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148results about How to "Realize hot swap" patented technology

Plugging device for circuit board and server

The embodiment of the invention discloses a plugging device for a circuit board and a server, and belongs to the technical field of electronic assembly. The technical problem that a peripheral component interconnect express (PCI-E) card is difficultly subjected to hot plugging in the prior art is solved. The plugging device for the circuit board comprises a base plate, a pulling strip, rotating members and a carrier plate, wherein the pulling strip is movably connected with the base plate through a transverse guiding mechanism; sawteeth are formed on the body of the pulling strip; the pulling strip comprises a handle which is extended out of the base plate; the rotating members are in fold line shapes; each rotating member comprises a first arm, a first rotation shaft and a second arm; the first rotation shaft is arranged at the turning of each rotating member and is used for movably connecting each rotation member and the base plate; sawteeth are formed at the tail end of the first arm and are engaged with the sawteeth on the pulling strip; the second arm is movably connected with the carrier plate through a transmission mechanism; the carrier plate is movably connected with the base plate through a longitudinal guiding mechanism; and clamping slots are formed on the carrier plate and are used for fixing the circuit board. The plugging device is applied to the plugging of the circuit board in electronic equipment.
Owner:HUAWEI TECH CO LTD

Method and apparatus capable of realizing safe hot plug of secondary current loop of transforming plant

The invention relates to a method and a device which can realize the safe hot plug of a secondary current circuit of a transformer substation, which belongs to the field of safe devices. The device comprises an access terminal of a secondary circuit current transformer and a current transformer to be accessed, a plug-in spring assembly with a binary elastic contacts is arranged between connection terminals of the access terminal of the current transformer; meanwhile, a bidirectional diode set is arranged, and an insert plate with conducting layers which are arranged on the two sides and mutually insulated is also arranged, and the conducting layers of the two sides of the insert plate are respectively and electrically connected with the two ends of a primary coil of the current transformer to be accessed. By adopting the double means of mechanical technology and electronic technology, the method and the device ensure that commissioning / disengaging of the secondary circuit is under the protection of the simplest and most reliable technology, and the 'hot plug' of the secondary current circuit of an electroprobe of the transformer substation is realized, thus greatly simplifying the fussy overhaul, replacement, testing and debugging of a measuring device in the running course, and improves the running reliability of the equipment. The method and the device can be widely applied to the fields of electrical measurement or monitoring of the power transformation and distribution systems.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1

Method for supporting parallel access of multiband 6LoWSNs (IPv6 over low power wireless sensor networks) to internet

ActiveCN104519554ASatisfy the requirement of simultaneous access to the InternetAchieve integrationAssess restrictionNetwork topologiesExtensibilityMobile wireless sensor network
The invention relates to a method for supporting parallel access of multiband 6LoWSNs (IPv6 over low power wireless sensor networks) to the internet. Five wireless sensor network access channels are designed according to the bands and types of the wireless sensor networks and are named as channels F1 to F5; the status of each access channel is judged by means of port polling; 433MHz, 470MHz, 780MHz, 2.4GHz and WiFi5 sensor networks are used as sub-network access terminals; a network layer of each sensor network is based on the IPv6 protocol. Boundary nodes of the sensor networks are used for managing and acquiring data information network nodes which the boundary nodes belong to and uploading the acquired data to access equipment; after the access equipment finishes identification of the data channels and adapting of network layer protocols (IPv6 and IPv4), and the data is finally transmitted to the IPv4 based internet. The access equipment designed can be well applied to sensor network expansion and extension scenes, allowing an external network to acquire and share internal resources of the sensor networks; the method of access to multiple channels is good in extensibility.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

Modularized multilevel flexible DC (direct current) transmission valve base control equipment

The invention provides modularized multilevel flexible DC (direct current) transmission valve base control equipment which comprises power panels, interface boards, a back plate and central processing boards, wherein the power panels and the interface boards are arranged at the two sides of the central processing boards; the central processing boards, the interface boards and the power panel sare arranged on the back plate. In the invention, a unified hardware structure design is adopted so that a circuit control unit and a bridge arm control unit in the valve base control equipment can be combined flexibly, thus satisfying demands of different flexible DC transmissions projects; a design of dual central processing boards is adopted to ensure the reliability of real-time operation and improve the operation efficiency of the central processing boards; Lvds (low voltage differential signaling) data bus and clock bus are simultaneously used to improve the data transmission rate and ensure the synchronism of data transmitting; the designs of dual central processing boards and alternative interface board can improve the reliability of data transmission and has good extension; the design of dual power panels can improve the reliability of power supply, and electric maintenance and hot plugging can be realized.
Owner:CHINA ELECTRIC POWER RES INST +1

Multi-machine parallel control topological structure based on high-voltage inverters

The invention relates to a multi-machine parallel control topological structure based on high-voltage inverters. The cascade high-voltage inverters are connected in parallel, communicated with a PLC externally and communicated with each other through optical fibers. Coordination control over the inverters is performed through the same central controller. By means of multi-machine parallel connection, overall capacity expansion of the driving inverters is achieved, and the purpose that small-capacity power devices are connected in parallel to control a large motor is achieved. By means of the multi-machine parallel control topological structure, soft handover of the motor controlled by the inverters is achieved, the process of galloping starting of spare inverters required when shutting down of the inverters happens is avoided, therefore, the purpose of one inverter with a backup is achieved truly, control over the large-capacity motor is achieved by means of parallel connection of more than two inverters through the IGBT inverter bridge cascade topological structure, the multi-machine parallel control topological structure treads into the field where only an IEGT can tread in the past, and the problem of heat dissipation caused by operation of high-power devices in the past is avoided.
Owner:WOLONG ELECTRIC GRP CO LTD +1

Hot-plug assembly used in matched mode with circuit breaker and circuit breaking arrangement

The invention discloses a hot-plug assembly and a circuit breaking arrangement. The hot-plug assembly comprises a movable part and a fixed part which are electrically connected through an electrical connector. When a circuit breaker works, a contact pin of the electrical connector located in the movable part is correspondingly connected with a base located in the fixed part, and the fixed part breakovers with the circuit breaker inside the movable part. When the circuit breaker fails and needs maintenance and replacement, the movable part can be pulled out from the fixed part, and the circuitbreaker is electrically disconnected from the fixed part. Compared with fixedly installed circuit breakers, the pluggable structure can provide convenience for the maintenance and replacement of devices. An anti-electric shock protection mechanism of the fixed part isolates a first base inside the fixed part, thus electric shock is effectively avoided when maintenance personnel pull out the movable part under the condition that a system is not powered off, and safe hot plug of the circuit breaker is realized. By adopting the hot-plug assembly, the maintenance and replacement of the circuit breaker can be realized under the condition that the system does not need to disconnect a main circuit breaker, and the power supply of other power supply branches is not affected.
Owner:HUAWEI DIGITAL POWER TECH CO LTD

Method for allocating NAT (network address translation) port resources in distributed system

The invention provides a method for allocating NAT (network address translation) port resources in a distributed system, belonging to the technical field of network communication. The method for allocating NAT port resources in a distributed system specifically comprises the following steps: a first message in a first session state triggers the NAT module of a present service board to apply for N port resources to the NAT module of a control board while passing through some service board; a port is taken, and the conversion information of the taken port is obtained by the first message; the first session state is stored on the present service board, and the follow-up messages in the first session state are forwarded on the present service board according to the session state stored on the present service board; when a first message in a follow-up session state passes through the present service board, the NAT module of the service board takes a port from the remainder N-1 ports; the first message in a follow-up session state obtains the conversion information of the taken port, and the follow-up session state is stored on the present service board; and the follow-up messages in the follow-up session state are forwarded on the present service board according to the session state stored on the present service board.
Owner:HILLSTONE NETWORKS CO LTD

Master-slave parallel inverter output current sharing control method

The invention discloses a master-slave parallel inverter output current-sharing control method in the field of inverter parallel control, and the method comprises the steps: carrying out the detectionof an output current fundamental wave and each harmonic wave through an inverter host, and sharing the output current fundamental wave and each harmonic wave to an inverter slave in real time througha high-speed CAN communication bus; enabling the inverter slave to receive output current information shared by the inverter host, synthesizing the output current information into reference current,and enabling the output current to track the reference current in a static error-free manner through current closed-loop PI control, so the current-sharing control of current fundamental waves and harmonic waves of each order is realized. According to the invention, the calculation amount is small, the calculation precision is high, the real-time performance is good, and when a large-capacity nonlinear load is suddenly input into the output end, fundamental waves and harmonic waves of each order can also realize dynamic current sharing; and the control framework is simple, is not influenced bythe difference between the output impedance of the inverters and the line impedance, can realize hot plug and the access or quit of one or more inverters in practical application, and does not influence the operation of the control system.
Owner:HEFEI TONGZHI ELECTRICAL CONTROL TECH
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