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 PM866
Display operation panel PM866
Display operation panel PM866
Display operation panel PM865K02 3BSE031150R1
Display operation panel PM865K02
Display operation panel PM865K02
Display operation panel PM865K01 3BSE031151R1
Display operation panel PM865K01 3BSE031151R1
Display operation panel PM865K01
Display operation panel PM865K01
Display operation panel PM864K01
Display operation panel PM864AK02
Display operation panel PM864AK02
Display operation panel PM864AK01 3BSE018161R1
Display operation panel PM864AK01 3BSE018161R1
Display operation panel PM864AK01 3BSE018161R1
Display operation panel PM864AK01
Display operation panel PM864AK01
Display operation panel PM864AK01
Display operation panel PM864A 3BSE018162R1
Display operation panel PM864A
Display operation panel PM864A
Display operation panel PM864A
Display operation panel PM864
Display operation panel PM863K02
Display operation panel PM862K02 3BSE081636R1
Display operation panel PM862K01
Display operation panel PM861K02
Display operation panel PM861K01
Display operation panel PM861K01
Display operation panel PM861AK02
Display operation panel PM861AK02
Display operation panel PM861AK02
Display operation panel PM861AK01 3BSE018157R1
Display operation panel PM861AK01
Display operation panel PM861AK01
Display operation panel PM861AK01
Display operation panel PM861AK01
Display operation panel PM861
Display operation panel PM860K01
Display operation panel PM860K01
Display operation panel PM860AK01
Display operation panel PM860AK01
Display operation panel PM860AK01
Display operation panel PM860A
Display operation panel PM860A
Display operation panel PM860
Display operation panel PM858K02
Display operation panel PM858 3BSE093350R1
Display operation panel PM856K01 3BSE018104R1
Display operation panel PM856K01
Display operation panel PM856K01
Display operation panel PM856AK02
Display operation panel PM856AK01
Display operation panel PM856AK01
Display operation panel PM856AK01
Display operation panel PM856
Display operation panel PM851K01
Display operation panel PM851AK01
Display operation panel PM851AK01
Display operation panel PM825 3BSE010796R1
Display operation panel PM825 3BSE010796R1
Display operation panel PM825
Display operation panel PM825
Display operation panel PM803F-Z
Display operation panel PM803F 3BDH000530R1
Display operation panel PM803F 3BDH000530R1
Display operation panel PM803F
Display operation panel PM803F
Display operation panel PM803F
Display operation panel PM802F-Z
Display operation panel PM802F/3BDH000002R1
Display operation panel pM802F
Display operation panel PM802F
Display operation panel PM802F
Display operation panel PM783FB2
Display operation panel PM783F 3BDH000364R0002
Display operation panel PM783F 3BDH000364R0001
Display operation panel PM783F
Reviews
There are no reviews yet.