选用变频器的类型，按照生产机械的类型、调速范围、静态速度精度、起动转矩的要求，决定选用那种控制方式的变频器合适。所谓合适是既要好用，又要经济，以满足工艺和生产的基本条件和要求
需要控制的电机及变频器自身
1）电机的数。一般电机数以不多于(为宜，否则变频器容量就要适当加大。
2）转矩特性、临界转矩、加速转矩。在同等电机功率情况下，相对于高过载转矩模式，变频器规格可以降额选取。3）电磁兼容性。为减少主电源干扰，使用时可在中间电路或变频器输入电路中增加电抗器，或安装前置隔离变压器。一般当电机与变频器距离超过50m时，应在它们中间串入电抗器、滤波器或采用屏蔽防护电缆
变频器功率的选用
系统效率等于变频器效率与电动机效率的乘积，只有两者都处在较高的效率下工作时，则系统效率才较高。从效率角度出发，在选用变频器功率时，要注意以下几点：
1）变频器功率值与电动机功率值相当时合适，以利变频器在高的效率值下运转。
2）在变频器的功率分级与电动机功率分级不相同时，则变频器的功率要尽可能接近电动机的功率，但应略大于电动机的功率。
3）当电动机属频繁起动、制动工作或处于重载起动且较频繁工作时，可选取大一级的变频器，以利用变频器长期、地运行。
4）经测试，电动机实际功率确实有富余，可以考虑选用功率小于电动机功率的变频器，但要注意瞬时峰值电流是否会造成过电流保护动作。
5）当变频器与电动机功率不相同时，则相应调整节能程序的设置，以利达到较高的节能效果
Pipe Bender & Guide Heavy Duty (MS124)
PIPE BENDER
pipe bender
Pines Tube Bender Dial-A-Bend Control Parts
Pines Tube Bender Dial-A-Bend Control Parts
Pines Tube Bender Dial-A-Bend Control Parts
Pines M34561 Vertical Bender w/Remote Pedestal Control 20HP Wired 460V
Pines Hydraulic Tube Bender Control Parts Dial-A-Bend, Leonard, PHI,
Pines Bender, Technology Hydraulic Rotary Machine, Owners Operations Manual 1996
Pines Bender, Hydraulic Rotary Owner Operation Schematics Parts & Tooling Manual
PINES BENDER SAFETY CIRCUIT BOARD 177-93-995-08
Pines Bender Control Screen Tube (PHI, Conrac, Leonard)
Pines Bender Control Face Plate (PHI, Conrac, Leonard)d
PINES BENDER CIRCUIT BOARD LOT
PINES BENDER CIRCUIT BOARD 177-93-995-04 Rev. 0
PINES BENDER CIRCUIT BOARD 177-93-995-01
PINES BENDER CIRCUIT BOARD 177-93-995-01 Rev. D
PINES BENDER CIRCUIT BOARD 160-93-995-09
Pines 3T Vertical Bender
Pines 3T Tube Bender
Pines #4 w/ #3 Cylinder Tube Bender Operator Manual
Pines #3 Tube Bender, Operators owner Manual 1948
PINES #2 hydraulic Tube Bender mandrel extractor eaton leonard crippa addison
PINES #2 High Speed Tube Bender w mandrel extractor, 1979 w updated controls
Pines #2 Bender Safety Guard NOS (PHI, Conrac, Leonard)
Pines #1 LH Bender Safety Guard NOS (PHI, Conrac, Leonard)
Pines #1 Bender Safety Guard (PHI, Conrac, Leonard) a
PINES # 1 (PR Machinery) Hydraulic Tube Pipe Bender with Leonard side winder
PIN WELDER / BENDER AUTOMATED MODEL 1BV w/ UNITEK SERIES 180 THIN LINE WELDER
PHI Bender Control (Pines, Conrac, Leonard)
PHI 210 RH HYDRAULIC TUBE BENDER 1 1/2" 120" MAX TUB LENGTH, 8" MAX RADIUS 5 Hp
Pexto slip roller rolls roll former tube ring cone bender 381d
Pexto 36" Bar Folder w/Cheek Bender Attachment peck stow and Wilcox
PEXTO - ROPER WHITNEY HAND SEAMER SHEET metaL BENDER TOOL HVAC FABRICATION
PEDRICK PIPE AND TUBE BENDER MODEL A-3 / REBUILT (OC677)
Pedrick B 10 Tube Pipe Flats Bender Rotary Compression CNC Dies Price Lowered
PEDRAZZOLI TUBE PIPE TWIN HEAD BENDING MACHINE BEND MASTER 38 2T MRVIMS BENDER
Pedrazzoli CNC Tube Bender - Universal Brown 60
PECO 3/4" E.M.T. Conduit Bender Electrical Contractor ~ Electricians Tool #639
PBB04 SEALEY metaL BENDER BENCH MOUNTING [Benders, metal metal Benders] !
Parker/Lakeland 632 Hydraulic Bender Vise Faces
PARKER Tubibg/Conduit Bender No. 10-2829 5/8" O.D.
Parker Tube Pipe bender 3/8" dia 15/16" Radius Good Condition
Parker Tube Pipe bender 102R 65115 Good Condition
Parker Tube Bender Model 412 Including 5 Radius Blocks
Parker Tube Bender Model 412 Including 4 Radius Blocks & Bench Mounting Adapter
PARKER TUBE BENDER MODEL 412
PARKER TUBE BENDER # 624 ?TUBING BENDER DIES PARKER PIPE BENDER
Parker Model 848 Tube Bender Instruction & Parts Manual
PARKER HANNIFIN TUBE BENDER NO. 6-2829R 3/8
Parker Hannifin No. 6 6-2829R 3/8" Tubing Bender
PARKER HANNIFIN 3/4" O.D 3 3/4" RADIUS HAND TUBE BENDER
PARKER HANNIFIN 3/4 OD 3-3/4 RADIUS PIPE BENDER NO. 12-2829R
PARKER HANNIFIN 1/2" TUBING BENDER
Parker Bender Lakeland bender 1-3/4 X 7 Bending shoe and Follow bar
Parker and Other 632 Hydraulic Bender Parts
PARKER 412 Tube Bender/Shoes & Blocks / Ridgid Tubing Cutter & Ridgid Flare Tool
Parker / Lakeland #6 3/8" OD Tube Bender Slide Block 5" Long
Parker / Lakeland #6 3/8" OD Tube Bender Clamp Block
PARKER & IMPERIAL HANDTUBE BENDERS
Pair of KBS Rollobend Long Radius Tube Benders #8100 1/2" - 5" R & # 4100 1/4"
PAIR OF Current Tools 670 Screw Type Reel Jack Stands FREE SHIPPING
Pack of 5 Different Colored Electrical Tape by GB Gardener Bender GTPC-550
OX-400N Gb-Gardner Bender 4Oz Anti-Oxidant Compound OX-400N fresh LOT OF (2)
OX-400N Gb-Gardner Bender 4Oz Anti-Oxidant Compound OX-400N fresh
OUTER PIPE SPRING BENDER 16MM,20MM TOOLS PIPEWORK
Orthopedic Small Bone Plate Benders for Plates up to 2.7mm-Keebomed
Orthopedic Plate Bender Small Plate bending I