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.
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1769-L32E Allen-Bradley Programmable automation controller
1769-L30ERMS Allen-Bradley CompactGuardLogix controller
1769-L24ER-QBFC1B CompactLogix 5370 L2 controller
1769-IT6 Thermocouple / milivolt Input Module
1769-IF8 Compact I/O analog input module
1769-IA16 Allen-Bradley 16 Channel Input Module
1769-ADN DeviceNet communication module
1762-L40BWAR Programmable Logic Controller (PLC)
1762-IF4 Differential channels analog input module
1757-SRM ControlLogix System Redundancy Module
1756-TBNH removable terminal block or RTB module
1756-RMB ControlLogix Redundancy module
1756-RM redundant module
1756-OF8 analog output module
1756-PA75RA ControlLogix Redundant Power Supply
1756-OF4 ControlLogix Four (4) channel analog output module
1756-OB32 ControlLogix Discrete output module
1756-L542 Allen-Bradley SLC 5/03 controller
1756-L75 Allen-Bradley ControlLogix Controller
1756-L71S Programmable controller
1756-L71 ControlLogix Logix5571 processor module
1756-L61 ControlLogix controller
1756-IF8H ControlLogix I/O module
1756-IB32 Input module
1756-IB16 I/O module
1756-ENBT Optical fiber interface board module
1756-EN2TXT Ethernet /IP module
1756-EN2TR Communication module
1756-EN2TEthernet /IP module
1756-DNB Scanner module
1756-DHRIO Programmable controlle
1756-BATM Programmable logic controller
1756-A13 chassis
1755T-PMPP-1700 Touch screen
1755-A6 module
1747-SDN Communication module
1747-KE Communication module
1747-FC Input/output module
1747-DCM Input/output module
1747-C10 driver
1747-ACNR15 Processor module
1746-P4 Power module
1746-OV8 Programmable controller
1746-OB16E Allen-Bradley Programmable controller
1746-OA8 Programmable controller
1746-IV32 Allen-Bradley SLC 500 Discrete Input module
1746-A2 Programmable logic control
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