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Old 07-26-2011, 05:03 PM   #1
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Inverter control system of the dispersion of electromagnetic interference problems and treatment


Time has taken into account these factors, combined with the type of DCS system design is mature, all l / 0 cards are to meet the CE-EMC electromagnetic compatibility requirements, which increase the overall anti-jamming capability of the system is very beneficial. In the condensate pump drive start / stop, speed, speed display and control the amount of running several access signal DCS system, with frequency control of the Dl, DO, Al and AO board layout techniques in the far 43. Hunan Garden power to change the first 25 / 2005 5 speed signal from the DEH and the crew of the cabinet. 3.3 strict I / O cable shielding DCS control system cabinet wiring is the cable head (including the shield connector) arranged side by side near the bottom of the cabinet,herve leger toronto, then the cable core cluster arranged in the cabinet slot in the plastic box and connected to the board card terminal, the shown in Figure 2, the routing process is not sensitive to the interference problem is not the amount of DI and DO, but analog is prone to interference problems, in order to avoid the recurrence of the adverse electromagnetic interference situation, the 6 connected to the drive ends of 2-conductor shielded cable shielding to retain as long as possible, that is exposed outside the shield of the cable core length of not more than 30mm, to avoid the release of electromagnetic interference from the inverter coupled to the control cable and affect the DCS system. Figure 2DCS system wiring diagram inside the cabinet, set in 3.4 will drive to places far away from sensitive equipment, machine No. 3, DCS system cabinet installation instructions in strict accordance with the requirements of equipment to meet the cabinet grounding resistance is less than 2.52Q, and with the auxiliary power system ground as separate as possible to eliminate the interference generated in the system ground; the No. 3 machine cabinet condensate pump installed in the auxiliary power inverter room,Salvatore Ferragamo outlet, away from the machine speed sensor frequency counter sensitive equipment such as straight-line distance of more than 30m, which can further reduce the possibility of sensitive equipment,MBTシューズ 販売店, interference. 4 implementation of results through the implementation of these measures to suppress electromagnetic interference, B Unit 3 condensate pump inverter successfully access XDPS - 400 type of DCS systems, DCS output speed for a given speed and frequency error is less than the two shown 0.59,6, frequency and DCS systems running as usual. On this basis, the use of 4, Unit 1 and Unit 2 small repair overhaul opportunities, respectively, in January 2005, February 2005 and completed in March 44 * 3 units of the condensate pump to change the frequency of control B and access to the DCS system (both XDPS - 400 type), are successful. In addition, in January 2005, members of the village in the Unit 1 power plant overhaul and make Beijing a company's transformation project in the DCS system are successfully added drain pump low frequency (ACS801-0070) access machine DCS system. For the 0 machine, due to I / A'S Model DCS system hardware and software in use, modify and upgrade there are more problems, EMC and cabinet layout and unreasonable terms, with system aging and other factors, to be December 2005 to use the opportunity to overhaul the control system to replace XDPS - 400 based DCS system, then use the opportunity to condensate pump power frequency electromagnetic interference suppression cabinet to implement the measures, I believe condensate pump will be able to change the frequency of success. 5 Conclusion 5.1 to improve the unit's control level, at this stage most of the power plant unit to DCS transformation, the introduction of new production units directly use the DCS control system, to improve the control system anti-jamming capability, the proposed use to meet the EMC requirements system. 5.2 in the sharp rise in fuel costs, power consumption is very tense situation, the choice of energy-saving potential for the implementation of frequency control pumps and fans is significant transformation in the frequency selection, the selection of the EMC standard input and output harmonic and wave low-famous brand, taking the appropriate measures to suppress electromagnetic interference easy to access the success of the DCS system. 5.3 Generally speaking, a robust DCS system and inverter, are done a lot of electromagnetic interference in the work and provide on-site equipment installation guide, user manual if in strict accordance with the installation and use, with DCS inverter drive system is not difficult. 5.4 in some than using the old and the technology behind the unit's DCS control system, frequency control transformation should take full account of the DCS system design and installation to meet EMC requirements, such as can not be determined, it is recommended the two do not butt. References 13 Zeng Yi. Frequency withered speed control system design and maintenance of M]. Shandong: Shandong Science and Technology Press, l999. Author: Wu Mi de (1973 a). Male,Beats By Dre Studio, Guangdong Xin pleasant. Electrical engineers. Engaged in plant maintenance and technical work.
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