Description
hardware flow control. It is an ideal choice in the field of industrial automation.
[Introduction] PLC and frequency converter are two important electrical equipment in the field of industrial automation control. This book
combines the introductory knowledge of PLC and frequency converter. The main contents include introduction to PLC, PLC composition and
principle, and the use and application of PLC programming software. System development, basic instructions and applications, step instructions
and applications, functional instructions and use, the structure and principle of the frequency converter, the use of the frequency converter, as well as
the selection, installation and maintenance of the frequency converter.
What is a frequency converter ? Generally speaking, it is: AC – DC – AC (it can also be said to be rectifier first – then inverter). The frequency converter
that undergoes this process is also called AC-DC-AC frequency conversion. Currently, it is also used in various industries. One of the more commonly
used ones. In addition, there is also an AC-AC conversion, which is also called an AC converter.
1. What is a frequency converter?
Frequency converter is a power control device that uses the on-off function of power semiconductor devices to convert industrial frequency power into
another frequency. The frequency converter is mainly composed of rectifier (AC to DC), filtering, inverter (DC to AC), braking unit, drive unit, detection unit, microprocessing unit, etc.
The frequency converter is a device that converts industrial frequency power supply (50Hz or 60Hz) into AC power supply of various frequencies to
realize variable speed operation of the motor. The control circuit completes the control of the main circuit, and the rectifier circuit converts the AC
power into DC power. The DC intermediate The circuit smoothes and filters the output of the rectifier circuit, and the inverter circuit reverses the DC
power into AC power. For inverters that require a lot of calculations, such as vector control inverters, sometimes a CPU for torque calculation and some
corresponding circuits are needed. Variable frequency speed regulation achieves the purpose of speed regulation by changing the frequency of power supply to the motor stator winding.
Excitation system ABB module RLM01
Excitation system ABB module RINT-5521C
Excitation system ABB module RINT-5521C
Excitation system ABB module RID-04 3HNA020882-001
Excitation system ABB module RFO810
Excitation system ABB module RF620
Excitation system ABB module RF615
Excitation system ABB module RF615
Excitation system ABB module RF533 3BSE014227R1
Excitation system ABB module RF522 3BSE000743R1
Excitation system ABB module REX521GHHGSH51G
Excitation system ABB module REX521GBHPLB01G
Excitation system ABB module REX010
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Excitation system ABB module REU610CVVHCNR
Excitation system ABB module RET670
Excitation system ABB module RET670
Excitation system ABB module RET670
Excitation system ABB module RET650
Excitation system ABB module RET650
Excitation system ABB module RET630
Excitation system ABB module RER133
Excitation system ABB module REM615
Excitation system ABB module REM545BM223AAAA
Excitation system ABB module REM545BM222BAAA
Excitation system ABB module REM543CM216AAAA
Excitation system ABB module REM543CM214AAAB
Excitation system ABB module REG670
Excitation system ABB module REG216
Excitation system ABB module REF620C
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Excitation system ABB module REF615A_E HAFAABAAABE1BCA1XE
Excitation system ABB module REF615
Excitation system ABB module REF611C-E
Excitation system ABB module REF610C11LCLR
Excitation system ABB module REF610
Excitation system ABB module REF610
Excitation system ABB module REF601 CE446BB1NH
Excitation system ABB module REF601
Excitation system ABB module REF543KM129AAAB
Excitation system ABB module REF543KM127AAAA
Excitation system ABB module REF543KB127AAAA
Excitation system ABB module REF542PLUS 1VCR007346
Excitation system ABB module REF542PLUS 1VCF752000
Excitation system ABB module REF542plus
Excitation system ABB module REF542PLUS
Excitation system ABB module REF542PLUS
Excitation system ABB module REF541KM118AAAA
Excitation system ABB module REF541
Excitation system ABB module RED615
Excitation system ABB module REC670
Excitation system ABB module REC650
Excitation system ABB module RDCU-12C 3AUA0000036521
Excitation system ABB module RDCU-02C
Excitation system ABB module RDCU-02C
Excitation system ABB module RDCU-02C
Excitation system ABB module RDCO-03C
Excitation system ABB module RDCO-01
Excitation system ABB module RB520 3BSE003528R1
Excitation system ABB module RB520
Excitation system ABB module RB520
Excitation system ABB module RAPI-01C 3AUA0000036340
Excitation system ABB module RAPI-01C 3AUA0000036340
Excitation system ABB module RAIO-01
Excitation system ABB module R1.SW2/3
Excitation system ABB module R1.SW2/3
Excitation system ABB module R1.CAIR
Excitation system ABB module R1.CAIR
Excitation system ABB module QHMX325
Excitation system ABB module QHMV306
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Excitation system ABB module QHFT201
Excitation system ABB module QHFT200F
Excitation system ABB module QHFG207
Excitation system ABB module QHFG205
Excitation system ABB module QHFG-203
Excitation system ABB module QHFC210
Excitation system ABB module QHFB-210
Excitation system ABB module QHFA-301
Excitation system ABB module PXAH401
Excitation system ABB module PXAH401
Excitation system ABB module PU519 3BSE018681R1
Excitation system ABB module PU519
Excitation system ABB module PU518
Excitation system ABB module PU517 3BSC980050R46
Excitation system ABB module PU517
Excitation system ABB module PU517
Excitation system ABB module PU517
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