45results about How to "Prevent fault propagation" patented technology

The invention discloses an energy consumption module, an offshore wind power flexible DC transmission system, and a fault ride-through strategy applied to the offshore wind power flexible DC transmission system. A DC chopper module is integrated into the MMC of an onshore converter station. The DC chopper module uses a modular arrangement and is connected in series with the SM sub-modules of the MMC. The DC chopper module does not contain capacitor components. When an onshore AC fault occurs in the offshore wind power flexible DC transmission system, the DC voltage rises sharply. A certain number of DC chopper modules (DMs) are introduced to consume surplus power through the energy-consuming resistors to maintain the system's short-term stability. After the fault is removed, the corresponding DMs are removed in order to complete the system fault ride-through. Through the modular arrangement of DMs in a bypass state during normal operation, not only can the precise matching of the surplus power be achieved, the electrical quantity fluctuations of the switching process of the chopper device can be greatly reduced, and fault ride-through and isolation are realized, but also the DM issimple in structure and good in economical efficiency.

This invention relates to a star coupler connected to a plurality of nodes within a network using a time triggered protocol on a time slot basis. The invention further relates to a network including a cluster having at least one node. Further, the invention relates to a method for communication between nodes within a network using a time trigger protocol. To provide a star coupler, which is able to increase the bandwidth and to communicate with low propagation delay for communicating the relevant data it is proposed to provide a star coupler (11) comprising a switch (12) having a plurality of input branches and output branches, wherein a switch controller (13) is provided for controlling the switch (12), further comprising means (14, 15) for deriving knowledge about the protocol timing, which knowledge is used for selectively forward data in a certain time slot to at least one predetermined output.

The invention discloses a modular electrically-excited doubly-salient motor which comprises a shell, stator iron cores, excitation windings, phase-A armature windings, phase-B armature windings, phase-C armature windings, a rotor iron core and a rotary shaft. The shell is made of non-magnetic-permeability materials, and the stator iron cores are fixed to the inner side of the shell; each of the 3X modular stator iron cores is provided with two protruded stator poles which are connected with each other by stator yokes, and the various stator iron cores are not in direct contact with one another; the 6X stator iron cores are peripherally uniformly distributed; 5X protruded rotor poles are uniformly distributed on the rotor iron core; the polar distance between every two corresponding stator poles on the same stator iron core is equal to the polar distance of every corresponding rotor poles; the corresponding excitation winding is wound on one of the stator poles of each stator iron core, the corresponding armature winding is wound on the other stator pole of each stator iron core, and the armature windings are divided into the phase-A armature windings, the phase-B armature windings and the phase-C armature windings according to difference of phases; the X is a positive integer. The modular electrically-excited doubly-salient motor has the advantages that magnetic circuits and circuits of three-phase windings of the modular electrically-excited doubly-salient motor are independent from one another, accordingly, faults can be constrained in one phase, influence of the faults on the other phases can be reduced, and the faults can be prevented from being propagated.

The invention provides an electric roller motor, which at least comprises a rotor core, a shaft, a stator fixing block, an exciting winding, 4X stator cores, a bearing and an armature winding, wherein the electric roller motor is of an outer rotor structure; a transmission belt is directly driven by an outer circumference surface of the rotor core; X is a positive integer; each stator core is provided with two stator poles; the rotor core is provided with 9X rotor poles which protrude inwards; the polar distance between two stator poles on the same stator core is equal to that between the rotor poles; an armature coil along the circumferential direction can be sequentially divided into two phases of windings with an electrical angle of 90 degrees. The two phases of windings of the motor can form two isolated channels, and when one channel is in a fault, the other channel can carry out fault-tolerant operation, so that the reliability of a system is improved and the motor can be used for directly driving a roller.

The invention provides an independent five-phase permanent magnet wind driven generator which comprises a stator core, an outer rotor core, a permanent magnet, an armature winding, a stator fixing block and a shaft. The independent five-phase permanent magnet wind driven generator belongs to the technical field of special motors. 16X inward protruded rotor poles are arranged on the outer rotor core of a motor; X is a positive integer; 16X rotor poles are uniformly distributed; the stator core is equipped with 5X sub-cores in total; each sub-core is equipped with three stator poles; the pole arc length of the stator pole on the middle position is 1.53 times of the pole arc length of the rotor; the stator pole width on the two sides is equal to the rotor pole width; and permanent magnets are embedded between the stator pole on the middle position and the stator poles on the two sides on the sub-cores. According to the invention, the sub-stator cores of the motor are independent from each other, so that the windings wound on the stator poles are separated from each other. When one phase is in fault, the other windings can run in a fault-tolerant form, so that the reliability of the system can be increased.

The invention discloses a fault isolation device, a DC boosting device and an inversion device, which belong to the technical field of power supplies. The fault isolation device comprises a controllerand a circuit breaker. When the circuit breaker is located on a bus connected with a certain DC/DC conversion unit, if the voltage acquired by a first voltage acquisition end is a negative value, input or output of the DC/DC conversion unit is indicated to be reversely connected, and at the moment, a circuit breaker is controlled to be disconnected, so that the DC/DC conversion unit can be prevented from being connected in series with other DC/DC conversion units connected in parallel. If the voltage acquired by the first voltage acquisition end is low and the current acquired by a current acquisition end is large, the DC/DC conversion unit is short-circuited, and at the moment, the circuit breaker is controlled to be disconnected, so that the situation in which other assemblies connectedwith the DC/DC conversion unit in series flow back energy to the DC/DC conversion unit can also be avoided.

The invention discloses a high-reliability six-phase isolated permanent magnet motor for a start-stop system and belongs to the technical field of vehicle motors. The motor comprises stator iron cores, a rotor iron core, permanent magnets, six-phase armature windings, a stator fixing block, a shell and a shaft; The rotor iron core is formed by stacking and pressing silicon steel sheets; ten convex rotor poles are uniformly distributed on the circumference of the rotor iron core; the pole arc length of each rotor pole accounts for a half of the polar distance of each rotor pole; each stator iron core is formed by three E-shaped sub iron cores; and each E-shaped sub iron core is provided with three stator poles, wherein the pole arc mechanical angle of the middle stator pole is 18 degrees, and the pole arc mechanical angles of the stator poles on the two sides are 12 degrees. According to the technology, one centralized excitation winding can be utilized to excite two armature windings; the armature windings can be divided into six phases according to different phase positions, the isolation performance of each-phase winding is good, and the reliability is high; and in addition, the motor provided by the invention can run as a power generator and also run as an electric motor.

The invention provides a modular motor for pre-winding high-slot full-rate winding of an electric vehicle, belonging to the technical field of automobile motors. Characterized by comprising a convex lens-shaped iron core, a non-magnetically conductive rotor iron core, a stator iron core, an excitation winding, an armature winding, etc., wherein the stator iron core has 6X stator poles of equal width on the inner side thereof, X is a positive integer, and the non-magnetically conductive rotor iron core has 4X circular arc grooves. The circular arc groove is embedded with a convex lens-shaped iron core formed by stacking silicon steel sheets, an excitation winding is wound on the stator iron core every other stator pole, an armature winding is wound on the other stator poles, a planar permanent magnet is embedded in the yoke connecting the two stator poles, and the permanent magnet has an included angle of 45 degrees with the circular arc tangential direction. The technology of the invention can realize that after the pre-wound winding is embedded on the broken stator pole, the stator core is bent into a circle and put into the motor housing.

The invention provides a short magnetic circuit short torque winding motor of an electric vehicle, belonging to the technical field of automobile motors. The short magnetic circuit short torque winding motor is characterized by comprising a sector core, a cast aluminum rotor, a stator core, excitation windings, armature windings, and a shaft, wherein the stator core is internally provided with 12Xstator poles of equal width, X is a positive integer, a sector groove of the cast aluminum rotor is internally embedded with a magnetically conductive sector core, the bottom of the sector core is provided with a plurality of dovetail-shaped bulges, both the excitation windings and the armature windings are centralized short torque windings, one excitation winding is wound on the stator core every two stator poles, and the armature winding is wound on a stator pole between two excitation windings. The short magnetic circuit motor is low in iron loss under identical magnetic density; the windings are short torque windings, so that a lot of copper material is saved, the generator produces less heat but works more efficiently; only one phase of winding is outside each stator tooth of the motor, windings are not overlaid, slots are used more efficiently, and slot fill factor is high.

The invention provides an excitation fault tolerant running electric drum motor, comprising a drum shell, an outer rotor core, a stator core, an excitation winding, an armature winding and a shaft, and belonging to the technical field of special motors. The outer rotor core is fixed on the drum shell, and 10 convex rotor poles are uniformly distributed on an outer rotor; the stator core is composed of three sector sub cores, and each sub core is provided with two armature stator poles and an excitation stator pole; the pole arc mechanical angles of the rotor poles are 18 degrees, the pole arc mechanical angles of the armature stator poles are 17 degrees, and the pole arc mechanical angle of the excitation stator pole is 34 degrees. The electric drum motor is an electric excitation double-salient motor, can run in a switched reluctance working mode when the excitation winding cannot work normally, and ensures the reliability of an electric drum without increasing the size, weight and structural complexity of the motor.

The invention provides a double-mode magnetic resistance motor, which comprises a stator iron core, an outer rotor iron core, an exciting winding, an armature winding, a stator isolation block and a shaft and belongs to the technical field of a special motor. 16 uniformly distributed rotor poles are arranged on the outer rotor iron core; the stator iron core consists of six fan-shaped iron cores; the fan-shaped edge of each fan-shaped iron core is provided with two armature stator poles; the pole arc mechanical angle of each armature stator pole is 9 degrees. The exciting winding in the double-mode magnetic resistance motor is not electrified; the motor realizes electric or power generation operation in a work mode of switching on or switching off the magnetic resistance motor; the exciting winding is electrified; the motor realizes the electric or power generation operation in a work mode of electrically exciting a double-convex-pole motor. Meanwhile, according to the technology, the stator isolation block does not conduct magnetism, so that the coupling between stator sub iron cores is small; in addition, the motor is an integrated winding permanent magnet motor, so that the magnetic path is short; the copper loss and iron loss consumption is low; the efficiency is high.

The invention provides an electric vehicle short magnetic circuit rare earth-free permanent magnet motor, and belongs to the technical field of automobile motors. the motor comprises a convex lens-shaped iron core, a non-magnetically conductive rotor iron core, a stator iron core, an excitation winding, an armature winding, a screw, a tablet and a shaft, wherein the stator iron core has 12 statorpoles of equal width on the inner side thereof; The non-magnetic conductive rotor core is located on the inner side of the stator core and fixed on the shaft; The non-permeable rotor core has seven circular arc grooves. A convex lens-shaped iron core capable of conducting magnetic field is embedded in the circular arc-shaped groove, and the excitation winding and the armature winding are all centralized short-moment windings; an excitation winding is wound on every other stator pole of the stator iron core, and the armature winding is wound on the other stator poles. The technology of the invention is a short magnetic circuit motor, and the iron loss is small under the same magnetic density; the rare earth permanent magnet material is not used to save rare earth resources.

The invention discloses a measurement test system for a two-port component between any two points, which comprises a power supply part, a control part, an action part, a measurement test part and an external interface, wherein the power supply part comprises an AC/DC power supply module and a multi-path DC/DC isolation power supply module; the control part comprises an operation display module, acontrol storage module and an isolation and driving module; the external interface is a connector in a related form; the action part comprises a measurement test point switching module and an analog signal switching module; and the measurement test part comprises an AD acquisition processing module and a voltage and reference module. According to the invention, through the design of the measurement test point switching module and the analog signal switching module, the scale of the measurement test point switching module can be randomly expanded according to the requirements of a user, and theautomatic measurement test function of a two-port component between any two points is realized; due to the design of the measurement test point switching module, the function of switching among the most measurement test points at will is achieved through the least switches, and due to the design of the analog signal switching module, switching between the positive excitation signal and the negative excitation signal between any two measurement test points is achieved.

The invention provides a high-reluctance torque driving motor of a hybrid electric vehicle, and belongs to the technical field of vehicle motors. The permanent magnet synchronous motor is characterized by comprising a stator iron core, permanent magnets, armature windings, a multi-tooth-shaped block rotor, a magnetism adjusting winding, a non-magnetic-conductive rotor iron core and a shaft; 12 stator poles with the same width are arranged on the inner side of the stator iron core, and 8 multi-tooth-shaped block rotor iron cores capable of conducting magnetism are placed in the arc-shaped groove of the non-magnetic-conducting rotor; one magnetism adjusting winding is wound on the stator iron core every other stator pole, and armature windings are wound on the rest stator poles; a permanentmagnet is embedded in the middle of the pole body of the stator pole wound with the magnetism regulating winding; and the multi-tooth-shaped block rotor iron core is obtained by cutting a plurality ofU-shaped grooves in an outer arc line of the block rotor iron core, and each tooth groove of the multi-tooth-shaped block rotor iron core is filled with a non-magnetic light material. The multi-tooth-shaped block rotor iron core has the advantages that the multi-tooth-shaped block rotor iron core can change an air gap magnetic field of a motor, weaken harmonic waves in counter electromotive forceand reduce torque pulsation of the motor; and the embedded permanent magnet can improve the reluctance torque component of the motor.

The invention discloses a wireless distributed LED traffic guidance screen system. Including a coordinator (103), multiple routing display nodes (101), multiple terminal display nodes (102), a control module (104) and a communication module (105); the coordinator (103) and multiple routing display nodes Between the nodes (101), two-way wireless communication is performed between multiple routing display nodes (101) and multiple terminal display nodes (102); a serial port of the control module (104) is connected to the coordinator (103), and the control module Another serial port of (104) is connected with communication module (105). The display screen of the present invention is divided into multiple independent sub-areas, and the distributed control of each sub-area by ZigBee wireless network is used to enhance the reliability of the system; the data throughput is shared on multiple CPUs, and the performance requirements for a single CPU are significantly The system stability is improved, and the hardware structure of all nodes is the same, which improves the versatility and interchangeability of circuit boards, and reduces the cost of printed circuit board manufacturing.

The invention discloses a protection circuit of a single channel direct current electromagnet and a control method.The protection circuit comprises an electromagnet driving circuit, a signal conditioning circuit, a switch circuit and a microcontroller, wherein the electromagnet driving circuit is connected with a switch protection circuit, the signal conditioning circuit and the microcontroller, receives driving signals of the microcontroller and drives an electromagnet EM to work; the signal conditioning circuit is connected with the microcontroller, collects voltage signals in the electromagnet driving circuit and outputs the voltage signals to the microcontroller; the switch circuit is connected with the microcontroller and switches on or switches off a power supply switch of the electromagnet EM under the control of the microcontroller; and the microcontroller sends pulse width modulation (PWM) driving signals to the electromagnet driving circuit, receives the voltage signals sent by the signal conditioning circuit and sends switch control signals to the switch circuit.The fault type can be detected quickly in first time after the occurrence of faults, the power supply is cut off timely before the electromagnet EM overheats, the safety of a power utilization device is guaranteed, and property damage and causality accidents are avoided.

The invention provides a permanent magnet wheel hub motor of a somatosensory vehicle, and belongs to the technical field of electric vehicles. The permanent magnet wheel hub motor comprises an outer rotor iron core, a stator iron core, a permanent magnet, an armature winding, pole shoes and a shaft, wherein 8X convex rotor poles are uniformly distributed at the inner side of the outer rotor iron core, and X is a natural number; the length of a pole arc of each rotor pole is equal to one half of the pole distance of the corresponding rotor pole; the stator iron core consists of 3X fan-shaped auxiliary iron cores, and each auxiliary iron core is provided with two armature stator poles and one permanent magnet stator pole; an armature permanent magnet is fixedly arranged on each permanent magnet stator pole, and each pole shoe is fixedly arranged at the outer side of the corresponding permanent magnet; the 3X permanent magnets are magnetized in the radial direction, and the magnetizing directions are the same. The permanent magnet wheel hub motor has the advantages that the auxiliary iron cores of the stator are mutually isolated, so that the stator-phase windings are mutually isolated in physical and electromagnetic modes, thereby greatly reducing the possibility of inter-phase faults; by utilizing the pole arc matching relationship of the stator and the rotor, the total magnetic chain change rate of the two windings with the same phase is not changed, and the characteristics of the two windings are mutually complemented.