CN201479138U

CN201479138U - Double-optical fiber communication device

Info

Publication number: CN201479138U
Application number: CN2009202328157U
Authority: CN
Inventors: 徐卫东; 钱枢转; 胡东良
Original assignee: Nanjing Tongbu Science & Technology Co Ltd
Current assignee: Nanjing Tongbu Science & Technology Co Ltd
Priority date: 2009-07-22
Filing date: 2009-07-22
Publication date: 2010-05-19
Anticipated expiration: 2019-07-22

Abstract

A double-optical fiber communication device is arranged between the master control of a high voltage frequency converter and a power unit, comprises two bus controller chips, two programmable logic controllers, two photoelectric conversion drivers and two optical fibers, wherein transmission directions of the two optical fibers are opposite, and two ends of each optical fiber are sequentially connected with the photoelectric conversion driver, the bus controller chip and the programmable logic controller. The utility model uses the two optical fibers to realize the bidirectional separation of transmitting and converting data between the master control and the power unit, and solves the problem of disordered data which is easily caused when transmitting and converting data; meanwhile, under the premise of the simplest and easiest control, using two optical fibers can realize the complete and reliable isolation of a control part and a high voltage part, and thereby the communication device has good anti-electromagnetic interference performance and guarantees the effective separation of the forward and reverse information flows. The utility model not only effectively solves the separation problem of strong and weak currents and accurate transmission of signals, but also greatly reduces the system volume and lowers the system cost.

Description

Two optical-fibre communications devices

Technical field

The utility model relates to the high voltage converter technology, relates in particular to transfer of data and exchange between high voltage converter master control and power cell, is a kind of pair of optical-fibre communications device.

Background technology

Because variable-frequency control technique has critical role in national economy and daily life, be the new and high technology of energy savings, also be the international technology field faster of updating, be the integrated technology of high-tech area.In China also is to substitute import, save one of maximum field of investment.Although though there is the mesohigh frequency converter of capable production department of indivedual companies branch model in China, both do not satisfied the developing market demand of telling, existing product also has certain research of technique space at the aspects such as upgrading, steady quality and energy-saving benefit of technology simultaneously, with regard to the world standard in present technique field, along with the application of computer technology, integrated circuit technique, automatic control technology and new material, new technology, whole industry still is in the high speed development stage of technological progress.Clear and definite regulation in the 11th Five-Year program for the development of science and technology outline that State Council has just issued, the energy and power-saving technology are the developing research directions of our development in science and technology, are important development in science and technology fields in construction resource-conserving, the environmentally friendly society.Promote the development of power-saving technology and realize industrialization, both met the general requirement of Chinese society development, in fact also become a huge industrial market, have the good prospect that attracts people's attention hi-tech development.

In high voltage converter technical development process, the communication problem between master control borad and power cell is subjected to paying close attention to widely always.Traditional solution is based on the electromagnetic isolation and the shielded type cable technology of transformer, its fault-free interface has only sophisticated engineer to design, in addition, beeline between holding wire and the power cell, and good grounding requirement not only makes system become huge, also increased system cost greatly.

Summary of the invention

Problem to be solved in the utility model is: the master control of high voltage converter and the communication problem between power cell, and traditional solution design is complicated, and the technical staff is required height, and the communication system volume is big, the cost height.

The technical solution of the utility model is: two optical-fibre communications devices, be arranged between high voltage converter master control and power cell, comprise double bus controller chip, two FPGA (Field Programmable Gate Array) controllers, two opto-electronic conversion drivers and two optical fiber, two Optical Fiber Transmission directions are opposite, and the optical fiber two ends connect opto-electronic conversion driver, bus control unit chip, programmable logic controller (PLC) successively.

The utility model realizes that by two optical fiber transfer of data is separated with the two-way of exchange between master controls and power cell, can solve incidental data corruption problem in the transfer of data exchange, simultaneously under the prerequisite simple and easy to control of trying one's best, use two optical fiber, realize the reliable fully isolation of control section and high-pressure section, have good anti-electromagnetic interference performance; And guaranteed effective separation of forward and reverse information flow.The utility model adopts fiber optical transceiver spare to realize the transmission of the signal between main control unit and the power cell, has not only solved the isolating problem between the strong and weak electricity and the accurate transmission of signal well, and has dwindled system bulk greatly, has reduced system cost.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the circuit diagram of the utility model opto-electronic conversion driver and fiber section.

Embodiment

As Fig. 1, utility model comprises double bus controller chip, two FPGA (Field Programmable Gate Array) controller FPGA, two opto-electronic conversion drivers and two optical fiber, two Optical Fiber Transmission directions are opposite, and the optical fiber two ends connect opto-electronic conversion driver, bus control unit chip, programmable logic controller (PLC) successively.

The data that send are sent into programmable logic controller (PLC), programmable logic controller (PLC) drives and realizes data buffering, and necessary signal processing such as string conversion etc. to data-signal, the signal of handling enters bus control unit, through forming serial signal after the senior processing procedure such as algorithm, serial electric signal converts serial optical signal to through electrical to optical converter and sends into optical fiber and transmit.At receiving terminal, convert light signal to serial electric signal through optical-electrical converter and send into bus control unit by bus control unit, by bus control unit the signal that some need programmable logic controller (PLC) to solve is sent in the Programmable Logic Controller, programmable logic controller (PLC) drives and realizes necessary signal processings such as string and conversion, data buffering to data-signal again.

Fig. 2 is the circuit diagram for the utility model opto-electronic conversion driver and fiber section, and wherein c1, c2 hold connecting bus controller respectively, and 75451 is signal amplifier, and T-2521 is a transmitting terminal opto-electronic conversion driver, and R-2521 is a receiving terminal opto-electronic conversion driver.

The utility model optical fiber interface divides transmission and receives two kinds, mainly is the conversion of fiber-optic signal and logical signal; Transmission of two optical fiber, a reception, communication are adopted and are received synchronizing clock signals, send the mode of data-signal.

The utility model optical fiber interface communication flow is as follows:

1) master control borad and the optical fiber interface that begins high voltage converter that, just powered on will have a self check process, and whether main detection fiber is normal; 2), master control borad sends information spinner and will comprise PMW waveform modulated pulsewidth time data, and four groups of time datas were arranged in the modulation period;

3), master control borad transmission information is mainly the power model fault message, comprises moment breakdown fault, dc capacitor overvoltage and the under-voltage fault of the overcurrent of overheating fault, IGBT module of module and short trouble, module, the fuse open fault.

The utility model optical fiber interface has reliability design at fiber failure or broken string phenomenon.If receiving is 0 data volume, master control borad can be with this power unit by-pass.For in time finding this problem, design content is as shown in table 1.

Table 1 reliability design

Isolate in order to realize that control section and high-pressure section are reliable fully, adopt optical fiber communication technology between master control borad and the power cell, system has high fail safe, has good anti-electromagnetic interference performance simultaneously.

The utility model adopts respectively independently that optical fiber carries out data transmit-receive, realizes the accurate transmission of the signal between each power cell and the master control borad.It has not only solved voltage isolation, anti-electromagnetic interference problem, and can realize the remote transmission of drive signal.Practice shows, the utility model can effectively transmit master control borad to each power cell control signal, and drive circuit is simple, alleviated the volume and weight of frequency convertor system, reduced the production cost of high voltage converter simultaneously, improved its cost performance, for the extensive use of high voltage converter in industry laid a good foundation.

During two optical fiber communication, break down as one road optical fiber, comprise fiber failure or broken string, another road optical fiber still can be worked, and at this moment can fiber failure be handled timely by not out of order optical fiber notice master control borad, is unlikely to occur serious consequence.

Claims

1. two optical-fibre communications devices, be arranged between high voltage converter master control and power cell, it is characterized in that comprising double bus controller chip, two FPGA (Field Programmable Gate Array) controllers, two opto-electronic conversion drivers and two optical fiber, two Optical Fiber Transmission directions are opposite, and the optical fiber two ends connect opto-electronic conversion driver, bus control unit chip, programmable logic controller (PLC) successively.