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
135489-03 Bently Nevada I/O module
DI3201 DI3201-A-V001 TRICONEX Analog output module
9200-01-01-10-00 Bently Nevada Two-Wire Velocity Seismoprobe Transducer
8521-LC-MT GE Logic Controller
8421-CC-PS GE CONTROLLER POWER CABLE
3511 TRICONEX 3511 Pulse Input Module
VT-HNC100-1-23 W-08-0-0 R900955334 Rexroth Digital Axis Controllers
705-1512-01 GE Processor module
T9451 ICS TRIPLEX AADvance Controllers series
SAN3-40 SAN3-40M DDK Servo Axis Controller
T9402 ICS TRIPLEX AADvance Controllers series
PR6423002-001-CN EPRO Eddy Current Sensor
PQM-T20-C-A GE POWER QUALITY METER
PDP800 ABB Profibus DP V0/V1/V2 Master Module
IS200EPSMG1ABB GE Exciter Power Supply Module
F35 HIMA Safety-Related Controller
F3 DIO 88 01 HIMA Safety-Related Controller
F3 AIO 84 01 HIMA Safety-Related Controller
DS200DCFBG1BNC GE Power Supply Board
CP451-51 YOKOGAWA Processor Module
A4H254-8F8T P0973JP Enterasys Network Switch
9200-06-02-10-00 Bently Nevada Two-Wire Transducer
8937-HN HONEYWELL Fiber Optic Extender Module
T9110 ICS TRIPLEX AADvance Processor Module
140CRA93200 Schneider RIO DROP ADAPTOR MODULE
CACR-02-TE1K YASKAWA
140DDI35300 Schneider DISCRETE INPUT MODULE
140CPU11303 Schneider 512k CPU Module
140CPS11420 Schneider Power Supply Module
140CPS11100 Schneider POWER SUPPLY MODULE
140AMM09000 Schneider Analog Input Output Module
140ACI03000 Schneider Analog Input Module
FBM207C RH917GY FOXBORO 16 DIN 48 VDC CONTACT SENSE
FBM219 RH916RH FOXBORO Isolated 24 Input Voltage Monitor
FBM237 RH914XS FOXBORO Channel Isolated Output Interface Module
RH924YF FOXBORO DIN-Rail Mounted Modular Baseplate
SCXI-1349 NI Shielded Cable Adapter
8312 Triconex 8312 Power Supply Module
PMC-HS-SERIAL SBS Quad Channel High Speed Module
PMC661J Ramix Ethernet Interface Card
VMIACC-5595-208 350-805595-208L GE 2 Gb/s Reflective Memory Hub Assembly
IS420ESWBH3A GE Mark VIe turbine control system
EPL-10200-XX LENZE OPERATOR MODULE
AL8XGTE1S 8055003 SONIX data collecting/acquisition card
140CPU67060 Schneider UNITY HOT STANDBY PROCESSOR
PR9268/300-000 EPRO Eddy Current Sensor
AIH 3723X TRICONEX 0-5Vdc Analonglnput
DO 3626X TRICONEX 24Vdc Supervised Digital Output
DI 3506X TRICONEX SIS safety instrument system
IMSS 4701X TRICONEX Card Components Module
Reviews
There are no reviews yet.