2711P-T7C4D6

2711P-T7C4D6

2711P-T7C4D6

2. 控制技术基本思想

我国交流电的频率是50Hz，因此，交流电的波形是正弦波。那么，PWM控制技术的目标就是用什么样的信号或波形来代替这个正弦波交流电。这个信号可以是形状不同的各种窄脉冲，如方波、三角波等。而在我们今天要讲的电动汽车中采用的是等幅但不等宽的脉冲来代替这个正弦波。

2711P-T7C4D6

ALLEN BRADLEY 1746-IV16 Ser C 1746-1V16

Allen Bradley 1747-L552 /C 1747L552 SLC 5/05 Controller

Allen Bradley 1747-L552 /C 1747L552 SLC 5/05 Controller

 In Box ALLEN BRADLEY 1746-IV32 Ser D 1746-1V32

A B Allen Bradley Motor starter 509-BOD NEMA 1, 10 HP

 In Box ALLEN BRADLEY 1746-IA8 Ser A 1746-1A8

Allen Bradley 1747-L542 /C 1747L542 SLC 5/04 Controller

Allen Bradley 500F-DOD930 Contactor  Overstock Item

SIZE 3 3P 3PH 120V Open MAG Contactor PRICED TO SELL

 ALLEN BRADLEY CONTACTOR 24VDC CAT # 100-C16DJ01 32A

ALLEN-BRADLEY 193-EB1FB OVERLOAD RELAY  IN BOX

 Allen Bradley 1747-L551 /C 1747L551 SLC 5/05

 Allen Bradley 1747-L551 /C 1747L551 SLC 5/05

 Allen Bradley 1747-L553 /C 1747L553 SLC 5/05

** Allen Bradley 1747-L551 /C 1747L551 SLC 5/05

Allen Bradley 1305 KBA06 dynamic brake 3hp drive NIB *

ALLEN BRADLEY 140-A20 Aux 2NO  NO PACKAGE SER.C

700-F400A1 Allen-Bradley Contactor w/ Aux. Contact!

In Great Shape! Super Clean & Tested!

Allen-Bradley 1336 Plus II 25 HP AC Drive 1336F-B020VAF

Allen-Bradley 1336 Plus II 30 HP AC Drive 1336F-B030VAF

Allen Bradley 2711-T9C1 Panelview 900 S:C R:E F:3.15

ALLEN BRADLEY 700-HC54Z24-1-4 SER.C 

700-F400A1 Allen-Bradley 110/120V Control Relay!

In Great Shape! Super Clean & Tested!

ALLEN BRADLEY POWERFLEX 40 AC DRIVE 22BD1P4N104 0.5 HP

AB Allen Bradley 2755 HFP D1 scanner power supply 

FACTORY SEALED Allen Bradley 1785-L80B/E NIB 1785L80B

Allen Bradley Size Sz 1 15 A Amp 6in Breaker MCC Bucket

Allen Bradley Size 1 30 Amp HFD 6in Breaker MCC Bucket

Allen Bradley Size Sz 1 30 A Amp 6in Breaker MCC Bucket

Allen Bradley Size Sz 1 30 A Amp 6in Breaker MCC Bucket

Allen Bradley Size 1 15 A Amp 6in Breaker MCC Bucket

Allen Bradley Size Sz 1 15 A Amp MCP Breaker MCC Bucket

Allen Bradley Size Sz 1 50 A Amp MCP Breaker MCC Bucket

Allen Bradley Size Sz 1 30 A Amp MCP Breaker MCC Bucket

Allen Bradley Size Sz 1 15 Amp HMCP Breaker MCC Bucket

** Allen Bradley AB 1746-HSTP1 /E 1746-HSTP1 SLC

60 DAYS WARRANTY! / SLC Stepper Controller Module

AC CONTROL RELAY  ALLEN BRADLEY TYPE XO20V02

ALLEN BRADLEY PANELVIEW 600 CAT. 2711-B6C8X SER. B

FACTORY SEALED Allen Bradley 1785-L40B/E NIB 1785L40B

FACTORY SEALED Allen Bradley 1785-L40B/E NIB 1785L40B

1 NIB ALLEN BRADLEY 1791-16A0 I/O BLOCK 16 POINT MODULE

ALLEN BRADLEY PANELVIEW 2711-T6C20L1 SER. B REFURBISHED

FS NIB ALLEN BRADLEY 1756-OB16E DC OUTPUT MODULE

FACTORY SEALED -  - FREE SHIPPING

Allen Bradley AC Relay Cat# 700-N800A1 Ser. C Type N

! A-B ALLEN BRADLEY SLC 500 1761-NET-ENI Ser B

NIB Allen Bradley 10 amp 2 pole breaker 1492-CB2G100

4 Lot Allen Bradley AB Solid State Relay 700-SH 10GZ25

ALLEN BRADLEY 1333-ZAA Adj Frequency AC Drive 

Allen Bradley SLC 5/04 1747-L542 Ser B 30Day Money Back

Allen Bradley SLC 5/04 1747-L542 Ser B 30Day Money Back

Allen Bradley AB 1336S-BRF20-AN-EN- Ser D 2 HP FRN 3.04

Allen-Bradley size 1 520E-BOD 2-Speed Starter AB 27A

Allen Bradley 1746 A4, 1746 P2 1746 L532 + 3 I/O module

2W 330 ohm 5% Carbon Comp Resistors Allen Bradley MIL 4

2W 330 ohm Carbon Comp Resistors Allen Bradley MIL (4)

2W 33K ohm 5% Carbon Comp Resistors Allen Bradley (5)

2W 39 ohm 5% Carbon Comp Resistors Allen Bradley (5)

** Allen Bradley 1793-IE4 /A 1793IE4 Analog Input

60 DAYS WARRANTY! Analog Input Modules, 4 Single-Ended

Allen-Bradley Camera Switch Modules-2 and Accessories!

2W 68 ohm Carbon Comp Resistors MIL Allen Bradley (4)

2W 430 ohm Carbon Comp Resistors Allen Bradley MIL (4)

ALLEN BRADLEY 1746-OW16/C MODULE

ALLEN BRADLEY ADJUSTABLE FREQUENCY AC DRIVE C#1332-YAA!

Allen Bradley Output Module 1746-OA16 Ser. A

Allen Bradley 1746-HSRV **FACTORY SEALED ++++WARRANTY

ALLEN BRADLEY 1746-NI8/A MODULE

Allen Bradley 1746-HSCE SerA High Speed Counter Encoder

Allen Bradley SLC DH+ 5/04 Terminal Connector

Allen Bradley SLC SCANport 1203-SM1 SerA

Allen Bradley 160-BA02NSF1 0.75HP AC Drive 0.75 HP