CN1885749A - Novel communication network topology structure for power electronic system - Google Patents
Novel communication network topology structure for power electronic system Download PDFInfo
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- CN1885749A CN1885749A CNA2006100508048A CN200610050804A CN1885749A CN 1885749 A CN1885749 A CN 1885749A CN A2006100508048 A CNA2006100508048 A CN A2006100508048A CN 200610050804 A CN200610050804 A CN 200610050804A CN 1885749 A CN1885749 A CN 1885749A
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Abstract
The related communication network topology for complex electric and electronic system comprises: the node unit with a controller, a signal transmitter and receiver, a selection switch, and a fiber transmitter and receiver; and the communication media, wherein the node should be defined into the main and inferior ones. This invention has well intelligence, can increase transmission speed greatly, and reduces network cost.
Description
Technical field
The invention belongs to communication network system, relates to being applied to the integrated communication network topological structure of complicated medium-and-large-sized power power electronic system.
Background technology
At present, the control structure of general digital power controlling converter is still underused the advantage of digital communication.Distributed digital Control Network structure is the integrated direction of complicated medium-and-large-sized power power electronic system.Recently, a kind of emerging modular phase bridge network topology that has daisy chain structure receives much concern.The known network topology is based on the daisy chain looped network, network configuration is simple, network communication speed is higher, be suitable for the converters device that real-time is had relatively high expectations, the power electronics complication system can be realized distributed control based on this Control Network structure, and suitable controlling platform is provided for complicated power electronic system is integrated.This network is the elementary cell of network communication with the cell node, and every cell node is realized the function control based on the power electronics standard module of the system integration as the hardware control of bottom standard module, is promptly realized the basic function of standard module.This network greatly reduces cost, and is fit to adopt the transmission medium in emerging forward position.
But, this annular communication network structural topology also has the deadly defect that the itself network characteristic is brought except above-mentioned advantage, promptly whole network will have cumulative delay and exist, cause the synchronizing characteristics variation of Real Time Control Function, cause the power electronic system operation troubles.In addition, this network configuration is because signal all needs process optical fiber receiving converter through each node the time, the node signal receiver, Node Controller, node signal transmitter and optical fiber send transducer, and the node of signal process cumulative delay is many more more at most, real network communication channel capacity reduces greatly, therefore the network use occasion is restricted, and particularly the switching frequency power electronic system of having relatively high expectations is not suitable for adopting this network, and promptly network universality can be poor.
Therefore be necessary to invent a kind of network configuration that has the higher channel capacity and can solve stationary problem, make new network can keep characteristics simple in structure and that communication speed is high, and can reduce to accumulate the communication time-delay greatly.
The content of innovation and creation
The invention provides a kind of high-speed intelligent communication network topological structure of novelty, both kept existing network simple in structure, communication speed is high, be applicable to whole advantages such as the system integration based on the power electronics standard module, network topology of the present invention can reduce the Network Transmission cumulative delay greatly simultaneously, increase channel capacity, make the application scenario of network obtain expanding, can effectively overcome the weak point that prior art exists.
For achieving the above object, the technical scheme taked of the invention: this high-speed intelligent communication network is made of elementary cell network node and optical-fibre communications medium.Starting point that network node receives and sends as the signal in this intelligent high-speed communication network and terminal point, intermediate conveyor point.Network signal transmission medium optical fiber is as the medium of the connection between this network node unit, the transmission of bearer network signal.Network node unit inside, Node Controller (130) is connected with node signal transmitter (140) and node signal receiver (150), and control sends the mode of operation of signal selecting switch (160); Fiber optic transmitter (170) is connected with transmission signal selecting switch (160) and node signal transmitter (140); Fiber optic receiver (180) is connected with node signal receiver (150) and transmission signal selecting switch (160).This network base units (network node) comprises the data that a Node Controller is controlled the mode of operation of this node sender unit and signal receiver and sent and receive each node, finishes the communication with other node; If this node is defined as network host node, this network node controller is born the data communication task with last hierarchical network in addition.This network base units (network node) comprises that the node signal transmitter will obtain sending data according to the mode of operation order from Node Controller, is converted to the serial differential signal mode and sends.This network base units (network node) comprises that the node signal receiver will be converted to parallel signal and reception from the serial signal of fiber optic receiver.This this network base units (network node) comprises the selector switch of transmission signal selecting switch as the transmission signal of fiber optic transmitter, determines the transmission signal source of this node.It is light signal with electrical signal conversion that this network base units (network node) comprises fiber optic transmitter, makes it to transmit on the optical fiber medium.This network base units (network node) fiber optic receiver will be converted to the signal of telecommunication from the light signal of optical fiber.
The remarkable advantage of the invention:
A kind of high-speed intelligent communication network topology based on the power electronics standard module, the data of each cell node transmission source can be selected according to this unit current state in its network, be that the transmission signal source that the optical fiber of each node sends transducer is controlled by switch, promptly can be directly from the optical fiber receiving converter or the direct Node Controller of this node from this node.This intelligent communication network can improve the transmission speed of data on network greatly, reduce transmission delay, can significantly shorten communication cycle, reduce the influence that caused by the loop network cumulative delay, better solve the stationary problem that is brought by the loop network self character in the power electronics high speed communication; This network has increased the network channel capacity greatly, has expanded the use occasion of this communication network, and is suitable equally to the occasion that the switch frequency requirement is higher; This network configuration is simple, can significantly reduce the production cost of optical fiber communication network.
Description of drawings
Fig. 1 is existing typical daisy chain loop network topological structure schematic diagram;
Fig. 2 is the existing loop network schematic diagram of four network nodes based on daisy chain loop network topology that comprise;
Fig. 3 comprises the high-speed intelligent loop network schematic diagram of four network nodes for the invention;
Fig. 4 is comprising three schematic diagrames that are accumulated to transmission delay when receiving terminal point from the known loop network of node for synchronizing signal;
Fig. 5 is the schematic diagram of the transmission delay of the invention high-speed intelligent loop network synchronizing signal when comprising that three synchronizing signal arrive to receive terminal point from the structure of node;
Fig. 6 is the formation schematic diagram of each cell node in the invention high-speed intelligent loop network.
Embodiment
Fig. 3 has shown the structure diagram of the communication network topology of the high isolation performance of the invention intelligent high-speed.This intelligent high-speed communication network comprises network node unit 110, network signal transmission medium optical fiber 120.Network node unit comprises Node Controller 130, node signal transmitter 140, and node signal receiver 150 sends signal selecting switch 160, fiber optic transmitter 170, fiber optic receiver 180.Network node unit inside, Node Controller (130) is connected with node signal transmitter (140) and node signal receiver (150), and control sends the mode of operation of signal selecting switch (160); Fiber optic transmitter (170) is connected with transmission signal selecting switch (160) and node signal transmitter (140); Fiber optic receiver (180) is connected with node signal receiver (150) and transmission signal selecting switch (160).In an embodiment, network signal transmission medium optical fiber 120 adopts the single mode plastic fiber.Node Controller 130 adopts the Cyclone of U.S. Altera
TMSeries FPGA.Node signal transmitter 140 adopts the TAXIchip of U.S. Advanced Micro Devices
TMAsynchronous transmission device AM7968.Node signal transmitter 150 adopts the TAXIchip of U.S. Advanced Micro Devices
TMAsynchronous receiver AM7969.Sending signal selecting switch 160 adopts by Node Controller according to receiving the signal source that this node of order control optical fiber sends transducer.Optical fiber sends transducer 170 employings signal is changed to light by electricity.The communication speed that optical fiber sends transducer 170 employing U.S. Agilent companies is the device of 125Mbps, and model is HFBR 1.It is the device of 125Mbps that signal is adopted the communication speed of Agilent company by light to electricity conversion optical fiber receiving converter 180, and model is HFBR-2526.Network node unit 110, the elementary cell of formation network is as starting point, terminal point and the intermediate conveyor point of reception of the signal in this intelligent high-speed communication network and transmission; Network signal transmission medium optical fiber 120 connects each node unit of network, the transmission of bearer network signal, and high noiseproof feature is provided; The FPGA Node Controller 130 that network node unit comprises, control the mode of operation of the sender unit and the signal receiver of this node, sending and receive the data of each node, is that each node successfully receives data and sends the control core of data, thereby finishes the communication with other nodes.If this node is defined as network host node, then this Node Controller is also born the data communication task with last hierarchical network; The AM7968 node signal transmitter 140 that network node unit comprises will obtain sending data according to the mode of operation order from Node Controller, be converted to the serial differential signal mode and send; The AM7969 node signal receiver 150 that network node unit comprises will be converted to parallel signal and reception from the serial signal of fiber optic receiver; The transmission signal selecting switch 160 that network node unit comprises as the selector switch of the transmission signal of fiber optic transmitter, is determined the transmission signal source of this node; The fiber optic transmitter 170 that network node unit comprises is a light signal with electrical signal conversion, makes it to transmit on the optical fiber medium; The fiber optic receiver 180 that network node unit comprises will be converted to the signal of telecommunication from the light signal of optical fiber.Be signal individual event flow network structure shown in Fig. 3, utilize this loop configuration can also constitute signal two-way flow network configuration in addition, accept the number of transducer and need double but signal sends transducer and signal, the network configuration cost improves.In addition, provided the intelligent high-speed network structure that comprises four communication nodes among Fig. 3, general according to the complexity of power electronics application system and the number of system standard module, the network node number is configurable.Hierarchical control principle according to the power electronics complication system, this layer network is as the communication network between hardware control in the complicated power electronic system hardware controls layer, and the normal operation of the common control management system bottom of hardware controls layer module must be carried out communication with last layer (system administration manager).Therefore the communication host node is set in the hardware Communication Layer usually, as the application management layer, the communication of hardware management layer controller and system administration manager and exchanges data, and host node and each constitute single host node power electronics high-speed intelligent communication network as hardware control from node unit.
Network work process of the present invention and this new network and former network cumulative delay time ratio being analyzed as follows.In this networking process of analysis, based on concrete application scenario, generally all set single master network host node and many main and subordinate nodes, therefore suppose that based on the intelligent network of Fig. 3 structure one of them node is a host node, all the other are from node, be applied to typical power electronics three-phase system (supposition defines data as required: command frame, Frame, synchronization frame):
Command frame is sent to from node by host node, and when this frame arrived from node through the optical fiber receiving converter, this Frame sent transducer by controller and the optical fiber that two passages arrive each node respectively.Contrast with former communication network topology, data arrive the next string-also that need not during from node through last node, parallel-serial converter and Node Controller, but directly send the transducer serial transmission to next node from optical fiber, the transfer of data time-delay can reduce greatly, save the transmission time, therefore can shorten communication cycle greatly.Host node sends Frame, and network switching is still determined information source according to former direction.After receiving data-signal from Node Controller, produce pwm signal according to synchronizing information.Host node sends the synchronizing sequence frame, because the transceiver mode of synchronizing sequence is the same with above-mentioned pattern, so the transmission delay of synchronizing sequence dwindles greatly.As shown in Figure 4 and Figure 5, sending the synchronization frame instruction with host node is example, and compared intelligent communication network that former communication network and the present invention propose each receives the time-delay of synchronic command from node.Fig. 4 is the pattern that communication network respectively receives synch command in the prior art from node, and Fig. 5 is high-speed intelligent communication network of the present invention respectively receives synch command from node a pattern.The synchronizing sequence address of Fig. 4 Central Plains last receiving node of network topology is placed on first transmission position of whole synchronizing sequence, comes the relieve transmission time-delay with this.The new network configuration that adopts among Fig. 5 also can make the transmission lag phenomenon of each node be eased by the method.By network topology of the present invention, the transmission delay of data in network reduces greatly, improved the bandwidth of system, communication cycle reduces greatly, the system switching frequency can both obtain mutually deserved increasing substantially with dynamic response, enlarged the communication network application scenario, reduced greatly because the influence that the switching frequency restriction is brought.
As the system among Fig. 4, synchronic command and address field arrive its corresponding during from node must through this before the node from node, therefore concerning each receiving node, after sending instruction, host node receives this instruction to this node, the time-delay that exists its front node to receive and send, itself and host node are apart from far away more, and then corresponding delay is also long more.And the system among Fig. 5 of the present invention, when host node sent instruction to receiving node, in the loop network path of optical fiber, data did not need reception and the transmission through its front node to data when arriving destination node all the time.Therefore two networks relatively, obviously, the node of network of the present invention receives time-delay that host node sends data than little many of existing network.When host node need be from certain from the node image data, should the optical fiber of this node be sent the transducer data source from Node Controller and switch to controller.System network can make up dicyclo and monocycle, and the single loop network information flow can only upwards flow at folk prescription, and high many but the cost of double loop network is wanted, each node needs two to send and receiving converter.This network sends the data source of transducer by selecting flexibly node optical fiber, the transmission delay when having shortened host node as application controller equally greatly.
Power electronic system real-time height will make up the intelligent standard module, needs communication network at a high speed to be complementary with it.
Estimate the network channel capacity according to the system switching frequency below.Each switch periods supposes that control algolithm that host node is carried out needs the voltage and current value of feedback of each module, and the channel capacity C that communication network needs can be approximated to be following formula:
C＝N
var/node*n
n*n
b*f
sw*(1+k
oh) (1)
C is a channel capacity in the above-mentioned formula, n
nFor system from node number, n
bThe figure place of each word length, f
SwThe system switching frequency, k
OhThe frame head data position (generally getting 50%) of following each Frame to send, N
Var/nodeThe variable number that need transmit for each node.Usually, the precision of A/D converter is 8 to 12.Minimum channel capacity supposes that with a simple three-phase system be standard, and three from node, each node needs four variablees, the switching frequency of 8 bit data precision and 10K is set 50% frame head data position, and the minimum data capacity that can obtain C is 1.44M/s.Relate to complicated system,, suppose 10 variablees of each node, have 6 nodes altogether as six phase frequency conversion speed-adjusting systems, 12 precision, switching frequency is 50K, same frame head data position, can get required communication data bandwidth is 54Mb/s.
Based on above-mentioned discussion and analysis, bandwidth chahnel is necessary for 1.5Mb/s at least, but such communication system use occasion is very narrow and small.The ability to communicate of 100Mb/s will make that the design of system is more flexible, can be applied to the occasion of multiple different demands, have relatively high expectations and will have suitable equally than the occasion of high dynamic response demand for switching frequency.
The present invention is from analyzing basic loop network structure, proposed a kind of high-speed intelligent communication network topology based on electric power electronic module, the data that this topological great advantage is each communication unit send the source and can select according to the current state of this unit.This communication network can improve the transmission speed of data on network greatly, thereby reduce transmission delay, can better solve the stationary problem that is brought by the loop network self character in the power electronics high speed communication, also the cost that reduces optical fiber communication network played great facilitation.
Though with regard to present preferred embodiment explanation the present invention, should be appreciated that these description should not be construed as restricted meaning.Be familiar with present technique field person and after reading above description, will appreciate that numerous replacement schemes and modification without doubt.Therefore, pre-interim claims scope is to be illustrated as all replacement schemes and the modification that is encompassed in true spirit of the present invention and the scope.
Claims (10)
1, a kind of communication network topological structure that is used for power electronic system, with the network node unit is the elementary cell of network communication, it is characterized in that network node unit comprises Node Controller, node signal transmitter, node signal receiver, sends signal selecting switch, fiber optic transmitter and fiber optic receiver.
2, by the described communication network topological structure of claim 1, it is characterized in that, each node unit of network (110) is connected by network signal transmission medium optical fiber (120); Network node unit inside, Node Controller (130) is connected with node signal transmitter (140) and node signal receiver (150), and control sends the mode of operation of signal selecting switch (160); Fiber optic transmitter (170) is connected with transmission signal selecting switch (160) and node signal transmitter (140); Optical fiber receives (180) and is connected with node signal receiver (150) and transmission signal selecting switch (160); Node Controller (130) wherein, control the mode of operation of the sender unit and the signal receiver of this node, send and receive the data of each node, if this node is defined as network host node, then this Node Controller is also born the data communication with upper layer network; Node signal transmitter (140) will obtain sending data according to the mode of operation order from Node Controller, be converted to the serial differential signal mode and send; Node signal receiver (150) will be converted to parallel signal and reception from the serial signal of fiber optic receiver; As the selector switch (160) of the transmission signal of fiber optic transmitter, determine the transmission signal source of this node; Fiber optic transmitter (170) is a light signal with electrical signal conversion, makes it to transmit on the optical fiber medium; Fiber optic receiver (180) will be converted to the signal of telecommunication from the light signal of optical fiber.
3,, it is characterized in that by the described communication network topological structure of claim 1: node signal transmitter (140) adopt band also-string encoding functional chip series, node signal receiver (150) adopts the corresponding string of band-and decoding function chip series.
4, by the described communication network topology structure of claim 1, it is characterized in that: node signal transmitter (140) and node signal receiver (150) adopt TAXIchip respectively
TMSeries asynchronous transmission and receiving chip.
5, by the described communication network topology structure of claim 1, it is characterized in that: signal enters optical fiber recipient (180), needs through two corridor diversions at this network node.
6,, it is characterized in that by the described communication network topology structure of claim 1: when signal arrives destination node, through the band string-and the node signal receiver (150) of decoding function receive by the Node Controller (130) of this node unit.
7,, it is characterized in that by the described communication network topological structure of claim 1: signal before arriving destination node, through the band string-and the node signal receiver (150) of decoding function receive by the Node Controller (130) of this node unit and keep or abandon.
8, by the described communication network topology structure of claim 1, it is characterized in that: send signal selecting switch (160), the state of this switch is determined according to communications protocol and signal particular type.
9, by the described communication network topology structure of claim 1, it is characterized in that: signal in loop network, arrived the next direct fiber optic receiver (180) from a last fiber optic receiver from node (180) and fiber optic transmitter (170) serial transmission to next node during from node from last from the node fiber optic receiver before arriving destination node.
10, by the described communication network topology structure of claim 1, it is characterized in that: signal, is converted to the serial differential signal with parallel signal and sends through node signal transmitter 140 from Node Controller; Signal sends transducer through optical fiber, is light signal by electrical signal conversion, enters the optical fiber medium; Signal enters next node optical fiber receiving converter through the optical fiber medium, and signal is converted to the signal of telecommunication again, enters this node; The signal source of this node fiber optic transmitter determines by signal selecting switch, promptly can be from the Node Controller of this section point or from the transmission signal of the received last node of the fiber optic receiver of this node.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158336A (en) * | 2011-04-04 | 2011-08-17 | 浙江大学 | Multi-channel isolated high-speed intelligent transmitting-receiving device and method for power electronic system |
| CN103782549A (en) * | 2011-07-20 | 2014-05-07 | 泰雷兹公司 | Information transmission network and corresponding network node |
| CN104484306A (en) * | 2014-12-31 | 2015-04-01 | 哈尔滨工业大学 | Master-slave synchronous serial communication bus based on differential signal and realization method of master-slave synchronous serial communication bus |
| CN109360408A (en) * | 2018-08-14 | 2019-02-19 | 深圳芯珑电子技术有限公司 | A kind of data communications method based on plastic optical fiber |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3270837B1 (en) * | 2001-05-15 | 2002-04-02 | 株式会社 総合開発事務所 | Optical communication network |
| CN1221090C (en) * | 2002-07-27 | 2005-09-28 | 华为技术有限公司 | Two-way optical communication apapratus capable of automatically realizing main-backup change |
| CN1190040C (en) * | 2002-09-25 | 2005-02-16 | 北京佳讯飞鸿电气有限责任公司 | Treatment method of user's side equipment fault based on U interface in ring network |
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2006
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158336A (en) * | 2011-04-04 | 2011-08-17 | 浙江大学 | Multi-channel isolated high-speed intelligent transmitting-receiving device and method for power electronic system |
| CN102158336B (en) * | 2011-04-04 | 2013-11-06 | 浙江大学 | Multi-channel isolated high-speed intelligent transmitting-receiving device and method for power electronic system |
| CN103782549A (en) * | 2011-07-20 | 2014-05-07 | 泰雷兹公司 | Information transmission network and corresponding network node |
| CN104484306A (en) * | 2014-12-31 | 2015-04-01 | 哈尔滨工业大学 | Master-slave synchronous serial communication bus based on differential signal and realization method of master-slave synchronous serial communication bus |
| CN104484306B (en) * | 2014-12-31 | 2017-06-20 | 哈尔滨工业大学 | Master-slave synchronisation serial communication bus and its implementation based on differential signal |
| CN109360408A (en) * | 2018-08-14 | 2019-02-19 | 深圳芯珑电子技术有限公司 | A kind of data communications method based on plastic optical fiber |
| CN109360408B (en) * | 2018-08-14 | 2023-06-23 | 深圳芯珑电子技术有限公司 | Data communication method based on plastic optical fiber |
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