41results about How to "Improve interrupt performance" patented technology

The invention discloses a double route configuration method for electric power optical fiber communication net services. The double route configuration method comprises the step of establishing a reasonable and effective electric power optical fiber communication net service transmission model G (V, E, W, Q and C) according to the practical engineering, and the step of ranking services according to the importance degree, and configuring two routes (AP and BP) not crossed completely based on the improved Bhandrari algorithm and processing a bilateral (max{q(ek)}=2) network diagram according to the actual situation based on the new algorithm, wherein the maximum bearing service volume c (ek) of each optical cable is allowed to be set. By means of the method, the requirements of the electric power services needing to be configured with two paths separated completely can be met, and the services are still safe and reliable under the cable breakdown and other failure situations. By means of the double route configuration method, the bilateral network diagram mapped by two optical cables can be processed, and the optical cable bearing capacity is allowed to be set. The double route configuration method has a certain advantage in balancing the network load.

An arrangement for interrupting current comprises a first and a second terminal. First, second, and third parallel circuit branches are arranged between the terminals to electrically connect two power networks. The first parallel circuit branch comprises a mechanical main circuit breaker, the second parallel circuit branch comprises an energy absorbing device, and the third parallel circuit branch comprises a resonant circuit and a voltage control means arranged in series. The voltage control means is controllable to inject energy into the resonant circuit to force a rapid increase of alternating current, wherein the alternating current flows in a loop containing the first and the third parallel circuit branches as the mechanical main circuit breaker is controlled to open to interrupt main current. Zero cross-over of the current through the mechanical main circuit breaker is thereby realized as the alternating current amplitude exceeds the main current amplitude.

A fuse including a fuse housing having first and second electrical terminals, a movable partition made from an electrically conductive material movably disposed within the fuse housing, a fusible structure connected between the first electrical terminal and the movable partition, a conductor connected between the movable partition and the second electrical terminal, a biasing element acting on the movable partition to maintain the fusible structure in tension and for moving the movable partition upon melting of the fusible structure and an indicator connected between the movable partition and the second electrical terminal. The conductor, the movable partition and the fusible structure define an electrical path between the first and second electrical terminals and the indicator protrudes out of the second electrical terminal of the fuse housing upon melting of the fusible structure for providing visual indication of an interrupted condition of the fuse when subjected to a threshold current flowing therethrough.

An arrangement for interrupting current comprising a first and a second terminal adapted to electrically connect two sections of a power system is provided. A voltage control means is controllable in use to inject energy into said loop to force a rapid increase of an alternating current flowing through said main branch while being controlled to open to interrupt a main current, and whereby zero cross-over of the current through the mechanical main circuit breaker is realized as the amplitude of the alternating current exceeds the amplitude of the main current. An energy absorbing device is adapted to limit the voltage across said capacitor and said mechanical breaker when the mechanical breaker is open, and across an inductive element if the voltage across the mechanical breaker breaks down, at or immediately after an opening process, thereby limiting the rate-of-rise and the peak of the current through said loop.

An electromagnetic relay is provided which is small in size and is capable of controlling two circuits of an ordinarily-open contact, which has a large current-carrying capacity and high interrupting capability, and which is excellent in resistance against shock and vibration. Movable contactors are held, through bow-shaped movable contactor springs, to two -shaped holding frames each being electrically separated and being mechanically connected via a card made of a highly heat-resistant resin in a card block. Thick-plate shaped movable contacts, which are attached to the movable contactors in a fixed manner, are electrically connected or disconnected to fixed contacts in a base block, in synchronization with operations of an armature of an electro-magnet block. In order to improve a current-carrying capability and interrupting capability, there are provided two pieces of ordinarily-open contacts which are connected in series to each other, and between which an interval is doubled, in each of two circuits.

The present invention relates to an arc-extinguishing insulation material molded product provided in the vicinity of a contact point between contactors in a gas circuit breaker. The arc-extinguishing insulation material molded product includes a polymer which contains a carbon-oxygen bond in the main chain, and in which a part of or all of terminal atoms are non-hydrogen atoms.

This invention discloses a low-voltage circuit breaker with a capability of tripping quickly. Its main feature is that at least one of the side faces of the contact device provides an open flange which has an internal through hole, and the bottom of a rotating shaft disposed on the bottom part provides a stressed member. The stressed member receives the over-pressure airflow escaping from the open flange of the contact device to generate a force. The force is passed to the activating member by the rotating shaft and is magnified, then hits the latch quickly and makes a trip. An intermediate step is bypassed due to the force produced earlier, the force which is produced by the electromagnetism part in the heat energy and electromagnetic system, so that the low-voltage breaker can open quickly and reduces opening time greatly and improve the breaking capability.

A power saving type information processing apparatus is provided which is not expensive and can provide a high interruption performance without using an expensive and dedicated memory and a complicated software process. After an SDRAM setting register of an SDRAM controller outputs a SELF allowance signal for allowing SDRAM to transfer to a power saving mode from a normal operation mode, a WAITI command fetch detecting circuit outputs a WAITI command detecting signal. In this case, SDRAM is made to transfer to the power saving mode. If a CPU detects an external interruption while SDRAM is in the power saving mode, SDRAM is returned to the normal operation mode irrespective of settings of the SDRAM setting register.

An electrical contact used herein comprises chromium; one of copper and silver; and a carbide, in which the electrical contact comprises a matrix and chromium, the matrix phase mainly comprising one of copper and silver, and the chromium being surrounded by the carbide and dispersed in the matrix. The electrical contact contains 1 to 30 percent by weight of a carbide, with the balance being copper. Another electrical contact contains chromium, copper, and a carbide and has a weight ratio of chromium to the carbide within the range of 1:1.5 to 1:50.

A high voltage switch contact structure capable of interrupting high voltage, high current AC and DC circuits. The contact structure confines the arc created when contacts open to the thin area between two insulating surfaces in intimate contact. This forces the arc into the shape of a thin sheet which loses heat energy far more rapidly than an arc column having a circular cross-section. These high heat losses require a dramatic increase in the voltage required to maintain the arc, thus extinguishing it when the required voltage exceeds the available voltage. The arc extinguishing process with this invention is not dependent on the occurrence of a current zero crossing and, consequently, is capable of rapidly interrupting both AC and DC circuits. The contact structure achieves its high performance without the use of sulfur hexafluoride.

The invention provides a power allocation method for an asymmetric two-way relay channel based on outage probability analysis. The method comprises the following steps: 1) establishing a conventional three-node two-way relay communication system model, and carrying out initialization on each node power; 2) introducing asymmetric factors into the conventional three-node model, and having four kinds of asymmetric situations; 3) calculating system outage probability under the four kinds of asymmetric situations, and making comparison; 4) carrying out segment processing on the outage probability of the system under the downlink asymmetric situation; and 5) with the system outage probability serving as an objective function, and total power serving as constraint conditions, carrying out adaptive power resource allocation according to a power allocation scheme, where the objective function is minimum. The method can allocate power values of the user nodes according to channel state information; the power allocation value is a segmented function related to the asymmetric factors; and the nodes can adjust transmitting power adaptively according to change of the channel states, thereby improving outage performance of the asymmetric channel communication system.

A switchgear having interrupters wherein at least two moving contacts are capable of being open and close with respect to respective fixed contacts. The switchgear comprises a non-earthed metal vacuum chamber enclosing the interrupters therein, a connection conductor for connecting the moving contacts, an operating rod connected to the connecting conductor by means of an insulator and protruding from the non-earthed metal vacuum chamber, a sealing means for sealing the protrusion of the operating rod at the non-earthed metal vacuum chamber, circuit terminals protruding from the non-earthed vacuum chamber, an earth layer surrounding an outer periphery of the insulating mold, and apotential control means. The control means for controlling the potential of the non-earthed metal vacuum chamber is connected between the circuit terminals and is connected to the non-earthed metal vacuum chamber at the intermediate point of the potential control means.

The invention relates to the technical field of wireless communication, in particular to a user pairing and relay selection joint algorithm based on a cooperative non-orthogonal multiple access system. The algorithm comprises the following steps: S1, selecting a user farthest from a base station from all users in the coverage range of the base station as a main user; S2, selecting a repeater with the best channel condition to the main user from all repeaters as a relay; S3, after the main user and the relay are selected, obtaining a user set CR meeting the target rate of the main user in the service range of the relay; S4, selecting a user with the maximum instantaneous rate from the user set CR as a secondary user; and S5, circularly carrying out the steps until all users in the coverage range of the base station complete user pairing and relay selection. The invention provides a user pairing and relay selection joint algorithm of a cooperative non-orthogonal multiple access system in a multi-user and multi-relay scene, a cooperative transmission strategy improves the interruption performance of the whole system, and compared with a traditional relay network, the cooperative transmission method has great advantages in transmission performance.

The invention discloses a multidimensional resource allocation method meeting SWIPT and applied to a bidirectional DF relay system. The method aims at jointly optimizing source end power distribution,a relay signal energy power division ratio and transmission time distribution to improve the interruption performance of a system. The basic idea of the method is as follows: firstly, establishing anoptimization model for minimizing the system outage probability according to a system model, then equivalently converting an original optimization problem for optimizing the outage probability into amaximum normalization signal-to-noise ratio problem, and finally, carrying out dimension reduction processing on the optimization problem and solving a closed-form solution of each resource allocation by combining a two-step optimization algorithm and a scaling method. According to the invention, the complexity of multidimensional resource allocation of the bidirectional DF energy-carrying relaysystem is reduced, and an effective resource allocation scheme is provided for the improvement of interruption performance.

A mold cased circuit breaker, which includes a casing, a switching unit disposed in the casing to open or close an electric circuit, and movable and stationary contactor units present within the casing, includes an arc-extinguishing unit. The arc-extinguishing unit includes a pair of side plates facing each other with being spaced from each other, at least one first grid arranged between the side plates and spaced apart from one another with preset intervals, and a second grid coupled to upper ends of the side plates, spaced apart from the first grid, and having a bent portion with a preset angle.

The invention relates to a control system and a control method of a three-phase brushless direct current motor. The control system comprises a processing chip, the processing chip comprises a processing system and a programmable logic, and the processing system is connected with the programmable logic through a high-speed communication interface; the signal acquisition chip acquires a set electricsignal of the three-phase brushless direct current motor; the programmable logic generates a first interrupt and transmits a set electric signal to the processing system according to the first interrupt, and generates a second interrupt; the processing system performs a setting algorithm on the set electric signal according to the second interrupt so as to generate a pulse width modulation signalto the programmable logic; the programmable logic analyzes the pulse width modulation signal; and the driving chip controls the three-phase brushless direct current motor according to the analyzed pulse width modulation signal. Through the technical scheme of the invention, the function expansion of the control system and the integration of multiple functions are facilitated, so that the controlsystem of the three-phase brushless direct current motor has better compatibility and higher integration level.

A switchgear having interrupters wherein at least two moving contacts are capable of being open and close with respect to respective fixed contacts. The switchgear comprises a non-earthed metal vacuum chamber enclosing the interrupters therein, a connection conductor for connecting the moving contacts, an operating rod connected to the connecting conductor by means of an insulator and protruding from the non-earthed metal vacuum chamber, a sealing means for sealing the protrusion of the operating rod at the non-earthed metal vacuum chamber, circuit terminals protruding from the non-earthed vacuum chamber, an earth layer surrounding an outer periphery of the insulating mold, and a potential control means. The control means for controlling the potential of the non-earthed metal vacuum chamber is connected between the circuit terminals and is connected to the non-earthed metal vacuum chamber at the intermediate point of the potential control means.

The invention discloses a dynamic power allocation method for a multi-relay system based on a nonlinear energy acquisition model, aiming at minimizing the interruption probability of a target node ofthe system, joint optimization is performed on the power division coefficient of each relay node, working under the nonlinear energy acquisition model, and the transmission power, so as to seek an optimal power allocation scheme. The method comprises the following steps: according to channel state information, a signal formula received by each relay node in a first time slot is obtained; power distribution with a proportion of formula is carried out on the received signal of the kth relay node according to two modules of energy acquisition and information reception; the acquired energy formulaof the kth relay node is obtained according to the nonlinear energy acquisition model; the signal formula is transmitted to the target node according to an amplifying-forwarding protocol, so as to obtain a signal formula received by the target node in a second time slot; the instantaneous channel capacity formula of each link is calculated; the system joint outage probability formula is obtainedby calculating the instantaneous channel capacity by using a maximum ratio combining method; a final objective function to be optimized is obtained through equivalent deformation processing once; andthe optimal solution formula is obtained through calculation.