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低压变频器的选型步骤

　　主要分为七个步骤：(1)将设备在工作模式、体积和负载类型方面进行确定;(2)将设备在工艺、功能标准和控制要求方面得以确定;(3)将系统在I/O接口、通信接口、组建模式等方面予以明确;(4)概括所有的性能标准以及要求;(5)根据概括而得出的结论做直接招标或者技术咨询;(6)综合性比较使用寿命、价格、性能以及服务等方面;(7)将变频器的型号、规格、品牌和供应商予以明确。

　　低压变频器的选型方法

　　就传动控制系统在常规进行运转方面而言，对通用变频器进行明智的选择是至关重要的，第一，应确定通用变频器进行使用的最终目标，根据生产机械在调速范围、速度响应、类型以及起动转矩、控制精度等方面的要求上，全面分析变频器驱动负载特征，进而决定在选择通用变频器上选用何种功能构成控制的系统，接着确定选用最优的控制形式。确定下来的通用变频器不但能够迎合生产工艺需要，而且符合于技术经济的标准。同时，还要全面关注变频器在生产技术标准、功效、谐波、寿命、功率因数和销售服务等方面是否存在问题，同时，通用变频器持续运行，变频器在输出输入接口、通信指标、类似于直流制动单元以及电抗器等变频器的附件配套方面也是至关重要的。

　　通用变频器的选择包括通用变频器的型式选择和容量选择两个方面，选择应遵循：第一，其主要性能可以确保有效的满足工艺的需要，第二，性价比应该比较理想。在进行选择通用变频器类型的时候应该从负载特性着手。在风机以及泵类等平衡转矩，在速度较低的时候具有较小的负载转矩，一般应选用普通或者专用功能型的通用变频器。而恒转矩类负载或者静态转速精度要求过高的机械在选择上应该具有转矩控制性能的高功能型的通用变频器，此通用变频器转矩速度较低、较硬的静态机械特性，负载冲击不会为其带来影响，有挖土机的性能。为能够进行调速比较大下进行恒转矩调速，一般要将通用变频器体积予以加大。而较高的精度要求、较好的动态性能、较快的速度响应的生产机械，比如注塑机、造纸机械或者轧钢机等，要选择直接进行转矩控制或者矢量控制型的通用变频器。

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SQUARE D KHB-36225 USPP KHB36225

Square D 8040 PCM-110 One Year Warranty !

SQUARE D 8538-SBA66-V02CFP51P52X22Y76 NSFP 8538SBA66V02CFP5

SQUARE D MAL-367001021 NSFP MAL367001021

SQUARE D 8502-SGO2S2-V06-X01 USPP 8502SGO2S2V06X01

SQUARE D SY/MAX 8030-ROM121 OUTPUT MODULE *NEW IN BOX*

SQUARE D FIL36025 NSFP FIL36025

SQUARE D MH368006468 USPP MH368006468

SQUARE D MHL368003901 USPP MHL368003901

SQUARE D S8600B0C0E6E0A0A USPP S8600B0C0E6E0A0A

SQUARE D ATV-58HU72-N4Z NSPP ATV58HU72N4Z

SQUARE D NFHS36225 NSFP NFHS36225

SQUARE D 3050-EGW-1 NSFP 3050EGW1

SQUARE D 10S1FIS NSFP 10S1FIS

NIB Square D Powerlink AS Control Module AS42C

SQUARE D ME36250LI USPP ME36250LI

SQUARE D 0W6129A NSFP 0W6129A

Square D KCP34150MT Circuit Breaker

SQUARE D 8536-SFG1-V08A USPP 8536SFG1V08A

SQUARE D S163A USPP S163A

SQUARE D 8804-1ACG4H USPP 88041ACG4H

SQUARE D 8536-SFG1-V06 USPP 8536SFG1V06

SQUARE D RC12V120 USPP RC12V120

Square D 1.5S1F NSFP **GENUINE**  1.5S1F

Square D 8030 CRM-260 Lifetime Warranty !!!

SQUARE D HC2683WP NSFP HC2683WP

Square D LAF3640032MV1027 Cicuit Breaker 400a Molded Case 600v NEW

Square D PBTB502 NSFP **GENUINE** Schneider Telemecanique

SQUARE D S164N NSPP S164N

SQUARE D LI36400 USPP LI36400

SQUARE D NF2000G3 USPP NF2000G3

SQUARE D AS-42CT USPP AS42CT

Square D 8020 SCP-423 Lifetime Warranty !!!

Square D GFM250  NSFP **GENUINE** GFM 250

SQUARE D 32456 NSFP 32456

SQUARE D 82344-RB NSPP 82344RB

SQUARE D FCP34020TF CIRCUIT BREAKER 20A *NEW NO BOX*

Square D 8010 SPR-300 One Year Warranty !

SQUARE D FLEX-58KD12-N4 NSPP FLEX58KD12N4

SQUARE D HU364DS USPP HU364DS

SQUARE D 8538SBG33V81CFF4P51P52TX11 NSFP 8538SBG33V81CFF1

SQUARE D HJL36125 USPP HJL36125

SQUARE D 3020-CM-150X1 USPP 3020CM150X1

SQUARE D 8810-SEO4-V02S USPP 8810SEO4V02S

SQUARE D MXL36600 USPP MXL36600

SQUARE D 8538SBA438V02S8V02S USPP 8538SBA438V02S8V

SQUARE D MAL360001287 USPP MAL360001287

SQUARE D MHL36800-36DC-1680 USPP MHL3680036DC1680

SQUARE D LCL36500 NSFP LCL36500

SQUARE D 3020-CM-100X1 NSPP 3020CM100X1

SQUARE D NR12 NSFP NR12

SQUARE D MAL-36800-36M USPP MAL3680036M

KI36150 SQUARE D ILINE PLUGIN BREAKER 120WR0003186

Square D 3020CM2250 NSFP **GENUINE** 3020 CM2250 Schneider Telemecanique

SQUARE D 3020-CM2250 USPP 3020CM2250

Square D PowerLogic Circuit Monitor CM4250 240/300V 96mA w/ CVM42 

Square D 12-790951-20 Solid State Control Electrical Operator

New Surplus Square D 8010 SWF-374 SY/Mate Series Revision

Square D KAL361251021 Thermal Magnetic Circuit Breaker 125a KAL-361251021 Shunt

SQUARE D POWER LOGIC CIRCUIT MONITOR 3020-CM2350 *NEW*

SQUARE D 8810-SDO18-V02SYS4 USPP 8810SDO18V02SYS4

SQUARE D MA-36600 NSFP MA36600

Square D LC36400 400 AMP 3 Pole Thermal Magnetic Circuit  Breaker  New Surplus

SQUARE D SYMAX 300 PROCESSOR CLASS 8030 DOM 221 DIM 101

SQUARE D H323DS USPP H323DS

SQUARE D MJF36400 NSFP MJF36400

SQUARE D MHP36600 NSFP MHP36600

SQUARE D MHF360006M NSFP MHF360006M

 SQUARE D 8884-SPR-25 ,SY/MAX20 CRT PROGRAMMER  ,EC

NEW SQUARE D 480VAC 7.5 HP VFD DRIVE VSD57CU90N46 3 PH (TELEMECANIQUE) VSD57, GI

SQUARE D NQOD430M-SPL NSPP NQOD430MSPL

SQUARE D 8539SCW24V81C6FF4P1TX20 USPP 8539SCW24V81C6FF

SQUARE D TVS-2EBA16A NSFP TVS2EBA16A

SQUARE D MHL36400V8002 USPP MHL36400V8002

SQUARE D 8538SBG13V81CFF4H20P1TX11  AC MOTOR STARTER *NEW IN BOX*

SQUARE D 1ACA4K OMEGAPAK ADJUSTABLE FREQUENCY CONTROLLER WITH POWER KNOB **

SQUARE D HLL36150LV USPP HLL36150LV

SQUARE D 8536-SFO1-V02-H655S USPP 8536SFO1V02H655S

SQUARE D 3050PIF3 USPP 3050PIF3

SQUARE D PJL36000S10 NSFP PJL36000S10

SQUARE D 8903-SVO11-V02 USPP 8903SVO11V02

SQUARE D HU662AWK-EI NSFP HU662AWKEI

SQUARE D MHF3640026DC2146 USPP MHF3640026DC2146

SQUARE D SSP02BIA16-PBQ1 NSFP SSP02BIA16PBQ1

SQUARE D HU662RWK USPP HU662RWK

SQUARE D LCL36400 NSFP LCL36400

Square D DTU463 NSFP **GENUINE** Schneider Telemecanique

SQUARE D 1ACA4K OMEGAPAK ADJUSTABLE FREQUENCY CONTROLLER **

SQUARE D IK36250 USPP IK36250

SQUARE D 52011-038-54 USPP 5201103854

SQUARE D 8536-SF01 USPP 8536SF01

Square D  ATV58HD23M2XZU  ALTIVAR 58 TRX  TELEMECANIQUE

SQUARE D KH36110 CIRCUIT BREAKER 110A *NEW IN BOX*

Square D Powerlink NEHB242ASP Power Interface Module

Square D P00VO4J OmegaPak AC Drive 460V, 3 Phase, 15HP

SQUARE D 8810-SDO2-V02S USPP 8810SDO2V02S

SQUARE D MH36800 USPP MH36800

SQUARE D MHL3645025DC-3903 USPP MHL3645025DC3903

SQUARE D MHL3645025DC1679 USPP MHL3645025DC1679

SQUARE D MHL3630025DC3903 USPP MHL3630025DC3903

SQUARE D LXL36600 USPP LXL36600

SQUARE D S33594 NSFP S33594

SQUARE D HLL36125LV USPP HLL36125LV

SQUARE D ME36600LI USPP ME36600LI

SQUARE D H364DS *FACTORY SEALED*

Square D 8536SFO1V02S NSFP **GENUINE** 8536 SFO1 V02S

Square D 8536SF01SV02S NSNP **GENUINE** Schneider Telemecanique

Square D 8536SFO1V02S NSNP **GENUINE** 8536 SFO1 V02S Schneider Telemecanique

SQUARE D JLL36175LV USPP JLL36175LV

SQUARE D NQOD242ASP-N NSFP NQOD242ASPN

SQUARE D PFCD4060F NSPP PFCD4060F

SQUARE D XR-IA-DI NSPP XRIADI

SQUARE D 30528-001-57 NSPP 3052800157

SQUARE D 8502-SGO2-V06S USPP 8502SGO2V06S

SQUARE D 9070-K3000-D3 NSFP 9070K3000D3

NEW SQUARE D 8030 CRM-510 INTERFACE

SQUARE D CM-3350 USPP CM3350

SQUARE D MXF36250 USPP MXF36250

SQUARE D 3020-CM200X1 USPP 3020CM200X1

SQUARE D 8536-SGO1-V03 USPP 8536SGO1V03

SQUARE D LCL36600 NSFP LCL36600

SQUARE D MHL36225 USPP MHL36225

SQUARE D 8539SBA74V80B1FF4TX11 NSFP 8539SBA74V80B1FF

SQUARE D FLEX-58KU41-N4 USPP FLEX58KU41N4

Square D 8839EFDGG2VYA07A08L09 E-Flex Adjustable Speed Drive Controller - NEW

SQUARE D 9070-SK1500G2D4 USPP 9070SK1500G2D4

Square D / Telemecanique Altivar 66 ATV66D12N4 V. 3.3_VW3A66206_VX4A661

SQUARE D MEL236LSIG1257 225A CIRCUIT BREAKER w/ MICROLOGIC TRIP *NEW IN BOX*

SQUARE D MEL236LSIG2245 CIRCUIT BREAKER w/ MICROLOGIC TRIP UNIT *NEW IN BOX*

SQUARE D MAIN CONTROL CIRCUIT BAORD 52011-038-51

SQUARE D JLL36250 NSFP JLL36250

SQUARE D 756FIS TRANSFORMER **

Square D #4 Reversing Contactor Class 8810 , (B1R)

Square D 9007-C64BW Limit Switch 9007C64BW Series A (Pack of 24)

SQUARE D 8538SBA22V84CF4P1T USPP 8538SBA22V84CF4P

SQUARE D MXL368001021 USPP MXL368001021

NEW SQUARE D 52011-038-51 PCB CIRCUIT BOARD D465648

Square D H362AWC Safety Switch

SQUARE D 52011-038-51 USPP 5201103851

SQUARE D MHP36800MT USPP MHP36800MT

SQUARE D 8538SBG11V84CFF4P1TX10 NSFP 8538SBG11V84CFF1