30results about How to "Suppression of partial discharge" patented technology

A semiconductor device in which electrodes of a plurality of semiconductor elements are bonded onto at least one of a plurality of electrode patterns on an insulator substrate, the other surface of the insulator substrate being bonded to a heat dissipating base. The upper surface of the heat dissipating base is covered with a member for cutting off the semiconductor elements from the outer environment. Terminals electrically connect the electrodes on said insulator substrate and the electrode placed outside the cutoff member. The material of the heat dissipating base has a linear expanding coefficient larger than that of the semiconductor element and smaller than three times that of the semiconductor element, and a thermal conductivity larger than 100 W / mK. The semiconductor elements are arranged on at least one electrode surface and in at least two regions divided by the other electrode surface on the insulator substrate.

The invention discloses a + / -660 kV direct-current composite insulator which comprises an annular metal connecting piece located at the end, a sealing ring, an epoxy resin glass fiber stick, a sheath and grading rings. The annular metal connecting piece is connected with the grading ring at the grounding end. The grading ring at the grounding end is connected with the front end of the epoxy resin glass fiber stick through the sealing ring. The outer surface of the epoxy resin glass fiber stick is wrapped by the sheath. Umbrella skirts of three specifications are arranged on the sheath. The tail end of the epoxy resin glass fiber stick is connected with the grading ring at the high-voltage end. According to the + / -660 kV direct-current composite insulator, the structural mode of one large umbrella and two small umbrellas of an extra-large umbrella with arranged flowers is adopted, the creepage distance is effectively increased on the basis of an existing structural height, the electric field distribution of the surface of the + / -660 kV direct-current composite insulator is improved, the local field intensity is reduced, partial discharge is restrained, meanwhile, ice and snow bridge connection can be blocked due to the structure, and the + / -660 kV direct-current composite insulator has the good ice, snow and lightning prevention capacity.

A vacuum insulated switchgear having a vacuum container, a fixed contact disposed in the vacuum container, a movable contact disposed in the vacuum container capable of being in contact with or out of contact with the fixed contact, a driving mechanism for driving the movable contact in directions to contact with and out of contact with the fixed contact, a resin portion molded around the vacuum container, an insulative bushing for covering a pulled-out portion of a conductor connected to the fixed contact and for extending from the molded resin portion, and a cable head insulating member for covering a conductor of a cable head connected to the conductor at the pulled-out portion and an outer surface of the cable head insulating member being earthed, characterized in that:an earthed conductive member is embedded at least at a position opposite to an end of the cable head insulating member in the bushing.

The invention provides a high-power high-voltage high-frequency transformer. The transformer comprises an insulating partition plate; a primary winding and a secondary winding which are respectively arranged on two sides of the insulating partition plate, wherein the primary winding and the secondary winding are spirally coiled according to a plane to form a wire cake, and an inner hole is formedin the center of the wire cake; and primary and secondary side magnetic cores which are arranged in inner holes of the primary and secondary side windings; the primary side magnetic core is fixed in the primary side shielding case, the secondary side magnetic core is fixed in the secondary side shielding case, and the primary side shielding case and the secondary side shielding case enable the whole high-power high-voltage high-frequency transformer to be flat. Therefore, the transformer is in an ultra-thin flat shape, thermal resistance can be reduced, voltage resistance and creepage distanceare guaranteed, insulating materials are saved, due to the flat shape, the distance between the shielding covers on the two sides is small, the plane is large, the uniformity of an internal electricfield is good, no partial discharge can be achieved, and the insulating plate is arranged between the primary winding and the secondary winding. The primary side and the secondary side of the transformer can be completely isolated, and high-voltage isolation is achieved.

Provided is an insulated electric wire comprising a conductor, an insulation layer including a foam heat-curable resin and which covers the outer circumferential surface of the conductor, and an outside non-foam insulation layer that covers the outer circumferential surface of the insulation layer. The thickness deformation rate of the insulation layer when a pressure of 1 MPa is applied at 25°C is 15%-50%. The pencil hardness of the outside non-foam insulation layer is at least 4H and the ratio between the insulation layer thickness and the outside non-foam insulation layer thickness is 20:80-80:20. Also provided is a motor having this insulated electric wire wound around a stator slot, in a state in which pressure is applied in the direction in which the outer diameter of the insulated electric wire decreases, and the thickness of the insulation layer is reduced.

The invention discloses an electrostatic probe-based GIL insulator surface charge on-line monitoring system, which comprises an electrostatic probe; the electrostatic probe comprises three fan-ring-shaped red copper electrodes uniformly distributed along the circumferential direction of the electrostatic probe, fan-ring-shaped epoxy insulators are fixed between the fan-ring-shaped red copper electrodes, and the epoxy insulators are fixedly connected with an insulator; the fan-ring-shaped red copper electrodes are connected with resistance voltage dividing arms, the resistance voltage dividingarms are electrically connected with operational amplifiers, and the operational amplifiers are electrically connected with induction potential data acquisition devices used for detecting the fan-ring-shaped red copper electrodes. The electrostatic probe is pre-installed near a ground electrode of a GIL insulator, probe induction voltage is stored in real time through the data acquisition system,and the surface charge accumulation condition can be monitored in real time; the electrostatic probe measures surface charges in a non-contact manner, the original surface charge distribution is not damaged, and the probe adopts a circular ring design, so that the distortion of the probe to an original electric field can be effectively reduced.

An object of the present invention is to provide an evaluation apparatus and a semiconductor device evaluation method that are capable of suppressing the occurrence of partial discharge during the evaluation of the electrical characteristics of a semiconductor device, and suppressing the transfer of foreign matter or rubber traces to the surface of the semiconductor device, and having high convenience. The evaluation apparatus includes an insulating plate, a plurality of probes fixed to the insulating plate, an insulating portion having a connection portion connected to the insulating plate ina detachable manner and a tip portion continuous with the connection portion, the tip portion being narrower than the connection portion, an insulator formed by combining the insulating portions to surround the plurality of probes in planar view, and an evaluation unit for passing currents through the plurality of probes to evaluate electrical characteristics of an object to be measured.

The bonded body of the present invention is a bonded body of a ceramic member made of ceramics and a Cu member made of Cu or a Cu alloy, and in a bonded layer formed between the ceramic member and the Cu member, from the bonded surface of the ceramic member toward the Cu member Cu in the region with a side distance of 50 μm 3 The area ratio of the P phase is 15% or less.

The invention discloses a manufacture method of a solid insulating circuit device, which comprises the steps of: cleaning the surface of an electric conductor of a circuit device, preheating and then placing into a heated mould, and injecting a liquid epoxy resin composite material composed of silicon micropowder, epoxy resin and a curing agent into the mould; and taking a molded solid insulatingcircuit device blank from the mould after the epoxy resin composite material in the mould is cured, placing the blank into a baking oven for post-curing treatment, then carrying out sand blasting treatment on the surface of the blank except the part of the interface of the electric conductor to be insulated, coating a layer of conductive coating, carrying out evaporation treatment in the air, andthen carrying out curing treatment in the baking oven to complete the manufacture of the solid insulating circuit device. Compared with the prior art, the invention can be used for effectively decreasing partial discharge values inside the solid insulating circuit device and surface inductive voltage of a product.

Disclosed are a semiconductor device, and a method for manufacturing semiconductors. When a voltage is applied to a semiconductor element formed into a semiconductor substrate for evaluating the electrical characteristic of the semiconductor element, partial discharge between the semiconductor element and an inter-element portion, adhesion of a foreign substance to the semiconductor substrate, andformation of a trace of a component in the semiconductor substrate are prevented. A semiconductor device includes a semiconductor substrate and a discharge inhibitor. The semiconductor substrate includes a plurality of semiconductor elements and an inter-element portion. The semiconductor elements are arranged in a spreading direction of the semiconductor substrate. The inter-element portion is between adjacent semiconductor elements among the semiconductor elements. The discharge inhibitor is bonded not to a surface of a center of each semiconductor element among the semiconductor elements but to a surface of the inter-element portion. The discharge inhibitor is made of an insulator.

An object of the present invention is to minimize damage to a dielectric plate support portion and a metal container and to improve plasma processing efficiency. In the present invention, the resin layer is arranged in the facing area of ​​the dielectric plate and the processing container, thereby, particles and damages caused by the difference in thermal expansion coefficient between the dielectric plate and the metal processing container can be suppressed, and the The occurrence of partial discharge on the electric field boundary part such as the edge part of the film improves the plasma treatment efficiency of oxide film formation.

Provided is an induction furnace capable of further increasing the voltage applied to a coil. An induction furnace (10) is provided with: a crucible (14) that houses a material (12) to be heated; a coil (16) that is wound around the outer periphery of the crucible (14) and has an insulating coating film; a conductive layer (18) that covers the outer peripheral surface of the coil (16); and a yoke(22) that holds the coil (16) from the outer peripheral side with the conductive layer (18) interposed therebetween. The conductive layer (18) and the yoke (22) are grounded. The conductive layer (18)is a conductive resin or a conductive adhesive, and is in close contact with the insulating film of the coil (16). A conductive buffer material (20) is included between the conductive layer (18) andthe yoke (22), and the conductive layer (18) is grounded via the buffer material (20) and the yoke (22).

The invention discloses a + / -660 kV direct-current composite insulator which comprises an annular metal connecting piece located at the end, a sealing ring, an epoxy resin glass fiber stick, a sheath and grading rings. The annular metal connecting piece is connected with the grading ring at the grounding end. The grading ring at the grounding end is connected with the front end of the epoxy resin glass fiber stick through the sealing ring. The outer surface of the epoxy resin glass fiber stick is wrapped by the sheath. Umbrella skirts of three specifications are arranged on the sheath. The tail end of the epoxy resin glass fiber stick is connected with the grading ring at the high-voltage end. According to the + / -660 kV direct-current composite insulator, the structural mode of one large umbrella and two small umbrellas of an extra-large umbrella with arranged flowers is adopted, the creepage distance is effectively increased on the basis of an existing structural height, the electric field distribution of the surface of the + / -660 kV direct-current composite insulator is improved, the local field intensity is reduced, partial discharge is restrained, meanwhile, ice and snow bridge connection can be blocked due to the structure, and the + / -660 kV direct-current composite insulator has the good ice, snow and lightning prevention capacity.

Provided is a plasma processing apparatus capable of shortening a return current path and ensuring symmetry. A plasma processing apparatus according to an embodiment of the present invention includes a chamber main body, a stage, a high-frequency electrode, a plurality of ground members, and a movable unit. The chamber main body has a side wall, and a part of the side wall includes an opening through which the substrate can pass. The plurality of ground members are disposed around the stage, and are electrically connected between the side wall and the stage. The movable unit has a support that supports a first ground member that is a part of the plurality of ground members. The movable unit is configured such that the supporting body and the first grounding member can be electrically connected to the inner peripheral surface at a first position where the first grounding member faces the inner peripheral surface of the opening with the first grounding member interposed therebetween. to move between the second positions.

The present invention relates to an insulated electric wire having partial discharge resistance and a partial discharge inception voltage. Specifically, the present invention relates to an insulated electric wire having partial discharge resistance, which not only has excellent partial discharge resistance, The voltage is high, and the adhesion between the conductor and the insulating layer, the flexibility of the insulating layer, etc. are also excellent, and the manufacturing process is simple and the manufacturing cost is low.

The invention provides an insulating gas insulating performance experiment system and a method thereof applied to electrical equipment. The insulating gas insulating performance experiment system and the method thereof applied to the electrical equipment is targeted to the defect of an insulating gas discharging decomposition device. By means of the insulating gas insulating performance experiment system and the method thereof applied to the electrical equipment, an insulating performance experiment of high-low pressure insulating gas in the electrical equipment can be conducted, various defects of a real GIS can be effectively simulated, the insulating performance of various replaced gas and mixed gas of the replaced gas under the experiment condition of different defects, different mixing ratios and different air pressure can be obtained, comparing with SF6 gas under the same experiment condition is conducted, and the experiment basis for replacing the SF6 gas is provided.

To ensure a surface pressure on the interface between the insertion hole in a bushing and a rubber mold body to prevent a void from occurring. The inventive bushing (2) is provided with an insertion hole (3a) for housing an arrester mold body (6), and a tapered insertion hole (53a) spreading in a conical shape from the high pressure side of the bushing (2) to the low pressure side is provided in a region where electric field of the insertion hole (3a) concentrates. The arrester mold body (6) is provided with a rubber mold body (67) consisting of silicone rubber or the like integrally molded around the outer periphery of an arrester element laminate (61), and the rubber mold body (67) is provided with a conical portion (67b) to be able to be fitted to the tapered inner surface of the tapered insertion hole (53a).

The invention provides a high-voltage isolation transformer, which includes one or more sub-transformers; when there is one sub-transformer, the high-voltage isolation transformer is equivalent to the sub-transformer; when there are multiple sub-transformers, the multiple sub-transformers are connected in cascaded form, All transformers are connected in parallel with voltage equalizing devices. The high-voltage isolation transformer provided by the invention avoids the situation that partial discharge is difficult to control. The voltage level can be extended to hundreds of kilovolts and above, and it is beneficial to the heat dissipation of the windings, which can realize effective insulation and isolation in a compact space. Effectively reduce the difficulty of transformer insulation design and manufacturing process and volume; the invention has high insulation withstand strength and low field strength distribution, and at the same time can realize effective suppression of partial discharge, and realize low partial discharge design of transformers, and the voltage level is above 100,000 volts The partial discharge amount does not exceed 50pC; it has the advantages of small structural size, high mechanical strength, and flexible installation.

The invention discloses an on-line monitoring system for surface charge of GIL insulators based on an electrostatic probe. An annular epoxy insulator, and the epoxy insulator is fixedly connected with the insulator; the fan-shaped copper electrodes are connected with a resistance voltage divider arm, and the resistance voltage divider arm is electrically connected with an operational amplifier, and the operational amplifier is electrically connected with an induction sensor for detecting each fan-shaped annular copper electrode. Potential data acquisition device. The electrostatic probe of the present invention is pre-installed near the ground electrode of the GIL insulator, and the probe induced voltage is stored in real time through the data acquisition system, which can monitor the accumulation of surface charge in real time; the surface charge measured by the electrostatic probe is a non-contact measurement, which will not destroy the original surface charge distribution, and the probe adopts a circular ring design, which can effectively reduce the distortion of the probe to the original electric field.