PLC控制器6DD2920-0AB0
PLC控制器6DD2920-0AB0
改造之前的提升机电控系统中，电动机采用传统的转子串电阻调速方式，随着电力电子技术的持续发展，该调速方式已经属于非常落后的一种调速技术，面临着被淘汰的局面。该调速方式主要存在以下问题：
（1）提升机频繁启动与制动，在加、减速过程中，转子上所串的电阻会产生严重的能耗，浪费大量电能；
（2）转子串电阻调速系统中，大量电能消耗在转子所串的电阻上，能量以热的形式消耗掉，导致周围环境温度升高、工作环境变差；
（3）转子串电阻调速系统存在控制电路复杂、工作稳定性和可靠性差、缺乏故障诊断功能等问题；
（4）启动时冲击电流大，造成很大的机械冲击，大大降低电动机的使用寿命；
（5）转子串电阻调速系统属于有级调速方式，调速范围窄，调速精度差，爬行时速度不易控制，特别是在重车下放时，需要动力制动、转子串电阻及制动闸瓦配合操作，绞车司机操作困难，不易控制，安全性能差；
（6）转子串电阻调速系统电动机均采用绕线式电动机，存在有滑环接触不良、维护工作量大、维护费用高等缺点。
针对上述问题，矿方经过多方考察生产厂家及现场实际使用情况，最终决定重新采购一套电控系统，电动机采用汇川公司的HD92型四象限高压变频器驱动，彻底替换掉之前使用的调试系统。采用这种新型的电控调速方案，大大提高了整个提升机系统安全可靠性、控制精度及调速性能，在提高用户生产效率的同时，还起到了节能减耗的目的。
PLC控制器6DD2920-0AB0
PLC控制器6DD2920-0AB0
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Time left: 4d 8h leftTuesday, 11PM Newly listedWOODWARD 9905-007 AUTOMATIC POWER TRANSFER & LOAD CONTROL - USED 60 DAY WARRANTY One-day shipping available Newly listedWOODWARD SPM-A 9905-002 M SYNCHRONIZER SERIAL NO 2558695 - USED 60 DAY WARRANTY One-day shipping available Woodward 700 Digital Speed Control 9905-111 Rev L Newly listedWOODWARD 2301A LOW VOLTAGE LOAD SHARING & SPEED CONTROL - USED 60 DAY Woodward 505 Governor Panel WOODWARD 9905-020 P LOAD SHARING & SPEED CONTROL 2301A
Woodward Automatic Power Transfer and Load Con 9905-007 One-day shipping available Woodward 9905-377 Rev B 2301A load sharing & speed control
Woodward Synchronizer - SPM-A Part # 9905-001
Woodward 9905-798 Digital Synchronizer and Load Control 9905798 Rev. J
WOODWARD 2301A LOAD SHARING & SPEED CONTROL 9905-020
WOODWARD 9905-377 REV. 0 SPEED CONTROL SPEED RANGE 2K-6K HZ [USED]
Woodward Automatic Generator Loading Control 9905-096 H - Used Woodward 9905-001 SPM-A SPMA Speed Synchronizer GENERATOR LOADING CONTROL NIB NEW WOODWARD SPM-A SPM 9905-001 GENERATOR GOVERNOR CAT WOODWARD SPM-A SYNCHRONIZER 9905-004 NNB Woodward Controller 9905-090 H, New, Factory Sealed Pkg
WOODWARD PROCESS/IMPORT EXPORT CONTROL 9905-091 NNB Woodward 9905-001 M SPM-A synchronizer
WOODWARD 9905-020 *USED*
WOODWARD AUTOMATIC GENERATOR LOAD CONTROL 9905-096 GENERATOR GOVERNOR CAT WOODWARD SPM-A (9905-001) SYNCHRONIZER WITH MANUAL USED WOODWARD SPM-A SPM 9905-003 GENERATOR GOVERNOR CAT Woodward 9905-020 P Low Voltage 2301A Load Sharing & Speed Control 9905020
NEW WOODWARD DSLC 9905-795 DIGITAL SYNCHRONIZER LOAD CONTROL Woodward 9905-007 automatic power transfer/load control
Woodward SPM-A Synchronizer / Part # 9905-001 Woodward 9905-003 SPM-A synchronizer NIB NEW WOODWARD LOAD SHARING MODULE 9905-173 ANALOG 120 WOODWARD GOVERNOR 9905-001 L SPEED SYNCHRONIZER 9905-096 WOODWARD AUTOMATIC GENERATOR LOADING CONTROL WOODWARD 9905-002L USPP 9905002L WOODWARD 9905-007 USPP 9905007 GOOD USED WOODWARD LOAD SHARING MODULE 9905-339
Woodward 9905-001 M SPM-A Synchronizer 9905001 SPMA One-day shipping available WOODWARD Aptl Auto Power Transfer Load 9905-007 CAT 9905-001 WOODWARD SPM-A SYNCHRONIZER WOODWARD GOVERNOR 505 DIGITAL TURBINE CONTROL PN 9905-699 Woodward 9905-007 automatic power transfer/load control
WOODWARD SPM-A SYNCHRONIZER, PN 9905-005, EXC COND Woodward automatic generator load control 9905-096 H From Singapore Woodward 505 Governor (for a steam turbine Generator) Woodward Low Voltage 2301A Load Sharing Speed Control 9905-068 WOODWARD AUTO POWER TRANSFER & L.C., 9905-007 / 171-057 Woodward X9905-973 bnet 8 channel relay
WOODWARD 9905-760 USPP 9905760 WOODWARD 9905-068C USPP 9905068C WOODWARD 9905-020 USPP 9905020 WOODWARD 9905-001 USPP 9905001 |
PLC控制器6DD2920-0AB0
