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247results about How to "Reduce opening time" patented technology

Permanent magnet actuating mechanism for high-voltage vacuum circuit breaker based on principle of electromagnetic repulsion

The invention discloses a permanent magnet actuating mechanism for a high-voltage vacuum circuit breaker based on a principle of electromagnetic repulsion, and belongs to the field of high-voltage vacuum circuit breakers. The permanent magnet actuating mechanism comprises an electromagnetic driving mechanism, a permanent magnet holding mechanism, an opening-buffering spring, a guide rod and a non-magnetic frame, and is characterized in that the electromagnetic driving mechanism comprises an opening electromagnetic repulsion mechanism and a closing electromagnetic driving mechanism; the permanent magnet holding mechanism comprises an opening permanent magnet, a closing permanent magnet, a holding static iron core and a holding moving iron core; and a non-magnetic gasket is arranged between the permanent magnet holding mechanism and the opening-buffering spring. The permanent magnet mechanism is enabled to realize high-speed opening at an initial period of an opening operation by using a characteristic of high-speed driving of the electromagnetic repulsion mechanism and energy stored by the spring in the closing process, and the opening-buffering spring plays a role of buffering at the final stage of the opening process, so that the instantaneous separating speed of the permanent magnet actuating mechanism is greatly improved on the one hand, and the loss, which is caused by excessively high speed at the final stage of opening, of the mechanism and the circuit breaker is restricted on the other hand.
Owner:HARBIN UNIV OF SCI & TECH

Disposable internal opening cutting and enclosing anastomat

The invention relates to the technical field of disposable anastomats, in particular to a disposable internal opening cutting and enclosing anastomat. The disposable internal opening cutting and closing anastomat comprises a cutting molding assembly, a transmission assembly and a gun body provided with a triggering assembly, wherein the cutting molding assembly comprises a nail cabin bracket, a scalpel support ring, a nail pressing seat, a nail pushing device, a nail cabin support and a nail cabin; the nail cabin is clamped in a clamping groove of the nail cabin support through a buckle; the nail cabin support is directly connected with the gun body through the transmission assembly; the head of the nail cabin is circular-arc-shaped or parabolic; nail grooves of the nail cabin are of asymmetrical mode; the transmission assembly comprises a transmission lead screw; the lead screw is a large-screw-pitch left-handed lead screw; the tail end of the lead screw is connected with a corresponding lengthened nut assembly; the lengthened nut assembly and a knob positioned at the tail end of the gun body are molded together by injecting or embedded together; the gun body is a lever type or connecting-rod-type gun body. The disposable internal opening cutting and enclosing anastomat is skillful in design, and has a good application prospect; by adopting the disposable internal opening cutting and enclosing anastomat, a plurality of use problems in the prior art can be solved effectively.
Owner:JIANGSU QIANJING MEDICAL EQUIP

Smart access control system based on city Internet of Things and security system

InactiveCN108320359ARealize all-round real scene shootingConvenient remote guidanceIndividual entry/exit registersGeographical information databasesSecurity systemEmbedded system
The invention discloses a smart access control system based on city Internet of Things and a security system. The smart access control system comprises a cloud server, an agency server, a motor vehicle access control system, a non-motor vehicle and person access control system, a cell gate access control system, a building anti-climbing system, a three-dimensional real scene map and a GIS (geological information system), wherein the motor vehicle access control system, the non-motor vehicle and person access control system, the cell gate access control system and the building anti-climbing system are respectively connected with the cloud server; the cell gate access control system comprises an IC (integrated circuit) card access control system, a video telephone access control system, a human face recognition access control system, a mobile phone MAC (media access control) address access control system and a palm vein access control system. The smart access control system and the security system have the advantages that the communities in the city Internet of Things are displayed in the three-dimensional real scene map, then the authority management is performed on persons, motor vehicles and non-motor vehicles in the communities, and the entry and exiting at the entrance and cell gates of the communities can be monitored, so as to improve the intelligence management of the community, and facilitate the public security system to supervise and manage.
Owner:SUZHOU SHENGSHIHUAAN INTELLIGENT SCI & TECH CO LTD

IGBT device capable of improving switch-on and switch-off speed and switch-on and switch-off uniformity and manufacturing method thereof

The invention relates to a power device and a manufacturing method of the power device, in particular to an IGBT device capable of improving the switch-on and switch-off speed and switch-on and switch-off uniformity and a manufacturing method of the IGBT device. The IGBT device comprises emitting electrode PAD regions, a grid PAD region, grid Finger regions, a grid Bus region and a terminal region. The grid PAD region is located at the center of the device, the emitting electrode PAD regions are distributed around the grid PAD region and separated by the grid Finger regions, the grid Bus region surrounds the emitting electrode PAD regions, and the terminal region is located on the periphery of the grid Bus region. By improving the traditional structural design of a polycrystalline silicon layer and a metal layer, the speed of charging and discharging cellular grids is improved when the IGBT device is switched on or switched off, and accordingly the overall switch-on and switch-off speed of the IGBT device is improved. Compared with a traditional IGBT device structure, the IGBT device has the advantages that the switch-on and switch-off speed of the IGBT device is improved, and the switch-on and switch-off uniformity of IGBT cells is improved at the same time.
Owner:STATE GRID CORP OF CHINA +2
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