140XBP00400 机器视觉
变频调速器
频率下降时电压V也成比例下降，这个问题已在回答4说明。V与f的比例关系是考虑了电机特性而预先决定的，通常在控制器的存储装置（ROM）中存有几种特性，可以用开关或标度盘进行选择
8、按比例地改V和f时，电机的转矩如何变化？
频率下降时成比例地降低电压，那么由于交流阻抗变小而直流电阻不变，将造成在低速下产生地转矩有减小的倾向。因此，在低频时给定V/f,要使输出电压一些,以便获得地起动转矩,这种补偿称增强起动。可以采用方法实现,有自动进行的方法、选择V/f模式或调整电位器等方法
9、在说明书上写着变速范围60~6Hz，即10：1，那么在6Hz以下就没有输出功率吗？
在6Hz以下仍可输出功率，但根据电机温升和起动转矩的大小等条件，低使用频率取6Hz左右，此时电动机可输出额定转矩而不会引起严重的发热问题。变频器实际输出频率（起动频率）根据机种为0.5~3Hz.
10、对于一般电机的组合是在60Hz以上也要求转矩，是否可以？
通常情况下时不可以的。在60Hz以上（也有50Hz以上的模式）电压不变，大体为恒功率特性，在 高速下要求相同转矩时，注意电机与变频器容量的选择。
11、所谓开环是什么意思？
给所使用的电机装置设速度检出器（PG），将实际转速反馈给控制装置进行控制的，称为“闭环 ”，不用PG运转的就叫作“开环”。通用变频器多为开环方式，也有的机种利用选件可进行PG反馈.
12、实际转速对于给定速度有偏差时如何办？
开环时，变频器即使输出给定频率，电机在带负载运行时，电机的转速在额定转差率的范围内（1%~5%）变动。对于要求调速精度比较高，即使负载变动也要求在近于给定速度下运转的场合，可采用具有PG反馈功能的变频器（选用件）。
13、如果用带有PG的电机，进行反馈后速度精度能吗？
具有PG反馈功能的变频器，精度有。但速度精度的植取决于PG本身的精度和变频器输出频率的分辨率。
VEXTA 5GU120KA 5GU120KA
VEXTA 5GU12.5KB 5GU125KB
VEXTA 5GN9KA 5GN9KA
VEXTA 5GN9K 5GN9K
VEXTA 5GN9K 5GN9K
VEXTA 5GN3KA 5GN3KA
VEXTA 5GN36KA 5GN36KA
VEXTA 5GN36KA 5GN36KA
VEXTA 5GN25KA 5GN25KA
VEXTA 5GN25KA 5GN25KA
VEXTA 5GN18RH 5GN18RH
VEXTA 5GN18KA 5GN18KA
VEXTA 5GN180KA 5GN180KA
VEXTA 5GN180KA 5GN180KA
VEXTA 5GN120KA 5GN120KA
VEXTA 5GN120KA 5GN120KA
VEXTA 5GN100KA 5GN100KA
VEXTA 5GK75KA 5GK75KA
VEXTA 5GK60KA 5GK60KA
VEXTA 5GK50KA 5GK50KA
VEXTA 5GK50KA 5GK50KA
VEXTA 5GK50KA 5GK50KA
VEXTA 5GK30K 5GK30K
VEXTA 5GK25KA 5GK25KA
VEXTA 5 Phasen Driver UDK5107NW2
Vexta 5 Phase, 0.72deg, 1.4A stepper Motor #PK566Y1
VEXTA 5 PHASE WTREPPINGMOTOR MOTOR PK564BW
VEXTA 5 PHASE STEPPING MOTOR PK566AW-P10 DC 1.43V 1.4A (B09)
Vexta 5 Phase Stepper Motor PK564BUA
Vexta 5 Phase Stepper Motor PK564AUA
VEXTA 5 Phase Stepper Driver RKD514L-A
Vexta 5 Phase Motor Driver EIC4011
Vexta 5 phase Motor Drive EIC4011
VEXTA 4RK25RA-A 4RK25RAA
VEXTA 4RK25GN-C 4RK25GNC
VEXTA 4RK25GN-AUL 4RK25GNAUL
VEXTA 4RK25GN-AMUL 4RK25GNAMUL
VEXTA 4RK25GN-AMUL 4RK25GNAMUL
VEXTA 4RK25GN-AM-115 4RK25GNAM115
VEXTA 4RK25GK-AA 4RK25GKAA
VEXTA 4LB20N-1 4LB20N1
VEXTA 4LB20-3 4LB203
VEXTA 4IK40A-BA 4IK40ABA
VEXTA 4IK25GN-S 4IK25GNS
VEXTA 4IK25GN-CW 4IK25GNCW
VEXTA 4IK25GN-AT 4IK25GNAT
VEXTA 4IK25GK-A2 4IK25GKA2
VEXTA 4IK22RGK-AA 4IK22RGKAA
VEXTA 4GN9L 4GN9L
VEXTA 4GN90KA 4GN90KA
VEXTA 4GN75RH 4GN75RH
VEXTA 4GN7.5KA 4GN75KA
VEXTA 4GN7.5KA 4GN75KA
VEXTA 4GN5K 4GN5K
VEXTA 4GN50KA 4GN50KA
VEXTA 4GN3KA 4GN3KA
VEXTA 4GN36K 4GN36K
VEXTA 4GN25KA 4GN25KA
VEXTA 4GN120KA 4GN120KA
VEXTA 4GN12.5KA 4GN125KA
VEXTA 4GK75KA 4GK75KA
VEXTA 4GK75KA 4GK75KA
VEXTA 4GK6KA 4GK6KA
VEXTA 4GK60KD 4GK60KD
VEXTA 4GK60K 4GK60K
VEXTA 4GK60K 4GK60K
VEXTA 4GK5KA 4GK5KA
VEXTA 4GK3KA 4GK3KA
VEXTA 4GK36KA 4GK36KA
VEXTA 4GK30KD 4GK30KD
VEXTA 4GK30KA 4GK30KA
VEXTA 4GK30KA 4GK30KA
VEXTA 4GK18KA 4GK18KA
VEXTA 4GK10X 4GK10X
VEXTA 4GK10X 4GK10X
VEXTA 3RK15GN-AUL 3RK15GNAUL
VEXTA 3RK15GN-AUL 3RK15GNAUL
VEXTA 3RK15GN-AUL 3RK15GNAUL
VEXTA 3RK15GK-A2 3RK15GKA2
VEXTA 3RK15GK-A2 3RK15GKA2
VEXTA 3RK15A-AULA 3RK15AAULA
VEXTA 3IK15RGN-AUL 3IK15RGNAUL
VEXTA 3IK15GK-AA 3IK15GKAA
VEXTA 3GN12.5KA 3GN125KA
VEXTA 3GN12.5K 3GN125K
VEXTA 3GN12.5K 3GN125K
VEXTA 3GK75KA 3GK75KA
VEXTA 3GK6KA 3GK6KA
VEXTA 3GK6KA 3GK6KA
VEXTA 3GK6KA 3GK6KA
VEXTA 3GK50KA 3GK50KA
VEXTA 3GK3KA 3GK3KA
VEXTA 3GK30K 3GK30K
VEXTA 3GK180KA 3GK180KA
VEXTA 3GK15KA 3GK15KA
VEXTA 3GA3K 3GA3K
VEXTA 2RK6GN-AW2 2RK6GNAW2
VEXTA 2RK6GN-AUL 2RK6GNAUL
VEXTA 2RK6GK-AA 2RK6GKAA
VEXTA 2RJ4GA-AUL 2RJ4GAAUL
Vexta 2-Phasen Schrittmotor, PK243B1A-SG10, DC 0.95A 4.2 Ohm
Vexta 2-Phase Stepping Motor PXC43-03A-C21
Vexta 2-Phase Stepping Motor PX243M-03A -0.9 Deg/Step 12VDC -Oriental Motor (H5)
Vexta 2-Phase Stepping Motor PX243M-01BA
VEXTA 2-PHASE STEPPING MOTOR PK296-02A
Vexta 2-phase Stepping Motor PH299-03 1.8°/step 12V 1A
Vexta 2-Phase Stepping Motor PH268-21M2
Vexta 2-Phase Stepping Motor PH266-E1.2-C19 6VDC 1.2A 1.8 Degree Step
Vexta 2-Phase Stepping Motor PH264-01-C41 4V, 1.1A, 1.8 Degree
Vexta 2-Phase Stepping Motor PH264-01
VEXTA 2-PHASE STEPPING MOTOR CC2
VEXTA 2-PHASE STEPPING MOTOR 0.9 DEGREE DC 6V 0.6A MODEL PX243M-02AA-C3, GUC
VEXTA 2-PHASE STEPPING MOTOR 0.9 DEGREE DC 6V 0.6A MODEL PX243M-02AA-C3, #2 GUC
VEXTA 2-phase driver UD2115B
Vexta 2-Phase 0.9°/STEP PX243M-03A
VEXTA 2IK6RGN-AW 2IK6RGNAW
VEXTA 2IK6RGN-AUL 2IK6RGNAUL
VEXTA 2IK6RGN-AUL 2IK6RGNAUL
VEXTA 2IK6RGN-AUL 2IK6RGNAUL
VEXTA 2IK6RGN-A 2IK6RGNA
VEXTA 2IK6RGN-A 2IK6RGNA
VEXTA 2IK6RGK-AA 2IK6RGKAA