3results about How to "Improve insulation stability" patented technology

The utility model discloses a high-temperature-resistant shell structure for a SiC power device, which comprises a plastic frame, and three AC power terminals are fixed at the bottom of the plastic frame through integral injection molding. According to the utility model, the plastic frame, the DC1 power terminal, the DC2 power terminal and the AC power terminal are subjected to integrated injection molding, so that the phenomena of independent assembly and terminal plugging hole position reservation are avoided, and a better integrated stable effect is achieved; the insulating layer prefabricated member made of PPA, PPS or insulating ceramic materials is clamped, positioned, separated and insulated between the DC1 power terminal and the DC2 power terminal in advance, the high temperature resistance and the insulating property are both superior to those of a traditional PBT plastic single material, the junction temperature of the SiC power device can be remarkably increased, the electric leakage risk caused by aging of the insulating layer between the DC1 power terminal and the DC2 power terminal is reduced, and the service life of the SiC power device is prolonged. The insulation stability between the two is improved, and the requirements of long-term high-temperature-resistant service in different application scenes are met.

This invention belongs to the field of protective coating technology and discloses an environmentally friendly ceramic-graphene composite insulating protective coating and its preparation method. The coating comprises an aqueous epoxy resin, an inorganic ceramic precursor film-forming component, a core-shell-interface modified insulating graphene functional filler, an aqueous curing agent, and additives. The functional filler includes a graphene core, an Al2O3 insulating shell continuously coated on its surface, and an epoxy reactive organosilicon interface layer grafted onto the outer surface of the Al2O3 insulating shell. By first preparing the functional filler and then compounding it with the aqueous epoxy resin and the inorganic ceramic precursor film-forming component to form a film, the resulting coating possesses excellent insulation, protection, and adhesion stability, making it suitable for insulating and protecting metal substrate surfaces.

The present application relates to the technical field of wireless power transmission, and particularly relates to a coil arrangement design method and system of a multi-relay wireless power transmission structure, steps as follows: determining the transmission distance according to the voltage level; under the constraint of the transmission distance, introducing the arrangement ratio to represent the ratio of the second interval between adjacent groups in the non-equidistant grouping arrangement and the first interval between the coils in the same group, and establishing a geometric parameterized model of the non-equidistant arrangement; constructing the coupling impedance matrix based on the mutual inductance theory, and deducing the system energy transmission efficiency model; for different candidate values of the coil series, on the basis of the given coil parameters, the efficiency distribution curve of the system efficiency changing with the arrangement ratio is obtained by adjusting the arrangement ratio; based on the efficiency distribution curve, the optimal coil series and the corresponding optimal arrangement ratio that make the system energy transmission efficiency optimal are determined, and the optimal design scheme of the coil arrangement design is obtained. The present application can effectively improve the stability of system operation, the reliability of coil interface combination and the overall insulation stability.