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
Display operation panel IISACO1
Display operation panel IISAC01
Display operation panel IISAC01
Display operation panel IIPLM01
Display operation panel IIMTM01
Display operation panel IIMSM01
Display operation panel IIMRM02
Display operation panel IIMRM01
Display operation panel IIMPM02
Display operation panel IIMPM01
Display operation panel IIMLM01
Display operation panel IIMKM02A
Display operation panel IIMKM02
Display operation panel IIMKM01A
Display operation panel IIMKM01
Display operation panel IIMGC04
Display operation panel IIMGC03
Display operation panel IIMGC02
Display operation panel IIMGC01
Display operation panel IIMCP02
Display operation panel IIMCP01
Display operation panel IIMCL01
Display operation panel IIEDI01
Display operation panel IIAMS01
Display operation panel IIADP02
Display operation panel IIADP01
Display operation panel IEPWM02
Display operation panel IEPU02
Display operation panel IEPRD01
Display operation panel IEPMU01
Display operation panel IEPEP07
Display operation panel IEPEP04
Display operation panel IEPEP03
Display operation panel IEPEP01
Display operation panel IEPDS02
Display operation panel IEPDS01
Display operation panel IEPDP01
Display operation panel IEPBM01
Display operation panel IEPAS02
Display operation panel IEPAS02
Display operation panel IEPAS01
Display operation panel IEPAS01
Display operation panel IEPAF02
Display operation panel IEPAF01
Display operation panel IEMMU22
Display operation panel IEMMU21
Display operation panel IEMMU21
Display operation panel IEMMU21
Display operation panel IEMMU21
Display operation panel IEMMU12
Display operation panel IEMMU11
Display operation panel IEMMU04
Display operation panel IEMMU02
Display operation panel IEMMU01
Display operation panel IEMMU01
Display operation panel IEFAN90
Display operation panel IEFAN02
Display operation panel IEFAN01
Display operation panel IDPG 940128102
Display operation panel ICST08A9
Display operation panel ICSK20F1
Display operation panel ICSE08B5
Display operation panel ICSE08B5
Display operation panel ICSA04B5
Display operation panel IBA 940143201
Display operation panel IAM MODULE
Display operation panel HVC-02B 3HNA024966-00103
Display operation panel HVC-02 3HNA011999-001
Display operation panel HVC-01 2A 3HNA008270-001
Display operation panel HPC800K02
Display operation panel HIES207036R003
Display operation panel HIER466665R0099
Reviews
There are no reviews yet.