描述
如果启动.停止电机过程中变频器出现过流保护动作，应重新设定加速、减速时间。电机在加、减速时的加速度取决于加速转矩，而变频器在启、制动过程中的频率变化率是用户设定的。若电机转动惯量或电机负载变化，按预先设定的频率变化率升速或减速时，有可能出现加速转矩不够，从而造成电机失速，即电机转速与变频器输出频率不协调，从而造成过电流或过电压。因此，需要根据电机转动惯量和负载合理设定加、减速时间，使变频器的频率变化率能与电机转速变化率相协调。检查此项设定是否合理的方法是先按经验选定加、减速时间进行设定，若在启动过程中出现过流，则可适当延长加速时间；若在制动过程中出现过流，则适当延长减速时间。另一方面，加、减速时间不宜设定太长，时间太长将影响生产效率，特别是频繁启、制动时。系统发生机电共振，可以从电机运转的声音进行判断。采用设置频率跳跃值的方法，可以避开共振点。一般变频器能设定三级跳跃点。V/f控制的变频器驱动异步电机时，在某些频率段，电机的电流、转速会发生振荡，严重时系统无法运行，甚至在加速过程中出现过电流保护使得电机不能正常启动，在电机轻载或转动惯量较小时更为严重。普通变频器均备有频率跨跳功能，用户可以根据系统出现振荡的频率点，在V/f曲线上设置跨跳点及跨跳宽度。当电机加速时可以自动跳过这些频率段，保证系统能够正常运行。电机的转矩输出能力不够，不同品牌的变频器出厂参数设置不同，在相同的条件下，带载能力不同，也可能因变频器控制方法不同，造成电机的带载能力不同；或因系统的输出效率不同，造成带载能力会有所差异。对于这种情况，可以增加转矩提升量的值。如果达不到，可用手动转矩提升功能，不要设定过大，电机这时的温升会增加。如果仍然不行，应改用新的控制方法，比如日立变频器采用V/f比值恒定的方法，启动达不到要求时，改用无速度传感器空间矢量控制方法，它具有更大的转矩输出能力。对于风机和泵类负载，应减少降转矩的曲线值。
产品承诺：
保 证 全新原装进口,
保 证 安全准时发货，
保 证售后服务质量，
优势价格，大量现货。
主营DCS系统配件
机器人系统配件
大型伺服系统配件
品牌：ABB ,AB ,GE,FOXBORO,本特利，英维思，伍德沃德，西屋，瑞恩，施耐德，西门子，摩托罗拉，安川。力士乐。ACSO，横河等进口品牌。 专业销售进口DCS PLC系统备件模块
Triconex Siemens Yaskawa ABB GE Ovation AB Foxboro Motorola Schneider XYCOM KUKA 专业销售进口DCS PLC系统备件模块 15天包退换 一年质保 大量现货 国内实力库存商家
Cognex /DVT LS Legend Line Scan Camera
COGNEX VM16A-203-0075-RB USPP VM16A2030075RB
ALPHASEM COGNEX FRAME GRABBER 8120 CVM9
COGNEX ISS-5400-0000 USPP ISS54000000
Cognex VPM-59432-20GS Vision Module
Cognex In-Sight IS5403-10 XTra Hi-Res Vision CCD Rev B
Cognex In-Sight IS5403-10 XTra Hi-Res Vision CCD Rev A
Cognex Insight IS5403-10 Camera Zoom Lens 5400 Vision
COGNEX 801-8120-01 NSFP 801812001
Cognex Dataman 7550 USB Cordless Handheld DPM ID Reader
COGNEX 200-0091-2 USPP 20000912
COGNEX 805-0010-1 NSFP 80500101
Cognex DataMan ID Reader w/ IDMax DMR-100X-00 NEW 162
Xycom inspection camera video Checkpoint Cognex Towanda
COGNEX 82404/PCI VM26A 203-0109-RB Vision W/CVC-1000
COGNEX 800-5745-1 USPP 80057451
COGNEX 800-5714-1 USPP 80057141
Cognex Insight 5100 with 1400 I/O module and cables
LOT!!! COGNEX IN-SIGHT 1000C, 5100, 5100 CAMERAS LIGHTS
Cognex VM18A 203-0045-R4 vision processor board
COGNEX VME 8200 SERIES VPM-8203x/v-6000 rev.A
COGNEX 800-0035-1 NSFP 80000351
Cognex KV-7100N-PKG-E 7000-0015-01
Cognex In-Sight 1000 DVT 800-5740-1 camera vision NEW
COGNEX 800-5740-1 NSFP 80057401
Cognex 800-5714-1 REV B Controller
Cognex /DVT IS Legend Intelligent Scanner Camera
Cognex 4000-9901 Camera Control Panel Box Enclosure
Cognex VPM-59416-00S Vision System
COGNEX 800-5762-1 NSPP 80057621
Cognex 82403/pci 400MH/64MB Vision Processor Module
COGNEX 807-0004-4 NSPP 80700044
COGNEX IN-SIGHT VISION SYSTEM 800-5809-1 807-9003-1R ++
COGNEX 800-5740-1 USPP 80057401
1 LOT NIB COGNEX ISS-5400-0000 800-5828-1 VISION
Cognex In-Sight 1000, 800-5740-1,camera w/35mm lens
Cognex In-Sight 3000 Camera Controller, 800-5745-1
COGNEX VISION LASER CAMERA VPM-8100LVQ-000-P NEW (NIB)
COGNEX CKR-101-00 USPP CKR10100
Cognex /DVT IS Legend Intelligent Scanner Camera
Cognex In-Sight ISS-5110 W/Cables,software, 1450 Module
COGNEX 800-5741-1 MODEL IN-SIGHT 1000 SENSOR ***XLNT***
Cognex Processor 800-5714-1 Insight camera and lens
COGNEX CDC-200 VISION CAMERA
Cognex In-Sight 5000 IS5000-00 800-5840-4 Vision Sensor
Cognex NotchMax IS5100 IS5100-NMAX-KT00
Cognex Insight 5100 Vision System
COGNEX 800-5760-1 NSFP 80057601
COGNEX 8110-CVM6-32 VM22A 203-0079-RA FRAME GRABBER
COGNEX VPM-8120X-5060 VM28A 801-8130-01K FRAME GRABBER
Cognex MVS 8100 Frame Grabber VPM-8100S-000 Rev A Opt A
COGNEX In-Sight 5400 Vision Sensor+1450 Module/Lens/LED
COGNEX In-Sight 5400 Vision Sensor+1450 Module/Lens/LED
Cognex 4400/VME
Cognex 800-5740-1 In-Sight 1000 Processor Camera System
Cognex In-sight ISS-5400 Rev D Camera W/ 25MM lense
Cognex DVT Legend 542C Color SmartImage Sensor 542 C
CKR-201-002 Cognex Checker 201 with IO Box cable
COGNEX INRK-1503 NSFP INRK1503
Cognex In-sight 1010 800-5749-1 Breakout Module Q new
Cognex Vision Processor Module 800-5758-1 Revision J
Cognex VISION SYSTEM INSIGHT 4000 W/CABLE and IO Module
COGNEX VME 4200 SERIES VPM-4214-01 MACHINE VISION
NEW Cognex In-Sight 5400 Vision System
Cognex VISION SYSTEM INSIGHT 4000 W/CABLE and IO Module
DVT Cognex Legend 510 510M camera machine vision NEW
Cognex In-Sight model 1010 Vision Sensor 800-5749-1
Cognex 8100D Framegrabber – 2 Channel
NEW COGNEX 800-5715-1 CAMERA IN-SIGHT 80057151
NEW COGNEX DVT 535C DVT535C COLOR VISION SYSTEM SENSOR
COGNEX VME 4400 SERIES VPM-4418-002 MACHINE VISION
COGNEX 4400 VM13B REV T VISION PROCESSOR MODULE
COGNEX 8110-CVM6-32 VISION PROCESSOR CARD FRAME GRABBER
Cognex In-Sight model 1000 Vision Sensor 800-5749-1
COGNEX DVT LEGEND 630-C3E40 SMART IMAGE SENSOR CAMERA
Cognex InSight Micro Ethernet I/O Module CIOWENET00 161
COGNEX 800-5715-1 USPP 80057151
COGNEX VISION CONTROL BOARD VPM-8100LX-000 REV:A OPT:A
FUJI VME 4400 VISION CONTROL BOARD FRAME GRABBER COGNEX
Cognex In-sight micro 1020 vision sys camera pn821-0002
Cognex 800-5740-1 Rev. K In-Sight 1000 Processor Camera
COGNEX DMR-100S-00 NSFP DMR100S00
COGNEX 4400 FRAME GRABBER 44124-003 MODULE
COGNEX VPM-8100Q-001-P NSFP VPM8100Q001P
COGNEX LED BackLight Red IARB-040424 24vdc Adv Illu 162
COGNEX 805-0053-3-H NSFP 80500533H
Cognex 200-0024 4400 Video Frame Grabber (VDE BUS Boar
Cognex DVT-SL DVT Smart-Link Display Driver
Cognex Monitor Display Screen CTM-ENET-104
COGNEX 4400 VISION CONTROL BOARD FRAME GRABBER 4438-002
Cognex In-Sight I/O Expansion Module, 800-5758-1
Cognex Dataman DM 7550 LR USB Cordless DPM 2D Reader
COGNEX 4400 BLADE VME-4438-1MX Machine Vision FREE SHIP
Cognex CLM1960 Backlight 119-0082
Cognex CCS CLM-LFV34-00 LFV-34 Coaxial Cube Light new
Cognex LED Light CLM-DFLDR70A-00 119-0099 new
COGNEX VPM-8100LS-000 REV A OPT A
Cognex In-Sight 1701-2
Cognex in sight 1000 vision camera
DVT / COGNEX LEGEND 510MR + TAMRON 25mm LENS + ILLUMNTR
COGNEX VPM-8110Q-5011-P NSPP VPM8110Q5011P
Cognex Dataman DMR-750-00 2D Bar Code Reader
COGNEX MACHINE VISION VME-4418-1MX PROCESSOR MODULE
Cognex In-Sight 4000 Cognex 800-5762-1 Vision Camera
COGNEX DMR-100Q
Cognex CCs PD2-3024-00 New IN Box
COGNEX QRL-090050-66 NSFP QRL09005066
COGNEX CIO-1450 USPP CIO1450
COGNEX 200-0053 USPP 2000053
COGNEX IDIA NSFP IDIA
IDWA COGNEX SMART LIGHT WHITE *NIB*
COGNEX VME 4200 SERIES VPM-4214-01 VISION PROCESSOR #3
COGNEX VME 4200 SERIES VPM-4214-01 VISION PROCESSOR #4
COGNEX VISION I/O EXPANSION MODULE CIO-1450 800-5758-1
Cognex Vision Applied Kinetics model SAZ V6.1 & Camera
Cognex Industrial Flat Panel LCD Monitor CIM-LCD-104
COGNEX IDIA USPP IDIA
Cognex In-Sight 4100 800-5763-1 Rev B
Cognex In-Sight 4100 800-5763-1 Rev 2
cognex checker 101 vision sensor
COGNEX IN-SIGHT 1010 INSPECTION CAMERA SENSOR INSIGHT
COGNEX CLM-4260-00 NSFP CLM426000
COGNEX CLM-2420-00 NSFP CLM242000
Cognex In-Sight 4100 PN: 800-5763-1 Rev E
Cognex CLM 2420 Spot Light
New COGNEX Expansion Module CIO-1400 800-9012-2R
Cognex 2000 VB1 Machine Vision Controller 2002-110
Cognex In-Sight 1700 Automated Wafer ID Reader
COGNEX CHECKER 101 807-0007-2 REV A VISION CAMERA
COGNEX CHECKER 101 807-0007-2 REV C VISION CAMERA
Cognex DM100-IOBOX-000 Expansion Module – NEW
Vision Cognex CLM2420 Spot Light Camera 119-0079
IDRA COGNEX Smart Light Red
COGNEX-INSIGHT VME 4100 SERIES
Cognex Camera Insite 4000
Cognex DVT Ethernet To Serial Converter CON-ETS 161
COGNEX 800-5743-1 NSFP 80057431
COGNEX CKR-IOBOX-101 NSFP CKRIOBOX101
COGNEX LTC08F NSFP LTC08F
Cognex VM18B PC Board
COGNEX VISION SYTEM IN-SIGHT-3400 CAMERA MODULE
COGNEX CVC-1000 USPP CVC1000
Cognex 800-5885-1 I/O Connection Module
COGNEX 800-5743-1 USPP 80057431
Cosmicar Pentax Cognex Lens 6mm 114-0049 F/1.2
COGNEX 800-5712-2A NSPP 80057122A
COGNEX LFC-16F1 NSFP LFC16F1
COGNEX LFC-25F1 NSFP LFC25F1
COGNEX LFC-35F1 NSFP LFC35F1
COGNEX VGA Monitor Board Assembly
Cognex In-Sight 1000 Break Out Breakout Box 800-5743-1
COGNEX 800-5743-1C NEW BREAKOUT MODULE 80057431C
TAMRON (COGNEX) LTC-05Z
Cognex P/N 800-5637-1
COGNEX 800-5712-2A USPP 80057122A
COGNEX 300-0316-100 NSPP 3000316100
CKR-IOBOX-101 Cognex Checker 100 IO Box
CON-IBOB Cognex DVT ISOLATION BREAK-OUT BOARD
CKR-IOBOX-101 Cognex Checker 100 IO Box
CKR-200-IOBOX Cognex Checker 200 IO Box
RVSI COGNEX VISION INTERFACE BOARD
COGNEX 800-5815-1 USPP 80058151
COGNEX 800-5637-1 USPP 80056371
DVT smart light Leds IDRA No cognex
COGNEX 800-5888-2 B NSFP 80058882B
COGNEX CKR-BKTADJE-101-00 NSFP CKRBKTADJE10100
COGNEX DVT Light Kit 500R-LGTKIT
Cognex 014204-020 Machine Vision Overlay Card Imagraph
CDN366-2 & 300-0277-08 COGNEX DEVICENET CONVERTOR&CABLE
PLC模块，可编程控制器，CPU模块，IO模块，AI模块，通讯模块。AB/施耐德/ABB/GE/本特利/西屋/英维斯/霍尼韦尔/黑马/FU克斯波罗
15天包退换 一年质保 大量现货 国内实力库存商家
18150087953 点击拨打电话联系我们