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
Control module DCS system spare parts NKLS01-10
Control module DCS system spare parts NKLM01-5
Control module DCS system spare parts NKLM01-4
Control module DCS system spare parts NKEB02
Control module DCS system spare parts NKEB01
Control module DCS system spare parts NKDS01-100
Control module DCS system spare parts NKDO01-5
Control module DCS system spare parts NKDO01-2
Control module DCS system spare parts NKCS01-10
Control module DCS system spare parts NKCL01-7
Control module DCS system spare parts NKCL01-6
Control module DCS system spare parts NKCL01-33
Control module DCS system spare parts NKCL01-20
Control module DCS system spare parts NKCL01-10
Control module DCS system spare parts NKAS11-15
Control module DCS system spare parts NKAS11-12
Control module DCS system spare parts NKAS01-9
Control module DCS system spare parts NKAS01-8
Control module DCS system spare parts NKAS01-15
Control module DCS system spare parts NKAS01-13
Control module DCS system spare parts NKAS01-12
Control module DCS system spare parts NKAS01-11
Control module DCS system spare parts NKAS01-10
Control module DCS system spare parts NIS21
Control module DCS system spare parts NIRL03
Control module DCS system spare parts NIRL01
Control module DCS system spare parts NIPL01
Control module DCS system spare parts NIOX01
Control module DCS system spare parts NIOP02
Control module DCS system spare parts NINT-64
Control module DCS system spare parts NIMP02
Control module DCS system spare parts NIMP01
Control module DCS system spare parts NIMP01
Control module DCS system spare parts NIMP01
Control module DCS system spare parts NIMF02
Control module DCS system spare parts NIMF01
Control module DCS system spare parts NIDS01
Control module DCS system spare parts NIDO01
Control module DCS system spare parts NIDI01
Control module DCS system spare parts NICS01
Control module DCS system spare parts NICL01
Control module DCS system spare parts NIAO01
Control module DCS system spare parts NIAM02
Control module DCS system spare parts NIAM01
Control module DCS system spare parts NIAI05
Control module DCS system spare parts NIAI04
Control module DCS system spare parts NIAI03
Control module DCS system spare parts NIAI02
Control module DCS system spare parts NIAI01
Control module DCS system spare parts NIA001
Control module DCS system spare parts NHSS01
Control module DCS system spare parts NGCM02
Control module DCS system spare parts NGCM01
Control module DCS system spare parts NFTP01
Control module DCS system spare parts NFTP01
Control module DCS system spare parts NFCS01
Control module DCS system spare parts NFBA01
Control module DCS system spare parts NFAN02
Control module DCS system spare parts NFAN01
Control module DCS system spare parts NF93A-2
Control module DCS system spare parts Nextmove E100
Control module DCS system spare parts NE870 3BSE080239R1
Control module DCS system spare parts NDSO04
Reviews
There are no reviews yet.