Description
hardware flow control. It is an ideal choice in the field of industrial automation.
2. Principle of frequency converter
In embedded development, the control of motors is often involved. Currently, frequency conversion control of AC motors is widely used, so let”s briefly introduce the
frequency converter by looking at the diagram, assuming that you already understand the principle of the motor.
The block diagram is as follows:
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 inverter relies on the switching of the internal IGBT to adjust the voltage and frequency of the output power supply, and provides the required power supply voltage
according to the actual needs of the motor, thereby achieving the purpose of energy saving and speed regulation. In addition, the inverter also has many protection functions.
, such as overcurrent, overvoltage, overload protection, etc. With the continuous improvement of industrial automation, frequency converters have also been widely used.
A typical inverter system diagram is shown below. It mainly includes operation panel, VFD controller, motor and other parts.
1. Typical structure:
Mainly includes: control platform, measurement circuit, power circuit, protection circuit, etc.
There are two common types of frequency converters: voltage type and current type. Among them, the power inverter part mostly uses power
tubes such as IGBT and IGCT.
2. Typical algorithm:
Among them, the control algorithm represented by Siemens is mainly based on coordinate transformation (vector control). Friends who are
interested in the algorithm represented by ABB can search for information by themselves (direct torque control) and will not go into details here.
3. Vector control:
Many chip MCU and MPU manufacturers have provided block diagrams and algorithm libraries for variable frequency vector control. Those
who are interested can study it. For example, the following figure is a block diagram provided by Microchip
https://www.xmamazon.com
https://www.xmamazon.com
https://www.plcdcs.com/
www.module-plc.com/
https://www.ymgk.com
GE IC697BEM713 Bus Transmitter Module (BTM)
GE IC697BEM711 Bus Receiver Module (BRM)
INTELLISCANDE14-405NM SCANLAB intelliSCAN scan heads
SQ-300I 8700700-006 Hybrid automatic voltage control (AVC)
CMA130 3DDE300410 ABB temperature controller
301131 PILZ Security bus module
T8111C ICS TRIPLEX Trusted TMR Processor
C2G170-24 P0973BL ENTERASYS network switch
PLATE F860-CA redundant fieldbus power
STK-RPS-150PS P0973BP Optical fiber interface board module
CLS216-10000000 WATLOW ANAFAZE CLS200 CONTROLLER
MT30R4-37 SEM D.C. Servomotors
SAI143-H53 Yokogawa Analog Input Module
DS200FCGDH1B Mark V Gate Distribution and Status Card FCGD
DS200VPBLG1A GE VME Backplane Board
DS200DDTBG1A LCI Auxiliary I/O Terminal Board
07DC92D GJR5252200R0101 Analog input and output module
2711P-B6C20D PanelView Plus 6 600 color terminal
FC-SDO-0824 V1.3 Safe Digital Output Module 24Vdc 0.55A 8ch
C200/10/1/1/100 ELAU programmable controller
PM866 3BSE050200R1 ABB PM866A controller
9905-973 Woodward controller turbine electric ship parts
TK-CCR014 HONEYWELL Redundant Net Interface Module
SLIO-02 ROLLS-ROYCE Controller module
ACR1000A-R2 Agility series optical fiber KVM wood extension
IRDH275B-435 Digital Ground Fault Monitor / Ground Detector
2098-DSD-020X/C Ultra 3000 Drive Module
BG65X50SI Dunkermotoren brushless DC motor
DPS112 MARITIME DGNSS SENSOR FOR WORLDWIDE OPERATIONS
MVI94-MCM-MHI PROSOFT Network Interface Module
VTR-5-PY DEIF Bridge wing indicator
DLQW72-PC-PY DEIF Marine bridge instrumentation
SPS5713 51199930-100 Power Transistor Devices
2301E 8273-1011 provides load sharing and speed control
VMIVME-7750-734001 ProcessorBased VME Single Board
SE3008 KJ2005X1-MQ2 13P0072X082 DeltaV™ SQ Controller
A6500-CC 9199-00120 System Communication Card
MVME761-001 MOTOROLA Transition Module
MVME2604761 I/O MOTOROLA single-board computer
VMIVME-7750-746001 ProcessorBased VME Single Board
TRICON 9566-8XX Terminal base
REF620E_F NBFNAAAANDA1BNN1XF Feeder protection and control
MVME51105E-2161 MOTOROLA single-board computer
SR489-P1-HI-A20-E-H GE generator management relay
531X302DCIAWG1 GE DC Instrumentation Card
PR6426/010-140+CON021 Eddy Current Signal Converter
8507-BI-DP PROFIBUS DP Bus Interface Module and Carrier
TRICON 4000093-510 External Terminal Input Cable Assembly
9907-147 ProTech 203 De-Energize-to-Trip Overspeed
VMIACC-5595-208 Reflective Memory Hub Assembly
PCD237A101 3BHE028915R0101 AC 800PEC control system
CI627A 3BSE017457R1 ABB controller module
TRICON 4000093-145 External Terminal Input Cable Assembly
XVC722AE101 3BHB002751R0101 ABB
CT11T7F10PN1 PMC676RCTX Network Interface Card
E33NCHA-LNN-NS-00 Servo driver PACIFIC SCIENTIFIC
SQ-300I 8700700-004 Hybrid automatic voltage control
Reviews
There are no reviews yet.