacitor, which comprises a shell, a radiating fin I, a radiating fin II, an electric appliance element arranged in the shell and terminals arranged at the top end and the bottom end of the shell, and one end of the radiating fin I is rotationally connected with one end of the radiating fin II through a hinge; the two ends of the outer wall of the circumference of the shell form extensions, bolts are elastically and slidably arranged on the two sides of the other end of the first cooling fin, grooves matched with the bolts are formed in the extensions, fixing grooves are formed in the two sides of the other end of the second cooling fin, balls are elastically arranged on the extensions, and one ends of the balls are located in the fixing grooves. The structure is simple, the installation mode of the two cooling fins is optimized, the cooling fins can be disassembled and assembled without tools, the size of the cooling fins is reduced, and the use limitation is reduced.