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
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ADEPT ADEPT 101
ADEPT EJI90340-40000
ADEPT SCARA 550
ABB PPD513A24–110110
ABB PPD513A24–110110 3BHE039724R2441
ABB 3BUP001190R1
ABB CI532V09
ABB CI532V09 3BUP001190R1
ABB 3BHE039724R2441
ABB PPD513 A24-110110
ABB PPD513 A24-110110 3BHE039724R2441
ABB PPD513 A24-110110: AC800PEC
EATON XVH-340-57CAN-1-10
EATON DPM-MC2
EATON XVS-460-57MPI-1-1E
EATON ST-GF1-10TVD-102
EATON ST-GF1-10TVD-102 MPB1-TP
EATON MTL831C
EATON XV-430-12TSB-1-10
EATON XV-440-10TVB-1-13-1
EATON XV-440-12TSB-1-10
EATON XV-442-57CQB-1-10
EATON XVS-430-10MPI-1-10
EATON XVS-440-10MPI-1-1AD
EATON XVS-440-57MPI-1-1A0
IS230TCATH1A | GE TCAT Assembly / Core Analog
GE IS230PCAAH1B
GE IS230PCAAH1A
GE IS220PPROH1A
GE IS230TREAH3A
GE IS230TNSVH1A
GE IS230TNDSH2A
GE IS230STTCH2A
GE IS230STAIH2A
GE IS230SRTDH1A
GE IS230SNAOH2A
MOTOROLA DB1-1 DB1-FALCON
ABB POS.A6092
ABB HIEE300890R0001
ABB HIEE300890R0001 POS.A6092
ABB POS.A6091
ABB 3AFE61320946P0001
ABB 3AFE61320946P0001 POS.A6091
ABB POS.A6033
ABB 3BHB007445P0001
ABB 3BHB007445P0001 POS.A6033
3BHE006414R0001 ABB
XVC770AE ABB
XVC770AE 3BHE006414R0001 ABB
ABB HIEE401782R0001
ABB LTC391AE01
ABB LTC391AE01 HIEE401782R0001
HIMA H4135A 992413560
HIMA H4135 992413502
HONEYWLL FC-PSU-UNI2450U V2.1
HONEYWLL CC-PAOH01
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